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2022-04-27gdb: remove BLOCK_{START,END} macrosSimon Marchi1-1/+1
Replace with equivalent methods. Change-Id: I10a6c8a2a86462d9d4a6a6409a3f07a6bea66310
2022-04-20Replace symbol_symtab with symbol::symtabTom Tromey1-1/+1
This turns symbol_symtab into a method on symbol. It also replaces symbol_set_symtab with a method.
2022-04-11gdb: remove symbol value macrosSimon Marchi1-2/+2
Remove all macros related to getting and setting some symbol value: #define SYMBOL_VALUE(symbol) (symbol)->value.ivalue #define SYMBOL_VALUE_ADDRESS(symbol) \ #define SET_SYMBOL_VALUE_ADDRESS(symbol, new_value) \ #define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes #define SYMBOL_VALUE_COMMON_BLOCK(symbol) (symbol)->value.common_block #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain #define MSYMBOL_VALUE(symbol) (symbol)->value.ivalue #define MSYMBOL_VALUE_RAW_ADDRESS(symbol) ((symbol)->value.address + 0) #define MSYMBOL_VALUE_ADDRESS(objfile, symbol) \ #define BMSYMBOL_VALUE_ADDRESS(symbol) \ #define SET_MSYMBOL_VALUE_ADDRESS(symbol, new_value) \ #define MSYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes #define MSYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block Replace them with equivalent methods on the appropriate objects. Change-Id: Iafdab3b8eefc6dc2fd895aa955bf64fafc59ed50
2022-03-29Unify gdb printf functionsTom Tromey1-25/+25
Now that filtered and unfiltered output can be treated identically, we can unify the printf family of functions. This is done under the name "gdb_printf". Most of this patch was written by script.
2022-02-06gdb: remove SYMBOL_LINE macroSimon Marchi1-2/+2
Add a getter and a setter for a symbol's line. Remove the corresponding macro and adjust all callers. Change-Id: I229f2b8fcf938c07975f641361313a8761fad9a5
2022-01-18Move gdb obstack code to gdbsupportTom Tromey1-1/+1
This moves the gdb-specific obstack code -- both extensions like obconcat and obstack_strdup, and things like auto_obstack -- to gdbsupport.
2022-01-01Automatic Copyright Year update after running gdb/copyright.pyJoel Brobecker1-1/+1
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
2021-12-03gdb: trivial changes to use array_viewSimon Marchi1-1/+1
Change a few relatively obvious spots using value contents to propagate the use array_view a bit more. Change-Id: I5338a60986f06d5969fec803d04f8423c9288a15
2021-12-03gdb: make extract_integer take an array_viewSimon Marchi1-3/+1
I think it would make sense for extract_integer, extract_signed_integer and extract_unsigned_integer to take an array_view. This way, when we extract an integer, we can validate that we don't overflow the buffer passed by the caller (e.g. ask to extract a 4-byte integer but pass a 2-byte buffer). - Change extract_integer to take an array_view - Add overloads of extract_signed_integer and extract_unsigned_integer that take array_views. Keep the existing versions so we don't need to change all callers, but make them call the array_view versions. This shortens some places like: result = extract_unsigned_integer (value_contents (result_val).data (), TYPE_LENGTH (value_type (result_val)), byte_order); into result = extract_unsigned_integer (value_contents (result_val), byte_order); value_contents returns an array view that is of length `TYPE_LENGTH (value_type (result_val))` already, so the length is implicitly communicated through the array view. Change-Id: Ic1c1f98c88d5c17a8486393af316f982604d6c95
2021-10-28gdb: add add_setshow_prefix_cmdSimon Marchi1-6/+5
There's a common pattern to call add_basic_prefix_cmd and add_show_prefix_cmd to add matching set and show commands. Add the add_setshow_prefix_cmd function to factor that out and use it at a few places. Change-Id: I6e9e90a30e9efb7b255bf839cac27b85d7069cfd
2021-10-25gdb: change functions returning value contents to use gdb::array_viewSimon Marchi1-10/+13
The bug fixed by this [1] patch was caused by an out-of-bounds access to a value's content. The code gets the value's content (just a pointer) and then indexes it with a non-sensical index. This made me think of changing functions that return value contents to return array_views instead of a plain pointer. This has the advantage that when GDB is built with _GLIBCXX_DEBUG, accesses to the array_view are checked, making bugs more apparent / easier to find. This patch changes the return types of these functions, and updates callers to call .data() on the result, meaning it's not changing anything in practice. Additional work will be needed (which can be done little by little) to make callers propagate the use of array_view and reap the benefits. [1] https://sourceware.org/pipermail/gdb-patches/2021-September/182306.html Change-Id: I5151f888f169e1c36abe2cbc57620110673816f3
2021-09-27gdb: prevent an assertion when computing the frame_id for an inline frameAndrew Burgess1-8/+52
I ran into this assertion while GDB was trying to unwind the stack: gdb/inline-frame.c:173: internal-error: void inline_frame_this_id(frame_info*, void**, frame_id*): Assertion `frame_id_p (*this_id)' failed. That is, when building the frame_id for an inline frame, GDB asks for the frame_id of the previous frame. Unfortunately, no valid frame_id was returned for the previous frame, and so the assertion triggers. What is happening is this, I had a stack that looked something like this (the arrows '->' point from caller to callee): normal_frame -> inline_frame However, for whatever reason (e.g. broken debug information, or corrupted stack contents in the inferior), when GDB tries to unwind "normal_frame", it ends up getting back effectively the same frame, thus the call stack looks like this to GDB: .-> normal_frame -> inline_frame | | '-----' Given such a situation we would expect GDB to terminate the stack with an error like this: Backtrace stopped: previous frame identical to this frame (corrupt stack?) However, the inline_frame causes a problem, and here's why: When unwinding we start from the sentinel frame and call get_prev_frame. We eventually end up in get_prev_frame_if_no_cycle, in here we create a raw frame, and as this is frame #0 we immediately return. However, eventually we will try to unwind the stack further. When we do this we inevitably needing to know the frame_id for frame #0, and so, eventually, we end up in compute_frame_id. In compute_frame_id we first find the right unwinder for this frame, in our case (i.e. for inline_frame) the $pc is within the function normal_frame, but also within a block associated with the inlined function inline_frame, as such the inline frame unwinder claims this frame. Back in compute_frame_id we next compute the frame_id, for our inline_frame this means a call to inline_frame_this_id. The ID of an inline frame is based on the id of the previous frame, so from inline_frame_this_id we call get_prev_frame_always, this eventually calls get_prev_frame_if_no_cycle again, which creates another raw frame and calls compute_frame_id (for frames other than frame 0 we immediately compute the frame_id). In compute_frame_id we again identify the correct unwinder for this frame. Our $pc is unchanged, however, the fact that the next frame is of type INLINE_FRAME prevents the inline frame unwinder from claiming this frame again, and so, the standard DWARF frame unwinder claims normal_frame. We return to compute_frame_id and call the standard DWARF function to build the frame_id for normal_frame. With the frame_id of normal_frame figured out we return to compute_frame_id, and then to get_prev_frame_if_no_cycle, where we add the ID for normal_frame into the frame_id cache, and return the frame back to inline_frame_this_id. From inline_frame_this_id we build a frame_id for inline_frame and return to compute_frame_id, and then to get_prev_frame_if_no_cycle, which adds the frame_id for inline_frame into the frame_id cache. So far, so good. However, as we are trying to unwind the complete stack, we eventually ask for the previous frame of normal_frame, remember, at this point GDB doesn't know the stack is corrupted (with a cycle), GDB still needs to figure that out. So, we eventually end up in get_prev_frame_if_no_cycle where we create a raw frame and call compute_frame_id, remember, this is for the frame before normal_frame. The first task for compute_frame_id is to find the unwinder for this frame, so all of the frame sniffers are tried in order, this includes the inline frame sniffer. The inline frame sniffer asks for the $pc, this request is sent up the stack to normal_frame, which, due to its cyclic behaviour, tells GDB that the $pc in the previous frame was the same as the $pc in normal_frame. GDB spots that this $pc corresponds to both the function normal_frame and also the inline function inline_frame. As the next frame is not an INLINE_FRAME then GDB figures that we have not yet built a frame to cover inline_frame, and so the inline sniffer claims this new frame. Our stack is now looking like this: inline_frame -> normal_frame -> inline_frame But, we have not yet computed the frame id for the outer most (on the left) inline_frame. After the frame sniffer has claimed the inline frame GDB returns to compute_frame_id and calls inline_frame_this_id. In here GDB calls get_prev_frame_always, which eventually ends up in get_prev_frame_if_no_cycle again, where we create a raw frame and call compute_frame_id. Just like before, compute_frame_id tries to find an unwinder for this new frame, it sees that the $pc is within both normal_frame and inline_frame, but the next frame is, again, an INLINE_FRAME, so, just like before the standard DWARF unwinder claims this frame. Back in compute_frame_id we again call the standard DWARF function to build the frame_id for this new copy of normal_frame. At this point the stack looks like this: normal_frame -> inline_frame -> normal_frame -> inline_frame After compute_frame_id we return to get_prev_frame_if_no_cycle, where we try to add the frame_id for the new normal_frame into the frame_id cache, however, unlike before, we fail to add this frame_id as it is a duplicate of the previous normal_frame frame_id. Having found a duplicate get_prev_frame_if_no_cycle unlinks the new frame from the stack, and returns nullptr, the stack now looks like this: inline_frame -> normal_frame -> inline_frame The nullptr result from get_prev_frame_if_no_cycle is fed back to inline_frame_this_id, which forwards this to get_frame_id, which immediately returns null_frame_id. As null_frame_id is not considered a valid frame_id, this is what triggers the assertion. In summary then: - inline_frame_this_id currently assumes that as the inline frame exists, we will always get a valid frame back from get_prev_frame_always, - get_prev_frame_if_no_cycle currently assumes that it is safe to return nullptr when it sees a cycle. Notice that in frame.c:compute_frame_id, this code: fi->this_id.value = outer_frame_id; fi->unwind->this_id (fi, &fi->prologue_cache, &fi->this_id.value); gdb_assert (frame_id_p (fi->this_id.value)); The assertion makes it clear that the this_id function must always return a valid frame_id (e.g. null_frame_id is not a valid return value), and similarly in inline_frame.c:inline_frame_this_id this code: *this_id = get_frame_id (get_prev_frame_always (this_frame)); /* snip comment */ gdb_assert (frame_id_p (*this_id)); Makes it clear that every inline frame expects to be able to get a previous frame, which will have a valid frame_id. As I have discussed above, these assumptions don't currently hold in all cases. One possibility would be to move the call to get_prev_frame_always forward from inline_frame_this_id to inline_frame_sniffer, however, this falls foul of (in frame.c:frame_cleanup_after_sniffer) this assertion: /* No sniffer should extend the frame chain; sniff based on what is already certain. */ gdb_assert (!frame->prev_p); This assert prohibits any sniffer from trying to get the previous frame, as getting the previous frame is likely to depend on the next frame, I can understand why this assertion is a good thing, and I'm in no rush to alter this rule. The solution proposed here takes onboard feedback from both Pedro, and Simon (see the links below). The get_prev_frame_if_no_cycle function is renamed to get_prev_frame_maybe_check_cycle, and will now not do cycle detection for inline frames, even when we spot a duplicate frame it is still returned. This is fine, as, if the normal frame has a duplicate frame-id then the inline frame will also have a duplicate frame-id. And so, when we reject the inline frame, the duplicate normal frame, which is previous to the inline frame, will also be rejected. In inline-frame.c the call to get_prev_frame_always is no longer nested inside the call to get_frame_id. There are reasons why get_prev_frame_always can return nullptr, for example, if there is a memory error while trying to get the previous frame, if this should happen then we now give a more informative error message. Historical Links: Patch v2: https://sourceware.org/pipermail/gdb-patches/2021-June/180208.html Feedback: https://sourceware.org/pipermail/gdb-patches/2021-July/180651.html https://sourceware.org/pipermail/gdb-patches/2021-July/180663.html Patch v3: https://sourceware.org/pipermail/gdb-patches/2021-July/181029.html Feedback: https://sourceware.org/pipermail/gdb-patches/2021-July/181035.html Additional input: https://sourceware.org/pipermail/gdb-patches/2021-September/182040.html
2021-09-07gdb: make thread_info::executing privateAndrew Burgess1-1/+1
Rename thread_info::executing to thread_info::m_executing, and make it private. Add a new get/set member functions, and convert GDB to make use of these. The only real change of interest in this patch is in thread.c where I have deleted the helper function set_executing_thread, and now just use the new set function thread_info::set_executing. However, the old helper function set_executing_thread included some code to reset the thread's stop_pc, so I moved this code into the new function thread_info::set_executing. However, I don't believe there is anywhere that this results in a change of behaviour, previously the executing flag was always set true through a call to set_executing_thread anyway.
2021-08-04gdb: Use unwinder name in frame_info::to_stringLancelot SIX1-2/+2
While working on a stack unwinding issue using 'set debug frame on', I noticed the frame_info::to_string method could be slightly improved. Unwinders have been given a name in a154d838a70e96d888620c072e2d6ea8bdf044ca. Before this patch, frame_info debug output prints the host address of the used unwinder, which is not easy to interpret. This patch proposes to use the unwinder name instead since we now have it. Before the patch: {level=1,type=NORMAL_FRAME,unwind=0x2ac1763ec0,pc=0x3ff7fc3460,id={stack=0x3ff7ea79b0,code=0x0000003ff7fc33ac,!special},func=0x3ff7fc33ac} With the patch: {level=1,type=NORMAL_FRAME,unwinder="riscv prologue",pc=0x3ff7fc3460,id={stack=0x3ff7ea79b0,code=0x0000003ff7fc33ac,!special},func=0x3ff7fc33ac} Tested on riscv64-linux-gnu.
2021-07-27gdb: remove VALUE_FRAME_ID and fix another frame debug issueAndrew Burgess1-18/+7
This commit was originally part of this patch series: (v1): https://sourceware.org/pipermail/gdb-patches/2021-May/179357.html (v2): https://sourceware.org/pipermail/gdb-patches/2021-June/180208.html (v3): https://sourceware.org/pipermail/gdb-patches/2021-July/181028.html However, that series is being held up in review, so I wanted to break out some of the non-related fixes in order to get these merged. This commit addresses two semi-related issues, both of which are problems exposed by using 'set debug frame on'. The first issue is in frame.c in get_prev_frame_always_1, and was introduced by this commit: commit a05a883fbaba69d0f80806e46a9457727fcbe74c Date: Tue Jun 29 12:03:50 2021 -0400 gdb: introduce frame_debug_printf This commit replaced fprint_frame with frame_info::to_string. However, the former could handle taking a nullptr while the later, a member function, obviously requires a non-nullptr in order to make the function call. In one place we are not-guaranteed to have a non-nullptr, and so, there is the possibility of triggering undefined behaviour. The second issue addressed in this commit has existed for a while in GDB, and would cause this assertion: gdb/frame.c:622: internal-error: frame_id get_frame_id(frame_info*): Assertion `fi->this_id.p != frame_id_status::COMPUTING' failed. We attempt to get the frame_id for a frame while we are computing the frame_id for that same frame. What happens is that when GDB stops we create a frame_info object for the sentinel frame (frame #-1) and then we attempt to unwind this frame to create a frame_info object for frame #0. In the test case used here to expose the issue we have created a Python frame unwinder. In the Python unwinder we attemt to read the program counter register. Reading this register will initially create a lazy register value. The frame-id stored in the lazy register value will be for the sentinel frame (lazy register values hold the frame-id for the frame from which the register will be unwound). However, the Python unwinder does actually want to examine the value of the program counter, and so the lazy register value is resolved into a non-lazy value. This sends GDB into value_fetch_lazy_register in value.c. Now, inside this function, if 'set debug frame on' is in effect, then we want to print something like: frame=%d, regnum=%d(%s), .... Where 'frame=%d' will be the relative frame level of the frame for which the register is being fetched, so, in this case we would expect to see 'frame=0', i.e. we are reading a register as it would be in frame #0. But, remember, the lazy register value actually holds the frame-id for frame #-1 (the sentinel frame). So, to get the frame_info for frame #0 we used to call: frame = frame_find_by_id (VALUE_FRAME_ID (val)); Where VALUE_FRAME_ID is: #define VALUE_FRAME_ID(val) (get_prev_frame_id_by_id (VALUE_NEXT_FRAME_ID (val))) That is, we start with the frame-id for the next frame as obtained by VALUE_NEXT_FRAME_ID, then call get_prev_frame_id_by_id to get the frame-id of the previous frame. The get_prev_frame_id_by_id function finds the frame_info for the given frame-id (in this case frame #-1), calls get_prev_frame to get the previous frame, and then calls get_frame_id. The problem here is that calling get_frame_id requires that we know the frame unwinder, so then have to try each frame unwinder in turn, which would include the Python unwinder.... which is where we started, and thus we have a loop! To prevent this loop GDB has an assertion in place, which is what actually triggers. Solving the assertion failure is pretty easy, if we consider the code in value_fetch_lazy_register and get_prev_frame_id_by_id then what we do is: 1. Start with a frame_id taken from a value, 2. Lookup the corresponding frame, 3. Find the previous frame, 4. Get the frame_id for that frame, and 5. Lookup the corresponding frame 6. Print the frame's level Notice that steps 3 and 5 give us the exact same result, step 4 is just wasted effort. We could shorten this process such that we drop steps 4 and 5, thus: 1. Start with a frame_id taken from a value, 2. Lookup the corresponding frame, 3. Find the previous frame, 6. Print the frame's level This will give the exact same frame as a result, and this is what I have done in this patch by removing the use of VALUE_FRAME_ID from value_fetch_lazy_register. Out of curiosity I looked to see how widely VALUE_FRAME_ID was used, and saw it was only used in one other place in valops.c:value_assign, where, once again, we take the result of VALUE_FRAME_ID and pass it to frame_find_by_id, thus introducing a redundant frame_id lookup. I don't think the value_assign case risks triggering the assertion though, as we are unlikely to call value_assign while computing the frame_id for a frame, however, we could make value_assign slightly more efficient, with no real additional complexity, by removing the use of VALUE_FRAME_ID. So, in this commit, I completely remove VALUE_FRAME_ID, and replace it with a use of VALUE_NEXT_FRAME_ID, followed by a direct call to get_prev_frame_always, this should make no difference in either case, and resolves the assertion issue from value.c. As I said, this patch was originally part of another series, the original test relied on the fixes in that original series. However, I was able to create an alternative test for this issue by enabling frame debug within an existing test script. This commit probably fixes bug PR gdb/27938, though the bug doesn't have a reproducer attached so it is not possible to know for sure. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=27938
2021-06-29gdb: introduce FRAME_SCOPED_DEBUG_ENTER_EXITSimon Marchi1-9/+12
Introduce FRAME_SCOPED_DEBUG_ENTER_EXIT and use it to print enter/exit messages in important frame-related functions. I think this helps understand which lower-level operations are done as part of which higher-level operation. And it helps visually skip over a higher-level operation you are not interested in. Here's an example, combined with some py-unwind messages: [frame] frame_unwind_find_by_frame: enter [frame] frame_unwind_find_by_frame: this_frame=0 [frame] frame_unwind_try_unwinder: trying unwinder "dummy" [frame] frame_unwind_try_unwinder: no [frame] frame_unwind_try_unwinder: trying unwinder "dwarf2 tailcall" [frame] frame_unwind_try_unwinder: no [frame] frame_unwind_try_unwinder: trying unwinder "inline" [frame] frame_unwind_try_unwinder: no [frame] frame_unwind_try_unwinder: trying unwinder "jit" [frame] frame_unwind_try_unwinder: no [frame] frame_unwind_try_unwinder: trying unwinder "python" [py-unwind] pyuw_sniffer: enter [frame] frame_unwind_register_value: enter [frame] frame_unwind_register_value: frame=-1, regnum=7(rsp) [frame] frame_unwind_register_value: -> register=7 bytes=[40ddffffff7f0000] [frame] frame_unwind_register_value: exit [py-unwind] pyuw_sniffer: frame=0, sp=0x7fffffffdd40, pc=0x5555555551ec [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_unwind_register_value: enter [frame] frame_unwind_register_value: frame=-1, regnum=6(rbp) [frame] frame_unwind_register_value: -> register=6 bytes=[50ddffffff7f0000] [frame] frame_unwind_register_value: exit [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] get_prev_frame: enter [frame] get_prev_frame_always_1: enter [frame] get_prev_frame_always_1: this_frame=-1 [frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d17c0,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached [frame] get_prev_frame_always_1: exit [frame] get_prev_frame: exit [frame] value_fetch_lazy_register: (frame=0, regnum=6(rbp), ...) -> register=6 bytes=[50ddffffff7f0000] [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_unwind_register_value: enter [frame] frame_unwind_register_value: frame=-1, regnum=7(rsp) [frame] frame_unwind_register_value: -> register=7 bytes=[40ddffffff7f0000] [frame] frame_unwind_register_value: exit [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] get_prev_frame: enter [frame] get_prev_frame_always_1: enter [frame] get_prev_frame_always_1: this_frame=-1 [frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d1824,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached [frame] get_prev_frame_always_1: exit [frame] get_prev_frame: exit [frame] value_fetch_lazy_register: (frame=0, regnum=7(rsp), ...) -> register=7 bytes=[40ddffffff7f0000] [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_unwind_register_value: enter [frame] frame_unwind_register_value: frame=-1, regnum=16(rip) [frame] frame_unwind_register_value: -> register=16 bytes=[ec51555555550000] [frame] frame_unwind_register_value: exit [frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1 [frame] get_prev_frame: enter [frame] get_prev_frame_always_1: enter [frame] get_prev_frame_always_1: this_frame=-1 [frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d1888,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached [frame] get_prev_frame_always_1: exit [frame] get_prev_frame: exit [frame] value_fetch_lazy_register: (frame=0, regnum=16(rip), ...) -> register=16 bytes=[ec51555555550000] [py-unwind] pyuw_sniffer: frame claimed by unwinder test unwinder [py-unwind] pyuw_sniffer: exit [frame] frame_unwind_try_unwinder: yes [frame] frame_unwind_find_by_frame: exit gdb/ChangeLog: * frame.h (FRAME_SCOPED_DEBUG_ENTER_EXIT): New. * frame.c (compute_frame_id, get_prev_frame_always_1, get_prev_frame): Use FRAME_SCOPED_DEBUG_ENTER_EXIT. * frame-unwind.c (frame_unwind_find_by_frame): Likewise. (frame_unwind_register_value): Likewise. Change-Id: I45b69b4ed962e70572bc55b8adfb211483c1eeed
2021-06-29gdb: introduce frame_debug_printfSimon Marchi1-191/+112
Introduce frame_debug_printf, to convert the "frame" debug messages to the new system. Replace fprint_frame with a frame_info::to_string method that returns a string, like what was done with frame_id::to_string. This makes it easier to use with frame_debug_printf. gdb/ChangeLog: * frame.h (frame_debug_printf): New. * frame.c: Use frame_debug_printf throughout when printing frame debug messages. * amd64-windows-tdep.c: Likewise. * value.c: Likewise. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-reg-undefined.exp: Update regexp. Change-Id: I3c230b0814ea81c23af3e1aca1aac8d4ba91d726
2021-06-29gdb: make frame_debug a booleanSimon Marchi1-5/+6
gdb/ChangeLog: * frame.h (frame_debug): Change type to bool. * frame.c (frame_debug): Change type to bool. (_initialize_frame): Adjust. Change-Id: I27b5359a25ad53ac42618b5708a025c348a1eeda
2021-05-12gdb: generate the prefix name for prefix commands on demandMarco Barisione1-2/+2
Previously, the prefixname field of struct cmd_list_element was manually set for prefix commands. This seems verbose and error prone as it required every single call to functions adding prefix commands to specify the prefix name while the same information can be easily generated. Historically, this was not possible as the prefix field was null for many commands, but this was fixed in commit 3f4d92ebdf7f848b5ccc9e8d8e8514c64fde1183 by Philippe Waroquiers, so we can rely on the prefix field being set when generating the prefix name. This commit also fixes a use after free in this scenario: * A command gets created via Python (using the gdb.Command class). The prefix name member is dynamically allocated. * An alias to the new command is created. The alias's prefixname is set to point to the prefixname for the original command with a direct assignment. * A new command with the same name as the Python command is created. * The object for the original Python command gets freed and its prefixname gets freed as well. * The alias is updated to point to the new command, but its prefixname is not updated so it keeps pointing to the freed one. gdb/ChangeLog: * command.h (add_prefix_cmd): Remove the prefixname argument as it can now be generated automatically. Update all callers. (add_basic_prefix_cmd): Ditto. (add_show_prefix_cmd): Ditto. (add_prefix_cmd_suppress_notification): Ditto. (add_abbrev_prefix_cmd): Ditto. * cli/cli-decode.c (add_prefix_cmd): Ditto. (add_basic_prefix_cmd): Ditto. (add_show_prefix_cmd): Ditto. (add_prefix_cmd_suppress_notification): Ditto. (add_prefix_cmd_suppress_notification): Ditto. (add_abbrev_prefix_cmd): Ditto. * cli/cli-decode.h (struct cmd_list_element): Replace the prefixname member variable with a method which generates the prefix name at runtime. Update all code reading the prefix name to use the method, and remove all code setting it. * python/py-cmd.c (cmdpy_destroyer): Remove code to free the prefixname member as it's now a method. (cmdpy_function): Determine if the command is a prefix by looking at prefixlist, not prefixname.
2021-05-09gdb: replace fprint_frame_idAndrew Burgess1-49/+35
Replace fprint_frame_id with a member function frame_id::to_string that returns a std::string. Convert all of the previous users of fprint_frame_id to use the new member function. This means that instead of writing things like this: fprintf_unfiltered (file, " id="); fprint_frame_id (file, s->id.id); We can write this: fprintf_unfiltered (file, " id=%s", s->id.id.to_string ().c_str ()); There should be no user visible changes after this commit. gdb/ChangeLog: * dummy-frame.c (fprint_dummy_frames): Convert use of fprint_frame_id to use frame_id::to_string. * frame.c (fprint_field): Delete. (fprint_frame_id): Moved to... (frame_id::to_string): ...this, rewritten to return a string. (fprint_frame): Convert use of fprint_frame_id to use frame_id::to_string. (compute_frame_id): Likewise. (frame_id_p): Likewise. (frame_id_eq): Likewise. (frame_id_inner): Likewise. * frame.h (struct frame_id) <to_string>: New member function. (fprint_frame_id): Delete declaration. * guile/scm-frame.c (frscm_print_frame_smob): Convert use of fprint_frame_id to use frame_id::to_string. * python/py-frame.c (frame_object_to_frame_info): Likewise. * python/py-unwind.c (unwind_infopy_str): Likewise. (pyuw_this_id): Likewise.
2021-04-24gdbsupport, gdb: give names to observersSimon Marchi1-1/+2
Give a name to each observer, this will help produce more meaningful debug message. gdbsupport/ChangeLog: * observable.h (class observable) <struct observer> <observer>: Add name parameter. <name>: New field. <attach>: Add name parameter, update all callers. Change-Id: Ie0cc4664925215b8d2b09e026011b7803549fba0
2021-03-24gdb: remove current_top_target functionSimon Marchi1-3/+2
The current_top_target function is a hidden dependency on the current inferior. Since I'd like to slowly move towards reducing our dependency on the global current state, remove this function and make callers use current_inferior ()->top_target () There is no expected change in behavior, but this one step towards making those callers use the inferior from their context, rather than refer to the global current inferior. gdb/ChangeLog: * target.h (current_top_target): Remove, make callers use the current inferior instead. * target.c (current_top_target): Remove. Change-Id: Iccd457036f84466cdaa3865aa3f9339a24ea001d
2021-01-19Convert some frame functions to use gdb::array_view.Luis Machado1-6/+14
This patch converts the most obvious functions from gdb/frame.h to use the gdb::array_view abstraction. I've converted the ones that used buffer + length. There are others using only the buffer, with an implicit size. I did not touch those for now. But it would be nice to pass the size for safety. Tested with --enable-targets=all on Ubuntu 18.04/20.04 aarch64-linux. gdb/ChangeLog 2021-01-19 Luis Machado <luis.machado@linaro.org> * frame.h (get_frame_register_bytes): Pass a gdb::array_view instead of buffer + length. (put_frame_register_bytes): Likewise. Adjust documentation. (get_frame_memory): Pass a gdb::array_view instead of buffer + length. (safe_frame_unwind_memory): Likewise. * frame.c (get_frame_register_bytes, put_frame_register_bytes) (get_frame_memory, safe_frame_unwind_memory): Adjust to use gdb::array_view. * amd64-fbsd-tdep.c (amd64fbsd_sigtramp_p): Likewise. * amd64-linux-tdep.c (amd64_linux_sigtramp_start): Likewise. * amd64-obsd-tdep.c (amd64obsd_sigtramp_p): Likewise. * arc-linux-tdep.c (arc_linux_is_sigtramp): Likewise. * cris-tdep.c (cris_sigtramp_start, cris_rt_sigtramp_start): Likewise. * dwarf2/loc.c (rw_pieced_value): Likewise. * hppa-tdep.c (hppa_frame_cache): Likewise. * i386-fbsd-tdep.c (i386fbsd_sigtramp_p): Likewise. * i386-gnu-tdep.c (i386_gnu_sigtramp_start): Likewise. * i386-linux-tdep.c (i386_linux_sigtramp_start) (i386_linux_rt_sigtramp_start): Likewise. * i386-obsd-tdep.c (i386obsd_sigtramp_p): Likewise. * i386-tdep.c (i386_register_to_value): Likewise. * i387-tdep.c (i387_register_to_value): Likewise. * ia64-tdep.c (ia64_register_to_value): Likewise. * m32r-linux-tdep.c (m32r_linux_sigtramp_start) (m32r_linux_rt_sigtramp_start): Likewise. * m68k-linux-tdep.c (m68k_linux_pc_in_sigtramp): Likewise. * m68k-tdep.c (m68k_register_to_value): Likewise. * mips-tdep.c (mips_register_to_value) (mips_value_to_register): Likewise. * ppc-fbsd-tdep.c (ppcfbsd_sigtramp_frame_sniffer) (ppcfbsd_sigtramp_frame_cache): Likewise. * ppc-obsd-tdep.c (ppcobsd_sigtramp_frame_sniffer) (ppcobsd_sigtramp_frame_cache): Likewise. * rs6000-tdep.c (rs6000_in_function_epilogue_frame_p) (rs6000_register_to_value): Likewise. * tilegx-tdep.c (tilegx_analyze_prologue): Likewise. * tramp-frame.c (tramp_frame_start): Likewise. * valops.c (value_assign): Likewise.
2021-01-01Update copyright year range in all GDB filesJoel Brobecker1-1/+1
This commits the result of running gdb/copyright.py as per our Start of New Year procedure... gdb/ChangeLog Update copyright year range in copyright header of all GDB files.
2020-12-23Remove trailing white spaces in gdb/frame.{c,h}Shahab Vahedi1-6/+6
gdb/ChangeLog: * frame.c: Remove trailing white spaces. * frame.h: Likewise.
2020-11-16Fix frame cycle detectionPedro Alves1-10/+17
The recent commit to make scoped_restore_current_thread's cdtors exception free regressed gdb.base/eh_return.exp: Breakpoint 1, 0x00000000004012bb in eh2 (gdb/frame.c:641: internal-error: frame_id get_frame_id(frame_info*): Assertion `stashed' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. Quit this debugging session? (y or n) FAIL: gdb.base/eh_return.exp: hit breakpoint (GDB internal error) That testcase uses __builtin_eh_return and, before the regression, the backtrace at eh2 looked like this: (gdb) bt #0 0x00000000004006eb in eh2 (p=0x4006ec <continuation>) at src/gdb/testsuite/gdb.base/eh_return.c:54 Backtrace stopped: previous frame identical to this frame (corrupt stack?) That "previous frame identical to this frame" is caught by the cycle detection based on frame id. The assertion failing is this one: 638 /* Since this is the first frame in the chain, this should 639 always succeed. */ 640 bool stashed = frame_stash_add (fi); 641 gdb_assert (stashed); originally added by commit f245535cf583ae4ca13b10d47b3c7d3334593ece Author: Pedro Alves <palves@redhat.com> AuthorDate: Mon Sep 5 18:41:38 2016 +0100 Fix PR19927: Avoid unwinder recursion if sniffer uses calls parse_and_eval The assertion is failing because frame #1's frame id was stashed before the id of frame #0 is stashed. The frame id of frame #1 was stashed here: (top-gdb) bt #0 frame_stash_add (frame=0x1e24c90) at src/gdb/frame.c:276 #1 0x0000000000669c1b in get_prev_frame_if_no_cycle (this_frame=0x19f8370) at src/gdb/frame.c:2120 #2 0x000000000066a339 in get_prev_frame_always_1 (this_frame=0x19f8370) at src/gdb/frame.c:2303 #3 0x000000000066a360 in get_prev_frame_always (this_frame=0x19f8370) at src/gdb/frame.c:2319 #4 0x000000000066b56c in get_frame_unwind_stop_reason (frame=0x19f8370) at src/gdb/frame.c:3028 #5 0x000000000059f929 in dwarf2_frame_cfa (this_frame=0x19f8370) at src/gdb/dwarf2/frame.c:1462 #6 0x00000000005ce434 in dwarf_evaluate_loc_desc::get_frame_cfa (this=0x7fffffffc070) at src/gdb/dwarf2/loc.c:666 #7 0x00000000005989a9 in dwarf_expr_context::execute_stack_op (this=0x7fffffffc070, op_ptr=0x1b2a053 "\364\003", op_end=0x1b2a053 "\364\003") at src/gdb/dwarf2/expr.c:1161 #8 0x0000000000596af6 in dwarf_expr_context::eval (this=0x7fffffffc070, addr=0x1b2a052 "\234\364\003", len=1) at src/gdb/dwarf2/expr.c:303 #9 0x0000000000597b4e in dwarf_expr_context::execute_stack_op (this=0x7fffffffc070, op_ptr=0x1b2a063 "", op_end=0x1b2a063 "") at src/gdb/dwarf2/expr.c:865 #10 0x0000000000596af6 in dwarf_expr_context::eval (this=0x7fffffffc070, addr=0x1b2a061 "\221X", len=2) at src/gdb/dwarf2/expr.c:303 #11 0x00000000005c8b5a in dwarf2_evaluate_loc_desc_full (type=0x1b564d0, frame=0x19f8370, data=0x1b2a061 "\221X", size=2, per_cu=0x1b28760, per_objfile=0x1a84930, subobj_type=0x1b564d0, subobj_byte_offset=0) at src/gdb/dwarf2/loc.c:2260 #12 0x00000000005c9243 in dwarf2_evaluate_loc_desc (type=0x1b564d0, frame=0x19f8370, data=0x1b2a061 "\221X", size=2, per_cu=0x1b28760, per_objfile=0x1a84930) at src/gdb/dwarf2/loc.c:2444 #13 0x00000000005cb769 in locexpr_read_variable (symbol=0x1b59840, frame=0x19f8370) at src/gdb/dwarf2/loc.c:3687 #14 0x0000000000663137 in language_defn::read_var_value (this=0x122ea60 <c_language_defn>, var=0x1b59840, var_block=0x0, frame=0x19f8370) at src/gdb/findvar.c:618 #15 0x0000000000663c3b in read_var_value (var=0x1b59840, var_block=0x0, frame=0x19f8370) at src/gdb/findvar.c:822 #16 0x00000000008c7d9f in read_frame_arg (fp_opts=..., sym=0x1b59840, frame=0x19f8370, argp=0x7fffffffc470, entryargp=0x7fffffffc490) at src/gdb/stack.c:542 #17 0x00000000008c89cd in print_frame_args (fp_opts=..., func=0x1b597c0, frame=0x19f8370, num=-1, stream=0x1aba860) at src/gdb/stack.c:890 #18 0x00000000008c9bf8 in print_frame (fp_opts=..., frame=0x19f8370, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at src/gdb/stack.c:1394 #19 0x00000000008c92b9 in print_frame_info (fp_opts=..., frame=0x19f8370, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at src/gdb/stack.c:1119 #20 0x00000000008c75f0 in print_stack_frame (frame=0x19f8370, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at src/gdb/stack.c:366 #21 0x000000000070250b in print_stop_location (ws=0x7fffffffc9e0) at src/gdb/infrun.c:8110 #22 0x0000000000702569 in print_stop_event (uiout=0x1a8b9e0, displays=true) at src/gdb/infrun.c:8126 #23 0x000000000096d04b in tui_on_normal_stop (bs=0x1bcd1c0, print_frame=1) at src/gdb/tui/tui-interp.c:98 ... Before the commit to make scoped_restore_current_thread's cdtors exception free, scoped_restore_current_thread's dtor would call get_frame_id on the selected frame, and we use scoped_restore_current_thread pervasively. That had the side effect of stashing the frame id of frame #0 before reaching the path shown in the backtrace. I.e., the frame id of frame #0 happened to be stashed before the frame id of frame #1. But that was by chance, not by design. This commit: commit 256ae5dbc73d1348850f86ee77a0dc3b04bc7cc0 Author: Kevin Buettner <kevinb@redhat.com> AuthorDate: Mon Oct 31 12:47:42 2016 -0700 Stash frame id of current frame before stashing frame id for previous frame Fixed a similar problem, by making sure get_prev_frame computes the frame id of the current frame before unwinding the previous frame, so that the cycle detection works properly. That fix misses the scenario we're now running against, because if you notice, the backtrace above shows that frame #4 calls get_prev_frame_always, not get_prev_frame. I.e., nothing is calling get_frame_id on the current frame. The fix here is to move Kevin's fix down from get_prev_frame to get_prev_frame_always. Or actually, a bit further down to get_prev_frame_always_1 -- note that inline_frame_this_id calls get_prev_frame_always, so we need to be careful to avoid recursion in that scenario. gdb/ChangeLog: * frame.c (get_prev_frame): Move get_frame_id call from here ... (get_prev_frame_always_1): ... to here. * inline-frame.c (inline_frame_this_id): Mention get_prev_frame_always_1 in comment. Change-Id: Id960c98ab2d072c48a436c3eb160cc4b2a5cfd1d
2020-11-02gdb, gdbserver, gdbsupport: fix leading space vs tabs issuesSimon Marchi1-6/+6
Many spots incorrectly use only spaces for indentation (for example, there are a lot of spots in ada-lang.c). I've always found it awkward when I needed to edit one of these spots: do I keep the original wrong indentation, or do I fix it? What if the lines around it are also wrong, do I fix them too? I probably don't want to fix them in the same patch, to avoid adding noise to my patch. So I propose to fix as much as possible once and for all (hopefully). One typical counter argument for this is that it makes code archeology more difficult, because git-blame will show this commit as the last change for these lines. My counter counter argument is: when git-blaming, you often need to do "blame the file at the parent commit" anyway, to go past some other refactor that touched the line you are interested in, but is not the change you are looking for. So you already need a somewhat efficient way to do this. Using some interactive tool, rather than plain git-blame, makes this trivial. For example, I use "tig blame <file>", where going back past the commit that changed the currently selected line is one keystroke. It looks like Magit in Emacs does it too (though I've never used it). Web viewers of Github and Gitlab do it too. My point is that it won't really make archeology more difficult. The other typical counter argument is that it will cause conflicts with existing patches. That's true... but it's a one time cost, and those are not conflicts that are difficult to resolve. I have also tried "git rebase --ignore-whitespace", it seems to work well. Although that will re-introduce the faulty indentation, so one needs to take care of fixing the indentation in the patch after that (which is easy). gdb/ChangeLog: * aarch64-linux-tdep.c: Fix indentation. * aarch64-ravenscar-thread.c: Fix indentation. * aarch64-tdep.c: Fix indentation. * aarch64-tdep.h: Fix indentation. * ada-lang.c: Fix indentation. * ada-lang.h: Fix indentation. * ada-tasks.c: Fix indentation. * ada-typeprint.c: Fix indentation. * ada-valprint.c: Fix indentation. * ada-varobj.c: Fix indentation. * addrmap.c: Fix indentation. * addrmap.h: Fix indentation. * agent.c: Fix indentation. * aix-thread.c: Fix indentation. * alpha-bsd-nat.c: Fix indentation. * alpha-linux-tdep.c: Fix indentation. * alpha-mdebug-tdep.c: Fix indentation. * alpha-nbsd-tdep.c: Fix indentation. * alpha-obsd-tdep.c: Fix indentation. * alpha-tdep.c: Fix indentation. * amd64-bsd-nat.c: Fix indentation. * amd64-darwin-tdep.c: Fix indentation. * amd64-linux-nat.c: Fix indentation. * amd64-linux-tdep.c: Fix indentation. * amd64-nat.c: Fix indentation. * amd64-obsd-tdep.c: Fix indentation. * amd64-tdep.c: Fix indentation. * amd64-windows-tdep.c: Fix indentation. * annotate.c: Fix indentation. * arc-tdep.c: Fix indentation. * arch-utils.c: Fix indentation. * arch/arm-get-next-pcs.c: Fix indentation. * arch/arm.c: Fix indentation. * arm-linux-nat.c: Fix indentation. * arm-linux-tdep.c: Fix indentation. * arm-nbsd-tdep.c: Fix indentation. * arm-pikeos-tdep.c: Fix indentation. * arm-tdep.c: Fix indentation. * arm-tdep.h: Fix indentation. * arm-wince-tdep.c: Fix indentation. * auto-load.c: Fix indentation. * auxv.c: Fix indentation. * avr-tdep.c: Fix indentation. * ax-gdb.c: Fix indentation. * ax-general.c: Fix indentation. * bfin-linux-tdep.c: Fix indentation. * block.c: Fix indentation. * block.h: Fix indentation. * blockframe.c: Fix indentation. * bpf-tdep.c: Fix indentation. * break-catch-sig.c: Fix indentation. * break-catch-syscall.c: Fix indentation. * break-catch-throw.c: Fix indentation. * breakpoint.c: Fix indentation. * breakpoint.h: Fix indentation. * bsd-uthread.c: Fix indentation. * btrace.c: Fix indentation. * build-id.c: Fix indentation. * buildsym-legacy.h: Fix indentation. * buildsym.c: Fix indentation. * c-typeprint.c: Fix indentation. * c-valprint.c: Fix indentation. * c-varobj.c: Fix indentation. * charset.c: Fix indentation. * cli/cli-cmds.c: Fix indentation. * cli/cli-decode.c: Fix indentation. * cli/cli-decode.h: Fix indentation. * cli/cli-script.c: Fix indentation. * cli/cli-setshow.c: Fix indentation. * coff-pe-read.c: Fix indentation. * coffread.c: Fix indentation. * compile/compile-cplus-types.c: Fix indentation. * compile/compile-object-load.c: Fix indentation. * compile/compile-object-run.c: Fix indentation. * completer.c: Fix indentation. * corefile.c: Fix indentation. * corelow.c: Fix indentation. * cp-abi.h: Fix indentation. * cp-namespace.c: Fix indentation. * cp-support.c: Fix indentation. * cp-valprint.c: Fix indentation. * cris-linux-tdep.c: Fix indentation. * cris-tdep.c: Fix indentation. * darwin-nat-info.c: Fix indentation. * darwin-nat.c: Fix indentation. * darwin-nat.h: Fix indentation. * dbxread.c: Fix indentation. * dcache.c: Fix indentation. * disasm.c: Fix indentation. * dtrace-probe.c: Fix indentation. * dwarf2/abbrev.c: Fix indentation. * dwarf2/attribute.c: Fix indentation. * dwarf2/expr.c: Fix indentation. * dwarf2/frame.c: Fix indentation. * dwarf2/index-cache.c: Fix indentation. * dwarf2/index-write.c: Fix indentation. * dwarf2/line-header.c: Fix indentation. * dwarf2/loc.c: Fix indentation. * dwarf2/macro.c: Fix indentation. * dwarf2/read.c: Fix indentation. * dwarf2/read.h: Fix indentation. * elfread.c: Fix indentation. * eval.c: Fix indentation. * event-top.c: Fix indentation. * exec.c: Fix indentation. * exec.h: Fix indentation. * expprint.c: Fix indentation. * f-lang.c: Fix indentation. * f-typeprint.c: Fix indentation. * f-valprint.c: Fix indentation. * fbsd-nat.c: Fix indentation. * fbsd-tdep.c: Fix indentation. * findvar.c: Fix indentation. * fork-child.c: Fix indentation. * frame-unwind.c: Fix indentation. * frame-unwind.h: Fix indentation. * frame.c: Fix indentation. * frv-linux-tdep.c: Fix indentation. * frv-tdep.c: Fix indentation. * frv-tdep.h: Fix indentation. * ft32-tdep.c: Fix indentation. * gcore.c: Fix indentation. * gdb_bfd.c: Fix indentation. * gdbarch.sh: Fix indentation. * gdbarch.c: Re-generate * gdbarch.h: Re-generate. * gdbcore.h: Fix indentation. * gdbthread.h: Fix indentation. * gdbtypes.c: Fix indentation. * gdbtypes.h: Fix indentation. * glibc-tdep.c: Fix indentation. * gnu-nat.c: Fix indentation. * gnu-nat.h: Fix indentation. * gnu-v2-abi.c: Fix indentation. * gnu-v3-abi.c: Fix indentation. * go32-nat.c: Fix indentation. * guile/guile-internal.h: Fix indentation. * guile/scm-cmd.c: Fix indentation. * guile/scm-frame.c: Fix indentation. * guile/scm-iterator.c: Fix indentation. * guile/scm-math.c: Fix indentation. * guile/scm-ports.c: Fix indentation. * guile/scm-pretty-print.c: Fix indentation. * guile/scm-value.c: Fix indentation. * h8300-tdep.c: Fix indentation. * hppa-linux-nat.c: Fix indentation. * hppa-linux-tdep.c: Fix indentation. * hppa-nbsd-nat.c: Fix indentation. * hppa-nbsd-tdep.c: Fix indentation. * hppa-obsd-nat.c: Fix indentation. * hppa-tdep.c: Fix indentation. * hppa-tdep.h: Fix indentation. * i386-bsd-nat.c: Fix indentation. * i386-darwin-nat.c: Fix indentation. * i386-darwin-tdep.c: Fix indentation. * i386-dicos-tdep.c: Fix indentation. * i386-gnu-nat.c: Fix indentation. * i386-linux-nat.c: Fix indentation. * i386-linux-tdep.c: Fix indentation. * i386-nto-tdep.c: Fix indentation. * i386-obsd-tdep.c: Fix indentation. * i386-sol2-nat.c: Fix indentation. * i386-tdep.c: Fix indentation. * i386-tdep.h: Fix indentation. * i386-windows-tdep.c: Fix indentation. * i387-tdep.c: Fix indentation. * i387-tdep.h: Fix indentation. * ia64-libunwind-tdep.c: Fix indentation. * ia64-libunwind-tdep.h: Fix indentation. * ia64-linux-nat.c: Fix indentation. * ia64-linux-tdep.c: Fix indentation. * ia64-tdep.c: Fix indentation. * ia64-tdep.h: Fix indentation. * ia64-vms-tdep.c: Fix indentation. * infcall.c: Fix indentation. * infcmd.c: Fix indentation. * inferior.c: Fix indentation. * infrun.c: Fix indentation. * iq2000-tdep.c: Fix indentation. * language.c: Fix indentation. * linespec.c: Fix indentation. * linux-fork.c: Fix indentation. * linux-nat.c: Fix indentation. * linux-tdep.c: Fix indentation. * linux-thread-db.c: Fix indentation. * lm32-tdep.c: Fix indentation. * m2-lang.c: Fix indentation. * m2-typeprint.c: Fix indentation. * m2-valprint.c: Fix indentation. * m32c-tdep.c: Fix indentation. * m32r-linux-tdep.c: Fix indentation. * m32r-tdep.c: Fix indentation. * m68hc11-tdep.c: Fix indentation. * m68k-bsd-nat.c: Fix indentation. * m68k-linux-nat.c: Fix indentation. * m68k-linux-tdep.c: Fix indentation. * m68k-tdep.c: Fix indentation. * machoread.c: Fix indentation. * macrocmd.c: Fix indentation. * macroexp.c: Fix indentation. * macroscope.c: Fix indentation. * macrotab.c: Fix indentation. * macrotab.h: Fix indentation. * main.c: Fix indentation. * mdebugread.c: Fix indentation. * mep-tdep.c: Fix indentation. * mi/mi-cmd-catch.c: Fix indentation. * mi/mi-cmd-disas.c: Fix indentation. * mi/mi-cmd-env.c: Fix indentation. * mi/mi-cmd-stack.c: Fix indentation. * mi/mi-cmd-var.c: Fix indentation. * mi/mi-cmds.c: Fix indentation. * mi/mi-main.c: Fix indentation. * mi/mi-parse.c: Fix indentation. * microblaze-tdep.c: Fix indentation. * minidebug.c: Fix indentation. * minsyms.c: Fix indentation. * mips-linux-nat.c: Fix indentation. * mips-linux-tdep.c: Fix indentation. * mips-nbsd-tdep.c: Fix indentation. * mips-tdep.c: Fix indentation. * mn10300-linux-tdep.c: Fix indentation. * mn10300-tdep.c: Fix indentation. * moxie-tdep.c: Fix indentation. * msp430-tdep.c: Fix indentation. * namespace.h: Fix indentation. * nat/fork-inferior.c: Fix indentation. * nat/gdb_ptrace.h: Fix indentation. * nat/linux-namespaces.c: Fix indentation. * nat/linux-osdata.c: Fix indentation. * nat/netbsd-nat.c: Fix indentation. * nat/x86-dregs.c: Fix indentation. * nbsd-nat.c: Fix indentation. * nbsd-tdep.c: Fix indentation. * nios2-linux-tdep.c: Fix indentation. * nios2-tdep.c: Fix indentation. * nto-procfs.c: Fix indentation. * nto-tdep.c: Fix indentation. * objfiles.c: Fix indentation. * objfiles.h: Fix indentation. * opencl-lang.c: Fix indentation. * or1k-tdep.c: Fix indentation. * osabi.c: Fix indentation. * osabi.h: Fix indentation. * osdata.c: Fix indentation. * p-lang.c: Fix indentation. * p-typeprint.c: Fix indentation. * p-valprint.c: Fix indentation. * parse.c: Fix indentation. * ppc-linux-nat.c: Fix indentation. * ppc-linux-tdep.c: Fix indentation. * ppc-nbsd-nat.c: Fix indentation. * ppc-nbsd-tdep.c: Fix indentation. * ppc-obsd-nat.c: Fix indentation. * ppc-ravenscar-thread.c: Fix indentation. * ppc-sysv-tdep.c: Fix indentation. * ppc64-tdep.c: Fix indentation. * printcmd.c: Fix indentation. * proc-api.c: Fix indentation. * producer.c: Fix indentation. * producer.h: Fix indentation. * prologue-value.c: Fix indentation. * prologue-value.h: Fix indentation. * psymtab.c: Fix indentation. * python/py-arch.c: Fix indentation. * python/py-bpevent.c: Fix indentation. * python/py-event.c: Fix indentation. * python/py-event.h: Fix indentation. * python/py-finishbreakpoint.c: Fix indentation. * python/py-frame.c: Fix indentation. * python/py-framefilter.c: Fix indentation. * python/py-inferior.c: Fix indentation. * python/py-infthread.c: Fix indentation. * python/py-objfile.c: Fix indentation. * python/py-prettyprint.c: Fix indentation. * python/py-registers.c: Fix indentation. * python/py-signalevent.c: Fix indentation. * python/py-stopevent.c: Fix indentation. * python/py-stopevent.h: Fix indentation. * python/py-threadevent.c: Fix indentation. * python/py-tui.c: Fix indentation. * python/py-unwind.c: Fix indentation. * python/py-value.c: Fix indentation. * python/py-xmethods.c: Fix indentation. * python/python-internal.h: Fix indentation. * python/python.c: Fix indentation. * ravenscar-thread.c: Fix indentation. * record-btrace.c: Fix indentation. * record-full.c: Fix indentation. * record.c: Fix indentation. * reggroups.c: Fix indentation. * regset.h: Fix indentation. * remote-fileio.c: Fix indentation. * remote.c: Fix indentation. * reverse.c: Fix indentation. * riscv-linux-tdep.c: Fix indentation. * riscv-ravenscar-thread.c: Fix indentation. * riscv-tdep.c: Fix indentation. * rl78-tdep.c: Fix indentation. * rs6000-aix-tdep.c: Fix indentation. * rs6000-lynx178-tdep.c: Fix indentation. * rs6000-nat.c: Fix indentation. * rs6000-tdep.c: Fix indentation. * rust-lang.c: Fix indentation. * rx-tdep.c: Fix indentation. * s12z-tdep.c: Fix indentation. * s390-linux-tdep.c: Fix indentation. * score-tdep.c: Fix indentation. * ser-base.c: Fix indentation. * ser-mingw.c: Fix indentation. * ser-uds.c: Fix indentation. * ser-unix.c: Fix indentation. * serial.c: Fix indentation. * sh-linux-tdep.c: Fix indentation. * sh-nbsd-tdep.c: Fix indentation. * sh-tdep.c: Fix indentation. * skip.c: Fix indentation. * sol-thread.c: Fix indentation. * solib-aix.c: Fix indentation. * solib-darwin.c: Fix indentation. * solib-frv.c: Fix indentation. * solib-svr4.c: Fix indentation. * solib.c: Fix indentation. * source.c: Fix indentation. * sparc-linux-tdep.c: Fix indentation. * sparc-nbsd-tdep.c: Fix indentation. * sparc-obsd-tdep.c: Fix indentation. * sparc-ravenscar-thread.c: Fix indentation. * sparc-tdep.c: Fix indentation. * sparc64-linux-tdep.c: Fix indentation. * sparc64-nbsd-tdep.c: Fix indentation. * sparc64-obsd-tdep.c: Fix indentation. * sparc64-tdep.c: Fix indentation. * stabsread.c: Fix indentation. * stack.c: Fix indentation. * stap-probe.c: Fix indentation. * stubs/ia64vms-stub.c: Fix indentation. * stubs/m32r-stub.c: Fix indentation. * stubs/m68k-stub.c: Fix indentation. * stubs/sh-stub.c: Fix indentation. * stubs/sparc-stub.c: Fix indentation. * symfile-mem.c: Fix indentation. * symfile.c: Fix indentation. * symfile.h: Fix indentation. * symmisc.c: Fix indentation. * symtab.c: Fix indentation. * symtab.h: Fix indentation. * target-float.c: Fix indentation. * target.c: Fix indentation. * target.h: Fix indentation. * tic6x-tdep.c: Fix indentation. * tilegx-linux-tdep.c: Fix indentation. * tilegx-tdep.c: Fix indentation. * top.c: Fix indentation. * tracefile-tfile.c: Fix indentation. * tracepoint.c: Fix indentation. * tui/tui-disasm.c: Fix indentation. * tui/tui-io.c: Fix indentation. * tui/tui-regs.c: Fix indentation. * tui/tui-stack.c: Fix indentation. * tui/tui-win.c: Fix indentation. * tui/tui-winsource.c: Fix indentation. * tui/tui.c: Fix indentation. * typeprint.c: Fix indentation. * ui-out.h: Fix indentation. * unittests/copy_bitwise-selftests.c: Fix indentation. * unittests/memory-map-selftests.c: Fix indentation. * utils.c: Fix indentation. * v850-tdep.c: Fix indentation. * valarith.c: Fix indentation. * valops.c: Fix indentation. * valprint.c: Fix indentation. * valprint.h: Fix indentation. * value.c: Fix indentation. * value.h: Fix indentation. * varobj.c: Fix indentation. * vax-tdep.c: Fix indentation. * windows-nat.c: Fix indentation. * windows-tdep.c: Fix indentation. * xcoffread.c: Fix indentation. * xml-syscall.c: Fix indentation. * xml-tdesc.c: Fix indentation. * xstormy16-tdep.c: Fix indentation. * xtensa-config.c: Fix indentation. * xtensa-linux-nat.c: Fix indentation. * xtensa-linux-tdep.c: Fix indentation. * xtensa-tdep.c: Fix indentation. gdbserver/ChangeLog: * ax.cc: Fix indentation. * dll.cc: Fix indentation. * inferiors.h: Fix indentation. * linux-low.cc: Fix indentation. * linux-nios2-low.cc: Fix indentation. * linux-ppc-ipa.cc: Fix indentation. * linux-ppc-low.cc: Fix indentation. * linux-x86-low.cc: Fix indentation. * linux-xtensa-low.cc: Fix indentation. * regcache.cc: Fix indentation. * server.cc: Fix indentation. * tracepoint.cc: Fix indentation. gdbsupport/ChangeLog: * common-exceptions.h: Fix indentation. * event-loop.cc: Fix indentation. * fileio.cc: Fix indentation. * filestuff.cc: Fix indentation. * gdb-dlfcn.cc: Fix indentation. * gdb_string_view.h: Fix indentation. * job-control.cc: Fix indentation. * signals.cc: Fix indentation. Change-Id: I4bad7ae6be0fbe14168b8ebafb98ffe14964a695
2020-10-30Move lookup_selected_frame to frame.cPedro Alves1-0/+66
This function is now external, and isn't really threads related. Move it to frame.c. gdb/ChangeLog: * thread.c (lookup_selected_frame): Move ... * frame.c (lookup_selected_frame): ... here. Change-Id: Ia96b79c15767337c68efd3358bcc715ce8e26c15
2020-10-30Make scoped_restore_current_thread's cdtors exception free (RFC)Pedro Alves1-24/+93
If the remote target closes while we're reading registers/memory for restoring the selected frame in scoped_restore_current_thread's dtor, the corresponding TARGET_CLOSE_ERROR error is swallowed by the scoped_restore_current_thread's dtor, because letting exceptions escape from a dtor is bad. It isn't great to lose that errors like that, though. I've been thinking about how to avoid it, and I came up with this patch. The idea here is to make scoped_restore_current_thread's dtor do as little as possible, to avoid any work that might throw in the first place. And to do that, instead of having the dtor call restore_selected_frame, which re-finds the previously selected frame, just record the frame_id/level of the desired selected frame, and have get_selected_frame find the frame the next time it is called. In effect, this implements most of Cagney's suggestion, here: /* On demand, create the selected frame and then return it. If the selected frame can not be created, this function prints then throws an error. When MESSAGE is non-NULL, use it for the error message, otherwize use a generic error message. */ /* FIXME: cagney/2002-11-28: At present, when there is no selected frame, this function always returns the current (inner most) frame. It should instead, when a thread has previously had its frame selected (but not resumed) and the frame cache invalidated, find and then return that thread's previously selected frame. */ extern struct frame_info *get_selected_frame (const char *message); The only thing missing to fully implement that would be to make reinit_frame_cache just clear selected_frame instead of calling select_frame(NULL), and the call select_frame(NULL) explicitly in the places where we really wanted reinit_frame_cache to go back to the current frame too. That can done separately, though, I'm not proposing to do that in this patch. Note that this patch renames restore_selected_frame to lookup_selected_frame, and adds a new restore_selected_frame function that doesn't throw, to be paired with the also-new save_selected_frame function. There's a restore_selected_frame function in infrun.c that I think can be replaced by the new one in frame.c. Also done in this patch is make the get_selected_frame's parameter be optional, so that we don't have to pass down nullptr explicitly all over the place. lookup_selected_frame should really move from thread.c to frame.c, but I didn't do that here, just to avoid churn in the patch while it collects comments. I did make it extern and declared it in frame.h already, preparing for the move. I will do the move as a follow up patch if people agree with this approach. Incidentally, this patch alone would fix the crashes fixed by the previous patches in the series, because with this, scoped_restore_current_thread's constructor doesn't throw either. gdb/ChangeLog: * blockframe.c (block_innermost_frame): Use get_selected_frame. * frame.c (scoped_restore_selected_frame::scoped_restore_selected_frame): Use save_selected_frame. Save language as well. (scoped_restore_selected_frame::~scoped_restore_selected_frame): Use restore_selected_frame, and restore language as well. (selected_frame_id, selected_frame_level): New. (selected_frame): Update comments. (save_selected_frame, restore_selected_frame): New. (get_selected_frame): Use lookup_selected_frame. (get_selected_frame_if_set): Delete. (select_frame): Record selected_frame_level and selected_frame_id. * frame.h (scoped_restore_selected_frame) <m_level, m_lang>: New fields. (get_selected_frame): Make 'message' parameter optional. (get_selected_frame_if_set): Delete declaration. (select_frame): Update comments. (save_selected_frame, restore_selected_frame) (lookup_selected_frame): Declare. * gdbthread.h (scoped_restore_current_thread) <m_lang>: New field. * infrun.c (struct infcall_control_state) <selected_frame_level>: New field. (save_infcall_control_state): Use save_selected_frame. (restore_selected_frame): Delete. (restore_infcall_control_state): Use restore_selected_frame. * stack.c (select_frame_command_core, frame_command_core): Use get_selected_frame. * thread.c (restore_selected_frame): Rename to ... (lookup_selected_frame): ... this and make extern. Select the current frame if the frame level is -1. (scoped_restore_current_thread::restore): Also restore the language. (scoped_restore_current_thread::~scoped_restore_current_thread): Don't try/catch. (scoped_restore_current_thread::scoped_restore_current_thread): Save the language as well. Use save_selected_frame. Change-Id: I73fd1cfc40d8513c28e5596383b7ecd8bcfe700f
2020-10-29Remove symfile_objfile macroTom Tromey1-2/+3
This removes the symfile_objfile macro, in favor of just spelling out the member access. gdb/ChangeLog 2020-10-29 Tom Tromey <tom@tromey.com> * windows-tdep.c (windows_solib_create_inferior_hook): Update. * target.c (info_target_command): Update. * symfile.c (syms_from_objfile_1, finish_new_objfile) (symbol_file_clear, reread_symbols): Update. * symfile-mem.c (add_symbol_file_from_memory_command): Update. * stabsread.c (scan_file_globals): Update. * solib.c (update_solib_list): Update. * solib-svr4.c (elf_locate_base, open_symbol_file_object) (svr4_fetch_objfile_link_map, enable_break) (svr4_relocate_main_executable) (svr4_iterate_over_objfiles_in_search_order): Update. * solib-frv.c (lm_base, enable_break) (frv_relocate_main_executable): Update. (main_got, frv_fdpic_find_canonical_descriptor): Update. (frv_fetch_objfile_link_map): Update. * solib-dsbt.c (lm_base, dsbt_relocate_main_executable): Update. * solib-darwin.c (darwin_solib_create_inferior_hook): Update. * solib-aix.c (solib_aix_solib_create_inferior_hook): Update. * remote.c (remote_target::get_offsets): Update. (remote_target::start_remote) (extended_remote_target::post_attach): Update. * objfiles.c (entry_point_address_query): Update. * nto-procfs.c (nto_procfs_target::create_inferior): Update. * minsyms.c (get_symbol_leading_char): Update. * frame.c (inside_main_func): Update. * progspace.h (symfile_objfile): Remove macro.
2020-10-19gdb/frame: remove an unused type aliasTankut Baris Aktemur1-2/+0
Tested by rebuilding. gdb/ChangeLog: 2020-10-19 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com> * frame.c: Remove the unused 'uinteger_option_def' type alias.
2020-10-11gdb: detect main function even when there's no matching msymbolAndrew Burgess1-8/+22
Currently, GDB will only stop the backtrace at the main function if there is a minimal symbol with the matching name. In Fortran programs compiled with gfortran this is not the case. The main function is present in the DWARF, and as marked as DW_AT_main_subprogram, but there's no minimal symbol. This commit extends `inside_main_func` to check the full symbols if no matching minimal symbol is found. There's an updated test case that covers this change. gdb/ChangeLog: * frame.c (inside_main_func): Check full symbols as well as minimal symbols. gdb/testsuite/ChangeLog: * gdb.fortran/mixed-lang-stack.exp (run_tests): Update expected output of backtrace.
2020-09-28Remove target_has_registers macroTom Tromey1-2/+3
This removes the target_has_registers object-like macro, replacing it with the underlying function. gdb/ChangeLog 2020-09-28 Tom Tromey <tom@tromey.com> * tui/tui-regs.c (tui_get_register) (tui_data_window::show_registers): Update. * thread.c (scoped_restore_current_thread::restore) (scoped_restore_current_thread::scoped_restore_current_thread): Update. * regcache-dump.c (regcache_print): Update. * python/py-finishbreakpoint.c (bpfinishpy_detect_out_scope_cb): Update. * mi/mi-main.c (mi_cmd_data_write_register_values): Update. * mep-tdep.c (current_me_module, current_options): Update. * linux-thread-db.c (thread_db_load): Update. * infcmd.c (registers_info, info_vector_command) (info_float_command): Update. * ia64-tdep.c (ia64_frame_prev_register) (ia64_sigtramp_frame_prev_register): Update. * ia64-libunwind-tdep.c (libunwind_frame_prev_register): Update. * gcore.c (derive_stack_segment): Update. * frame.c (get_current_frame, has_stack_frames): Update. * findvar.c (language_defn::read_var_value): Update. * arm-tdep.c (arm_pc_is_thumb): Update. * target.c (target_has_registers): Rename from target_has_registers_1. * target.h (target_has_registers): Remove macro. (target_has_registers): Rename from target_has_registers_1.
2020-09-28Remove target_has_stack macroTom Tromey1-2/+2
This removes the target_has_stack object-like macro, replacing it with the underlying function. gdb/ChangeLog 2020-09-28 Tom Tromey <tom@tromey.com> * windows-tdep.c (tlb_make_value): Update. * tui/tui-regs.c (tui_data_window::show_registers): Update. * thread.c (scoped_restore_current_thread::restore) (scoped_restore_current_thread::scoped_restore_current_thread) (thread_command): Update. * stack.c (backtrace_command_1, frame_apply_level_command) (frame_apply_all_command, frame_apply_command): Update. * infrun.c (siginfo_make_value, restore_infcall_control_state): Update. * gcore.c (derive_stack_segment): Update. * frame.c (get_current_frame, has_stack_frames): Update. * auxv.c (info_auxv_command): Update. * ada-tasks.c (ada_build_task_list): Update. * target.c (target_has_stack): Rename from target_has_stack_1. * target.h (target_has_stack): Remove macro. (target_has_stack): Rename from target_has_stack_1.
2020-09-28Remove target_has_memory macroTom Tromey1-2/+2
This removes the target_has_memory object-like macro, replacing it with the underlying function. gdb/ChangeLog 2020-09-28 Tom Tromey <tom@tromey.com> * target.c (target_has_memory): Rename from target_has_memory_1. * tui/tui-regs.c (tui_data_window::show_registers): Update. * thread.c (scoped_restore_current_thread::restore) (scoped_restore_current_thread::scoped_restore_current_thread): Update. * frame.c (get_current_frame, has_stack_frames): Update. * target.h (target_has_memory): Remove macro. (target_has_memory): Rename from target_has_memory_1.
2020-08-31gdb: fix nits in previous patchesSimon Marchi1-1/+1
I forgot to fix some nits pointed out in review before merging the "frame inlined in outer frame series", this patch fixes them. gdb/ChangeLog: * frame-unwind.h (frame_prev_register_ftype): Fix adjective ordering in comment. * frame.c (frame_id_eq): Fix indentation. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-reg-undefined.exp: Remove spurious #. Change-Id: Iaddde9677fc3f68382558d1a16f5a0b4beb78bac
2020-08-31gdb: introduce explicit outer frame id kindSimon Marchi1-14/+5
In the following patch, we'll need to easily differentiate the frame_id of the outer frame (or the frame id of a frame inlined into the outer frame) from a simply invalid frame id. Currently, the frame id of the outer frame has `stack_status` set to FID_STACK_INVALID plus special_addr_p set. A frame inlined into the outer frame would also have `artificial_depth` set to greater than one. That makes the job of differntiating the frame id of the outer frame (or a frame inlined into the outer frame) cumbersome. To make it easier, give the outer frame id its own frame_id_stack_status enum value. outer_frame_id then becomes very similar to sentinel_frame_id, another "special" frame id value. In frame_id_p, we don't need a special case for the outer frame id, as it's no long a special case of FID_STACK_INVALID. Same goes for frame_id_eq. So in the end, FID_STACK_OUTER isn't even used (except in fprint_frame_id). But that's expected: all the times we wanted to identify an outer frame was to differentiate it from an otherwise invalid frame. Since their frame_id_stack_status value is different now, that is done naturally. gdb/ChangeLog: * frame.h (enum frame_id_stack_status) <FID_STACK_OUTER>: New. * frame.c (fprint_frame_id): Handle FID_STACK_OUTER. (outer_frame_id): Use FID_STACK_OUTER instead of FID_STACK_INVALID. (frame_id_p): Don't check for outer_frame_id. Change-Id: I654e7f936349debc4f04f7f684b15e71a0c37619
2020-08-31gdb: make frame_unwind_got_optimized return a not_lval valueSimon Marchi1-1/+1
TLDR: frame_unwind_got_optimized uses wrong frame id value, trying to fix it makes GDB sad, return not_lval value and don't use frame id value instead. Longer version: The `prev_register` method of the `frame_unwind` interface corresponds to asking the question: "where did this frame - passed as a parameter - save the value this register had in its caller frame?". When "this frame" did not save that register value (DW_CFA_undefined in DWARF), the implementation can use the `frame_unwind_got_optimized` function to create a struct value that represents the optimized out / not saved register. `frame_unwind_got_optimized` marks the value as fully optimized out, sets the lval field to lval_register and assigns the required data for lval_register: the next frame id and the register number. The problem is that it uses the frame id from the wrong frame (see below for in depth explanation). In practice, this is not problematic because the frame id is never used: the value is already not lazy (and is marked as optimized out), so the value is never fetched from the target. When trying to change it to put the right next frame id in the value, we bump into problems: computing the frame id for some frame requires unwinding some register, if that register is not saved / optimized out, we try to get the frame id that we are currently computing. This patch addresses the problem by changing `frame_unwind_got_optimized` to return a not_lval value instead. Doing so, we don't need to put a frame id, so we don't hit that problem. It may seem like an unnecessary change today, because it looks like we're fixing something that is not broken (from the user point of view). However, the bug becomes user visible with the following patches, where inline frames are involved. I put this change in its own patch to keep it logically separate. Let's now illustrate how we are putting the wrong frame id in the value returned by `frame_unwind_got_optimized`. Let's assume this stack: frame #0 frame #1 frame #2 frame #3 Let's suppose that we are calling `frame_unwind_register_value` with frame #2 as the "next_frame" parameter and some register number X as the regnum parameter. That is like asking the question "where did frame #2 save frame #3's value for register X". `frame_unwind_register_value` calls the frame unwinder's `prev_register` method, which in our case is `dwarf2_frame_prev_register`. Note that in `dwarf2_frame_prev_register`, the parameter is now called `this_frame`, but its value is still frame #2, and we are still looking for where frame #2 saved frame #3's value of register X. Let's now suppose that frame #2's CFI explicitly indicates that the register X is was not saved (DW_CFA_undefined). We go into `frame_unwind_got_optimized`. In `frame_unwind_got_optimized`, the intent is to create a value that represents register X in frame #3. An lval_register value requires that we specify the id of the _next_ frame, that is the frame from which we would need to unwind in order to get the value. Therefore, we would want to put the id of frame #2 in there. However, `frame_unwind_got_optimized` does: VALUE_NEXT_FRAME_ID (val) = get_frame_id (get_next_frame_sentinel_okay (frame)); where `frame` is frame #2. The get_next_frame_sentinel_okay call returns frame #1, so we end up putting frame #1's id in the value. Let's now pretend that we try to "fix" it by placing the right frame id, in other words doing this change: --- a/gdb/frame-unwind.c +++ b/gdb/frame-unwind.c @@ -260,8 +260,7 @@ frame_unwind_got_optimized (struct frame_info *frame, int regnum) mark_value_bytes_optimized_out (val, 0, TYPE_LENGTH (type)); VALUE_LVAL (val) = lval_register; VALUE_REGNUM (val) = regnum; - VALUE_NEXT_FRAME_ID (val) - = get_frame_id (get_next_frame_sentinel_okay (frame)); + VALUE_NEXT_FRAME_ID (val) = get_frame_id (frame); return val; } This makes some tests fails, such as gdb.dwarf2/dw2-undefined-ret-addr.exp, like so: ... #9 0x0000557a8ab15a5d in internal_error (file=0x557a8b31ef80 "/home/simark/src/binutils-gdb/gdb/frame.c", line=623, fmt=0x557a8b31efe0 "%s: Assertion `%s' failed.") at /home/simark/src/binutils-gdb/gdbsupport/errors.cc:55 #10 0x0000557a87f816d6 in get_frame_id (fi=0x62100034bde0) at /home/simark/src/binutils-gdb/gdb/frame.c:623 #11 0x0000557a87f7cac7 in frame_unwind_got_optimized (frame=0x62100034bde0, regnum=16) at /home/simark/src/binutils-gdb/gdb/frame-unwind.c:264 #12 0x0000557a87a71a76 in dwarf2_frame_prev_register (this_frame=0x62100034bde0, this_cache=0x62100034bdf8, regnum=16) at /home/simark/src/binutils-gdb/gdb/dwarf2/frame.c:1267 #13 0x0000557a87f86621 in frame_unwind_register_value (next_frame=0x62100034bde0, regnum=16) at /home/simark/src/binutils-gdb/gdb/frame.c:1288 #14 0x0000557a87f855d5 in frame_register_unwind (next_frame=0x62100034bde0, regnum=16, optimizedp=0x7fff5f459070, unavailablep=0x7fff5f459080, lvalp=0x7fff5f4590a0, addrp=0x7fff5f4590b0, realnump=0x7fff5f459090, bufferp=0x7fff5f459150 "") at /home/simark/src/binutils-gdb/gdb/frame.c:1191 #15 0x0000557a87f860ef in frame_unwind_register (next_frame=0x62100034bde0, regnum=16, buf=0x7fff5f459150 "") at /home/simark/src/binutils-gdb/gdb/frame.c:1247 #16 0x0000557a881875f9 in i386_unwind_pc (gdbarch=0x621000190110, next_frame=0x62100034bde0) at /home/simark/src/binutils-gdb/gdb/i386-tdep.c:1971 #17 0x0000557a87fe58a5 in gdbarch_unwind_pc (gdbarch=0x621000190110, next_frame=0x62100034bde0) at /home/simark/src/binutils-gdb/gdb/gdbarch.c:3062 #18 0x0000557a87a6267b in dwarf2_tailcall_sniffer_first (this_frame=0x62100034bde0, tailcall_cachep=0x62100034bee0, entry_cfa_sp_offsetp=0x7fff5f4593f0) at /home/simark/src/binutils-gdb/gdb/dwarf2/frame-tailcall.c:387 #19 0x0000557a87a70cdf in dwarf2_frame_cache (this_frame=0x62100034bde0, this_cache=0x62100034bdf8) at /home/simark/src/binutils-gdb/gdb/dwarf2/frame.c:1198 #20 0x0000557a87a711c2 in dwarf2_frame_this_id (this_frame=0x62100034bde0, this_cache=0x62100034bdf8, this_id=0x62100034be40) at /home/simark/src/binutils-gdb/gdb/dwarf2/frame.c:1226 #21 0x0000557a87f81167 in compute_frame_id (fi=0x62100034bde0) at /home/simark/src/binutils-gdb/gdb/frame.c:587 #22 0x0000557a87f81803 in get_frame_id (fi=0x62100034bde0) at /home/simark/src/binutils-gdb/gdb/frame.c:635 #23 0x0000557a87f7efef in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7fff5f459920) at /home/simark/src/binutils-gdb/gdb/frame.c:320 #24 0x0000557a891488ae in print_frame_args (fp_opts=..., func=0x621000183b90, frame=0x62100034bde0, num=-1, stream=0x6030000caa20) at /home/simark/src/binutils-gdb/gdb/stack.c:750 #25 0x0000557a8914e87a in print_frame (fp_opts=..., frame=0x62100034bde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/simark/src/binutils-gdb/gdb/stack.c:1394 #26 0x0000557a8914c2ae in print_frame_info (fp_opts=..., frame=0x62100034bde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/simark/src/binutils-gdb/gdb/stack.c:1119 ... We end up calling get_frame_id (in the hunk above, frame #10) while we are computing it (frame #21), and that's not good. Now, the question is how do we fix this. I suggest making the unwinder return a not_lval value in this case. The reason why we return an lval_register here is to make sure that this is printed as "not saved" and not "optimized out" down the line. See these two commits: 1. 901461f8eb40 ("Print registers not saved in the frame as "<not saved>" instead of "<optimized out>"."). 2. 6bd273ae450b ("Make "set debug frame 1" output print <not saved> instead of <optimized out>.") The current design (introduced by the first commit) is to check the value's lval to choose which one to print (see val_print_optimized_out). Making the unwinder return not_lval instead of lval_register doesn't break "not saved" when doing "print $rax" or "info registers", because value_fetch_lazy_register only consumes the contents and optimized-out property from the value the unwinder returned. The value being un-lazified stays an lval_register. I believe that this is a correct technical solution (and not just papering over the problem), because what we expect of unwinders is to tell us where a given register's value is saved. If the value is saved in memory, -> lval_memory. If the value is saved in some other register of the next frame, -> lval_register. If the value is not saved, it doesn't really make sense to return an lval_register value. not_lval would be more appropriate. If the code then wants to represent an optimized out register value (like value_fetch_lazy_register does), then it's a separate concern which shouldn't involve the unwinder. This change breaks the output of "set debug frame 1" though (introduced by the second commit), since that logging statement consumes the return value of the unwinder directly. To keep the correct behavior, just make `frame_unwind_register_value` call `val_print_not_saved` directly, instead of `val_print_optimized_out`. This is fine because we know in this context that we are always talking about a register value, and that we want to show "not saved" for those. I augmented the gdb.dwarf2/dw2-reg-undefined.exp test case to test some cases I stumbled on while working on this, which I think are not tested anywhere: - the "set debug frame 1" debug output mentioned above. It's just debug output, but if we want to make sure it doesn't change, it should be tested - printing not-saved register values from the history (should print not saved) - copying a not-saved register value in a convenience variable. In this case, we expect that printing the convenience variable shows "optimized out", because we copied the value, not the property of where the value came from. gdb/ChangeLog: * frame-unwind.c (frame_unwind_got_optimized): Don't set regnum/frame in value. Call allocate_value_lazy. * frame.c (frame_unwind_register_value): Use val_print_not_saved. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-reg-undefined.exp: Test "set debug frame 1" output, printing a "not saved" value from history and printing a convenience variable created from a "not saved" value. Change-Id: If451739a3ef7a5b453b1f50707e21ce16d74807e
2020-08-22gdb: assert that we don't try to get a frame's id while it is computedSimon Marchi1-25/+72
I'm dealing these days with a class of bugs that involve trying to get a certain frame's id while we are in the process of computing it. In other words, compute_frame_id being called for a frame, eventually calling get_frame_id for that same frame. I don't think this is ever supposed to happen, as that creates a cyclic dependency. Usually, these problems cause some failure down the line. I'm proposing with this patch to catch them as early as possible, as soon as the situation described above happens. I think that helps because the failed assertion will be closer to the root of the problem. To do so, the patch changes the frame_info::this_id::p flag from a boolean (is the frame id computed or not) to a tri-state: - the frame id is not computed - the frame id is being computed - the frame id is computed Then, we can properly assert that get_frame_id doesn't get called for a frame whose id is being computed. To illustrate how that can help, let's imagine we apply the following change to frame_unwind_got_optimized: --- a/gdb/frame-unwind.c +++ b/gdb/frame-unwind.c @@ -260,8 +260,7 @@ frame_unwind_got_optimized (struct frame_info *frame, int regnum) mark_value_bytes_optimized_out (val, 0, TYPE_LENGTH (type)); VALUE_LVAL (val) = lval_register; VALUE_REGNUM (val) = regnum; - VALUE_NEXT_FRAME_ID (val) - = get_frame_id (get_next_frame_sentinel_okay (frame)); + VALUE_NEXT_FRAME_ID (val) = get_frame_id (frame); return val; } ... and run the following command, which leads to a failed assertion (you need to run the corresponding test to generate the binary first): $ ./gdb -q -nx testsuite/outputs/gdb.dwarf2/dw2-undefined-ret-addr/dw2-undefined-ret-addr -ex "b stop_frame" -ex r Without this patch applied, we catch the issue indirectly, when the top-level get_frame_id tries to stash the frame: /home/smarchi/src/binutils-gdb/gdb/frame.c:593: internal-error: frame_id get_frame_id(frame_info*): Assertion `stashed' failed. ... #9 0x0000000001af1c3a in internal_error (file=0x1cea060 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=593, fmt=0x1ce9f80 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55 #10 0x0000000000e9b413 in get_frame_id (fi=0x6210005105e0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:593 #11 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7fff1d8b9760) at /home/smarchi/src/binutils-gdb/gdb/frame.c:308 #12 0x000000000149a261 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x6210005105e0, num=-1, stream=0x60300008a580) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750 #13 0x000000000149d938 in print_frame (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394 #14 0x000000000149c0c8 in print_frame_info (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119 #15 0x0000000001498100 in print_stack_frame (frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366 #16 0x00000000010234b7 in print_stop_location (ws=0x7fff1d8ba1f0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366 #17 0x000000000102362d in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382 ... It freaks out because the frame is already in the stash: it was added by an inner call to get_frame_id, called indirectly by compute_frame_id. Debugging this failure is difficult because we have to backtrack to where this happened. With the patch applied, we catch the issue earlier, here: /home/smarchi/src/binutils-gdb/gdb/frame.c:601: internal-error: frame_id get_frame_id(frame_info*): Assertion `fi->this_id.p != frame_id_status::COMPUTING' failed ... #9 0x0000000001af22bc in internal_error (file=0x1cea6e0 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=601, fmt=0x1cea600 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55 #10 0x0000000000e9b7e3 in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:601 #11 0x0000000000e989b3 in frame_unwind_got_optimized (frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame-unwind.c:264 #12 0x0000000000cbe386 in dwarf2_frame_prev_register (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1267 #13 0x0000000000e9f569 in frame_unwind_register_value (next_frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame.c:1266 #14 0x0000000000e9eaab in frame_register_unwind (next_frame=0x62100050dde0, regnum=16, optimizedp=0x7ffca814ade0, unavailablep=0x7ffca814adf0, lvalp=0x7ffca814ae10, addrp=0x7ffca814ae20, realnump=0x7ffca814ae00, bufferp=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1169 #15 0x0000000000e9f233 in frame_unwind_register (next_frame=0x62100050dde0, regnum=16, buf=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1225 #16 0x0000000000f84262 in i386_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/i386-tdep.c:1969 #17 0x0000000000ec95dd in gdbarch_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/gdbarch.c:3062 #18 0x0000000000cb5e9d in dwarf2_tailcall_sniffer_first (this_frame=0x62100050dde0, tailcall_cachep=0x62100050dee0, entry_cfa_sp_offsetp=0x7ffca814b160) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame-tailcall.c:387 #19 0x0000000000cbdd38 in dwarf2_frame_cache (this_frame=0x62100050dde0, this_cache=0x62100050ddf8) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1198 #20 0x0000000000cbe026 in dwarf2_frame_this_id (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, this_id=0x62100050de40) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1226 #21 0x0000000000e9b447 in compute_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:580 #22 0x0000000000e9b89e in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:613 #23 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7ffca814b610) at /home/smarchi/src/binutils-gdb/gdb/frame.c:315 #24 0x000000000149a8e3 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x62100050dde0, num=-1, stream=0x60300008a520) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750 #25 0x000000000149dfba in print_frame (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394 #26 0x000000000149c74a in print_frame_info (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119 #27 0x0000000001498782 in print_stack_frame (frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366 #28 0x0000000001023b39 in print_stop_location (ws=0x7ffca814c0a0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366 #29 0x0000000001023caf in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382 ... Now, we can clearly see that get_frame_id for frame `fi=0x62100050dde0` gets called while compute_frame_id is active for that frame. The backtrace is more helpful to identify the root of the problem. gdb/ChangeLog: * frame.c (enum class frame_id_status): New. (struct frame_info) <this_id::p>: Change type to frame_id_status. (fprintf_frame): Update. (compute_frame_id): Set frame id status to "computing" on entry. Set it back to "not_computed" on failure and to "computed" on success. (get_frame_id): Assert the frame id is not being computed. (create_sentinel_frame): Use frame_id_status::COMPUTED. (create_new_frame): Likewise. (frame_cleanup_after_sniffer): Update assert. Change-Id: I5f1a25fafe045f756bd75f358892720b30ed20c9
2020-08-04gdb: use bool in frame codeSimon Marchi1-109/+113
Change instances of int variables and return values used as boolean values to use the bool type. Shorten the comments of a few functions, because I think they go a bit too much in implementation details, which appear out of date anyway. Make other misc changes to the functions that are already being changed, such as using nullptr instead of NULL, dropping `struct` keywords and declaring variables when first used. gdb/ChangeLog: * frame.h (frame_id_p): Return bool. (frame_id_artificial_p): Return bool. (frame_id_eq): Return bool. (has_stack_frames): Return bool. (get_selected_frame): Fix typo in comment. (get_frame_pc_if_available): Return bool. (get_frame_address_in_block_if_available): Return bool. (get_frame_func_if_available): Return bool. (read_frame_register_unsigned): Return bool. (get_frame_register_bytes): Return bool. (safe_frame_unwind_memory): Return bool. (deprecated_frame_register_read): Return bool. (frame_unwinder_is): Return bool. * frame.c (struct frame_info) <prev_arch::p>: Change type to bool. <this_id::p>: Likewise. <prev_p>: Likewise. (frame_stash_add): Return bool. (get_frame_id): Use bool. (frame_id_build_special) Use bool. (frame_id_build_unavailable_stack): Use bool. (frame_id_build): Use bool. (frame_id_p): Return bool, use true/false instead of 1/0. (frame_id_artificial_p): Likewise. (frame_id_eq): Likewise. (frame_id_inner): Likewise. (get_frame_func_if_available): Likewise. (read_frame_register_unsigned): Likewise. (deprecated_frame_register_read): Likewise. (get_frame_register_bytes): Likewise. (has_stack_frames): Likewise. (inside_main_func): Likewise. (inside_entry_func): Likewise. (get_frame_pc_if_available): Likewise. (get_frame_address_in_block_if_available): Likewise. (frame_unwinder_is): Likewise. (safe_frame_unwind_memory): Likewise. (frame_unwind_arch): Likewise. Change-Id: I6121fa56739b688be79d73d087d76b268ba5a46a
2020-08-04gdb: change frame_info::prev_func::p type to cached_copy_statusSimon Marchi1-8/+10
One might think that variable `frame_info::prev_func::p` is a simple true/false value, but that's not the case, it can also have the value -1 to mean "unavaiable". Change it to use the `cached_copy_status` enum, which seems designed exactly for this purpose. Rename to `status` to be consistent with `prev_pc::status` (and be cause `p` means `predicate`, which implies boolean, which this is not). gdb/ChangeLog: * frame.c (frame_info) <prev_func> <p>: Rename to status, change type to cached_copy_status. (fprintf_frame): Adjust. (get_frame_func_if_available): Adjust. (frame_cleanup_after_sniffer): Adjust. Change-Id: I50c6ebef6c0acb076e25c741f7f417bfd101d953
2020-07-23Don't touch frame_info objects if frame cache was reinitializedPedro Alves1-2/+20
This fixes yet another bug exposed by ASAN + multi-target.exp Running an Asan-enabled GDB against gdb.multi/multi-target.exp exposed yet another latent GDB bug. See here for the full log: https://sourceware.org/pipermail/gdb-patches/2020-July/170761.html As Simon described, the problem is: - We create a new frame_info object in restore_selected_frame (by calling find_relative_frame) - The frame is allocated on the frame_cache_obstack - In frame_unwind_try_unwinder, we try to find an unwinder for that frame - While trying unwinders, memory read fails because the remote target closes, because of "monitor exit" - That calls reinit_frame_cache (as shown above), which resets frame_cache_obstack - When handling the exception in frame_unwind_try_unwinder, we try to set some things on the frame_info object (like *this_cache, which in fact tries to write into frame_info::prologue_cache), but the frame_info object is no more, it went away with the obstack. Fix this by maintaining a frame cache generation counter. Then in exception handling code paths, don't touch frame objects if the generation is not the same as it was on entry. This commit generalizes the gdb.server/server-kill.exp testcase and reuses it to test the scenario in question. The new tests fail without the GDB fix. gdb/ChangeLog: * frame-unwind.c (frame_unwind_try_unwinder): On exception, don't touch THIS_CACHE/THIS_FRAME if the frame cache was cleared meanwhile. * frame.c (frame_cache_generation, get_frame_cache_generation): New. (reinit_frame_cache): Increment FRAME_CACHE_GENERATION. (get_prev_frame_if_no_cycle): On exception, don't touch PREV_FRAME/THIS_FRAME if the frame cache was cleared meanwhile. * frame.h (get_frame_cache_generation): Declare. gdb/testsuite/ChangeLog: * gdb.server/server-kill.exp (prepare): New, factored out from the top level. (kill_server): New. (test_tstatus, test_unwind_nosyms, test_unwind_syms): New. (top level) : Call test_tstatus, test_unwind_nosyms, test_unwind_syms.
2020-07-06gdb: Python unwinders, inline frames, and tail-call framesAndrew Burgess1-8/+0
This started with me running into the bug described in python/22748, in summary, if the frame sniffing code accessed any registers within an inline frame then GDB would crash with this error: gdb/frame.c:579: internal-error: frame_id get_frame_id(frame_info*): Assertion `fi->level == 0' failed. The problem is that, when in the Python unwinder I write this: pending_frame.read_register ("register-name") This is translated internally into a call to `value_of_register', which in turn becomes a call to `value_of_register_lazy'. Usually this isn't a problem, `value_of_register_lazy' requires the next frame (more inner) to have a valid frame_id, which will be the case (if we're sniffing frame #1, then frame #0 will have had its frame-id figured out). Unfortunately if frame #0 is inline within frame #1, then the frame-id for frame #0 can't be computed until we have the frame-id for #1. As a result we can't create a lazy register for frame #1 when frame #0 is inline. Initially I proposed a solution inline with that proposed in bugzilla, changing value_of_register to avoid creating a lazy register value. However, when this was discussed on the mailing list I got this reply: https://sourceware.org/pipermail/gdb-patches/2020-June/169633.html Which led me to look at these two patches: [1] https://sourceware.org/pipermail/gdb-patches/2020-April/167612.html [2] https://sourceware.org/pipermail/gdb-patches/2020-April/167930.html When I considered patches [1] and [2] I saw that all of the issues being addressed here were related, and that there was a single solution that could address all of these issues. First I wrote the new test gdb.opt/inline-frame-tailcall.exp, which shows that [1] and [2] regress the inline tail-call unwinder, the reason for this is that these two patches replace a call to gdbarch_unwind_pc with a call to get_frame_register, however, this is not correct. The previous call to gdbarch_unwind_pc takes THIS_FRAME and returns the $pc value in the previous frame. In contrast get_frame_register takes THIS_FRAME and returns the value of the $pc in THIS_FRAME; these calls are not equivalent. The reason these patches appear (or do) fix the regressions listed in [1] is that the tail call sniffer depends on identifying the address of a caller and a callee, GDB then looks for a tail-call sequence that takes us from the caller address to the callee, if such a series is found then tail-call frames are added. The bug that was being hit, and which was address in patch [1] is that in order to find the address of the caller, GDB ended up creating a lazy register value for an inline frame with to frame-id. The solution in patch [1] is to instead take the address of the callee and treat this as the address of the caller. Getting the address of the callee works, but we then end up looking for a tail-call series from the callee to the callee, which obviously doesn't return any sane results, so we don't insert any tail call frames. The original patch [1] did cause some breakage, so patch [2] undid patch [1] in all cases except those where we had an inline frame with no frame-id. It just so happens that there were no tests that fitted this description _and_ which required tail-call frames to be successfully spotted, as a result patch [2] appeared to work. The new test inline-frame-tailcall.exp, exposes the flaw in patch [2]. This commit undoes patch [1] and [2], and replaces them with a new solution, which is also different to the solution proposed in the python/22748 bug report. In this solution I propose that we introduce some special case logic to value_of_register_lazy. To understand what this logic is we must first look at how inline frames unwind registers, this is very simple, they do this: static struct value * inline_frame_prev_register (struct frame_info *this_frame, void **this_cache, int regnum) { return get_frame_register_value (this_frame, regnum); } And remember: struct value * get_frame_register_value (struct frame_info *frame, int regnum) { return frame_unwind_register_value (frame->next, regnum); } So in all cases, unwinding a register in an inline frame just asks the next frame to unwind the register, this makes sense, as an inline frame doesn't really exist, when we unwind a register in an inline frame, we're really just asking the next frame for the value of the register in the previous, non-inline frame. So, if we assume that we only get into the missing frame-id situation when we try to unwind a register from an inline frame during the frame sniffing process, then we can change value_of_register_lazy to not create lazy register values for an inline frame. Imagine this stack setup, where #1 is inline within #2. #3 -> #2 -> #1 -> #0 \______/ inline Now when trying to figure out the frame-id for #1, we need to compute the frame-id for #2. If the frame sniffer for #2 causes a lazy register read in #2, either due to a Python Unwinder, or for the tail-call sniffer, then we call value_of_register_lazy passing in frame #2. In value_of_register_lazy, we grab the next frame, which is #1, and we used to then ask for the frame-id of #1, which was not computed, and this was our bug. Now, I propose we spot that #1 is an inline frame, and so lookup the next frame of #1, which is #0. As #0 is not inline it will have a valid frame-id, and so we create a lazy register value using #0 as the next-frame-id. This will give us the exact same result we had previously (thanks to the code we inspected above). Encoding into value_of_register_lazy the knowledge that reading an inline frame register will always just forward to the next frame feels.... not ideal, but this seems like the cleanest solution to this recursive frame-id computation/sniffing issue that appears to crop up. The following two commits are fully reverted with this commit, these correspond to patches [1] and [2] respectively: commit 5939967b355ba6a940887d19847b7893a4506067 Date: Tue Apr 14 17:26:22 2020 -0300 Fix inline frame unwinding breakage commit 991a3e2e9944a4b3a27bd989ac03c18285bd545d Date: Sat Apr 25 00:32:44 2020 -0300 Fix remaining inline/tailcall unwinding breakage for x86_64 gdb/ChangeLog: PR python/22748 * dwarf2/frame-tailcall.c (dwarf2_tailcall_sniffer_first): Remove special handling for inline frames. * findvar.c (value_of_register_lazy): Skip inline frames when creating lazy register values. * frame.c (frame_id_computed_p): Delete definition. * frame.h (frame_id_computed_p): Delete declaration. gdb/testsuite/ChangeLog: PR python/22748 * gdb.opt/inline-frame-tailcall.c: New file. * gdb.opt/inline-frame-tailcall.exp: New file. * gdb.python/py-unwind-inline.c: New file. * gdb.python/py-unwind-inline.exp: New file. * gdb.python/py-unwind-inline.py: New file.
2020-04-27Fix remaining inline/tailcall unwinding breakage for x86_64Luis Machado1-0/+8
Commit 5939967b355ba6a940887d19847b7893a4506067 fixed inline frame unwinding breakage for some targets (aarch64, riscv, s390...) but regressed a few amd64 testcases related to tailcalls. Given the following example situation... Frame #-1 - sentinel frame Frame # 0 - inline frame Frame # 1 - normal frame ... suppose we're at level #1 and call into dwarf2_tailcall_sniffer_first. We'll attempt to fetch PC, which used to be done via the gdbarch_unwind_pc call (before 5939967b355ba6a940887d19847b7893a4506067), but now it is being handled by the get_frame_register function. gdbarch_unwind_pc will attempt to use frame #1's cache to retrieve information about the PC. Here's where different architectures behave differently. x86_64 will find a dwarf rule to retrieve PC from memory, at a CFA + offset location. So the PC value is readily available and there is no need to create a lazy value. For aarch64 (and others), GCC doesn't emit an explicit location for PC, so we eventually will find that PC is DWARF2_FRAME_REG_UNSPECIFIED. This is known and is handled by GDB by assuming GCC really meant DWARF2_FRAME_REG_SAME_VALUE. This means we'll attempt to fetch the register value from frame #0, via a call to frame_unwind_got_register, which will trigger the creation of a lazy value that requires a valid frame id for frame #0. We don't have a valid id for frame #0 yet, so we assert. Given the above, the following patch attempts to handle the situation without being too hacky. We verify if the next frame is an inline frame and if its frame id has been computed already. If it hasn't been computed yet, then we use the safer get_frame_register function, otherwise we use the regular gdbarch_unwind_pc hook. gdb/ChangeLog: 2020-04-27 Luis Machado <luis.machado@linaro.org> * dwarf2/frame-tailcall.c (dwarf2_tailcall_sniffer_first): Handle problematic inline frame unwinding situation. * frame.c (frame_id_computed_p): New function. * frame.h (frame_id_computed_p): New prototype.
2020-04-17Replace most calls to help_list and cmd_show_listTom Tromey1-19/+6
Currently there are many prefix commands that do nothing but call either help_list or cmd_show_list. I happened to notice that one such call, for "set print type", used the wrong command list parameter, causing incorrect output. Rather than fix this bug in isolation, I decided to eliminate this possibility by adding two new ways to add prefix commands, which simply route the call to help_list or cmd_show_list, as appropriate. This makes it impossible for a mismatch to occur. In some cases, a bit of output was removed; however, I don't think this output in general was very useful. It seemed redundant with what's already printed by help_list. A representative example is this hunk, removed from ada-lang.c: - printf_unfiltered (_(\ -"\"set ada\" must be followed by the name of a setting.\n")); This simplified the CLI style set/show commands quite a bit, and allowed the deletion of a macro. This also cleans up some unusual code in windows-tdep.c. Tested on x86-64 Fedora 30. Note that I have no way to build the go32-nat.c change. gdb/ChangeLog 2020-04-17 Tom Tromey <tromey@adacore.com> * auto-load.c (show_auto_load_cmd): Remove. (auto_load_show_cmdlist_get): Use add_show_prefix_cmd. * arc-tdep.c (_initialize_arc_tdep): Use add_show_prefix_cmd. (maintenance_print_arc_command): Remove. * tui/tui-win.c (tui_command): Remove. (tui_get_cmd_list): Use add_basic_prefix_cmd. * tui/tui-layout.c (tui_layout_command): Remove. (_initialize_tui_layout): Use add_basic_prefix_cmd. * python/python.c (user_set_python, user_show_python): Remove. (_initialize_python): Use add_basic_prefix_cmd, add_show_prefix_cmd. * guile/guile.c (set_guile_command, show_guile_command): Remove. (install_gdb_commands): Use add_basic_prefix_cmd, add_show_prefix_cmd. (info_guile_command): Remove. * dwarf2/read.c (set_dwarf_cmd, show_dwarf_cmd): Remove. (_initialize_dwarf2_read): Use add_basic_prefix_cmd, add_show_prefix_cmd. * cli/cli-style.h (class cli_style_option) <add_setshow_commands>: Remove do_set and do_show parameters. * cli/cli-style.c (set_style, show_style): Remove. (_initialize_cli_style): Use add_basic_prefix_cmd, add_show_prefix_cmd. (cli_style_option::add_setshow_commands): Remove do_set and do_show parameters. (cli_style_option::add_setshow_commands): Use add_basic_prefix_cmd, add_show_prefix_cmd. (STYLE_ADD_SETSHOW_COMMANDS): Remove macro. (set_style_name): Remove. * cli/cli-dump.c (dump_command, append_command): Remove. (srec_dump_command, ihex_dump_command, verilog_dump_command) (tekhex_dump_command, binary_dump_command) (binary_append_command): Remove. (_initialize_cli_dump): Use add_basic_prefix_cmd. * windows-tdep.c (w32_prefix_command_valid): Remove global. (init_w32_command_list): Remove; move into ... (_initialize_windows_tdep): ... here. Use add_basic_prefix_cmd. * valprint.c (set_print, show_print, set_print_raw) (show_print_raw): Remove. (_initialize_valprint): Use add_basic_prefix_cmd, add_show_prefix_cmd. * typeprint.c (set_print_type, show_print_type): Remove. (_initialize_typeprint): Use add_basic_prefix_cmd, add_show_prefix_cmd. * record.c (set_record_command, show_record_command): Remove. (_initialize_record): Use add_basic_prefix_cmd, add_show_prefix_cmd. * cli/cli-cmds.c (_initialize_cli_cmds): Use add_basic_prefix_cmd, add_show_prefix_cmd. (info_command, show_command, set_debug, show_debug): Remove. * top.h (set_history, show_history): Don't declare. * top.c (set_history, show_history): Remove. * target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd) (unset_tdesc_cmd): Remove. (_initialize_target_descriptions): Use add_basic_prefix_cmd, add_show_prefix_cmd. * symtab.c (info_module_command): Remove. (_initialize_symtab): Use add_basic_prefix_cmd. * symfile.c (overlay_command): Remove. (_initialize_symfile): Use add_basic_prefix_cmd. * sparc64-tdep.c (info_adi_command): Remove. (_initialize_sparc64_adi_tdep): Use add_basic_prefix_cmd. * sh-tdep.c (show_sh_command, set_sh_command): Remove. (_initialize_sh_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * serial.c (serial_set_cmd, serial_show_cmd): Remove. (_initialize_serial): Use add_basic_prefix_cmd, add_show_prefix_cmd. * ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Remove. (_initialize_ser_tcp): Use add_basic_prefix_cmd, add_show_prefix_cmd. * rs6000-tdep.c (set_powerpc_command, show_powerpc_command) (_initialize_rs6000_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * riscv-tdep.c (show_riscv_command, set_riscv_command) (show_debug_riscv_command, set_debug_riscv_command): Remove. (_initialize_riscv_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * remote.c (remote_command, set_remote_cmd): Remove. (_initialize_remote): Use add_basic_prefix_cmd. * record-full.c (set_record_full_command) (show_record_full_command): Remove. (_initialize_record_full): Use add_basic_prefix_cmd, add_show_prefix_cmd. * record-btrace.c (cmd_set_record_btrace) (cmd_show_record_btrace, cmd_set_record_btrace_bts) (cmd_show_record_btrace_bts, cmd_set_record_btrace_pt) (cmd_show_record_btrace_pt): Remove. (_initialize_record_btrace): Use add_basic_prefix_cmd, add_show_prefix_cmd. * ravenscar-thread.c (set_ravenscar_command) (show_ravenscar_command): Remove. (_initialize_ravenscar): Use add_basic_prefix_cmd, add_show_prefix_cmd. * mips-tdep.c (show_mips_command, set_mips_command) (_initialize_mips_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * maint.c (maintenance_command, maintenance_info_command) (maintenance_check_command, maintenance_print_command) (maintenance_set_cmd, maintenance_show_cmd): Remove. (_initialize_maint_cmds): Use add_basic_prefix_cmd, add_show_prefix_cmd. (show_per_command_cmd): Remove. * maint-test-settings.c (maintenance_set_test_settings_cmd): Remove. (maintenance_show_test_settings_cmd): Remove. (_initialize_maint_test_settings): Use add_basic_prefix_cmd, add_show_prefix_cmd. * maint-test-options.c (maintenance_test_options_command): Remove. (_initialize_maint_test_options): Use add_basic_prefix_cmd. * macrocmd.c (macro_command): Remove (_initialize_macrocmd): Use add_basic_prefix_cmd. * language.c (set_check, show_check): Remove. (_initialize_language): Use add_basic_prefix_cmd, add_show_prefix_cmd. * infcmd.c (unset_command): Remove. (_initialize_infcmd): Use add_basic_prefix_cmd. * i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Remove. (_initialize_i386_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * go32-nat.c (go32_info_dos_command): Remove. (_initialize_go32_nat): Use add_basic_prefix_cmd. * cli/cli-decode.c (do_prefix_cmd, add_basic_prefix_cmd) (do_show_prefix_cmd, add_show_prefix_cmd): New functions. * frame.c (set_backtrace_cmd, show_backtrace_cmd): Remove. (_initialize_frame): Use add_basic_prefix_cmd, add_show_prefix_cmd. * dcache.c (set_dcache_command, show_dcache_command): Remove. (_initialize_dcache): Use add_basic_prefix_cmd, add_show_prefix_cmd. * cp-support.c (maint_cplus_command): Remove. (_initialize_cp_support): Use add_basic_prefix_cmd. * btrace.c (maint_btrace_cmd, maint_btrace_set_cmd) (maint_btrace_show_cmd, maint_btrace_pt_set_cmd) (maint_btrace_pt_show_cmd, _initialize_btrace): Use add_basic_prefix_cmd, add_show_prefix_cmd. * breakpoint.c (save_command): Remove. (_initialize_breakpoint): Use add_basic_prefix_cmd. * arm-tdep.c (set_arm_command, show_arm_command): Remove. (_initialize_arm_tdep): Use add_basic_prefix_cmd, add_show_prefix_cmd. * ada-lang.c (maint_set_ada_cmd, maint_show_ada_cmd) (set_ada_command, show_ada_command): Remove. (_initialize_ada_language): Use add_basic_prefix_cmd, add_show_prefix_cmd. * command.h (add_basic_prefix_cmd, add_show_prefix_cmd): Declare. gdb/testsuite/ChangeLog 2020-04-17 Tom Tromey <tromey@adacore.com> * gdb.cp/maint.exp (test_help): Simplify multiple_help_body. Update tests. * gdb.btrace/cpu.exp: Update tests. * gdb.base/maint.exp: Update tests. * gdb.base/default.exp: Update tests. * gdb.base/completion.exp: Update tests.
2020-01-24gdb: Better frame tracking for inline framesAndrew Burgess1-4/+5
This commit improves GDB's handling of inline functions when there are more than one inline function in a stack, so for example if we have a stack like: main -> aaa -> bbb -> ccc -> ddd And aaa, bbb, and ccc are all inline within main GDB should (when given sufficient debug information) be able to step from main through aaa, bbb, and ccc. Unfortunately, this currently doesn't work, here's an example session: (gdb) start Temporary breakpoint 1 at 0x4003b0: file test.c, line 38. Starting program: /project/gdb/tests/inline/test Temporary breakpoint 1, main () at test.c:38 38 global_var = 0; (gdb) step 39 return aaa () + 1; (gdb) step aaa () at test.c:39 39 return aaa () + 1; (gdb) step bbb () at test.c:39 39 return aaa () + 1; (gdb) step ccc () at test.c:39 39 return aaa () + 1; (gdb) step ddd () at test.c:32 32 return global_var; (gdb) bt #0 ddd () at test.c:32 #1 0x00000000004003c1 in ccc () at test.c:39 #2 bbb () at test.c:26 #3 aaa () at test.c:14 #4 main () at test.c:39 Notice that once we get to line 39 in main, GDB keeps reporting line 39 in main as the location despite understanding that the inferior is stepping through the nested inline functions with each use of step. The problem is that as soon as the inferior stops we call skip_inline_frames (from inline-frame.c) which calculates the inferiors current state in relation to inline functions - it figures out if we're in an inline function, and if we are counts how many inline frames there are at the current location. So, in our example above, when we step from line 38 in main to line 39 we stop at a location that is simultaneously in all of main, aaa, bbb, and ccc. The block structure reflects the order in which the functions would be called, with ccc being the most inner block and main being the most outer block. When we stop GDB naturally finds the block for ccc, however within skip_inline_frames we spot that bbb, aaa, and main are super-blocks of the current location and that each layer represents an inline function. The skip_inline_frames then records the depth of inline functions (3 in this case for aaa, bbb, and ccc) and also the symbol of the outermost inline function (in this case 'aaa' as main isn't an inline function, it just has things inline within it). Now GDB understands the stack to be main -> aaa -> bbb -> ccc, however, the state initialised in skip_inline_frames starts off indicating that we should hide 3 frames from the user, so we report that we're in main at line 39. The location of main, line 39 is derived by asking the inline function state for the last symbol in the stack (aaa in this case), and then asking for it's location - the location of an inlined function symbol is its call site, so main, line 39 in this case. If the user then asks GDB to step we don't actually move the inferior at all, instead we spot that we are in an inline function stack, lookup the inline state data, and reduce the skip depth by 1. We then report to the user that GDB has stopped. GDB now understands that we are in 'aaa'. In order to get the precise location we again ask GDB for the last symbol from the inline data structure, and we are again told 'aaa', we then get the location from 'aaa', and report that we are in main, line 39. Hopefully it's clear what the mistake here is, once we've reduced the inline skip depth we should not be using 'aaa' to compute the precise location, instead we should be using 'bbb'. That is what this patch does. Now, when we call skip_inline_frames instead of just recording the last skipped symbol we now record all symbols in the inline frame stack. When we ask GDB for the last skipped symbol we return a symbol based on how many frames we are skipping, not just the last know symbol. With this fix in place, the same session as above now looks much better: (gdb) start Temporary breakpoint 1 at 0x4003b0: file test.c, line 38. Starting program: /project/gdb/tests/inline/test Temporary breakpoint 1, main () at test.c:38 38 global_var = 0; (gdb) s 39 return aaa () + 1; (gdb) s aaa () at test.c:14 14 return bbb () + 1; (gdb) s bbb () at test.c:26 26 return ccc () + 1; (gdb) s ccc () at test.c:20 20 return ddd () + 1; (gdb) s ddd () at test.c:32 32 return global_var; (gdb) bt #0 ddd () at test.c:32 #1 0x00000000004003c1 in ccc () at test.c:20 #2 bbb () at test.c:26 #3 aaa () at test.c:14 #4 main () at test.c:39 gdb/ChangeLog: * frame.c (find_frame_sal): Move call to get_next_frame into more inner scope. * inline-frame.c (inilne_state) <inline_state>: Update argument types. (inilne_state) <skipped_symbol>: Rename to... (inilne_state) <skipped_symbols>: ...this, and change to a vector. (skip_inline_frames): Build vector of skipped symbols and use this to reate the inline_state. (inline_skipped_symbol): Add a comment and some assertions, fetch skipped symbol from the list. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-inline-many-frames.c: New file. * gdb.dwarf2/dw2-inline-many-frames.exp: New file. Change-Id: I99def5ffb44eb9e58cda4b449bf3d91ab0386c62
2020-01-13gdb: add back declarations for _initialize functionsSimon Marchi1-1/+2
I'd like to enable the -Wmissing-declarations warning. However, it warns for every _initialize function, for example: CXX dcache.o /home/smarchi/src/binutils-gdb/gdb/dcache.c: In function ‘void _initialize_dcache()’: /home/smarchi/src/binutils-gdb/gdb/dcache.c:688:1: error: no previous declaration for ‘void _initialize_dcache()’ [-Werror=missing-declarations] _initialize_dcache (void) ^~~~~~~~~~~~~~~~~~ The only practical way forward I found is to add back the declarations, which were removed by this commit: commit 481695ed5f6e0a8a9c9c50bfac1cdd2b3151e6c9 Author: John Baldwin <jhb@FreeBSD.org> Date: Sat Sep 9 11:02:37 2017 -0700 Remove unnecessary function prototypes. I don't think it's a big problem to have the declarations for these functions, but if anybody has a better solution for this, I'll be happy to use it. gdb/ChangeLog: * aarch64-fbsd-nat.c (_initialize_aarch64_fbsd_nat): Add declaration. * aarch64-fbsd-tdep.c (_initialize_aarch64_fbsd_tdep): Add declaration. * aarch64-linux-nat.c (_initialize_aarch64_linux_nat): Add declaration. * aarch64-linux-tdep.c (_initialize_aarch64_linux_tdep): Add declaration. * aarch64-newlib-tdep.c (_initialize_aarch64_newlib_tdep): Add declaration. * aarch64-tdep.c (_initialize_aarch64_tdep): Add declaration. * ada-exp.y (_initialize_ada_exp): Add declaration. * ada-lang.c (_initialize_ada_language): Add declaration. * ada-tasks.c (_initialize_tasks): Add declaration. * agent.c (_initialize_agent): Add declaration. * aix-thread.c (_initialize_aix_thread): Add declaration. * alpha-bsd-nat.c (_initialize_alphabsd_nat): Add declaration. * alpha-linux-nat.c (_initialize_alpha_linux_nat): Add declaration. * alpha-linux-tdep.c (_initialize_alpha_linux_tdep): Add declaration. * alpha-nbsd-tdep.c (_initialize_alphanbsd_tdep): Add declaration. * alpha-obsd-tdep.c (_initialize_alphaobsd_tdep): Add declaration. * alpha-tdep.c (_initialize_alpha_tdep): Add declaration. * amd64-darwin-tdep.c (_initialize_amd64_darwin_tdep): Add declaration. * amd64-dicos-tdep.c (_initialize_amd64_dicos_tdep): Add declaration. * amd64-fbsd-nat.c (_initialize_amd64fbsd_nat): Add declaration. * amd64-fbsd-tdep.c (_initialize_amd64fbsd_tdep): Add declaration. * amd64-linux-nat.c (_initialize_amd64_linux_nat): Add declaration. * amd64-linux-tdep.c (_initialize_amd64_linux_tdep): Add declaration. * amd64-nbsd-nat.c (_initialize_amd64nbsd_nat): Add declaration. * amd64-nbsd-tdep.c (_initialize_amd64nbsd_tdep): Add declaration. * amd64-obsd-nat.c (_initialize_amd64obsd_nat): Add declaration. * amd64-obsd-tdep.c (_initialize_amd64obsd_tdep): Add declaration. * amd64-sol2-tdep.c (_initialize_amd64_sol2_tdep): Add declaration. * amd64-tdep.c (_initialize_amd64_tdep): Add declaration. * amd64-windows-nat.c (_initialize_amd64_windows_nat): Add declaration. * amd64-windows-tdep.c (_initialize_amd64_windows_tdep): Add declaration. * annotate.c (_initialize_annotate): Add declaration. * arc-newlib-tdep.c (_initialize_arc_newlib_tdep): Add declaration. * arc-tdep.c (_initialize_arc_tdep): Add declaration. * arch-utils.c (_initialize_gdbarch_utils): Add declaration. * arm-fbsd-nat.c (_initialize_arm_fbsd_nat): Add declaration. * arm-fbsd-tdep.c (_initialize_arm_fbsd_tdep): Add declaration. * arm-linux-nat.c (_initialize_arm_linux_nat): Add declaration. * arm-linux-tdep.c (_initialize_arm_linux_tdep): Add declaration. * arm-nbsd-nat.c (_initialize_arm_netbsd_nat): Add declaration. * arm-nbsd-tdep.c (_initialize_arm_netbsd_tdep): Add declaration. * arm-obsd-tdep.c (_initialize_armobsd_tdep): Add declaration. * arm-pikeos-tdep.c (_initialize_arm_pikeos_tdep): Add declaration. * arm-symbian-tdep.c (_initialize_arm_symbian_tdep): Add declaration. * arm-tdep.c (_initialize_arm_tdep): Add declaration. * arm-wince-tdep.c (_initialize_arm_wince_tdep): Add declaration. * auto-load.c (_initialize_auto_load): Add declaration. * auxv.c (_initialize_auxv): Add declaration. * avr-tdep.c (_initialize_avr_tdep): Add declaration. * ax-gdb.c (_initialize_ax_gdb): Add declaration. * bfin-linux-tdep.c (_initialize_bfin_linux_tdep): Add declaration. * bfin-tdep.c (_initialize_bfin_tdep): Add declaration. * break-catch-sig.c (_initialize_break_catch_sig): Add declaration. * break-catch-syscall.c (_initialize_break_catch_syscall): Add declaration. * break-catch-throw.c (_initialize_break_catch_throw): Add declaration. * breakpoint.c (_initialize_breakpoint): Add declaration. * bsd-uthread.c (_initialize_bsd_uthread): Add declaration. * btrace.c (_initialize_btrace): Add declaration. * charset.c (_initialize_charset): Add declaration. * cli/cli-cmds.c (_initialize_cli_cmds): Add declaration. * cli/cli-dump.c (_initialize_cli_dump): Add declaration. * cli/cli-interp.c (_initialize_cli_interp): Add declaration. * cli/cli-logging.c (_initialize_cli_logging): Add declaration. * cli/cli-script.c (_initialize_cli_script): Add declaration. * cli/cli-style.c (_initialize_cli_style): Add declaration. * coff-pe-read.c (_initialize_coff_pe_read): Add declaration. * coffread.c (_initialize_coffread): Add declaration. * compile/compile-cplus-types.c (_initialize_compile_cplus_types): Add declaration. * compile/compile.c (_initialize_compile): Add declaration. * complaints.c (_initialize_complaints): Add declaration. * completer.c (_initialize_completer): Add declaration. * copying.c (_initialize_copying): Add declaration. * corefile.c (_initialize_core): Add declaration. * corelow.c (_initialize_corelow): Add declaration. * cp-abi.c (_initialize_cp_abi): Add declaration. * cp-namespace.c (_initialize_cp_namespace): Add declaration. * cp-support.c (_initialize_cp_support): Add declaration. * cp-valprint.c (_initialize_cp_valprint): Add declaration. * cris-linux-tdep.c (_initialize_cris_linux_tdep): Add declaration. * cris-tdep.c (_initialize_cris_tdep): Add declaration. * csky-linux-tdep.c (_initialize_csky_linux_tdep): Add declaration. * csky-tdep.c (_initialize_csky_tdep): Add declaration. * ctfread.c (_initialize_ctfread): Add declaration. * d-lang.c (_initialize_d_language): Add declaration. * darwin-nat-info.c (_initialize_darwin_info_commands): Add declaration. * darwin-nat.c (_initialize_darwin_nat): Add declaration. * dbxread.c (_initialize_dbxread): Add declaration. * dcache.c (_initialize_dcache): Add declaration. * disasm-selftests.c (_initialize_disasm_selftests): Add declaration. * disasm.c (_initialize_disasm): Add declaration. * dtrace-probe.c (_initialize_dtrace_probe): Add declaration. * dummy-frame.c (_initialize_dummy_frame): Add declaration. * dwarf-index-cache.c (_initialize_index_cache): Add declaration. * dwarf-index-write.c (_initialize_dwarf_index_write): Add declaration. * dwarf2-frame-tailcall.c (_initialize_tailcall_frame): Add declaration. * dwarf2-frame.c (_initialize_dwarf2_frame): Add declaration. * dwarf2expr.c (_initialize_dwarf2expr): Add declaration. * dwarf2loc.c (_initialize_dwarf2loc): Add declaration. * dwarf2read.c (_initialize_dwarf2_read): Add declaration. * elfread.c (_initialize_elfread): Add declaration. * exec.c (_initialize_exec): Add declaration. * extension.c (_initialize_extension): Add declaration. * f-lang.c (_initialize_f_language): Add declaration. * f-valprint.c (_initialize_f_valprint): Add declaration. * fbsd-nat.c (_initialize_fbsd_nat): Add declaration. * fbsd-tdep.c (_initialize_fbsd_tdep): Add declaration. * filesystem.c (_initialize_filesystem): Add declaration. * findcmd.c (_initialize_mem_search): Add declaration. * findvar.c (_initialize_findvar): Add declaration. * fork-child.c (_initialize_fork_child): Add declaration. * frame-base.c (_initialize_frame_base): Add declaration. * frame-unwind.c (_initialize_frame_unwind): Add declaration. * frame.c (_initialize_frame): Add declaration. * frv-linux-tdep.c (_initialize_frv_linux_tdep): Add declaration. * frv-tdep.c (_initialize_frv_tdep): Add declaration. * ft32-tdep.c (_initialize_ft32_tdep): Add declaration. * gcore.c (_initialize_gcore): Add declaration. * gdb-demangle.c (_initialize_gdb_demangle): Add declaration. * gdb_bfd.c (_initialize_gdb_bfd): Add declaration. * gdbarch-selftests.c (_initialize_gdbarch_selftests): Add declaration. * gdbarch.c (_initialize_gdbarch): Add declaration. * gdbtypes.c (_initialize_gdbtypes): Add declaration. * gnu-nat.c (_initialize_gnu_nat): Add declaration. * gnu-v2-abi.c (_initialize_gnu_v2_abi): Add declaration. * gnu-v3-abi.c (_initialize_gnu_v3_abi): Add declaration. * go-lang.c (_initialize_go_language): Add declaration. * go32-nat.c (_initialize_go32_nat): Add declaration. * guile/guile.c (_initialize_guile): Add declaration. * h8300-tdep.c (_initialize_h8300_tdep): Add declaration. * hppa-linux-nat.c (_initialize_hppa_linux_nat): Add declaration. * hppa-linux-tdep.c (_initialize_hppa_linux_tdep): Add declaration. * hppa-nbsd-nat.c (_initialize_hppanbsd_nat): Add declaration. * hppa-nbsd-tdep.c (_initialize_hppanbsd_tdep): Add declaration. * hppa-obsd-nat.c (_initialize_hppaobsd_nat): Add declaration. * hppa-obsd-tdep.c (_initialize_hppabsd_tdep): Add declaration. * hppa-tdep.c (_initialize_hppa_tdep): Add declaration. * i386-bsd-nat.c (_initialize_i386bsd_nat): Add declaration. * i386-cygwin-tdep.c (_initialize_i386_cygwin_tdep): Add declaration. * i386-darwin-nat.c (_initialize_i386_darwin_nat): Add declaration. * i386-darwin-tdep.c (_initialize_i386_darwin_tdep): Add declaration. * i386-dicos-tdep.c (_initialize_i386_dicos_tdep): Add declaration. * i386-fbsd-nat.c (_initialize_i386fbsd_nat): Add declaration. * i386-fbsd-tdep.c (_initialize_i386fbsd_tdep): Add declaration. * i386-gnu-nat.c (_initialize_i386gnu_nat): Add declaration. * i386-gnu-tdep.c (_initialize_i386gnu_tdep): Add declaration. * i386-go32-tdep.c (_initialize_i386_go32_tdep): Add declaration. * i386-linux-nat.c (_initialize_i386_linux_nat): Add declaration. * i386-linux-tdep.c (_initialize_i386_linux_tdep): Add declaration. * i386-nbsd-nat.c (_initialize_i386nbsd_nat): Add declaration. * i386-nbsd-tdep.c (_initialize_i386nbsd_tdep): Add declaration. * i386-nto-tdep.c (_initialize_i386nto_tdep): Add declaration. * i386-obsd-nat.c (_initialize_i386obsd_nat): Add declaration. * i386-obsd-tdep.c (_initialize_i386obsd_tdep): Add declaration. * i386-sol2-nat.c (_initialize_amd64_sol2_nat): Add declaration. * i386-sol2-tdep.c (_initialize_i386_sol2_tdep): Add declaration. * i386-tdep.c (_initialize_i386_tdep): Add declaration. * i386-windows-nat.c (_initialize_i386_windows_nat): Add declaration. * ia64-libunwind-tdep.c (_initialize_libunwind_frame): Add declaration. * ia64-linux-nat.c (_initialize_ia64_linux_nat): Add declaration. * ia64-linux-tdep.c (_initialize_ia64_linux_tdep): Add declaration. * ia64-tdep.c (_initialize_ia64_tdep): Add declaration. * ia64-vms-tdep.c (_initialize_ia64_vms_tdep): Add declaration. * infcall.c (_initialize_infcall): Add declaration. * infcmd.c (_initialize_infcmd): Add declaration. * inflow.c (_initialize_inflow): Add declaration. * infrun.c (_initialize_infrun): Add declaration. * interps.c (_initialize_interpreter): Add declaration. * iq2000-tdep.c (_initialize_iq2000_tdep): Add declaration. * jit.c (_initialize_jit): Add declaration. * language.c (_initialize_language): Add declaration. * linux-fork.c (_initialize_linux_fork): Add declaration. * linux-nat.c (_initialize_linux_nat): Add declaration. * linux-tdep.c (_initialize_linux_tdep): Add declaration. * linux-thread-db.c (_initialize_thread_db): Add declaration. * lm32-tdep.c (_initialize_lm32_tdep): Add declaration. * m2-lang.c (_initialize_m2_language): Add declaration. * m32c-tdep.c (_initialize_m32c_tdep): Add declaration. * m32r-linux-nat.c (_initialize_m32r_linux_nat): Add declaration. * m32r-linux-tdep.c (_initialize_m32r_linux_tdep): Add declaration. * m32r-tdep.c (_initialize_m32r_tdep): Add declaration. * m68hc11-tdep.c (_initialize_m68hc11_tdep): Add declaration. * m68k-bsd-nat.c (_initialize_m68kbsd_nat): Add declaration. * m68k-bsd-tdep.c (_initialize_m68kbsd_tdep): Add declaration. * m68k-linux-nat.c (_initialize_m68k_linux_nat): Add declaration. * m68k-linux-tdep.c (_initialize_m68k_linux_tdep): Add declaration. * m68k-tdep.c (_initialize_m68k_tdep): Add declaration. * machoread.c (_initialize_machoread): Add declaration. * macrocmd.c (_initialize_macrocmd): Add declaration. * macroscope.c (_initialize_macroscope): Add declaration. * maint-test-options.c (_initialize_maint_test_options): Add declaration. * maint-test-settings.c (_initialize_maint_test_settings): Add declaration. * maint.c (_initialize_maint_cmds): Add declaration. * mdebugread.c (_initialize_mdebugread): Add declaration. * memattr.c (_initialize_mem): Add declaration. * mep-tdep.c (_initialize_mep_tdep): Add declaration. * mi/mi-cmd-env.c (_initialize_mi_cmd_env): Add declaration. * mi/mi-cmds.c (_initialize_mi_cmds): Add declaration. * mi/mi-interp.c (_initialize_mi_interp): Add declaration. * mi/mi-main.c (_initialize_mi_main): Add declaration. * microblaze-linux-tdep.c (_initialize_microblaze_linux_tdep): Add declaration. * microblaze-tdep.c (_initialize_microblaze_tdep): Add declaration. * mips-fbsd-nat.c (_initialize_mips_fbsd_nat): Add declaration. * mips-fbsd-tdep.c (_initialize_mips_fbsd_tdep): Add declaration. * mips-linux-nat.c (_initialize_mips_linux_nat): Add declaration. * mips-linux-tdep.c (_initialize_mips_linux_tdep): Add declaration. * mips-nbsd-nat.c (_initialize_mipsnbsd_nat): Add declaration. * mips-nbsd-tdep.c (_initialize_mipsnbsd_tdep): Add declaration. * mips-sde-tdep.c (_initialize_mips_sde_tdep): Add declaration. * mips-tdep.c (_initialize_mips_tdep): Add declaration. * mips64-obsd-nat.c (_initialize_mips64obsd_nat): Add declaration. * mips64-obsd-tdep.c (_initialize_mips64obsd_tdep): Add declaration. * mipsread.c (_initialize_mipsread): Add declaration. * mn10300-linux-tdep.c (_initialize_mn10300_linux_tdep): Add declaration. * mn10300-tdep.c (_initialize_mn10300_tdep): Add declaration. * moxie-tdep.c (_initialize_moxie_tdep): Add declaration. * msp430-tdep.c (_initialize_msp430_tdep): Add declaration. * nds32-tdep.c (_initialize_nds32_tdep): Add declaration. * nios2-linux-tdep.c (_initialize_nios2_linux_tdep): Add declaration. * nios2-tdep.c (_initialize_nios2_tdep): Add declaration. * nto-procfs.c (_initialize_procfs): Add declaration. * objc-lang.c (_initialize_objc_language): Add declaration. * observable.c (_initialize_observer): Add declaration. * opencl-lang.c (_initialize_opencl_language): Add declaration. * or1k-linux-tdep.c (_initialize_or1k_linux_tdep): Add declaration. * or1k-tdep.c (_initialize_or1k_tdep): Add declaration. * osabi.c (_initialize_gdb_osabi): Add declaration. * osdata.c (_initialize_osdata): Add declaration. * p-valprint.c (_initialize_pascal_valprint): Add declaration. * parse.c (_initialize_parse): Add declaration. * ppc-fbsd-nat.c (_initialize_ppcfbsd_nat): Add declaration. * ppc-fbsd-tdep.c (_initialize_ppcfbsd_tdep): Add declaration. * ppc-linux-nat.c (_initialize_ppc_linux_nat): Add declaration. * ppc-linux-tdep.c (_initialize_ppc_linux_tdep): Add declaration. * ppc-nbsd-nat.c (_initialize_ppcnbsd_nat): Add declaration. * ppc-nbsd-tdep.c (_initialize_ppcnbsd_tdep): Add declaration. * ppc-obsd-nat.c (_initialize_ppcobsd_nat): Add declaration. * ppc-obsd-tdep.c (_initialize_ppcobsd_tdep): Add declaration. * printcmd.c (_initialize_printcmd): Add declaration. * probe.c (_initialize_probe): Add declaration. * proc-api.c (_initialize_proc_api): Add declaration. * proc-events.c (_initialize_proc_events): Add declaration. * proc-service.c (_initialize_proc_service): Add declaration. * procfs.c (_initialize_procfs): Add declaration. * producer.c (_initialize_producer): Add declaration. * psymtab.c (_initialize_psymtab): Add declaration. * python/python.c (_initialize_python): Add declaration. * ravenscar-thread.c (_initialize_ravenscar): Add declaration. * record-btrace.c (_initialize_record_btrace): Add declaration. * record-full.c (_initialize_record_full): Add declaration. * record.c (_initialize_record): Add declaration. * regcache-dump.c (_initialize_regcache_dump): Add declaration. * regcache.c (_initialize_regcache): Add declaration. * reggroups.c (_initialize_reggroup): Add declaration. * remote-notif.c (_initialize_notif): Add declaration. * remote-sim.c (_initialize_remote_sim): Add declaration. * remote.c (_initialize_remote): Add declaration. * reverse.c (_initialize_reverse): Add declaration. * riscv-fbsd-nat.c (_initialize_riscv_fbsd_nat): Add declaration. * riscv-fbsd-tdep.c (_initialize_riscv_fbsd_tdep): Add declaration. * riscv-linux-nat.c (_initialize_riscv_linux_nat): Add declaration. * riscv-linux-tdep.c (_initialize_riscv_linux_tdep): Add declaration. * riscv-tdep.c (_initialize_riscv_tdep): Add declaration. * rl78-tdep.c (_initialize_rl78_tdep): Add declaration. * rs6000-aix-tdep.c (_initialize_rs6000_aix_tdep): Add declaration. * rs6000-lynx178-tdep.c (_initialize_rs6000_lynx178_tdep): Add declaration. * rs6000-nat.c (_initialize_rs6000_nat): Add declaration. * rs6000-tdep.c (_initialize_rs6000_tdep): Add declaration. * run-on-main-thread.c (_initialize_run_on_main_thread): Add declaration. * rust-exp.y (_initialize_rust_exp): Add declaration. * rx-tdep.c (_initialize_rx_tdep): Add declaration. * s12z-tdep.c (_initialize_s12z_tdep): Add declaration. * s390-linux-nat.c (_initialize_s390_nat): Add declaration. * s390-linux-tdep.c (_initialize_s390_linux_tdep): Add declaration. * s390-tdep.c (_initialize_s390_tdep): Add declaration. * score-tdep.c (_initialize_score_tdep): Add declaration. * ser-go32.c (_initialize_ser_dos): Add declaration. * ser-mingw.c (_initialize_ser_windows): Add declaration. * ser-pipe.c (_initialize_ser_pipe): Add declaration. * ser-tcp.c (_initialize_ser_tcp): Add declaration. * ser-uds.c (_initialize_ser_socket): Add declaration. * ser-unix.c (_initialize_ser_hardwire): Add declaration. * serial.c (_initialize_serial): Add declaration. * sh-linux-tdep.c (_initialize_sh_linux_tdep): Add declaration. * sh-nbsd-nat.c (_initialize_shnbsd_nat): Add declaration. * sh-nbsd-tdep.c (_initialize_shnbsd_tdep): Add declaration. * sh-tdep.c (_initialize_sh_tdep): Add declaration. * skip.c (_initialize_step_skip): Add declaration. * sol-thread.c (_initialize_sol_thread): Add declaration. * solib-aix.c (_initialize_solib_aix): Add declaration. * solib-darwin.c (_initialize_darwin_solib): Add declaration. * solib-dsbt.c (_initialize_dsbt_solib): Add declaration. * solib-frv.c (_initialize_frv_solib): Add declaration. * solib-svr4.c (_initialize_svr4_solib): Add declaration. * solib-target.c (_initialize_solib_target): Add declaration. * solib.c (_initialize_solib): Add declaration. * source-cache.c (_initialize_source_cache): Add declaration. * source.c (_initialize_source): Add declaration. * sparc-linux-nat.c (_initialize_sparc_linux_nat): Add declaration. * sparc-linux-tdep.c (_initialize_sparc_linux_tdep): Add declaration. * sparc-nat.c (_initialize_sparc_nat): Add declaration. * sparc-nbsd-nat.c (_initialize_sparcnbsd_nat): Add declaration. * sparc-nbsd-tdep.c (_initialize_sparcnbsd_tdep): Add declaration. * sparc-obsd-tdep.c (_initialize_sparc32obsd_tdep): Add declaration. * sparc-sol2-tdep.c (_initialize_sparc_sol2_tdep): Add declaration. * sparc-tdep.c (_initialize_sparc_tdep): Add declaration. * sparc64-fbsd-nat.c (_initialize_sparc64fbsd_nat): Add declaration. * sparc64-fbsd-tdep.c (_initialize_sparc64fbsd_tdep): Add declaration. * sparc64-linux-nat.c (_initialize_sparc64_linux_nat): Add declaration. * sparc64-linux-tdep.c (_initialize_sparc64_linux_tdep): Add declaration. * sparc64-nat.c (_initialize_sparc64_nat): Add declaration. * sparc64-nbsd-nat.c (_initialize_sparc64nbsd_nat): Add declaration. * sparc64-nbsd-tdep.c (_initialize_sparc64nbsd_tdep): Add declaration. * sparc64-obsd-nat.c (_initialize_sparc64obsd_nat): Add declaration. * sparc64-obsd-tdep.c (_initialize_sparc64obsd_tdep): Add declaration. * sparc64-sol2-tdep.c (_initialize_sparc64_sol2_tdep): Add declaration. * sparc64-tdep.c (_initialize_sparc64_adi_tdep): Add declaration. * stabsread.c (_initialize_stabsread): Add declaration. * stack.c (_initialize_stack): Add declaration. * stap-probe.c (_initialize_stap_probe): Add declaration. * std-regs.c (_initialize_frame_reg): Add declaration. * symfile-debug.c (_initialize_symfile_debug): Add declaration. * symfile-mem.c (_initialize_symfile_mem): Add declaration. * symfile.c (_initialize_symfile): Add declaration. * symmisc.c (_initialize_symmisc): Add declaration. * symtab.c (_initialize_symtab): Add declaration. * target.c (_initialize_target): Add declaration. * target-connection.c (_initialize_target_connection): Add declaration. * target-dcache.c (_initialize_target_dcache): Add declaration. * target-descriptions.c (_initialize_target_descriptions): Add declaration. * thread.c (_initialize_thread): Add declaration. * tic6x-linux-tdep.c (_initialize_tic6x_linux_tdep): Add declaration. * tic6x-tdep.c (_initialize_tic6x_tdep): Add declaration. * tilegx-linux-nat.c (_initialize_tile_linux_nat): Add declaration. * tilegx-linux-tdep.c (_initialize_tilegx_linux_tdep): Add declaration. * tilegx-tdep.c (_initialize_tilegx_tdep): Add declaration. * tracectf.c (_initialize_ctf): Add declaration. * tracefile-tfile.c (_initialize_tracefile_tfile): Add declaration. * tracefile.c (_initialize_tracefile): Add declaration. * tracepoint.c (_initialize_tracepoint): Add declaration. * tui/tui-hooks.c (_initialize_tui_hooks): Add declaration. * tui/tui-interp.c (_initialize_tui_interp): Add declaration. * tui/tui-layout.c (_initialize_tui_layout): Add declaration. * tui/tui-regs.c (_initialize_tui_regs): Add declaration. * tui/tui-stack.c (_initialize_tui_stack): Add declaration. * tui/tui-win.c (_initialize_tui_win): Add declaration. * tui/tui.c (_initialize_tui): Add declaration. * typeprint.c (_initialize_typeprint): Add declaration. * ui-style.c (_initialize_ui_style): Add declaration. * unittests/array-view-selftests.c (_initialize_array_view_selftests): Add declaration. * unittests/child-path-selftests.c (_initialize_child_path_selftests): Add declaration. * unittests/cli-utils-selftests.c (_initialize_cli_utils_selftests): Add declaration. * unittests/common-utils-selftests.c (_initialize_common_utils_selftests): Add declaration. * unittests/copy_bitwise-selftests.c (_initialize_copy_bitwise_utils_selftests): Add declaration. * unittests/environ-selftests.c (_initialize_environ_selftests): Add declaration. * unittests/filtered_iterator-selftests.c (_initialize_filtered_iterator_selftests): Add declaration. * unittests/format_pieces-selftests.c (_initialize_format_pieces_selftests): Add declaration. * unittests/function-view-selftests.c (_initialize_function_view_selftests): Add declaration. * unittests/help-doc-selftests.c (_initialize_help_doc_selftests): Add declaration. * unittests/lookup_name_info-selftests.c (_initialize_lookup_name_info_selftests): Add declaration. * unittests/main-thread-selftests.c (_initialize_main_thread_selftests): Add declaration. * unittests/memory-map-selftests.c (_initialize_memory_map_selftests): Add declaration. * unittests/memrange-selftests.c (_initialize_memrange_selftests): Add declaration. * unittests/mkdir-recursive-selftests.c (_initialize_mkdir_recursive_selftests): Add declaration. * unittests/observable-selftests.c (_initialize_observer_selftest): Add declaration. * unittests/offset-type-selftests.c (_initialize_offset_type_selftests): Add declaration. * unittests/optional-selftests.c (_initialize_optional_selftests): Add declaration. * unittests/parse-connection-spec-selftests.c (_initialize_parse_connection_spec_selftests): Add declaration. * unittests/rsp-low-selftests.c (_initialize_rsp_low_selftests): Add declaration. * unittests/scoped_fd-selftests.c (_initialize_scoped_fd_selftests): Add declaration. * unittests/scoped_mmap-selftests.c (_initialize_scoped_mmap_selftests): Add declaration. * unittests/scoped_restore-selftests.c (_initialize_scoped_restore_selftests): Add declaration. * unittests/string_view-selftests.c (_initialize_string_view_selftests): Add declaration. * unittests/style-selftests.c (_initialize_style_selftest): Add declaration. * unittests/tracepoint-selftests.c (_initialize_tracepoint_selftests): Add declaration. * unittests/tui-selftests.c (_initialize_tui_selftest): Add declaration. * unittests/unpack-selftests.c (_initialize_unpack_selftests): Add declaration. * unittests/utils-selftests.c (_initialize_utils_selftests): Add declaration. * unittests/vec-utils-selftests.c (_initialize_vec_utils_selftests): Add declaration. * unittests/xml-utils-selftests.c (_initialize_xml_utils): Add declaration. * user-regs.c (_initialize_user_regs): Add declaration. * utils.c (_initialize_utils): Add declaration. * v850-tdep.c (_initialize_v850_tdep): Add declaration. * valops.c (_initialize_valops): Add declaration. * valprint.c (_initialize_valprint): Add declaration. * value.c (_initialize_values): Add declaration. * varobj.c (_initialize_varobj): Add declaration. * vax-bsd-nat.c (_initialize_vaxbsd_nat): Add declaration. * vax-nbsd-tdep.c (_initialize_vaxnbsd_tdep): Add declaration. * vax-tdep.c (_initialize_vax_tdep): Add declaration. * windows-nat.c (_initialize_windows_nat): Add declaration. (_initialize_check_for_gdb_ini): Add declaration. (_initialize_loadable): Add declaration. * windows-tdep.c (_initialize_windows_tdep): Add declaration. * x86-bsd-nat.c (_initialize_x86_bsd_nat): Add declaration. * x86-linux-nat.c (_initialize_x86_linux_nat): Add declaration. * xcoffread.c (_initialize_xcoffread): Add declaration. * xml-support.c (_initialize_xml_support): Add declaration. * xstormy16-tdep.c (_initialize_xstormy16_tdep): Add declaration. * xtensa-linux-nat.c (_initialize_xtensa_linux_nat): Add declaration. * xtensa-linux-tdep.c (_initialize_xtensa_linux_tdep): Add declaration. * xtensa-tdep.c (_initialize_xtensa_tdep): Add declaration. Change-Id: I13eec7e0ed2b3c427377a7bdb055cf46da64def9
2020-01-01Update copyright year range in all GDB files.Joel Brobecker1-1/+1
gdb/ChangeLog: Update copyright year range in all GDB files.
2019-11-22Replace the MSYMBOL_*_NAME macros with member functionsChristian Biesinger1-1/+1
Improves readability. In the future, it will also allow making the name private, once the name setter functions become member functions. gdb/ChangeLog: 2019-11-22 Christian Biesinger <cbiesinger@google.com> * ada-lang.c (ada_lookup_simple_minsym): Update. (ada_collect_symbol_completion_matches): Update. * ada-tasks.c (read_atcb): Update. * amd64-windows-tdep.c (amd64_skip_main_prologue): Update. (amd64_windows_skip_trampoline_code): Update. * arm-tdep.c (skip_prologue_function): Update. (arm_skip_stack_protector): Update. * arm-wince-tdep.c (arm_pe_skip_trampoline_code): Update. (arm_wince_skip_main_prologue): Update. * ax-gdb.c (gen_expr): Update. * block.c (call_site_for_pc): Update. * blockframe.c (find_pc_partial_function): Update. * breakpoint.c (set_breakpoint_location_function): Update. * btrace.c (ftrace_print_function_name): Update. (ftrace_function_switched): Update. * c-valprint.c (print_unpacked_pointer): Update. * coffread.c (coff_symfile_read): Update. * compile/compile-c-symbols.c (convert_symbol_bmsym): Update. * compile/compile-cplus-symbols.c (convert_symbol_bmsym): Update. * dwarf-index-write.c (write_psymbols): Update. * dwarf2loc.c (call_site_to_target_addr): Update. (func_verify_no_selftailcall): Update. (tailcall_dump): Update. (call_site_find_chain_1): Update. (dwarf_expr_reg_to_entry_parameter): Update. * elfread.c (elf_gnu_ifunc_record_cache): Update. * eval.c (evaluate_funcall): Update. (evaluate_subexp_standard): Update. (evaluate_subexp_for_sizeof): Update. * expprint.c (print_subexp_standard): Update. (dump_subexp_body_standard): Update. * frame.c (get_prev_frame_always_1): Update. * frv-tdep.c (frv_skip_main_prologue): Update. * gnu-v2-abi.c (gnuv2_value_rtti_type): Update. * gnu-v3-abi.c (gnuv3_rtti_type): Update. (gnuv3_get_typename_from_type_info): Update. (gnuv3_skip_trampoline): Update. * hppa-tdep.c (hppa_lookup_stub_minimal_symbol): Update. * i386-tdep.c (i386_skip_main_prologue): Update. (i386_pe_skip_trampoline_code): Update. * ia64-tdep.c (ia64_convert_from_func_ptr_addr): Update. * infcall.c (get_function_name): Update. * linespec.c (minsym_found): Update. * linux-fork.c (info_checkpoints_command): Update. * m32c-tdep.c (m32c_m16c_address_to_pointer): Update. (m32c_m16c_pointer_to_address): Update. * maint.c (maintenance_translate_address): Update. * minsyms.c (add_minsym_to_hash_table): Update. (add_minsym_to_demangled_hash_table): Update. (lookup_minimal_symbol_mangled): Update. (lookup_minimal_symbol_demangled): Update. (lookup_minimal_symbol_linkage): Update. (lookup_minimal_symbol_text): Update. (lookup_minimal_symbol_by_pc_name): Update. (minimal_symbol_is_less_than): Update. (compact_minimal_symbols): Update. (build_minimal_symbol_hash_tables): Update. (find_solib_trampoline_target): Update. * mips-tdep.c (mips_stub_frame_sniffer): Update. (mips_skip_pic_trampoline_code): Update. * msp430-tdep.c (msp430_skip_trampoline_code): Update. * objc-lang.c (info_selectors_command): Update. (info_classes_command): Update. (find_methods): Update. (find_imps): Update. * p-valprint.c (pascal_val_print): Update. * ppc-linux-tdep.c (powerpc_linux_in_dynsym_resolve_code): Update. * ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update. * printcmd.c (build_address_symbolic): Update. (info_symbol_command): Update. * psymtab.c (psymbol_name_matches): Update. (match_partial_symbol): Update. (lookup_partial_symbol): Update. (print_partial_symbols): Update. (sort_pst_symbols): Update. (maintenance_check_psymtabs): Update. * python/py-framefilter.c (py_print_frame): Update. * python/python.c (gdbpy_rbreak): Update. * record-btrace.c (btrace_get_bfun_name): Update. (btrace_call_history): Update. * rs6000-tdep.c (rs6000_skip_main_prologue): Update. (rs6000_skip_trampoline_code): Update. * sol-thread.c (info_cb): Update. * stabsread.c (scan_file_globals): Update. * stack.c (find_frame_funname): Update. (info_frame_command_core): Update. * symmisc.c (dump_msymbols): Update. * symtab.c (symbol_natural_name): Rename to.., (general_symbol_info::natural_name): ...this. (symbol_demangled_name): Rename to... (general_symbol_info::demangled_name): ...this. (symbol_search_name): Rename to... (general_symbol_info::search_name): ...this. (symbol_matches_search_name): Update. (find_pc_sect_line): Update. (skip_prologue_sal): Update. (search_symbols): Update. (print_msymbol_info): Update. (rbreak_command): Update. (completion_list_add_msymbol): Update. (completion_list_objc_symbol): Update. (get_msymbol_address): Update. * symtab.h (struct general_symbol_info): Add member functions natural_name (), linkage_name (), print_name (), demangled_name (), and search_name (). (SYMBOL_NATURAL_NAME): Update. (symbol_natural_name): Move to a member function on general_symbol_info. (SYMBOL_DEMANGLED_NAME): Update. (symbol_demangled_name): Move to a member function on general_symbol_info. (SYMBOL_SEARCH_NAME): Update. (symbol_search_name): Move to a member function on general_symbol_info. (MSYMBOL_NATURAL_NAME): Remove. (MSYMBOL_LINKAGE_NAME): Remove. (MSYMBOL_PRINT_NAME): Remove. (MSYMBOL_DEMANGLED_NAME): Remove. (MSYMBOL_SEARCH_NAME): Remove. * x86-tdep.c (x86_in_indirect_branch_thunk): Update. Change-Id: I65aa529843a9903e174ce799037e41f954a9fcee
2019-10-18[gdb] Fix more typos in commentsTom de Vries1-1/+1
Fix typos in comments. NFC. Tested on x86_64-linux. gdb/ChangeLog: 2019-10-18 Tom de Vries <tdevries@suse.de> * aarch64-tdep.c: Fix typos in comments. * ada-lang.c: Same. * ada-tasks.c: Same. * alpha-tdep.c: Same. * alpha-tdep.h: Same. * amd64-nat.c: Same. * amd64-windows-tdep.c: Same. * arc-tdep.c: Same. * arc-tdep.h: Same. * arch-utils.c: Same. * arm-nbsd-tdep.c: Same. * arm-tdep.c: Same. * ax-gdb.c: Same. * blockframe.c: Same. * btrace.c: Same. * c-varobj.c: Same. * coff-pe-read.c: Same. * coffread.c: Same. * cris-tdep.c: Same. * darwin-nat.c: Same. * dbxread.c: Same. * dcache.c: Same. * disasm.c: Same. * dtrace-probe.c: Same. * dwarf-index-write.c: Same. * dwarf2-frame-tailcall.c: Same. * dwarf2-frame.c: Same. * dwarf2read.c: Same. * eval.c: Same. * exceptions.c: Same. * fbsd-tdep.c: Same. * findvar.c: Same. * frame.c: Same. * frv-tdep.c: Same. * gnu-v3-abi.c: Same. * go32-nat.c: Same. * h8300-tdep.c: Same. * hppa-tdep.c: Same. * i386-linux-tdep.c: Same. * i386-tdep.c: Same. * ia64-libunwind-tdep.c: Same. * ia64-tdep.c: Same. * infcmd.c: Same. * infrun.c: Same. * linespec.c: Same. * linux-nat.c: Same. * linux-thread-db.c: Same. * machoread.c: Same. * mdebugread.c: Same. * mep-tdep.c: Same. * mn10300-tdep.c: Same. * namespace.c: Same. * objfiles.c: Same. * opencl-lang.c: Same. * or1k-tdep.c: Same. * osabi.c: Same. * ppc-linux-nat.c: Same. * ppc-linux-tdep.c: Same. * ppc-sysv-tdep.c: Same. * printcmd.c: Same. * procfs.c: Same. * record-btrace.c: Same. * record-full.c: Same. * remote-fileio.c: Same. * remote.c: Same. * rs6000-tdep.c: Same. * s12z-tdep.c: Same. * score-tdep.c: Same. * ser-base.c: Same. * ser-go32.c: Same. * skip.c: Same. * sol-thread.c: Same. * solib-svr4.c: Same. * solib.c: Same. * source.c: Same. * sparc-nat.c: Same. * sparc-sol2-tdep.c: Same. * sparc-tdep.c: Same. * sparc64-tdep.c: Same. * stabsread.c: Same. * stack.c: Same. * symfile.c: Same. * symtab.c: Same. * target-descriptions.c: Same. * target-float.c: Same. * thread.c: Same. * utils.c: Same. * valops.c: Same. * valprint.c: Same. * value.c: Same. * varobj.c: Same. * windows-nat.c: Same. * xcoffread.c: Same. * xstormy16-tdep.c: Same. * xtensa-tdep.c: Same. Change-Id: I5175f1b107bfa4e1cdd4a3361ccb4739e53c75c4
generated by cgit v1.1 at 2024-11-25 22:54:09 +0000