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Use tab for the first eight spaces of indentation, and align the gdb_printf
arguments to the open parenthesis of the function call.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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Add a pid parameter to linux_proc_xfer_memory_partial, making the
inferior_ptid reference bubble up close to the target_ops::xfer_partial
boundary. No behavior change expected.
Change-Id: I58171b00ee1bba1ea22efdbb5dcab8b1ab3aac4c
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Add a few debug statements that were useful to me when debugging why the
glibc probes interface wasn't getting used.
Change-Id: Ic20744f9fc80a90f196896b0829949411620c540
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solib implementations are typically used one at a time. So it will be
rare that you will want to enable debug for one solib kind, and
absolutely want to keep the others disabled. To make things simpler,
instead of adding separate variables / macros / commands for each solib
implementation, merge the existing ones (frv and aix) into a unified
"set/show debug solib", with the solib_debug_printf macro.
Change-Id: I6e18bbc7401724f37ae66681badb079d75ecf7fa
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Recent commit 32a5aa26256 ("[gdb/testsuite] Fix gdb.ada/float-bits.exp
for powerpc64le") started using command "maint print architecture", which
produces ~275 lines.
Rewrite the corresponding gdb_test_multiple to read line-by-line, to prevent
timeouts on slower test setups.
Note that this doesn't fix a timeout in the test-case on aarch64 due to:
...
gdbarch_dump: read_core_file_mappings = <0x817438>
(gdb) aarch64_dump_tdep: Lowest pc = 0x0x8000
...
Tested on x86_64-linux.
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gdb.reverse/next-reverse-bkpt-over-sr.exp
The tests set a break point with the command break *func. This sets a
breakpoint on the first instruction of the function. PowerPC uses
Global Entry Points (GEP) and Local Entry Points (LEP). The first
instruction in the function is the GEP. The GEP sets up register
r2 before reaching the LEP. When the function is called with func() the
function is entered via the LEP and the test fails because GDB does not
see the breakpoint on the GEP. However, if the function is called via a
function pointer, execution begins at the GEP as the test expects.
Currently finish-reverse-bkpt.exp uses source file finish-reverse.c and
next-reverse-bpkt-over-sr.exp uses source file step-reverse.c A new
source file was created for tests finish-reverse-bkpt.exp and
next-reverse-bkpt-over-sr.exp. The new files use the new function
pointer method to call the functions so the tests will work correctly on
both PowerPC with a GEP and LEP as well as on other systems. The GEP is
the same as the LEP on non PowerPC systems.
The expect files were changed to use the new source files and to set the
initial break point for the rest of the test on the function pointer call
for the function.
This patch fixes two PowerPC test failures in each of the tests
gdb.reverse/finish-reverse-bkpt.exp and
gdb.reverse/next-reverse-bkpt-over-sr.exp.
Patch tested on PowerPC and Intel X86-64 with no regressions.
Reviewed-By: Bruno Larsen <blarsen@redhat.com>
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I noticed that windows_nat_target::interrupt calls registers_changed.
However, I don't think there's any reason to do this, because this
will happen automatically when the inferior stop is processed.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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I belatedly realized that the "the_windows_nat_target" global isn't
really necessary. It's only used in one place, where 'this' would be
simpler and clearer. This patch removes the global entirely.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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It is only used inside frame.c.
Change-Id: I44eb46a5992412f8f8b4954b2284b0ef3b549504
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PR symtab/29105 shows a number of situations where symbol lookup can
result in the expansion of too many CUs.
What happens is that lookup_signed_typename will try to look up a type
like "signed int". In cooked_index_functions::expand_symtabs_matching,
when looping over languages, the C++ case will canonicalize this type
name to be "int" instead. Then this method will proceed to expand
every CU that has an entry for "int" -- i.e., nearly all of them. A
crucial component of this is that the caller, objfile::lookup_symbol,
does not do this canonicalization, so when it tries to find the symbol
for "signed int", it fails -- causing the loop to continue.
This patch fixes the problem by introducing name canonicalization for
C. The idea here is that, by making C and C++ agree on the canonical
name when a symbol name can have multiple spellings, we avoid the bad
behavior in objfile::lookup_symbol (and any other such code -- I don't
know if there is any).
Unlike C++, C only has a few situations where canonicalization is
needed. And, in particular, due to the lack of overloading (thus
avoiding any issues in linespec) and due to the way c-exp.y works, I
think that no canonicalization is needed during symbol lookup -- only
during symtab construction. This explains why lookup_name_info is not
touched.
The stabs reader is modified on a "best effort" basis.
The DWARF reader needed one small tweak in dwarf2_name to avoid a
regression in dw2-unusual-field-names.exp. I think this is adequately
explained by the comment, but basically this is a scenario that should
not occur in real code, only the gdb test suite.
lookup_signed_typename is simplified. It used to search for two
different type names, but now gdb can search just for the canonical
form.
gdb.dwarf2/enum-type.exp needed a small tweak, because the
canonicalizer turns "unsigned integer" into "unsigned int integer".
It seems better here to use the correct C type name.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29105
Tested-by: Simon Marchi <simark@simark.ca>
Reviewed-by: Andrew Burgess <aburgess@redhat.com>
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This refactors cooked_index::do_finalize, reordering an 'if' to make
it a little less redundant. This change makes a subsequent patch
easier to read.
Reviewed-by: Andrew Burgess <aburgess@redhat.com>
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dwarf2_compute_name has a redundant check of the CU's language -- this
is also checked in dwarf2_canonicalize_name. Removing this slightly
simplifies a future patch.
Reviewed-by: Andrew Burgess <aburgess@redhat.com>
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While testing the fix for PR 29105, I noticed I couldn't ctrl-C my way
out of GDB expanding many symtabs. GDB was busy in a loop in
cooked_index_functions::expand_symtabs_matching. Add a QUIT there. I
also happened to see a spot in
cooked_index_functions::expand_matching_symbols where a QUIT would be
useful too, since we iterate over a potentially big number of index
entries and expand CUs in the loop. Add one there too.
Change-Id: Ie1d650381df7f944c16d841b3e592d2dce7306c3
Approved-By: Kevin Buettner <kevinb@redhat.com>
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Pedro mentioned that this prune_threads call in
thread_db_target::update_thread_list was not needed, and it was probably
an oversight to leave it there in the work following commit e8032dde10b
("Push pruning old threads down to the target"). That commit changed
the "find new threads" target operation to "update thread list", making
the target responsible of adding new threads and removing exited
threads, rather than just adding new threads. Commit e8032dde10b moved
the prune_threads calls previously done in common code into each
target's update_thread_list method, in order to keep the existing
behavior, which is why this prune_threads call ended up there.
In the mean time, the linux-nat target was taught to update_thread_list,
and thread_db_target::update_thread_list defers to that for any live
inferior, so the prune_threads call is not needed there. Otherwise, the
thread_db_target::update_thread_list implementation based on
td_ta_thr_iter_p only knows how to add new threads, not how to delete
exited threads, but that is only used for non-live inferiors, where
threads can't exit anyway. So the prune_threads call is not needed for
that case either.
Change-Id: I127fd4f84c25086f97853dadf34c5cec6816840d
Approved-By: Pedro Alves <pedro@palves.net>
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PR compile/29541 points out that some of the C++ tests in gdb.compile
will time out when the glibc debuginfo is installed. This was
interfering with my hacking on gdb by making test runs extremely long,
so I looked into it.
Internally the bug seems to be that gdb tries to convert multiple
symbols named "var" via the compiler interface; one such symbol (I
didn't track it down too far) causes the C++ compiler plugin to crash.
Unfortunately, the crash is reported as a timeout, as the gdb side of
the plugin simply hangs. This seems like a bug in the plugin RPC
mechanism and, worse, apparently when I wrote this stuff I didn't
really consider error reporting very much at all, so gdb can't really
detect failures in the first place.
Anyway... this patch works around the timeout by compiling a simple
test that should provoke this bug, and then using "untested" if it
notices a GCC crash.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29541
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skip_compile_feature_tests checks for "Command not supported on this
host", but this error was removed by commit e8d8cce6 ("Import mkdtemp
gnulib module, fix mingw build"). This patch removes the obsolete
test.
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I noticed that there are two identical copies of
skip_compile_feature_tests in the test suite. This removes one from
gdb.exp, in favor of the one in compile-support.exp.
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When I run the gdb testsuite on a powerpc64le-linux system with (slow) nfs
file system, I run into timeouts due to core generation, like for instance:
...
(gdb) gcore $outputs/gdb.ada/task_switch_in_core/crash.gcore^M
FAIL: gdb.ada/task_switch_in_core.exp: save a corefile (timeout)
...
Fix this by using with_timeout_factor 3 in gdb_gcore_cmd.
Tested on powerpc64le-linux.
Approved-By: Tom Tromey <tom@tromey.com>
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On powerpc64le-linux, I run into:
...
(gdb) print 16llf#4000921fb54442d18469898cc51701b8#^M
$9 = <invalid float value>^M
(gdb) FAIL: gdb.ada/float-bits.exp: print \
16llf#4000921fb54442d18469898cc51701b8#
...
The problem is that we're using a hex string for the 128-bit IEEE quad long
double format, but the actual long double float format is:
...
gdbarch_dump: long_double_format = floatformat_ibm_long_double_little^M
...
Fix this by using the hex string obtained by compiling test.c:
...
long double a = 5.0e+25L;
...
like so:
...
$ gcc -mlittle test.c -c -g
...
and running gdb:
...
$ gdb -q -batch test.o -ex "p /x a"
$1 = 0xc1e1c000000000004544adf4b7320335
...
and likewise for -mbig:
...
$ gdb -q -batch test.o -ex "p /x a"
$1 = 0x4544adf4b7320335c1e1c00000000000
...
Tested on powerpc64le-linux.
I excercised the case of floatformat_ibm_long_double_big by
using "set endian big" in the test-case.
Note that for this patch to work correctly, recent commit aaa79cd62b8 ("[gdb]
Improve printing of float formats") is required.
PR testsuite/29816
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29816
Approved-By: Tom Tromey <tom@tromey.com>
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On s390x-linux, I run into:
...
DUPLICATE: gdb.arch/s390-multiarch.exp: Linux v2
DUPLICATE: gdb.arch/s390-multiarch.exp: Linux v2
DUPLICATE: gdb.arch/s390-multiarch.exp: Linux v2
...
Fix this by using with_test_prefix.
Tested on s390x-linux.
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--enable-targets=all
On s390x-linux, I run into:
...
DUPLICATE: gdb.arch/s390-disassembler-options.exp: \
show disassembler-options esa
...
First, reproduce this on x86_64-linux with --enable-targets=all, by replacing
the test for 'istarget "s390*-*-*"' with a test for 'get_set_option_choices
"set architecture" "s390"'.
Fix the DUPLICATE by using with_test_prefix.
Also modernize the test-case by using clean_restart instead of gdb_exit/gdb_start.
Tested on x86_64-linux.
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While looking into Ada tasking a little, I noticed that no bounds
checking is done on accesses to the Ada task state names arrays. This
isn't a problem currently, but if the runtime ever added numbers -- or
if there was some kind of runtime corruption -- it could cause a gdb
crash.
This patch adds range checking. It also adds a missing _() call when
printing from the 'task_states' array.
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This changes mi_interp to use ui_file_up rather than explicit
management.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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This renames the fields of cli_interp_base::saved_output_files, as
requested by Simon. I tried to choose names that more obviously
reflect what the field is used for. I also added a couple of
comments.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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Currently, on x86_64, a little endian target, I get:
...
$ gdb -q -batch -ex "maint print architecture" | grep " = floatformat"
gdbarch_dump: bfloat16_format = floatformat_bfloat16_big
gdbarch_dump: double_format = floatformat_ieee_double_big
gdbarch_dump: float_format = floatformat_ieee_single_big
gdbarch_dump: half_format = floatformat_ieee_half_big
gdbarch_dump: long_double_format = floatformat_i387_ext
...
which suggests big endian.
This is due to this bit of code in pformat:
...
/* Just print out one of them - this is only for diagnostics. */
return format[0]->name;
...
Fix this by using gdbarch_byte_order to pick the appropriate index, such that
we have the more accurate:
...
gdbarch_dump: bfloat16_format = floatformat_bfloat16_little
gdbarch_dump: half_format = floatformat_ieee_half_little
gdbarch_dump: float_format = floatformat_ieee_single_little
gdbarch_dump: double_format = floatformat_ieee_double_little
gdbarch_dump: long_double_format = floatformat_i387_ext
...
Tested on x86_64-linux.
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On powerpc64le-linux, I run into:
...
(gdb) PASS: gdb.base/vla-optimized-out.exp: o1: printed optimized out vla
p sizeof (a)^M
$2 = <optimized out>^M
(gdb) FAIL: gdb.base/vla-optimized-out.exp: o1: \
printed size of optimized out vla
...
The problem happens as follows.
In order to find the size of the optimized out vla, gdb needs to evaluate:
...
<155> DW_AT_upper_bound : 13 byte block: f3 1 53 23 1 8 20 24 8 20 26 31 1c \
(DW_OP_GNU_entry_value: (DW_OP_reg3 (r3)); DW_OP_plus_uconst: 1;
DW_OP_const1u: 32; DW_OP_shl; DW_OP_const1u: 32; DW_OP_shra; DW_OP_lit1;
DW_OP_minus)
...
When trying to evaluate DW_OP_GNU_entry_value, it looks for a call site
matching the pc, but doesn't find it:
...
$ gdb -q -batch outputs/gdb.base/vla-optimized-out/vla-optimized-out-o1 \
-ex "break f1" -ex run -ex "set debug entry-values 1" -ex "print sizeof (a)"
Breakpoint 1 at 0x1000067c: file vla-optimized-out.c, line 34.
Breakpoint 1, f1 (i=5) at vla-optimized-out.c:34
34 }
DW_OP_entry_value resolving cannot find DW_TAG_call_site 0x100006b0 in main
$1 = <optimized out>
....
The call site lookup fails because the call site label .LVL4:
...
bl f1 # 11 *call_value_nonlocal_aixdi [length = 8]
nop
.LVL4:
...
is not placed directly after the bl insn. This is gcc PR target/107909.
However, after manually fixing the .s file we have instead:
...
Cannot find matching parameter at DW_TAG_call_site 0x10000690 at main
$1 = <optimized out>
...
due to the fact that the call site has no call site parameters.
The call site does have a reference to the corresponding function f1, with
parameter i, for which we find location list entries:
...
0037 1000067c 10000680 (DW_OP_reg3 (r3))
004a 10000680 10000690 (DW_OP_GNU_entry_value: (DW_OP_reg3 (r3));
DW_OP_stack_value)
...
and we could use the fact that the current pc is in the 1000067c-10000680
range, and that that the range starts at the start of the function, to deduce
that DW_OP_GNU_entry_value: (DW_OP_reg3 (r3)) == DW_OP_reg3 (r3).
But that's a non-trivial enhancement, filed as enhancement PR symtab/29836.
Fix this by allowing <optimized out> for target powerpc and the gcc compiler.
Reviewed-By: Carl Love <cel@us.ibm.com>
Tested-By: Carl Love <cel@us.ibm.com>
PR testsuite/29813
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29813
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In the failure seen by Philippe here:
https://inbox.sourceware.org/gdb-patches/20221120173024.3647464-1-philippe.waroquiers@skynet.be/
gdb_unload crashed GDB, leaving no trace in the test results. Change it
to use gdb_test_multiple, so that it leaves an UNRESOLVED result. I
think it is good practice anyway.
Make it return the result of gdb_test_multiple directly, change
gdb.python/py-objfile.exp accordingly.
Change gdb.base/endian.exp as well to avoid duplicate test names.
Change gdb.base/gnu-debugdata.exp to avoid recording a test result,
since gdb_unload does it already now.
Change-Id: I59a1e4947691330797e6ce23277942547c437a48
Approved-By: Tom de Vries <tdevries@suse.de>
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In the failure seen by Philippe here:
https://inbox.sourceware.org/gdb-patches/20221120173024.3647464-1-philippe.waroquiers@skynet.be/
... the testsuite only outputs PASSes, and an ERROR, resulting from an
uncaught exception. This is a bit sneaky, because ERRORs are not
reported in the test summary. In certain circumstances, it can be easy
to miss.
Normally, gdb_test_multiple outputs an UNRESOLVED when GDB crashes. But
this is only if it manages to send the command, and it's that command
that crashes GDB. Here, the ERROR is due to the fact that GDB had
already crashed by the time we entered gdb_test_multiple and tried to
send a command. GDB was crashed by the previous "file" command, sent by
gdb_unload. Because gdb_unload uses bare expect, it didn't record a
test failure when crashing GDB (this will be addressed separately).
In this patch, I propose to make gdb_test_multiple call unresolved
directly and return -1 send_gdb fails. This way, if GDB is already
crashed by the time we enter gdb_test_multiple, it will leave a trace in
the test results in the form of an UNRESOLVED. It will also spare us
the not-so-useful-in-my-opinion TCL backtrace.
Before, it looks like:
ERROR: Couldn't send python print(objfile.filename) to GDB.
ERROR: : spawn id exp9 not open
while executing
"expect {
-i exp9 -timeout 10
-re ".*A problem internal to GDB has been detected" {
fail "$message (GDB internal error)"
gdb_internal_error..."
("uplevel" body line 1)
invoked from within
"uplevel $body" NONE : spawn id exp9 not open
And after:
Couldn't send python print(objfile.filename) to GDB.
UNRESOLVED: gdb.python/py-objfile.exp: objfile.filename after objfile is unloaded
Change-Id: I72af8dc0d687826fc3f76911c27a9e5f91b677ba
Approved-By: Tom de Vries <tdevries@suse.de>
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the testsuite
library files (in boards/, config/, and lib/). Previous commits have
removed all uses of the 'then' keyword from the test script files,
this commit just cleans up the library files.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the remaining
gdb.*/*.exp scripts. Previous commits have done the bulk of this
removal, this commit just handles the remaining directories that each
contain a low number of instances.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.multi/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.fortran/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.disasm/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.reverse/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.trace/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.threads/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.python/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.cp/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.arch/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.base/
test script directory.
There should be no changes in what is tested after this commit.
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The canonical form of 'if' in modern TCL is 'if {} {}'. But there's
still a bunch of places in the testsuite where we make use of the
'then' keyword, and sometimes these get copies into new tests, which
just spreads poor practice.
This commit removes all use of the 'then' keyword from the gdb.ada/
test script directory.
There should be no changes in what is tested after this commit.
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The gdb.fortran/nested-funcs.exp test script has DOS line endings. I
can see no reason why this script needs DOS line endings.
Convert to UNIX line endings.
There should be no change in what is tested after this commit.
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When using the "set logging" commands, cli_interp_base::set_logging
will send gdb_stdlog output (among others) to the tee it makes for
gdb_stdout. However, this has the side effect of also causing logging
to use the pager. This is PR gdb/29787.
This patch fixes the problem by keeping stderr and stdlog separate
from stdout, preserving the rule that only gdb_stdout should page.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29787
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Right now, tee_file owns the second stream it writes to. This is done
for the convenience of the users. In a subsequent patch, this will no
longer be convenient, so this patch moves the responsibility for
ownership to the users of tee_file.
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CLI redirect uses a global variable, 'saved_output'. However, globals
are generally bad, and there is no need for this one -- it can be a
member of cli_interp_base. This patch makes this change.
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The out label is unused since wait_for_debug_event is in a different thread.
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Looks like this was missed in the async mode implementation.
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Older gcc versions (here 4.9.2) can't handle auto for a lambda parameter:
../../gdb/windows-nat.c: In member function 'void windows_nat_target::delete_thread(ptid_t, DWORD, bool)':
../../gdb/windows-nat.c:629:12: error: use of 'auto' in lambda parameter declaration only available with -std=c++1y or -std=gnu++1y [-Werror]
[=] (auto &th)
^
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For i686 the CreateThread entry point function needs the WINAPI (stdcall)
calling convention:
../../gdb/windows-nat.c: In constructor 'windows_nat_target::windows_nat_target()':
../../gdb/windows-nat.c:450:56: error: invalid user-defined conversion from 'windows_nat_target::windows_nat_target()::<lambda(LPVOID)>' to 'LPTHREAD_START_ROUTINE' {aka 'long unsigned int (__attribute__((stdcall)) *)(void*)'} [-fpermissive]
450 | HANDLE bg_thread = CreateThread (nullptr, 64 * 1024, fn, this, 0, nullptr);
| ^~
../../gdb/windows-nat.c:444:13: note: candidate is: 'constexpr windows_nat_target::windows_nat_target()::<lambda(LPVOID)>::operator DWORD (*)(LPVOID)() const' (near match)
444 | auto fn = [] (LPVOID self) -> DWORD
| ^
../../gdb/windows-nat.c:444:13: note: no known conversion from 'DWORD (*)(LPVOID)' {aka 'long unsigned int (*)(void*)'} to 'LPTHREAD_START_ROUTINE' {aka 'long unsigned int (__attribute__((stdcall)) *)(void*)'}
Since it's not possible to change the calling convention of a lambda, I've
moved it to a separate function.
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