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2016-07-25btrace: Resume recording after disconnect.Tim Wiederhake2-1/+7
This patch allows gdbserver to continue recording after disconnect. On reconnect, the recorded data is accessible to gdb as if no disconnect happened. A possible application for this feature is remotely examine bugs that occur at irregular intervals, where maintaining a gdb connection is inconvenient. This also fixes the issue mentioned here: https://sourceware.org/ml/gdb-patches/2015-11/msg00424.html Signed-off-by: Tim Wiederhake <tim.wiederhake@intel.com> gdb/ChangeLog: * NEWS: Resume btrace on reconnect. * record-btrace.c: Added record-btrace.h include. (record_btrace_open): Split into this and ... (record_btrace_push_target): ... this. (record_btrace_disconnect): New function. (init_record_btrace_ops): Use record_btrace_disconnect. * record-btrace.h: New file. * remote.c: Added record-btrace.h include. (remote_start_remote): Check recording status. (remote_btrace_maybe_reopen): New function. gdb/doc/ChangeLog: * gdb.texinfo: Resume btrace on reconnect. gdb/testsuite/ChangeLog: * gdb.btrace/reconnect.c: New file. * gdb.btrace/reconnect.exp: New file. Change-Id: I95e8b0ab8a89e58591aba0e63818cee82fd211bc
2016-07-23Implement catch syscall groupGabriel Krisman Bertazi2-1/+32
Implement support to add catchpoints for a group of related syscalls using the syntax: (gdb) catch syscall group:<group> or (gdb) catch syscall g:<group> Several groups are predefined in the xml files for all architectures supported by GDB over Linux. They are based on the groups defined by strace. gdb/ * xml-syscall.c (get_syscalls_by_group): New. (get_syscall_group_names): New. (struct syscall_group_desc): New structure to store group data. (struct syscalls_info): Include field to store the group list. (sysinfo_free_syscall_group_desc): New. (free_syscalls_info): Free group list. (syscall_group_create_syscall_group_desc): New. (syscall_group_add_syscall): New. (syscall_create_syscall_desc): Add syscall to its groups. (syscall_start_syscall): Load group attribute. (syscall_group_get_group_by_name): New. (xml_list_syscalls_by_group): New. (xml_list_of_groups): New. * xml-syscall.h (get_syscalls_by_group): Export function to retrieve a list of syscalls filtered by the group name. (get_syscall_group_names): Export function to retrieve the list of syscall groups. * break-catch-syscall.c (catch_syscall_split_args): Verify if argument is a syscall group and expand it to a list of syscalls when creating catchpoints. (catch_syscall_completer): Add word completion for system call groups. * configure.ac: Include dependency for xsltproc when building in maintainer-mode. * break-catch-syscall.c (_initialize_breakpoint): Update catch syscall command documentation. * NEWS: Include section about catching groups of syscalls. * configure: Regenerate. * data-directory/Makefile.in: Generate syscall xml when building in maintainer mode. * syscalls/gdb-syscalls.dtd: Include group attribute to the syscall element. * syscalls/apply-defaults.xsl: New. * syscalls/linux-defaults.xml.in: New. * syscalls/aarch64-linux.xml: Rename to aarch64-linux.xml.in. * syscalls/amd64-linux.xml: Rename to amd64-linux.xml.in. * syscalls/arm-linux.xml: Rename to arm-linux.xml.in. * syscalls/bfin-linux.xml: Rename to bfin-linux.xml.in. * syscalls/i386-linux.xml: Rename to i386-linux.xml.in. * syscalls/mips-n32-linux.xml: Rename to mips-n32-linux.xml.in. * syscalls/mips-n64-linux.xml: Rename to mips-n64-linux.xml.in. * syscalls/mips-o32-linux.xml: Rename to mips-o32-linux.xml.in. * syscalls/ppc-linux.xml: Rename to ppc-linux.xml.in. * syscalls/ppc64-linux.xml: Rename to ppc64-linux.xml.in. * syscalls/s390-linux.xml: Rename to s390-linux.xml.in. * syscalls/s390x-linux.xml: Rename to s390x-linux.xml.in. * syscalls/sparc-linux.xml: Rename to sparc-linux.xml.in. * syscalls/sparc64-linux.xml: Rename to sparc64-linux.xml.in. * syscalls/aarch64-linux.xml: Regenerate. * syscalls/amd64-linux.xml: Regenerate. * syscalls/arm-linux.xml: Regenerate. * syscalls/i386-linux.xml: Regenerate. * syscalls/mips-n32-linux.xml: Regenerate. * syscalls/mips-n64-linux.xml: Regenerate. * syscalls/mips-o32-linux.xml: Regenerate. * syscalls/ppc-linux.xml: Regenerate. * syscalls/ppc64-linux.xml: Regenerate. * syscalls/s390-linux.xml: Regenerate. * syscalls/s390x-linux.xml: Regenerate. * syscalls/sparc-linux.xml: Regenerate. * syscalls/sparc64-linux.xml: Regenerate. gdb/testsuite/ * gdb.base/catch-syscall.exp (do_syscall_tests): Add call to test_catch_syscall_group. (test_catch_syscall_group): New. gdb/doc/ * gdb.texinfo (Set Catchpoints): Add 'group' argument to catch syscall.
2016-07-23Support JIT debugging on MS-WindowsРуслан Ижбулатов2-0/+35
gdb/ChangeLog: 2016-06-30 Руслан Ижбулатов <lrn1986@gmail.com> PR gdb/14529 * windows-nat.c (signal_event_command): New command 'signal-event' for W32 JIT debug support. * NEWS: Add an entry about the new 'signal-event' command. gdb/doc/ChangeLog: 2016-06-30 Руслан Ижбулатов <lrn1986@gmail.com> * gdb.texinfo (Cygwin Native): Document the new 'signal-event' command.
2016-07-13PR python/15620, PR python/18620 - breakpoint events in PythonTom Tromey2-0/+20
This patch adds some breakpoint events to Python. In particular, there is a creation event that is emitted when a breakpoint is created; a modification event that is emitted when a breakpoint changes somehow; and a deletion event that is emitted when a breakpoint is deleted. In this patch, the event's payload is the breakpoint itself. I considered making a new event type to hold the breakpoint, but I didn't see a need. Still, I thought I would mention this as a spot where some other choice is possible. Built and regtested on x86-64 Fedora 23. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/15620, PR python/18620: * python/py-evts.c (gdbpy_initialize_py_events): Call add_new_registry for new events. * python/py-events.h (events_object) <breakpoint_created, breakpoint_deleted, breakpoint_modified>: New fields. * python/py-breakpoint.c (gdbpy_breakpoint_created): Emit the breakpoint changed event. (gdbpy_breakpoint_deleted): Emit the breakpoint deleted event. (gdbpy_breakpoint_modified): New function. (gdbpy_initialize_breakpoints): Attach to the breakpoint modified observer. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/15620, PR python/18620: * python.texi (Events In Python): Document new breakpoint events. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/15620, PR python/18620: * gdb.python/py-breakpoint.exp (connect_event, check_last_event) (test_bkpt_events): New procs.
2016-07-13PR python/17698 - add Breakpoint.pendingTom Tromey2-0/+12
This patch adds a "pending" attribute to gdb.Breakpoint. Built and regtested on x86-64 Fedora 23. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/17698: * NEWS: Update. * python/py-breakpoint.c (bppy_get_pending): New function. (breakpoint_object_getset): Add entry for "pending". * breakpoint.h (pending_breakpoint_p): Declare. * breakpoint.c (pending_breakpoint_p): New function. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/17698: * python.texi (Breakpoints In Python): Document Breakpoint.pending. 2016-07-13 Tom Tromey <tom@tromey.com> PR python/17698: * gdb.python/py-breakpoint.exp (test_bkpt_basic): Add "pending" test. (test_watchpoints): Likewise. (test_bkpt_pending): New proc.
2016-07-13Rearrange Python breakpoint node in documentationTom Tromey2-42/+47
I noticed that the Python breakpoint documentation was ordered a bit oddly. It documented the constructor; then the stop method; then the watchpoint constants (used for the constructor); then various other methods and attributes; then the other constants used by the constructor; and then finally some more methods and attributes. This patch rearranges the node a little to move the constants to just after the constructor and before the other methods and attributes. 2016-07-13 Tom Tromey <tom@tromey.com> * python.texi (Breakpoints In Python): Move table of types and table of watchpoint types earlier in node.
2016-07-12PR python/19293 - invalidate frame cache when unwinders changeTom Tromey2-0/+15
PR python/19293 notes that when a Python unwinder is disabled, the frame cache is not invalidated. This means that disabling an unwinder doesn't have any immediate effect -- but in my experience it's often the case that I want to enable or disable an unwinder in order to see what happens. This patch adds a new gdb.invalidate_cached_frames function and arranges for the relevant bits of library code to call it. I've only partially documented this function, considering a warning sufficient without going into all the reasons ordinary code should not call it. The name of the new function was taken from a comment in frame.h next to reinit_frame_cache. No new test as I think the updates to the existing test are sufficient to show that the code is working as intended. Built and regtested on x86-64 Fedora 23. 2016-07-12 Tom Tromey <tom@tromey.com> PR python/19293: * python/lib/gdb/command/unwinders.py (do_enable_unwinder): Call gdb.invalidate_cached_frames. * python/lib/gdb/unwinder.py (register_unwinder): Call gdb.invalidate_cached_frames. * python/python.c (gdbpy_invalidate_cached_frames): New function. (python_GdbMethods): Add entry for invalidate_cached_frames. 2016-07-12 Tom Tromey <tom@tromey.com> PR python/19293: * python.texi (Frames In Python): Document gdb.invalidate_cached_frames. 2016-07-12 Tom Tromey <tom@tromey.com> PR python/19293: * gdb.python/py-unwind-maint.exp: Update tests.
2016-06-21[DOC] Document support for running interpreters on separate UIsPedro Alves2-10/+51
gdb/ChangeLog: 2016-06-21 Pedro Alves <palves@redhat.com> * NEWS: Mention support for running interpreters on separate UIs and the new new-ui command. gdb/doc/ChangeLog: 2016-06-21 Pedro Alves <palves@redhat.com> * gdb.texinfo (Interpreters): Update intepreter-exec section, document new-ui and explain use case.
2016-06-17gdb: new AndesTech NDS32 portYan-Ting Lin2-0/+28
gdb/ChangeLog: * Makefile.in (ALL_TARGET_OBS): Add nds32-tdep.o. (HFILES_NO_SRCDIR): Add nds32-tdep.h. (ALLDEPFILES): Add nds32-tdep.c. * NEWS: Mention new NDS32 port. * configure.tgt: Add NDS32. * nds32-tdep.c: New file. * nds32-tdep.h: New file. * features/Makefile (XMLTOC): Add nds32.xml. * features/nds32-core.xml: New file. * features/nds32-fpu.xml: New file. * features/nds32-system.xml: New file. * features/nds32.c: New file (generated). * features/nds32.xml: New file. gdb/doc/ChangeLog: * gdb.texinfo (Standard Target Features): Document NDS32 features. (NDS32 Features): New Section. gdb/testsuite/ChangeLog: * gdb.base/float.exp: Add target check for nds32*-*-*. * gdb.xml/tdesc-regs.exp: Set core-regs for nds32*-*-*.
2016-06-09Add negative repeat count to 'x' commandToshihito Kikuchi2-1/+18
This change adds support for specifying a negative repeat count to all the formats of the 'x' command to examine memory backward. A new testcase 'examine-backward' is added to cover this new feature. Here's the example output from the new feature: <format 'i'> (gdb) bt #0 Func1 (n=42, p=0x40432e "hogehoge") at main.cpp:5 #1 0x00000000004041fa in main (argc=1, argv=0x7fffffffdff8) at main.cpp:19 (gdb) x/-4i 0x4041fa 0x4041e5 <main(int, char**)+11>: mov %rsi,-0x10(%rbp) 0x4041e9 <main(int, char**)+15>: lea 0x13e(%rip),%rsi 0x4041f0 <main(int, char**)+22>: mov $0x2a,%edi 0x4041f5 <main(int, char**)+27>: callq 0x404147 <format 'x'> (gdb) x/-4xw 0x404200 0x4041f0 <main(int, char**)+22>: 0x00002abf 0xff4de800 0x76e8ffff 0xb8ffffff (gdb) x/-4 0x4041e0 <main(int, char**)+6>: 0x7d8910ec 0x758948fc 0x358d48f0 0x0000013e gdb/ChangeLog: * NEWS: Mention that GDB now supports a negative repeat count in the 'x' command. * printcmd.c (decode_format): Allow '-' in the parameter "string_ptr" to accept a negative repeat count. (find_instruction_backward): New function. (read_memory_backward): New function. (integer_is_zero): New function. (find_string_backward): New function. (do_examine): Use new functions to examine memory backward. (_initialize_printcmd): Mention that 'x' command supports a negative repeat count. gdb/doc/ChangeLog: * gdb.texinfo (Examining Memory): Document negative repeat count in the 'x' command. gdb/testsuite/ChangeLog: * gdb.base/examine-backward.c: New file. * gdb.base/examine-backward.exp: New file.
2016-06-06Add method/format information to =record-startedSimon Marchi3-2/+19
Eclipse CDT now supports enabling execution recording using two methods (full and btrace) and both formats for btrace (bts and pt). In the event that recording is enabled behind the back of the GUI (by the user on the command line, or a script), we need to know which method/format are being used, so it can be correctly reflected in the interface. This patch adds this information to the =record-started async record. Before: =record-started,thread-group="i1" After: =record-started,thread-group="i1",method="btrace",format="bts" =record-started,thread-group="i1",method="btrace",format="pt" =record-started,thread-group="i1",method="full" The "format" field is only present when the current method supports multiple formats (only the btrace method as of now). gdb/ChangeLog: * NEWS: Mention the new fields in =record-started. * common/btrace-common.h (btrace_format_short_string): New function declaration. * common/btrace-common.c (btrace_format_short_string): New function. * mi/mi-interp.c (mi_record_changed): Output method and format fields in the =record-started record. * record-btrace.c (record_btrace_open): Adapt record_changed notification. * record-full.c (record_full_open): Likewise. * record.c (cmd_record_stop): Likewise. gdb/doc/ChangeLog: * gdb.texinfo (GDB/MI Async Records): Document method and format fields in =record-started. * observer.texi (record_changed): Add method and format parameters. gdb/testsuite/ChangeLog: * gdb.mi/mi-record-changed.exp: Adjust =record-started output matching.
2016-05-27Improve documentation of general query packetsEli Zaretskii2-51/+57
gdb/doc/ChangeLog: * gdb.texinfo (General Query Packets): Move the description of the response before the long list of the specific 'read' and 'write' requests.
2016-05-24Fix PR python/17981Tom Tromey2-1/+8
PR python/17981 notes that gdb.breakpoints() returns None when there are no breakpoints; whereas an empty list or tuple would be more in keeping with Python and the documentation. This patch fixes the bug by changing the no-breakpoint return to make an empty tuple. Built and regtested on x86-64 Fedora 23. 2016-05-23 Tom Tromey <tom@tromey.com> PR python/17981: * python/py-breakpoint.c (gdbpy_breakpoints): Return a new tuple when there are no breakpoints. 2016-05-23 Tom Tromey <tom@tromey.com> * python.texi (Basic Python): Document gdb.breakpoints return. 2016-05-23 Tom Tromey <tom@tromey.com> PR python/17981: * gdb.python/py-breakpoint.exp (test_bkpt_basic): Add test for no-breakpoint case.
2016-05-24PR gdb/19194 - fix typo in the manualTom Tromey2-1/+6
PR gdb/19194 points out a typo in the documentation. I'm checking this in as obvious. 2016-05-24 Tom Tromey <tom@tromey.com> PR gdb/19194: * gdb.texinfo (gdb man): Fix typo.
2016-05-17Add Rust documentationTom Tromey2-1/+100
This patch adds documentation for the new Rust support in gdb. 2016-05-17 Tom Tromey <tom@tromey.com> * NEWS: Add Rust item. 2016-05-17 Tom Tromey <tom@tromey.com> * gdb.texinfo (Supported Languages): Mention Rust. Update menu. (Rust): New node.
2016-05-17Add self-test framework to gdbTom Tromey2-0/+9
I wanted to unit test the Rust lexer, so I added a simple unit testing command to gdb. The intent is that self tests will only be compiled into gdb in development mode. In release mode they simply won't exist. So, this exposes $development to C code as GDB_SELF_TEST. In development mode, test functions are registered with the self test module. A test function is just a function that does some checks, and throws an exception on failure. Then this adds a new "maint selftest" command which invokes the test functions, and a new dejagnu test case that invokes it. 2016-05-17 Tom Tromey <tom@tromey.com> * NEWS: Add "maint selftest" entry. * selftest.h: New file. * selftest.c: New file. * maint.c: Include selftest.h. (maintenance_selftest): New function. (_initialize_maint_cmds): Add "maint selftest" command. * configure.ac (GDB_SELF_TEST): Maybe define. * config.in, configure: Rebuild. * Makefile.in (SFILES): Add selftest.c. (COMMON_OBS): Add selftest.o. 2016-05-17 Tom Tromey <tom@tromey.com> * gdb.texinfo (Maintenance Commands): Document "maint selftest". 2016-05-17 Tom Tromey <tom@tromey.com> * gdb.gdb/unittest.exp: New file.
2016-04-27Tweak doc on command tfindYao Qi2-1/+7
Hi, command "tfind" will find the first trace snapshot if no trace snapshot is selected, but this behavior isn't documented. This patch completes the doc of command "tfind" without argument. gdb/doc: 2016-04-27 Yao Qi <yao.qi@linaro.org> * gdb.texinfo (tfind): Complete doc about tfind without argument.
2016-04-13Fix zero_ext documentationAntoine Tremblay2-2/+5
This patch fixes the documentation for the zero_ext bytecode description. It removes parts that seemed like a copy/paste from ext, since zero_ext zeros the bits to the left. gdb/doc/ChangeLog: * agentexpr.texi (zero_ext): Fix zero_ext description.
2016-03-31Remove support for "target m32rsdi" and "target mips/pmon/ddb/rockhopper/lsi"Pedro Alves2-162/+7
This removes support for: | target | source | |-------------------+-----------------------| | target m32rsdi | gdb/remote-m32r-sdi.c | | target mips | gdb/remote-mips.c | | target pmon | gdb/remote-mips.c | | target ddb | gdb/remote-mips.c | | target rockhopper | gdb/remote-mips.c | | target lsi | gdb/remote-mips.c | That is: - Remote M32R debugging over SDI. - Debugging boards using the MIPS remote debugging protocol over a serial line, PMON, and a few variants. These are the last non-"target remote" remote targets in the tree, if you don't count "target sim". Refs: https://sourceware.org/ml/gdb/2016-03/msg00004.html https://sourceware.org/ml/gdb-patches/2016-03/msg00580.html gdb/ChangeLog: 2016-03-31 Pedro Alves <palves@redhat.com> * NEWS: Mention that support for "target m32rsdi", "target mips", "target pmon", "target ddb", "target rockhopper", and "target lsi" was removed. * Makefile.in (ALL_TARGET_OBS): Remove remote-m32r-sdi.o and remote-mips.o. (ALLDEPFILES): Remove remote-m32r-sdi.c and remote-mips.c. * configure.tgt: Remove all references to remote-m32r-sdi.o and remote-mips.o. * mips-tdep.c (deprecated_mips_set_processor_regs_hack): Delete function. * mips-tdep.h (deprecated_mips_set_processor_regs_hack): Delete declaration. * remote-m32r-sdi.c, remote-mips.c: Delete files. * symfile.c (generic_load, generic_load): Remove comments. gdb/doc/ChangeLog: 2016-03-31 Pedro Alves <palves@redhat.com> * gdb.texinfo (M32R/SDI): Delete node. (MIPS Embedded): Remove references to the MIPS remote debugging protocol, PMON and variants, and the associated commands.
2016-03-15Extend flags to support multibit and enum bitfields.Doug Evans2-22/+111
gdb/ChangeLog: Extend flags to support multibit and enum bitfields. NEWS: Document new features. * c-typeprint.c (c_type_print_varspec_prefix): Handle TYPE_CODE_FLAGS. (c_type_print_varspec_suffix, c_type_print_base): Ditto. * gdbtypes.c (arch_flags_type): Don't assume all fields are one bit. (append_flags_type_field): New function. (append_flags_type_flag): Call it. * gdbtypes.h (append_flags_type_field): Declare. * target-descriptions.c (struct tdesc_type_flag): Delete. (enum tdesc_type_kind) <TDESC_TYPE_BOOL>: New enum value. (enum tdesc_type_kind) <TDESC_TYPE_ENUM>: Ditto. (struct tdesc_type) <u.f>: Delete. (tdesc_predefined_types): Add "bool". (tdesc_predefined_type): New function. (tdesc_gdb_type): Handle TDESC_TYPE_BOOL, TDESC_TYPE_ENUM. Update TDESC_TYPE_FLAGS support. (tdesc_free_type): Handle TDESC_TYPE_ENUM. Update TDESC_TYPE_FLAGS. (tdesc_create_flags): Update. (tdesc_create_enum): New function. (tdesc_add_field): Initialize start,end to -1. (tdesc_add_typed_bitfield): New function. (tdesc_add_bitfield): Call it. (tdesc_add_flag): Allow TDESC_TYPE_STRUCT. Update. (tdesc_add_enum_value): New function. (maint_print_c_tdesc_cmd): Fold TDESC_TYPE_FLAGS support into TDESC_TYPE_STRUCT. Handle TDESC_TYPE_ENUM. * target-descriptions.h (tdesc_create_enum): Declare. (tdesc_add_typed_bitfield, tdesc_add_enum_value): Declare. * valprint.c (generic_val_print_enum_1): New function. (generic_val_print_enum): Call it. (val_print_type_code_flags): Make static. Handle multibit bitfields and enum bitfields. * valprint.h (val_print_type_code_flags): Delete. * xml-tdesc.c (struct tdesc_parsing_data) <current_type_is_flags>: Delete. All uses removed. (tdesc_start_enum): New function. (tdesc_start_field): Handle multibit and enum bitfields. (tdesc_start_enum_value): New function. (enum_value_attributes, enum_children, enum_attributes): New static globals. (feature_children): Add "enum". * features/gdb-target.dtd (enum, evalue): New elements. gdb/doc/ChangeLog: * gdb.texinfo (Target Descriptions): New menu item "Enum Target Types". (Target Description Format): Mention enum types. Update docs on flags types. (Predefined Target Types): Add "bool". (Enum Target Types): New node. gdb/testsuite/ChangeLog: * gdb.xml/extra-regs.xml: Add enum, mixed_flags values. * gdb.xml/tdesc-regs.exp (load_description): New arg xml_file. All callers updated. Add tests for enums, mixed flags register.
2016-03-15Fix typo in previous gdb/doc/ commitPedro Alves2-1/+5
Should be s/reliability/reliably/. gdb/doc/ChangeLog: 2016-03-15 Pedro Alves <palves@redhat.com> * gdb.texinfo (Tracepoint Actions): Fix typo.
2016-03-15Document possible unreliability of '$_ret'Pedro Alves2-0/+14
gdb/doc/ChangeLog: 2016-03-15 Pedro Alves <palves@redhat.com> Andreas Arnez <arnez@linux.vnet.ibm.com> Marcin Kościelnicki <koriakin@0x04.net> * gdb.texinfo (Tracepoint Actions): Document possible unreliability of '$_ret'.
2016-03-11gdb: New maint info line-table command.Andrew Burgess2-0/+14
Add a new command 'maint info line-table' to display the contents of GDB's internal line table structure. Useful when trying to understand problems (within gdb) relating to line tables. gdb/ChangeLog: * symmisc.c (maintenance_info_line_tables): New function. (maintenance_print_one_line_table): New function. (_initialize_symmisc): Register 'maint info line-table' command. * NEWS: Mention new command. gdb/doc/ChangeLog: * gdb.texinfo (Symbols): Document new 'maint info line-table' command. gdb/testsuite/ChangeLog: * gdb.base/maint.exp: New tests for 'maint info line-table'.
2016-03-10Add $_as_string convenience functionSimon Marchi2-0/+17
This patch is a follow-up to "Add printf format specifier for printing enumerator": https://sourceware.org/ml/gdb-patches/2016-02/msg00144.html Instead of having a solution specific to the printf command, Pedro suggested adding a general purpose function $_as_string() that would cover this use case and more. So, in order to print the textual label of an enum, one can use: (gdb) printf "Visiting node of type %s\n", $_as_string(node) Visiting node of type NODE_INTEGER gdb/ChangeLog: * data-directory/Makefile.in (PYTHON_FILE_LIST): Install gdb/function/as_string.py. * python/lib/gdb/function/as_string.py: New file. * NEWS: Mention the new $_as_string function. gdb/testsuite/ChangeLog: * gdb.python/py-as-string.exp: New file. * gdb.python/py-as-string.c: New file. gdb/doc/ChangeLog: * gdb.texinfo (Convenience Functions): Document $_as_string.
2016-02-23Extend "skip" command to support -file, -gfile, -function, -rfunction.Doug Evans2-18/+92
gdb/ChangeLog: Extend "skip" command to support -file, -gfile, -function, -rfunction. * NEWS: Document new features. * skip.c: #include "fnmatch.h", "gdb_regex.h". (skiplist_entry) <file>: Renamed from filename. <function>: Renamed from function_name. <file_is_glob, function_is_regexp>: New members. <compiled_function_regexp, compiled_function_regexp_is_valid>: New members. (make_skip_entry): New function. (free_skiplist_entry, free_skiplist_entry_cleanup): New functions. (make_free_skiplist_entry_cleanup): New function. (skip_file_command): Update. (skip_function, skip_function_command): Update. (compile_skip_regexp): New functions. (skip_command): Add support for new options. (skip_info): Update. (skip_file_p, skip_gfile_p): New functions. (skip_function_p, skip_rfunction_p): New functions. (function_name_is_marked_for_skip): Update and simplify. (_initialize_step_skip): Update. * symtab.c: #include "fnmatch.h". (compare_glob_filenames_for_search): New function. * symtab.h (compare_glob_filenames_for_search): Declare. * utils.c (count_path_elements): New function. (strip_leading_path_elements): New function. * utils.h (count_path_elements): Declare. (strip_leading_path_elements): Declare. gdb/doc/ChangeLog: * gdb.texinfo (Skipping Over Functions and Files): Document new options to "skip" command. Update docs of output of "info skip". gdb/testsuite/ChangeLog: * gdb.base/skip.c (test_skip): New function. (end_test_skip_file_and_function): New function. (test_skip_file_and_function): New function. * gdb.base/skip1.c (test_skip): New function. (skip1_test_skip_file_and_function): New function. * gdb.base/skip.exp: Add tests for new skip options. * gdb.base/skip-solib.exp: Update expected output. * gdb.perf/skip-command.cc: New file. * gdb.perf/skip-command.exp: New file. * gdb.perf/skip-command.py: New file.
2016-02-18Intel MPX bound violation handlingWalfred Tedeschi2-0/+32
With Intel Memory Protection Extensions it was introduced the concept of boundary violation. A boundary violations is presented to the inferior as a segmentation fault having SIGCODE 3. This patch adds a handler for a boundary violation extending the information displayed when a bound violation is presented to the inferior. In the stop mode case the debugger will also display the kind of violation: "upper" or "lower", bounds and the address accessed. On no stop mode the information will still remain unchanged. Additional information about bound violations are not meaningful in that case user does not know the line in which violation occurred as well. When the segmentation fault handler is stop mode the out puts will be changed as exemplified below. The usual output of a segfault is: Program received signal SIGSEGV, Segmentation fault 0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050, c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68 68 value = *(p + len); In case it is a bound violation it will be presented as: Program received signal SIGSEGV, Segmentation fault Upper bound violation while accessing address 0x7fffffffc3b3 Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3] 0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050, c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68 68 value = *(p + len); In mi mode the output of a segfault is: *stopped,reason="signal-received",signal-name="SIGSEGV", signal-meaning="Segmentation fault", frame={addr="0x0000000000400d7c", func="upper",args=[{name="p", value="0x603010"},{name="a",value="0x603030"} ,{name="b",value="0x603050"}, {name="c",value="0x603070"}, {name="d",value="0x603090"},{name="len",value="7"}], file="i386-mpx-sigsegv.c",fullname="i386-mpx-sigsegv.c",line="68"}, thread-id="1",stopped-threads="all",core="6" in the case of a bound violation: *stopped,reason="signal-received",signal-name="SIGSEGV", signal-meaning="Segmentation fault", sigcode-meaning="Upper bound violation", lower-bound="0x603010",upper-bound="0x603023",bound-access="0x60302f", frame={addr="0x0000000000400d7c",func="upper",args=[{name="p", value="0x603010"},{name="a",value="0x603030"},{name="b",value="0x603050"}, {name="c",value="0x603070"},{name="d",value="0x603090"}, {name="len",value="7"}],file="i386-mpx-sigsegv.c", fullname="i386-mpx-sigsegv.c",line="68"},thread-id="1", stopped-threads="all",core="6" 2016-02-18 Walfred Tedeschi <walfred.tedeschi@intel.com> gdb/ChangeLog: * NEWS: Add entry for bound violation. * amd64-linux-tdep.c (amd64_linux_init_abi_common): Add handler for segmentation fault. * gdbarch.sh (handle_segmentation_fault): New. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * i386-linux-tdep.c (i386_linux_handle_segmentation_fault): New. (SIG_CODE_BONDARY_FAULT): New define. (i386_linux_init_abi): Use i386_mpx_bound_violation_handler. * i386-linux-tdep.h (i386_linux_handle_segmentation_fault) New. * i386-tdep.c (i386_mpx_enabled): Add as external. * i386-tdep.c (i386_mpx_enabled): Add as external. * infrun.c (handle_segmentation_fault): New function. (print_signal_received_reason): Use handle_segmentation_fault. gdb/testsuite/ChangeLog: * gdb.arch/i386-mpx-sigsegv.c: New file. * gdb.arch/i386-mpx-sigsegv.exp: New file. * gdb.arch/i386-mpx-simple_segv.c: New file. * gdb.arch/i386-mpx-simple_segv.exp: New file. gdb/doc/ChangeLog: * gdb.texinfo (Signals): Add bound violation display hints for a SIGSEGV.
2016-02-18gdb/doc: Add documentation for tfile description section lines.Marcin Kościelnicki2-1/+37
gdb/doc/ChangeLog: * gdb.texinfo (Trace File Format): Add documentation for description section lines.
2016-02-10gdb.trace: Use g packet order in tfile_fetch_registers.Marcin Kościelnicki2-2/+6
tfile_fetch_registers currently wrongly fetches registers using gdb order instead of g packet order. On x86_64 with AVX, this causes problems with ymm*h and orig_rax registers: gdb has ymm*h first, while g packet has orig_rax first. gdb/ChangeLog: * tracefile-tfile.c (tfile_fetch_registers): Use g packet order instead of gdb order. gdb/doc/ChangeLog: * gdb.texinfo (Trace File Format): Remove misleading information about register block ordering.
2016-02-01gdb.texinfo (Value Sizes): Fix typo.Doug Evans2-1/+5
2016-02-01gdb.texinfo (Skipping Over Functions and Files): Fix typo.Doug Evans2-1/+5
2016-02-01gdb: New set/show max-value-size command.Andrew Burgess2-0/+47
For languages with dynamic types, an incorrect program, or uninitialised variables within a program, could result in an incorrect, overly large type being associated with a value. Currently, attempting to print such a variable will result in gdb trying to allocate an overly large buffer. If this large memory allocation fails then the result can be gdb either terminating, or (due to memory contention) becoming unresponsive for the user. A new user visible variable in gdb helps guard against such problems, two new commands are available: set max-value-size show max-value-size The 'max-value-size' is the maximum size of memory in bytes that gdb will allocate for the contents of a value. Any attempt to allocate a value with a size greater than this will result in an error. The initial default for this limit is set at 64k, this is based on a similar limit that exists within the ada specific code. It is possible for the user to set max-value-size to unlimited, in which case the old behaviour is restored. gdb/ChangeLog: * value.c (max_value_size): New variable. (MIN_VALUE_FOR_MAX_VALUE_SIZE): New define. (show_max_value_size): New function. (check_type_length_before_alloc): New function. (allocate_value_contents): Call check_type_length_before_alloc. (set_value_enclosing_type): Likewise. (_initialize_values): Add set/show handler for max-value-size. * NEWS: Mention new set/show command. gdb/doc/ChangeLog: * gdb.texinfo (Value Sizes): New section. (Data): Add the 'Value Sizes' node to the menu. gdb/testsuite/ChangeLog: * gdb.base/max-value-size.c: New file. * gdb.base/max-value-size.exp: New file. * gdb.base/huge.exp: Disable max-value-size for this test.
2016-01-26Fix subject verb agreement in the description of several debug settings.John Baldwin2-7/+11
gdb/doc/ChangeLog: * gdb.texinfo (Debugging Output): Fix subject verb disagreements.
2016-01-19Add support for LWP-based threads on FreeBSD.John Baldwin2-0/+9
Older versions of FreeBSD supported userland threading via a pure user-space threading library (N threads scheduled on 1 process) and a N:M model (N threads scheduled on M LWPs). However, modern FreeBSD versions only support a M:M threading model where each user thread is backed by a dedicated LWP. This thread target only supports this threading model. It also uses ptrace to query and alter LWP state directly rather than using libthread_db to simplify the implementation. FreeBSD recently gained support for reporting LWP events (birth and death of LWPs). GDB will use LWP events when present. For older systems it fetches the list of LWPs in the to_update_thread_list target op to update the list of threads on each stop. This target supports scheduler locking by using ptrace to suspend individual LWPs as necessary before resuming a process. gdb/ChangeLog: * configure.ac: Check for support for LWP names on FreeBSD. * fbsd-nat.c [PT_LWPINFO] New variable debug_fbsd_lwp. [TDP_RFPPWAIT || HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME] (fbsd_fetch_kinfo_proc): Move function earlier. [PT_LWPINFO] (fbsd_thread_alive): New function. [PT_LWPINFO] (fbsd_pid_to_str): New function. [HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME] (fbsd_thread_name): New function. [PT_LWP_EVENTS] (fbsd_enable_lwp_events): New function. [PT_LWPINFO] (fbsd_add_threads): New function. [PT_LWPINFO] (fbsd_update_thread_list): New function. [PT_LWPINFO] New variable super_resume. [PT_LWPINFO] (resume_one_thread_cb): New function. [PT_LWPINFO] (resume_all_threads_cb): New function. [PT_LWPINFO] (fbsd_resume): New function. (fbsd_remember_child): Save full ptid instead of plain pid. (fbsd_is_child_pending): Return ptid of saved child process. (fbsd_wait): Include lwp in returned ptid and switch to LWP ptid on first stop. [PT_LWP_EVENTS] Handle LWP events. [TDP_RFPPWAIT] Include LWP in child ptid. (fbsd_post_startup_inferior) [PT_LWP_EVENTS]: Enable LWP events. (fbsd_post_attach) [PT_LWP_EVENTS]: Enable LWP events. Add threads for existing processes. (fbsd_nat_add_target) [PT_LWPINFO]: Set "to_thread_alive" to "fbsd_thread_alive". Set "to_pid_to_str" to "fbsd_pid_to_str". [HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME]: Set "to_thread_name" to "fbsd_thread_name". [PT_LWPINFO]: Set "to_update_thread_list" to "fbsd_update_thread_list". Set "to_has_thread_control" to "tc_schedlock". Set "to_resume" to "fbsd_resume". (_initialize_fbsd_nat): New function. * configure: Regenerate. * config.in: Regenerate. gdb/doc/ChangeLog: * gdb.texinfo (Debugging Output): Document "set/show debug fbsd-lwp".
2016-01-18Fix PR threads/19422 - show which thread caused stopPedro Alves2-0/+19
This commit changes GDB like this: - Program received signal SIGINT, Interrupt. + Thread 1 "main" received signal SIGINT, Interrupt. - Breakpoint 1 at 0x40087a: file threads.c, line 87. + Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file threads.c, line 87. ... once the program goes multi-threaded. Until GDB sees a second thread spawn, the output is still the same as before, per the discussion back in 2012: https://www.sourceware.org/ml/gdb/2012-11/msg00010.html This helps non-stop mode, where you can't easily tell which thread hit a breakpoint or received a signal: (gdb) info threads Id Target Id Frame * 1 Thread 0x7ffff7fc1740 (LWP 19362) "main" (running) 2 Thread 0x7ffff7fc0700 (LWP 19366) "foo" (running) 3 Thread 0x7ffff77bf700 (LWP 19367) "bar" (running) (gdb) Program received signal SIGUSR1, User defined signal 1. 0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92 92 lll_wait_tid (pd->tid); (gdb) b threads.c:87 Breakpoint 1 at 0x40087a: file threads.c, line 87. (gdb) Breakpoint 1, thread_function1 (arg=0x1) at threads.c:87 87 usleep (1); /* Loop increment. */ The best the user can do is run "info threads" and try to figure things out. It actually also affects all-stop mode, in case of "handle SIG print nostop": ... Program received signal SIGUSR1, User defined signal 1. Program received signal SIGUSR1, User defined signal 1. Program received signal SIGUSR1, User defined signal 1. Program received signal SIGUSR1, User defined signal 1. ... The above doesn't give any clue that these were different threads getting the SIGUSR1 signal. I initially thought of lowercasing "breakpoint" in "Thread 3 hit Breakpoint 1" but then after trying it I realized that leaving "Breakpoint" uppercase helps the eye quickly find the relevant information. It's also easier to implement not showing anything about threads until the program goes multi-threaded this way. Here's a larger example session in non-stop mode: (gdb) c -a& Continuing. (gdb) interrupt -a (gdb) Thread 1 "main" stopped. 0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92 92 lll_wait_tid (pd->tid); Thread 2 "foo" stopped. 0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) Thread 3 "bar" stopped. 0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) b threads.c:87 Breakpoint 4 at 0x40087a: file threads.c, line 87. (gdb) b threads.c:67 Breakpoint 5 at 0x400811: file threads.c, line 67. (gdb) c -a& Continuing. (gdb) Thread 3 "bar" hit Breakpoint 4, thread_function1 (arg=0x1) at threads.c:87 87 usleep (1); /* Loop increment. */ Thread 2 "foo" hit Breakpoint 5, thread_function0 (arg=0x0) at threads.c:68 68 (*myp) ++; info threads Id Target Id Frame * 1 Thread 0x7ffff7fc1740 (LWP 31957) "main" (running) 2 Thread 0x7ffff7fc0700 (LWP 31961) "foo" thread_function0 (arg=0x0) at threads.c:68 3 Thread 0x7ffff77bf700 (LWP 31962) "bar" thread_function1 (arg=0x1) at threads.c:87 (gdb) shell kill -SIGINT 31957 (gdb) Thread 1 "main" received signal SIGINT, Interrupt. 0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92 92 lll_wait_tid (pd->tid); info threads Id Target Id Frame * 1 Thread 0x7ffff7fc1740 (LWP 31957) "main" 0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92 2 Thread 0x7ffff7fc0700 (LWP 31961) "foo" thread_function0 (arg=0x0) at threads.c:68 3 Thread 0x7ffff77bf700 (LWP 31962) "bar" thread_function1 (arg=0x1) at threads.c:87 (gdb) t 2 [Switching to thread 2, Thread 0x7ffff7fc0700 (LWP 31961)] #0 thread_function0 (arg=0x0) at threads.c:68 68 (*myp) ++; (gdb) catch syscall Catchpoint 6 (any syscall) (gdb) c& Continuing. (gdb) Thread 2 "foo" hit Catchpoint 6 (call to syscall nanosleep), 0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81 81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) I'll work on documentation next if this looks agreeable. This patch applies on top of the star wildcards thread IDs series: https://sourceware.org/ml/gdb-patches/2016-01/msg00291.html For convenience, I've pushed this to the users/palves/show-which-thread-caused-stop branch. gdb/doc/ChangeLog: 2016-01-18 Pedro Alves <palves@redhat.com> * gdb.texinfo (Threads): Mention that GDB displays the ID and name of the thread that hit a breakpoint or received a signal. gdb/ChangeLog: 2016-01-18 Pedro Alves <palves@redhat.com> * NEWS: Mention that GDB now displays the ID and name of the thread that hit a breakpoint or received a signal. * break-catch-sig.c (signal_catchpoint_print_it): Use maybe_print_thread_hit_breakpoint. * break-catch-syscall.c (print_it_catch_syscall): Likewise. * break-catch-throw.c (print_it_exception_catchpoint): Likewise. * breakpoint.c (maybe_print_thread_hit_breakpoint): New function. (print_it_catch_fork, print_it_catch_vfork, print_it_catch_solib) (print_it_catch_exec, print_it_ranged_breakpoint) (print_it_watchpoint, print_it_masked_watchpoint, bkpt_print_it): Use maybe_print_thread_hit_breakpoint. * breakpoint.h (maybe_print_thread_hit_breakpoint): Declare. * gdbthread.h (show_thread_that_caused_stop): Declare. * infrun.c (print_signal_received_reason): Print which thread received signal. * thread.c (show_thread_that_caused_stop): New function. gdb/testsuite/ChangeLog: 2016-01-18 Pedro Alves <palves@redhat.com> * gdb.base/async-shell.exp: Adjust expected output. * gdb.base/dprintf-non-stop.exp: Adjust expected output. * gdb.base/siginfo-thread.exp: Adjust expected output. * gdb.base/watchpoint-hw-hit-once.exp: Adjust expected output. * gdb.java/jnpe.exp: Adjust expected output. * gdb.threads/clone-new-thread-event.exp: Adjust expected output. * gdb.threads/continue-pending-status.exp: Adjust expected output. * gdb.threads/leader-exit.exp: Adjust expected output. * gdb.threads/manythreads.exp: Adjust expected output. * gdb.threads/pthreads.exp: Adjust expected output. * gdb.threads/schedlock.exp: Adjust expected output. * gdb.threads/siginfo-threads.exp: Adjust expected output. * gdb.threads/signal-command-multiple-signals-pending.exp: Adjust expected output. * gdb.threads/signal-delivered-right-thread.exp: Adjust expected output. * gdb.threads/sigthread.exp: Adjust expected output. * gdb.threads/watchpoint-fork.exp: Adjust expected output.
2016-01-15Star wildcard ranges (e.g., "info thread 2.*")Pedro Alves2-10/+33
Add support for specifying "all threads of inferior N", by writing "*" as thread number/range in thread ID lists. E.g., "info threads 2.*" or "thread apply 2.* bt". gdb/ChangeLog: 2016-01-15 Pedro Alves <palves@redhat.com> * NEWS: Mention star wildcard ranges. * cli/cli-utils.c (get_number_or_range): Check state->in_range first. (number_range_setup_range): New function. * cli/cli-utils.h (number_range_setup_range): New declaration. * thread.c (thread_apply_command): Support star TID ranges. * tid-parse.c (tid_range_parser_finished) (tid_range_parser_string, tid_range_parser_skip) (get_tid_or_range, get_tid_or_range): Handle TID_RANGE_STATE_STAR_RANGE. (tid_range_parser_star_range): New function. * tid-parse.h (enum tid_range_state) <TID_RANGE_STATE_STAR_RANGE>: New value. (tid_range_parser_star_range): New declaration. gdb/doc/ChangeLog: 2016-01-15 Pedro Alves <palves@redhat.com> * gdb.texinfo (Threads) <thread ID lists>: Document star ranges. gdb/testsuite/ChangeLog: 2016-01-15 Pedro Alves <palves@redhat.com> * gdb.multi/tids.exp: Test star wildcard ranges.
2016-01-13Add $_gthread convenience variablePedro Alves2-2/+13
This commit adds a new $_gthread convenience variable, that is like $_thread, but holds the current thread's global thread id. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention $_gthread. * gdbthread.h (struct thread_info) <global_num>: Mention $_gthread. * thread.c (thread_num_make_value_helper): New function. (thread_id_make_value): Delete. (thread_id_per_inf_num_make_value, global_thread_id_make_value): New. (thread_funcs): Adjust. (gthread_funcs): New. (_initialize_thread): Register $_gthread variable. gdb/testsuite/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.base/default.exp: Expect $_gthread as well. * gdb.multi/tids.exp: Test $_gthread. * gdb.threads/thread-specific.exp: Test $_gthread. gdb/doc/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.texinfo (Threads): Document the $_gthread convenience variable. (Convenience Vars): Likewise.
2016-01-13Implement "info threads -gid"Pedro Alves2-6/+17
This commit makes global thread IDs optionaly visible in "info threads", with the new "-gid" switch: (gdb) info threads -gid Id GId Target Id Frame 1.1 1 Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running) 1.2 3 Thread 0x7ffff77c0700 (LWP 6028) "threads" (running) 1.3 4 Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running) 2.1 2 Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running) 2.2 5 Thread 0x7ffff77c0700 (LWP 6038) "threads" (running) * 2.3 6 Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running) (gdb) info threads Id Target Id Frame 1.1 Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running) 1.2 Thread 0x7ffff77c0700 (LWP 6028) "threads" (running) 1.3 Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running) 2.1 Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running) 2.2 Thread 0x7ffff77c0700 (LWP 6038) "threads" (running) * 2.3 Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running) No regressions on x86_64 Fedora 20. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention "info threads -gid". * gdbthread.h (struct thread_info) <global_num>: Mention "info threads -gid". * thread.c (info_threads_command): Handle "-gid". (_initialize_thread): Adjust "info threads" help string to mention -gid. gdb/testsuite/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.multi/tids.exp: Test "info threads -gid". gdb/doc/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.texinfo (Threads): Document "info threads -gid".
2016-01-13Add Python InferiorThread.global_num attributePedro Alves2-0/+14
This commit adds a new Python InferiorThread.global_num attribute. This can be used to pass the correct thread ID to Breakpoint.thread, which takes a global thread ID, not a per-inferior thread number. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention InferiorThread.global_num. * python/py-infthread.c (thpy_get_global_num): New function. (thread_object_getset): Register "global_num". gdb/testsuite/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.multi/tids.exp: Test InferiorThread.global_num and Breakpoint.thread. * gdb.python/py-infthread.exp: Test InferiorThread.global_num. gdb/doc/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * python.texi (Breakpoints In Python) <Breakpoint.thread>: Add anchor. (Threads In Python): Document new InferiorThread.global_num attribute.
2016-01-13Per-inferior/Inferior-qualified thread IDsPedro Alves4-85/+173
This commit changes GDB to track thread numbers per-inferior. Then, if you're debugging multiple inferiors, GDB displays "inferior-num.thread-num" instead of just "thread-num" whenever it needs to display a thread: (gdb) info inferiors Num Description Executable 1 process 6022 /home/pedro/gdb/tests/threads * 2 process 6037 /home/pedro/gdb/tests/threads (gdb) info threads Id Target Id Frame 1.1 Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running) 1.2 Thread 0x7ffff77c0700 (LWP 6028) "threads" (running) 1.3 Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running) 2.1 Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running) 2.2 Thread 0x7ffff77c0700 (LWP 6038) "threads" (running) * 2.3 Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running) (gdb) ... (gdb) thread 1.1 [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))] (gdb) ... etc. You can still use "thread NUM", in which case GDB infers you're referring to thread NUM of the current inferior. The $_thread convenience var and Python's InferiorThread.num attribute are remapped to the new per-inferior thread number. It's a backward compatibility break, but since it only matters when debugging multiple inferiors, I think it's worth doing. Because MI thread IDs need to be a single integer, we keep giving threads a global identifier, _in addition_ to the per-inferior number, and make MI always refer to the global thread IDs. IOW, nothing changes from a MI frontend's perspective. Similarly, since Python's Breakpoint.thread and Guile's breakpoint-thread/set-breakpoint-thread breakpoint methods need to work with integers, those are adjusted to work with global thread IDs too. Follow up patches will provide convenient means to access threads' global IDs. To avoid potencially confusing users (which also avoids updating much of the testsuite), if there's only one inferior and its ID is "1", IOW, the user hasn't done anything multi-process/inferior related, then the "INF." part of thread IDs is not shown. E.g,.: (gdb) info inferiors Num Description Executable * 1 process 15275 /home/pedro/gdb/tests/threads (gdb) info threads Id Target Id Frame * 1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40 (gdb) add-inferior Added inferior 2 (gdb) info threads Id Target Id Frame * 1.1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40 (gdb) No regressions on x86_64 Fedora 20. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention that thread IDs are now per inferior and global thread IDs. * Makefile.in (SFILES): Add tid-parse.c. (COMMON_OBS): Add tid-parse.o. (HFILES_NO_SRCDIR): Add tid-parse.h. * ada-tasks.c: Adjust to use ptid_to_global_thread_id. * breakpoint.c (insert_breakpoint_locations) (remove_threaded_breakpoints, bpstat_check_breakpoint_conditions) (print_one_breakpoint_location, set_longjmp_breakpoint) (check_longjmp_breakpoint_for_call_dummy) (set_momentary_breakpoint): Adjust to use global IDs. (find_condition_and_thread, watch_command_1): Use parse_thread_id. (until_break_command, longjmp_bkpt_dtor) (breakpoint_re_set_thread, insert_single_step_breakpoint): Adjust to use global IDs. * dummy-frame.c (pop_dummy_frame_bpt): Adjust to use ptid_to_global_thread_id. * elfread.c (elf_gnu_ifunc_resolver_stop): Likewise. * gdbthread.h (struct thread_info): Rename field 'num' to 'global_num. Add new fields 'per_inf_num' and 'inf'. (thread_id_to_pid): Rename thread_id_to_pid to global_thread_id_to_ptid. (pid_to_thread_id): Rename to ... (ptid_to_global_thread_id): ... this. (valid_thread_id): Rename to ... (valid_global_thread_id): ... this. (find_thread_id): Rename to ... (find_thread_global_id): ... this. (ALL_THREADS, ALL_THREADS_BY_INFERIOR): Declare. (print_thread_info): Add comment. * tid-parse.h: New file. * tid-parse.c: New file. * infcmd.c (step_command_fsm_prepare) (step_command_fsm_should_stop): Adjust to use the global thread ID. (until_next_command, until_next_command) (finish_command_fsm_should_stop): Adjust to use the global thread ID. (attach_post_wait): Adjust to check the inferior number too. * inferior.h (struct inferior) <highest_thread_num>: New field. * infrun.c (handle_signal_stop) (insert_exception_resume_breakpoint) (insert_exception_resume_from_probe): Adjust to use the global thread ID. * record-btrace.c (record_btrace_open): Use global thread IDs. * remote.c (process_initial_stop_replies): Also consider the inferior number. * target.c (target_pre_inferior): Clear the inferior's highest thread num. * thread.c (clear_thread_inferior_resources): Adjust to use the global thread ID. (new_thread): New inferior parameter. Adjust to use it. Set both the thread's global ID and the thread's per-inferior ID. (add_thread_silent): Adjust. (find_thread_global_id): New. (find_thread_id): Make static. Adjust to rename. (valid_thread_id): Rename to ... (valid_global_thread_id): ... this. (pid_to_thread_id): Rename to ... (ptid_to_global_thread_id): ... this. (thread_id_to_pid): Rename to ... (global_thread_id_to_ptid): ... this. Adjust. (first_thread_of_process): Adjust. (do_captured_list_thread_ids): Adjust to use global thread IDs. (should_print_thread): New function. (print_thread_info): Rename to ... (print_thread_info_1): ... this, and add new show_global_ids parameter. Handle it. Iterate over inferiors. (print_thread_info): Reimplement as wrapper around print_thread_info_1. (show_inferior_qualified_tids): New function. (print_thread_id): Use it. (tp_array_compar): Compare inferior numbers too. (thread_apply_command): Use tid_range_parser. (do_captured_thread_select): Use parse_thread_id. (thread_id_make_value): Adjust. (_initialize_thread): Adjust "info threads" help string. * varobj.c (struct varobj_root): Update comment. (varobj_create): Adjust to use global thread IDs. (value_of_root_1): Adjust to use global_thread_id_to_ptid. * windows-tdep.c (display_tib): No longer accept an argument. * cli/cli-utils.c (get_number_trailer): Make extern. * cli/cli-utils.h (get_number_trailer): Declare. (get_number_const): Adjust documentation. * mi/mi-cmd-var.c (mi_cmd_var_update_iter): Adjust to use global thread IDs. * mi/mi-interp.c (mi_new_thread, mi_thread_exit) (mi_on_normal_stop, mi_output_running_pid, mi_on_resume): * mi/mi-main.c (mi_execute_command, mi_cmd_execute): Likewise. * guile/scm-breakpoint.c (gdbscm_set_breakpoint_thread_x): Likewise. * python/py-breakpoint.c (bppy_set_thread): Likewise. * python/py-finishbreakpoint.c (bpfinishpy_init): Likewise. * python/py-infthread.c (thpy_get_num): Add comment and return the per-inferior thread ID. (thread_object_getset): Update comment of "num". gdb/testsuite/ChangeLog: 2016-01-07 Pedro Alves <palves@redhat.com> * gdb.base/break.exp: Adjust to output changes. * gdb.base/hbreak2.exp: Likewise. * gdb.base/sepdebug.exp: Likewise. * gdb.base/watch_thread_num.exp: Likewise. * gdb.linespec/keywords.exp: Likewise. * gdb.multi/info-threads.exp: Likewise. * gdb.threads/thread-find.exp: Likewise. * gdb.multi/tids.c: New file. * gdb.multi/tids.exp: New file. gdb/doc/ChangeLog: 2016-01-07 Pedro Alves <palves@redhat.com> * gdb.texinfo (Threads): Document per-inferior thread IDs, qualified thread IDs, global thread IDs and thread ID lists. (Set Watchpoints, Thread-Specific Breakpoints): Adjust to refer to thread IDs. (Convenience Vars): Document the $_thread convenience variable. (Ada Tasks): Adjust to refer to thread IDs. (GDB/MI Async Records, GDB/MI Thread Commands, GDB/MI Ada Tasking Commands, GDB/MI Variable Objects): Update to mention global thread IDs. * guile.texi (Breakpoints In Guile) <breakpoint-thread/set-breakpoint-thread breakpoint>: Mention global thread IDs instead of thread IDs. * python.texi (Threads In Python): Adjust documentation of InferiorThread.num. (Breakpoint.thread): Mention global thread IDs instead of thread IDs.
2016-01-13Add Python InferiorThread.inferior attributePedro Alves2-0/+10
So a script can easily get at a thread's inferior and its number. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention InferiorThread.inferior. * python/py-infthread.c (thpy_get_inferior): New. (thread_object_getset): Register "inferior". gdb/testsuite/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.python/py-infthread.exp: Test InferiorThread.inferior. gdb/doc/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * python.texi (Threads In Python): Document InferiorThread.inferior.
2016-01-13Add a new $_inferior convenience variablePedro Alves2-0/+16
Like $_thread, but holds the current inferior number. gdb/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * NEWS: Mention $_inferior. * inferior.c (inferior_id_make_value): New. (inferior_funcs): New. (_initialize_inferior): Create $_inferior variable. gdb/testsuite/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.base/default.exp: Expect $_inferior as well. * gdb.multi/base.exp: Test $_inferior. gdb/doc/ChangeLog: 2016-01-13 Pedro Alves <palves@redhat.com> * gdb.texinfo (Inferiors and Programs): Document the $_inferior convenience variable. (Convenience Vars): Likewise.
2016-01-12Implement 'catch syscall' for gdbserverJosh Stone2-0/+69
This adds a new QCatchSyscalls packet to enable 'catch syscall', and new stop reasons "syscall_entry" and "syscall_return" for those events. It is currently only supported on Linux x86 and x86_64. gdb/ChangeLog: 2016-01-12 Josh Stone <jistone@redhat.com> Philippe Waroquiers <philippe.waroquiers@skynet.be> * NEWS (Changes since GDB 7.10): Mention QCatchSyscalls and the syscall_entry and syscall_return stop reasons. Mention GDB support for remote catch syscall. * remote.c (PACKET_QCatchSyscalls): New enum. (remote_set_syscall_catchpoint): New function. (remote_protocol_features): New element for QCatchSyscalls. (remote_parse_stop_reply): Parse syscall_entry/return stops. (init_remote_ops): Install remote_set_syscall_catchpoint. (_initialize_remote): Config QCatchSyscalls. * linux-nat.h (struct lwp_info) <syscall_state>: Comment typo. gdb/doc/ChangeLog: 2016-01-12 Josh Stone <jistone@redhat.com> Philippe Waroquiers <philippe.waroquiers@skynet.be> * gdb.texinfo (Remote Configuration): List the QCatchSyscalls packet. (Stop Reply Packets): List the syscall entry and return stop reasons. (General Query Packets): Describe QCatchSyscalls, and add it to the table and the detailed list of stub features. gdb/gdbserver/ChangeLog: 2016-01-12 Josh Stone <jistone@redhat.com> Philippe Waroquiers <philippe.waroquiers@skynet.be> * inferiors.h: Include "gdb_vecs.h". (struct process_info): Add syscalls_to_catch. * inferiors.c (remove_process): Free syscalls_to_catch. * remote-utils.c (prepare_resume_reply): Report syscall_entry and syscall_return stops. * server.h (UNKNOWN_SYSCALL, ANY_SYSCALL): Define. * server.c (handle_general_set): Handle QCatchSyscalls. (handle_query): Report support for QCatchSyscalls. * target.h (struct target_ops): Add supports_catch_syscall. (target_supports_catch_syscall): New macro. * linux-low.h (struct linux_target_ops): Add get_syscall_trapinfo. (struct lwp_info): Add syscall_state. * linux-low.c (handle_extended_wait): Mark syscall_state as an entry. Maintain syscall_state and syscalls_to_catch across exec. (get_syscall_trapinfo): New function, proxy to the_low_target. (linux_low_ptrace_options): Enable PTRACE_O_TRACESYSGOOD. (linux_low_filter_event): Toggle syscall_state entry/return for syscall traps, and set it ignored for all others. (gdb_catching_syscalls_p): New function. (gdb_catch_this_syscall_p): New function. (linux_wait_1): Handle SYSCALL_SIGTRAP. (linux_resume_one_lwp_throw): Add PTRACE_SYSCALL possibility. (linux_supports_catch_syscall): New function. (linux_target_ops): Install it. * linux-x86-low.c (x86_get_syscall_trapinfo): New function. (the_low_target): Install it. gdb/testsuite/ChangeLog: 2016-01-12 Josh Stone <jistone@redhat.com> Philippe Waroquiers <philippe.waroquiers@skynet.be> * gdb.base/catch-syscall.c (do_execve): New variable. (main): Conditionally trigger an execve. * gdb.base/catch-syscall.exp: Enable testing for remote targets. (test_catch_syscall_execve): New, check entry/return across execve. (do_syscall_tests): Call test_catch_syscall_execve.
2016-01-12Remove trademark acknowledgements throughoutPedro Alves2-13/+17
The GNU Coding Standards say: "Please do not include any trademark acknowledgements in GNU software packages or documentation." gdb/ChangeLog: 2016-01-12 Pedro Alves <palves@redhat.com> Remove use of the registered trademark symbol throughout. gdb/gdbserver/ChangeLog: 2016-01-12 Pedro Alves <palves@redhat.com> Remove use of the registered trademark symbol throughout. gdb/doc/ChangeLog: 2016-01-12 Pedro Alves <palves@redhat.com> Remove use of the registered trademark symbol throughout.
2016-01-12[DOC] Interrupt when program is stoppedYao Qi2-1/+7
This patch changes the document that interrupt (ctrl-c) is not ignored when the program is stopped. When the interrupt was supported in remote target, people thought interrupt is meaningless when the program is stopped. See https://www.sourceware.org/ml/gdb/2005-11/msg00349.html https://www.sourceware.org/ml/gdb-patches/2005-11/msg00307.html recently we find it is hard to preserve this feature "ignore interrupt while program is stopped" when we fix some other bugs. See https://sourceware.org/ml/gdb-patches/2016-01/msg00039.html so we think we can go to the simpler approach "not ignoring ctrl-c when program is stopped". As a result, we tweak the documentation here. gdb/doc: 2016-01-12 Yao Qi <yao.qi@linaro.org> * gdb.texinfo (Interrupts): Update the document on handling interrupt when program is stopped.
2016-01-12Reapply: List inferiors/threads/pspaces in ascending orderPedro Alves1-4/+4
[This reapplies a change that was accidentally reverted with c0ecb95f3d.] Before: (gdb) info threads Id Target Id Frame 3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30 2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60 * 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92 After: (gdb) info threads Id Target Id Frame * 1 Thread 0x7ffff7fc5740 (LWP 29030) 0x0000003b37209237 in pthread_join (threadid=140737353893632, thread_return=0x0) at pthread_join.c:92 2 Thread 0x7ffff7fc4700 (LWP 29034) 0x000000000040087b in child_function_2 (arg=0x0) at foo.c:60 3 Thread 0x7ffff77c3700 (LWP 29035) callme () at foo.c:30 gdb/doc/ChangeLog: 2015-11-24 Pedro Alves <palves@redhat.com> PR 17539 * gdb.texinfo (Inferiors and Programs): Adjust "maint info program-spaces" example to ascending order listing. (Threads): Adjust "info threads" example to ascending order listing. (Forks): Adjust "info inferiors" example to ascending order listing. gdb/ChangeLog: 2015-11-24 Pedro Alves <palves@redhat.com> PR 17539 * inferior.c (add_inferior_silent): Append the new inferior to the end of the list. * progspace.c (add_program_space): Append the new pspace to the end of the list. * thread.c (new_thread): Append the new thread to the end of the list. gdb/testsuite/ChangeLog: 2015-11-24 Pedro Alves <palves@redhat.com> PR 17539 * gdb.base/foll-exec-mode.exp: Adjust to GDB listing inferiors and threads in ascending order. * gdb.base/foll-fork.exp: Likewise. * gdb.base/foll-vfork.exp: Likewise. * gdb.base/multi-forks.exp: Likewise. * gdb.mi/mi-nonstop.exp: Likewise. * gdb.mi/mi-nsintrall.exp: Likewise. * gdb.multi/base.exp: Likewise. * gdb.multi/multi-arch.exp: Likewise. * gdb.python/py-inferior.exp: Likewise. * gdb.threads/break-while-running.exp: Likewise. * gdb.threads/execl.exp: Likewise. * gdb.threads/gcore-thread.exp: Likewise. * gdb.threads/info-threads-cur-sal.exp: Likewise. * gdb.threads/kill.exp: Likewise. * gdb.threads/linux-dp.exp: Likewise. * gdb.threads/multiple-step-overs.exp: Likewise. * gdb.threads/next-bp-other-thread.exp: Likewise. * gdb.threads/step-bg-decr-pc-switch-thread.exp: Likewise. * gdb.threads/step-over-lands-on-breakpoint.exp: Likewise. * gdb.threads/step-over-trips-on-watchpoint.exp: Likewise. * gdb.threads/thread-find.exp: Likewise. * gdb.threads/tls.exp: Likewise. * lib/mi-support.exp (mi_reverse_list): Delete. (mi_check_thread_states): No longer reverse list.
2016-01-11testsuite: Fix false FAILs on too long base directoryJan Kratochvil1-4/+4
I was getting gu (print arg0)^M = 0x7fffffffdafb "/unsafebuild-x86_64-redhat-linux-gnu/gdb/testsuite.unix.-m64/outputs/gdb.guile/scm-value/scm-"...^M (gdb) FAIL: gdb.guile/scm-value.exp: verify dereferenced value python print (arg0)^M 0x7fffffffdafd "/unsafebuild-x86_64-redhat-linux-gnu/gdb/testsuite.unix.-m64/outputs/gdb.python/py-value/py-v"...^M (gdb) FAIL: gdb.python/py-value.exp: verify dereferenced value and also: (gdb) p argv[0]^M $2 = 0x7fffffffd832 "/home/jkratoch/redhat/gdb-test-", 'x' <repeats 169 times>...^M (gdb) FAIL: gdb.guile/scm-value.exp: argv[0] should be available on this target gdb/testsuite/ChangeLog 2016-01-11 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.guile/scm-value.exp (test_value_in_inferior): Set print elements and repeats to unlimited. * gdb.python/py-value.exp: Likewise. * lib/gdb.exp (gdb_has_argv0): Save and temporarily set print elements and repeats to unlimited.
2016-01-01GDB copyright headers update after running GDB's copyright.py script.Joel Brobecker15-19/+19
gdb/ChangeLog: Update year range in copyright notice of all files.
2015-12-14Target remote mode fork and exec event documentationDon Breazeal2-77/+202
This patch implements documentation updates for target remote mode fork and exec events. A summary of the rationale for the changes made here: * Connecting to a remote target -- explain that the two protocols exist. * Connecting in target remote mode -- explain invoking gdbserver for target remote mode, and move remote-specific text from original "Connecting to a remote target" section. * Connecting in target extended-remote mode -- promote this section from "Using the gdbserver Program | Running gdbserver | Multi-Process Mode for gdbserver". Put it next to the target remote mode section. * Host and target files -- collect paragraphs dealing with how to locate symbol files from original sections "Connecting to a remote target" and "Using the gdbserver program | Connecting to gdbserver". * Steps for connecting to a remote target -- used to be "Using the gdbserver program | Connecting to gdbserver" * Remote connection commands -- used to be the bulk of "Connecting to a remote target". Added "target extended-remote" commands and information. gdb/ChangeLog: * NEWS: Announce fork and exec event support for target remote. gdb/doc/ChangeLog: * gdb.texinfo (Forks): Correct Linux kernel version where fork and exec events are supported, add notes about support of these events in target remote mode. (Connecting): Reorganize and clarify distinctions between target remote, extended-remote, and multiprocess. Reorganize related text from separate sections into new sections. (Server): Note effects of target extended-remote mode. Delete section on Multi-Process Mode for gdbserver. Move some text to "Connecting" node.
2015-12-10[gdb/doc] Explain that there's always a threadPedro Alves2-18/+9
This warning is a few years out of date -- there's always a thread nowadays. gdb/doc/ChangeLog: * gdb.texinfo (Threads): Replace warning with explanation about single-threaded programs.
2015-12-10[gdb/doc] Remove references to no-longer-supported systemsPedro Alves2-40/+33
HP-UX and SGI/IRIX are no longer supported. Remove references throughout. AFAICS from the sources, "catch fork" seems to be supported in multiple Unix systems -- just remove the "only works on xxx" remarks. Update the list of supported shared library types. gdb/doc/ChangeLog: * gdb.texinfo (Threads): Remove mention of SGI. (Forks): Remove mention of HP-UX. (Breakpoints): Remove mention of HP-UX. (Set Watchpoints) <hardware watchpoints>: Don't mention HP-UX. Reword in terms of architectures. (Set Catchpoints) <catch exec, catch fork, catch vfork>: Don't mention supported systems. (Convenience Vars): Don't mention HP-UX. (Jumping): Remove mention of HP-UX in comment. (Files) <shared libraries>: Update supported shared library types list. Remove mention of HP-UX. (Native): Remove HP-UX subsection. (SVR4 Process Information): Remove mention of HP-UX.
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