I noticed a trailing "." in the @item for "show remotelogfile".
This removes it. Committing as obvious.
gdb/doc/ChangeLog
2019-02-21 Tom Tromey <tromey@adacore.com>
* gdb.texinfo (Remote Configuration): Remove trailing "." from
@item.
The GCC Guality testsuite within GCC compiles C/C++ files in GCC at
various optimization levels then debugs them in GDB, checking that
program values can be read. This is done within the dejagnu framework.
The new style options in GDB have broken many of the tests due to the
testsuite being unable to process the new control characters. The fix
in Guality is to either to improve the string matching or to disable
styling on the cli or init file (after checking gdb is recent enough
to support styling).
This fix will also need making an any other testsuites in the wild
that use GDB.
An alternative would be to automatically disable styling when using GDB
in batch mode. The reasoning here is that batch mode is only used when
automating GDB and any output will be processed later either with text
processing tools or viewed in text editors, many of these will not
correctly handle the control characters by default. This ensures GDB
continues to work as expected. Anyone who explicitly wants styling in
batch mode can enable it either in the init file or adding to the batch
file - but that would not be the standard use case.
Patch simply disables style after reading the batch command flag, before
reading in the init file or batch file.
gdb/ChangeLog:
* main.c (captured_main_1): Disable styling in batch mode.
The syntax we ended up with for -m32 -fPIC calls to __tls_get_addr is
rather weird.
bl __tls_get_addr+0x8000(gd0@tlsgd)@plt
This came about by accident, probably due to requiring the arg reloc
before the call reloc.
Of course the @plt really belongs with __tls_get_addr since it affects
the call rather than the call arg, and it isn't a great deal of
trouble to ensure the relocs are emitted in the correct order. This
patch supports a newer syntax, like so:
bl __tls_get_addr+0x8000@plt(gd0@tlsgd)
gas/
* config/tc-ppc.c (parse_tls_arg): New function, extracted..
(md_assembler): ..from here. Call it after parsing other
suffix modifiers too.
ld/
* testsuite/ld-powerpc/tls32.s: Test new @plt syntax.
symtab_symbol_info has a couple of messages that say "regulation
expression". I think "regular expression" was meant, so this patch
changes it.
gdb/ChangeLog
2019-02-20 Tom Tromey <tom@tromey.com>
* symtab.c (symtab_symbol_info): Fix typos.
gdb/testsuite/ChangeLog
2019-02-20 Tom Tromey <tom@tromey.com>
* gdb.base/info_qt.exp: Update.
PR 24244
* unwind-ia64.c (unw_decode_uleb128): Add end parameter, use it to
prevent walking off the end of the buffer.
(unw_decode_x1): Add end paramter, pass it to unw_decode_uleb128.
(unw_decode_x2): Likewise.
(unw_decode_x3): Likewise.
(unw_decode_x4): Likewise.
(unw_decode_r2): Pass the end parameter to unw_decode_uleb128.
(unw_decode_r3): Likewise.
(unw_decode_p7_p10): Likewise.
(unw_decode_b2): Likewise.
(unw_decode_b3_x4): Likewise.
While answering a user's question on irc, I realized that the
metasyntactic variables in "help find" are not in upper case. As you
know this is one of my pet quests, so here is a patch to fix this.
Tested on x86-64 Fedora 29.
gdb/ChangeLog
2019-02-20 Tom Tromey <tromey@adacore.com>
* findcmd.c (_initialize_mem_search): Use upper case for
metasyntactic variables.
AArch64 does not define any reggroups. This causes "maintenance print
reggroups" to dump the default set (which is ok).
However, if a new group is added via an xml file, then this now becomes
the only group.
Fixes gdb.xml/tdesc-regs.exp on AArch64.
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_add_reggroups): New function
(aarch64_gdbarch_init): Call aarch64_add_reggroups.
Big section alignment requirements between source and destination of a
long call can result in making call range bigger than what's reachable
by the call opcode. Add biggest section alignment of sections between
the call site and call destination to the call distance when making
long call relaxation decision.
2019-02-20 Eric Tsai <erictsai@cadence.com>
bfd/
* elf32-xtensa.c (is_resolvable_asm_expansion): Scan output
sections between the call site and call destination and adjust
call distance by the largest alignment.
ld/
* testsuite/ld-xtensa/call_overflow.d: New test definition.
* testsuite/ld-xtensa/call_overflow1.s: New test source.
* testsuite/ld-xtensa/call_overflow2.s: New test source.
* testsuite/ld-xtensa/call_overflow3.s: New test source.
* testsuite/ld-xtensa/xtensa.exp: Add call_overflow test.
Used for the AArch64 pointer authentication code mask registers in Arm v8.3-a.
NT_ARM_PAC_MASK matches the value in Linux include/uapi/linux/elf.h
include/ChangeLog:
* elf/common.h (NT_ARM_PAC_MASK): Add define.
bfd/ChangeLog:
* elf-bfd.h (elfcore_write_aarch_pauth): Add declaration.
* elf.c (elfcore_grok_aarch_pauth): New function.
(elfcore_grok_note): Check for NT_ARM_PAC_MASK.
(elfcore_write_aarch_pauth): New function.
(elfcore_write_register_note): Check for AArch64 pauth section.
git a31b8bd9a0 introduced a warning (depending on your system
headers).
PR 24225
* elf32-nios2.c (nios2_elf32_relocate_section): Check asprintf
return value.
PR 24132
PR 24138
* readelf.c (get_data): Avoid possibility of overflow when
checking for a read that may extend past end of file.
(process_program_headers): Likewise.
Errors that happen in nested sourced files (when a sourced file sources
another file) lead to a wrong error message, or use-after-free.
For example, if I put this in "a.gdb":
command_that_doesnt_exist
and this in "b.gdb":
source a.gdb
and try to "source b.gdb" in GDB, the result may look like this:
(gdb) source b.gdb
b.gdb:1: Error in sourced command file:
_that_doesnt_exist:1: Error in sourced command file:
Undefined command: "command_that_doesnt_exist". Try "help".
Notice the wrong file name where "a.gdb" should be. The exact result
may differ, depending on the feelings of the memory allocator.
What happens is:
- The "source a.gdb" command is saved by command_line_append_input_line
in command_line_input's static buffer.
- Since we are sourcing a file, the script_from_file function stores the
script name (a.gdb) in the source_file_name global. However, it doesn't
do a copy, it just saves a pointer to command_line_input's static buffer.
- The "command_that_doesnt_exist" command is saved by
command_line_append_input_line in command_line_input's static buffer.
Depending on what xrealloc does, source_file_name may now point to
freed memory, or at the minimum the data it was pointing to was
overwritten.
- When the error is handled in script_from_file, we dererence
source_file_name to print the name of the file in which the error
occured.
To fix it, I made source_file_name an std::string, so that keeps a copy of
the file name instead of pointing to a buffer with a too small
lifetime.
With this patch, the expected filename is printed, and no use-after-free
occurs:
(gdb) source b.gdb
b.gdb:1: Error in sourced command file:
a.gdb:1: Error in sourced command file:
Undefined command: "command_that_doesnt_exist". Try "help".
I passed explicit template parameters to make_scoped_restore
(<std::string, const std::string &>), so that the second parameter is
passed by reference and avoid a copy.
It was not as obvious as I first thought to change gdb.base/source.exp
to test this, because source commands inside sourced files are
interpreted relative to GDB's current working directory, not the
directory of the currently sourced file. As a workaround, I moved the
snippet that tests errors after the snippet that adds the source
directory to the search path. This way, the "source source-error-1.gdb"
line in source-error.exp manages to find the file.
For reference, here is what ASAN reports when use-after-free occurs:
(gdb) source b.gdb
=================================================================
==18498==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c000019847 at pc 0x7f1d3645de8e bp 0x7ffdcb892e50 sp 0x7ffdcb8925c8
READ of size 6 at 0x60c000019847 thread T0
#0 0x7f1d3645de8d in printf_common /build/gcc/src/gcc/libsanitizer/sanitizer_common/sanitizer_common_interceptors_format.inc:546
#1 0x7f1d36477175 in __interceptor_vasprintf /build/gcc/src/gcc/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:1525
#2 0x5632eaffa277 in xstrvprintf(char const*, __va_list_tag*) /home/simark/src/binutils-gdb/gdb/common/common-utils.c:122
#3 0x5632eaff96d1 in throw_it /home/simark/src/binutils-gdb/gdb/common/common-exceptions.c:351
#4 0x5632eaff98df in throw_verror(errors, char const*, __va_list_tag*) /home/simark/src/binutils-gdb/gdb/common/common-exceptions.c:379
#5 0x5632eaff9a2a in throw_error(errors, char const*, ...) /home/simark/src/binutils-gdb/gdb/common/common-exceptions.c:394
#6 0x5632eafca21a in script_from_file(_IO_FILE*, char const*) /home/simark/src/binutils-gdb/gdb/cli/cli-script.c:1553
#7 0x5632eaf8a500 in source_script_from_stream /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:569
#8 0x5632eaf8a735 in source_script_with_search /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:605
#9 0x5632eaf8ab20 in source_command /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:664
#10 0x5632eafa8b4a in do_const_cfunc /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:106
#11 0x5632eafb0687 in cmd_func(cmd_list_element*, char const*, int) /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:1892
#12 0x5632ebf3dd87 in execute_command(char const*, int) /home/simark/src/binutils-gdb/gdb/top.c:630
#13 0x5632eb3b25d3 in command_handler(char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:583
#14 0x5632ebf3cf09 in read_command_file(_IO_FILE*) /home/simark/src/binutils-gdb/gdb/top.c:425
#15 0x5632eafca054 in script_from_file(_IO_FILE*, char const*) /home/simark/src/binutils-gdb/gdb/cli/cli-script.c:1547
#16 0x5632eaf8a500 in source_script_from_stream /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:569
#17 0x5632eaf8a735 in source_script_with_search /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:605
#18 0x5632eaf8ab20 in source_command /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:664
#19 0x5632eafa8b4a in do_const_cfunc /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:106
#20 0x5632eafb0687 in cmd_func(cmd_list_element*, char const*, int) /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:1892
#21 0x5632ebf3dd87 in execute_command(char const*, int) /home/simark/src/binutils-gdb/gdb/top.c:630
#22 0x5632eb3b25d3 in command_handler(char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:583
#23 0x5632eb3b2f87 in command_line_handler(std::unique_ptr<char, gdb::xfree_deleter<char> >&&) /home/simark/src/binutils-gdb/gdb/event-top.c:770
#24 0x5632eb3b0fe1 in gdb_rl_callback_handler /home/simark/src/binutils-gdb/gdb/event-top.c:213
#25 0x5632ec1c8729 in rl_callback_read_char /home/simark/src/binutils-gdb/readline/callback.c:220
#26 0x5632eb3b0b8f in gdb_rl_callback_read_char_wrapper_noexcept /home/simark/src/binutils-gdb/gdb/event-top.c:175
#27 0x5632eb3b0da1 in gdb_rl_callback_read_char_wrapper /home/simark/src/binutils-gdb/gdb/event-top.c:192
#28 0x5632eb3b2186 in stdin_event_handler(int, void*) /home/simark/src/binutils-gdb/gdb/event-top.c:511
#29 0x5632eb3aa6a9 in handle_file_event /home/simark/src/binutils-gdb/gdb/event-loop.c:733
#30 0x5632eb3aaf41 in gdb_wait_for_event /home/simark/src/binutils-gdb/gdb/event-loop.c:859
#31 0x5632eb3a88ea in gdb_do_one_event() /home/simark/src/binutils-gdb/gdb/event-loop.c:347
#32 0x5632eb3a89bf in start_event_loop() /home/simark/src/binutils-gdb/gdb/event-loop.c:371
#33 0x5632eb76fbfc in captured_command_loop /home/simark/src/binutils-gdb/gdb/main.c:330
#34 0x5632eb772ea8 in captured_main /home/simark/src/binutils-gdb/gdb/main.c:1176
#35 0x5632eb773071 in gdb_main(captured_main_args*) /home/simark/src/binutils-gdb/gdb/main.c:1192
#36 0x5632eabfe7f9 in main /home/simark/src/binutils-gdb/gdb/gdb.c:32
#37 0x7f1d3554f222 in __libc_start_main (/usr/lib/libc.so.6+0x24222)
#38 0x5632eabfe5dd in _start (/home/simark/build/binutils-gdb/gdb/gdb+0x195d5dd)
0x60c000019847 is located 7 bytes inside of 128-byte region [0x60c000019840,0x60c0000198c0)
freed by thread T0 here:
#0 0x7f1d36502491 in __interceptor_realloc /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cc:105
#1 0x5632eaff9f47 in xrealloc /home/simark/src/binutils-gdb/gdb/common/common-utils.c:62
#2 0x5632eaff6b44 in buffer_grow(buffer*, char const*, unsigned long) /home/simark/src/binutils-gdb/gdb/common/buffer.c:40
#3 0x5632eb3b271d in command_line_append_input_line /home/simark/src/binutils-gdb/gdb/event-top.c:614
#4 0x5632eb3b28c6 in handle_line_of_input(buffer*, char const*, int, char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:654
#5 0x5632ebf402a6 in command_line_input(char const*, char const*) /home/simark/src/binutils-gdb/gdb/top.c:1252
#6 0x5632ebf3cee9 in read_command_file(_IO_FILE*) /home/simark/src/binutils-gdb/gdb/top.c:422
#7 0x5632eafca054 in script_from_file(_IO_FILE*, char const*) /home/simark/src/binutils-gdb/gdb/cli/cli-script.c:1547
#8 0x5632eaf8a500 in source_script_from_stream /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:569
#9 0x5632eaf8a735 in source_script_with_search /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:605
#10 0x5632eaf8ab20 in source_command /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:664
#11 0x5632eafa8b4a in do_const_cfunc /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:106
#12 0x5632eafb0687 in cmd_func(cmd_list_element*, char const*, int) /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:1892
#13 0x5632ebf3dd87 in execute_command(char const*, int) /home/simark/src/binutils-gdb/gdb/top.c:630
#14 0x5632eb3b25d3 in command_handler(char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:583
#15 0x5632ebf3cf09 in read_command_file(_IO_FILE*) /home/simark/src/binutils-gdb/gdb/top.c:425
#16 0x5632eafca054 in script_from_file(_IO_FILE*, char const*) /home/simark/src/binutils-gdb/gdb/cli/cli-script.c:1547
#17 0x5632eaf8a500 in source_script_from_stream /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:569
#18 0x5632eaf8a735 in source_script_with_search /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:605
#19 0x5632eaf8ab20 in source_command /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:664
#20 0x5632eafa8b4a in do_const_cfunc /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:106
#21 0x5632eafb0687 in cmd_func(cmd_list_element*, char const*, int) /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:1892
#22 0x5632ebf3dd87 in execute_command(char const*, int) /home/simark/src/binutils-gdb/gdb/top.c:630
#23 0x5632eb3b25d3 in command_handler(char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:583
#24 0x5632eb3b2f87 in command_line_handler(std::unique_ptr<char, gdb::xfree_deleter<char> >&&) /home/simark/src/binutils-gdb/gdb/event-top.c:770
#25 0x5632eb3b0fe1 in gdb_rl_callback_handler /home/simark/src/binutils-gdb/gdb/event-top.c:213
#26 0x5632ec1c8729 in rl_callback_read_char /home/simark/src/binutils-gdb/readline/callback.c:220
#27 0x5632eb3b0b8f in gdb_rl_callback_read_char_wrapper_noexcept /home/simark/src/binutils-gdb/gdb/event-top.c:175
#28 0x5632eb3b0da1 in gdb_rl_callback_read_char_wrapper /home/simark/src/binutils-gdb/gdb/event-top.c:192
#29 0x5632eb3b2186 in stdin_event_handler(int, void*) /home/simark/src/binutils-gdb/gdb/event-top.c:511
previously allocated by thread T0 here:
#0 0x7f1d36502491 in __interceptor_realloc /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cc:105
#1 0x5632eaff9f47 in xrealloc /home/simark/src/binutils-gdb/gdb/common/common-utils.c:62
#2 0x5632eaff6b44 in buffer_grow(buffer*, char const*, unsigned long) /home/simark/src/binutils-gdb/gdb/common/buffer.c:40
#3 0x5632eb3b271d in command_line_append_input_line /home/simark/src/binutils-gdb/gdb/event-top.c:614
#4 0x5632eb3b28c6 in handle_line_of_input(buffer*, char const*, int, char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:654
#5 0x5632ebf402a6 in command_line_input(char const*, char const*) /home/simark/src/binutils-gdb/gdb/top.c:1252
#6 0x5632ebf3cee9 in read_command_file(_IO_FILE*) /home/simark/src/binutils-gdb/gdb/top.c:422
#7 0x5632eafca054 in script_from_file(_IO_FILE*, char const*) /home/simark/src/binutils-gdb/gdb/cli/cli-script.c:1547
#8 0x5632eaf8a500 in source_script_from_stream /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:569
#9 0x5632eaf8a735 in source_script_with_search /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:605
#10 0x5632eaf8ab20 in source_command /home/simark/src/binutils-gdb/gdb/cli/cli-cmds.c:664
#11 0x5632eafa8b4a in do_const_cfunc /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:106
#12 0x5632eafb0687 in cmd_func(cmd_list_element*, char const*, int) /home/simark/src/binutils-gdb/gdb/cli/cli-decode.c:1892
#13 0x5632ebf3dd87 in execute_command(char const*, int) /home/simark/src/binutils-gdb/gdb/top.c:630
#14 0x5632eb3b25d3 in command_handler(char const*) /home/simark/src/binutils-gdb/gdb/event-top.c:583
#15 0x5632eb3b2f87 in command_line_handler(std::unique_ptr<char, gdb::xfree_deleter<char> >&&) /home/simark/src/binutils-gdb/gdb/event-top.c:770
#16 0x5632eb3b0fe1 in gdb_rl_callback_handler /home/simark/src/binutils-gdb/gdb/event-top.c:213
#17 0x5632ec1c8729 in rl_callback_read_char /home/simark/src/binutils-gdb/readline/callback.c:220
#18 0x5632eb3b0b8f in gdb_rl_callback_read_char_wrapper_noexcept /home/simark/src/binutils-gdb/gdb/event-top.c:175
#19 0x5632eb3b0da1 in gdb_rl_callback_read_char_wrapper /home/simark/src/binutils-gdb/gdb/event-top.c:192
#20 0x5632eb3b2186 in stdin_event_handler(int, void*) /home/simark/src/binutils-gdb/gdb/event-top.c:511
#21 0x5632eb3aa6a9 in handle_file_event /home/simark/src/binutils-gdb/gdb/event-loop.c:733
#22 0x5632eb3aaf41 in gdb_wait_for_event /home/simark/src/binutils-gdb/gdb/event-loop.c:859
#23 0x5632eb3a88ea in gdb_do_one_event() /home/simark/src/binutils-gdb/gdb/event-loop.c:347
#24 0x5632eb3a89bf in start_event_loop() /home/simark/src/binutils-gdb/gdb/event-loop.c:371
#25 0x5632eb76fbfc in captured_command_loop /home/simark/src/binutils-gdb/gdb/main.c:330
#26 0x5632eb772ea8 in captured_main /home/simark/src/binutils-gdb/gdb/main.c:1176
#27 0x5632eb773071 in gdb_main(captured_main_args*) /home/simark/src/binutils-gdb/gdb/main.c:1192
#28 0x5632eabfe7f9 in main /home/simark/src/binutils-gdb/gdb/gdb.c:32
#29 0x7f1d3554f222 in __libc_start_main (/usr/lib/libc.so.6+0x24222)
SUMMARY: AddressSanitizer: heap-use-after-free /build/gcc/src/gcc/libsanitizer/sanitizer_common/sanitizer_common_interceptors_format.inc:546 in printf_common
gdb/ChangeLog:
* top.h (source_file_name): Change to std::string.
* top.c (source_file_name): Likewise.
(command_line_input): Adjust.
* cli/cli-script.c (script_from_file): Adjust.
gdb/testsuite/ChangeLog:
* gdb.base/source.exp: Move "error in sourced script" code to
the end.
* gdb.base/source-error.gdb: Move contents to
source-error-1.gdb. Add new code to source source-error-1.gdb.
* gdb.base/source-error-1.gdb: New file, from previous
source-error.gdb.
PR 24236
* archive64.c (_bfd_archive_64_bit_slurp_armap): Move code adding
sentinel NUL to string buffer nearer to loop where it is used.
Don't go past sentinel when scanning strings, and don't write
NUL again.
* archive.c (do_slurp_coff_armap): Simplify string handling to
archive64.c style.
2019-02-19 Egeyar Bagcioglu <egeyar.bagcioglu@oracle.com>
gold/
PR gold/23870
* aarch64.cc (Target_aarch64::Scan::global): Check if a symbol with
R_AARCH64_MOVW_.ABS_* relocations requires a PLT entry.
* testsuite/Makefile.am: Add aarch64_pr23870 test case.
* testsuite/Makefile.in: Regenerate.
* testsuite/aarch64_pr23870_bar.c: New file.
* testsuite/aarch64_pr23870_foo.c: New file.
* testsuite/aarch64_pr23870_main.S: New file.
While working on the Ada task code, I noticed a few things that could
be cleaned up:
* task_list_valid_p was not set in all cases in ada_build_task_list.
This causes many needless re-fetches of the task list.
* task_list_valid_p can be bool, and various functions can also return
bool.
* Nothing checks the return value of read_known_tasks, so it can be
changed to return void.
* The call to ada_build_task_list in
ravenscar_thread_target::update_thread_list is redundant, because
this is the first thing done by iterate_over_live_ada_tasks.
Tested using the internal AdaCore test suite against a ravenscar
target.
gdb/ChangeLog
2019-02-19 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c
(ravenscar_thread_target::update_thread_list): Don't call
ada_build_task_list.
* ada-lang.h (ada_build_task_list): Don't declare.
* ada-tasks.c (struct ada_tasks_inferior_data)
<task_list_valid_p>: Now bool.
(read_known_tasks, ada_task_list_changed)
(ada_tasks_invalidate_inferior_data): Update.
(read_known_tasks_array): Return bool.
(read_known_tasks_list): Likewise.
(read_known_tasks): Return void.
(ada_build_task_list): Now static.
The code in type_align (gdbtypes.c) currently hard-codes the rules for
aligning method and member pointers. It would seem better to forward
these types through the gdbarch hook, so that an architecture could
override the alignment of these types if needed.
Only 3 architectures currently override the gdbarch alignment hook,
these are arc, i386, and nio2.
For arc and nios the alignment rules are that alignment is the minimum
of 4-bytes and the type length. As pointers are 4-bytes on these
targets, then (assuming method and members pointers are also 4-bytes)
there should be no change to the alignment after this patch.
For i386 the gdbarch alignment hook overrides for some INT and FLOAT
types only. For method and member pointers we align on the type size
still, so there should be no change to the alignment after this patch.
I tested this on x86-64 GNU Linux with no regressions.
gdb/ChangeLog:
* gdbtypes.c (type_align): Allow alignment of TYPE_CODE_METHODPTR
and TYPE_CODE_MEMBERPTR to be overridden by the gdbarch.
Valgrind reports leaks such as the below.
Fix these leaks by changing ada_tasks_pspace_data_handle
and ada_tasks_inferior_data_handle to use the 'with_cleanup' register variant.
Tested on debian/amd64 natively and under Valgrind.
==26346== 56 bytes in 1 blocks are definitely lost in loss record 631 of 3,249
==26346== at 0x4C2C4CC: operator new(unsigned long) (vg_replace_malloc.c:344)
==26346== by 0x38F911: get_ada_tasks_inferior_data(inferior*) (ada-tasks.c:281)
==26346== by 0x38FA3F: ada_tasks_invalidate_inferior_data (ada-tasks.c:1362)
==26346== by 0x38FA3F: ada_tasks_new_objfile_observer(objfile*) (ada-tasks.c:1411)
==26346== by 0x60CBC5: operator() (functional:2127)
==26346== by 0x60CBC5: notify (observable.h:106)
==26346== by 0x60CBC5: clear_symtab_users(enum_flags<symfile_add_flag>) (symfile.c:2903)
...
==26346== 104 bytes in 1 blocks are definitely lost in loss record 984 of 3,249
==26346== at 0x4C2E0BC: calloc (vg_replace_malloc.c:762)
==26346== by 0x4056F0: xcalloc (common-utils.c:84)
==26346== by 0x38F8AE: xcnew<ada_tasks_pspace_data> (poison.h:122)
==26346== by 0x38F8AE: get_ada_tasks_pspace_data(program_space*) (ada-tasks.c:253)
==26346== by 0x38FA77: ada_tasks_invalidate_pspace_data (ada-tasks.c:1354)
==26346== by 0x38FA77: ada_tasks_new_objfile_observer(objfile*) (ada-tasks.c:1394)
==26346== by 0x60CBC5: operator() (functional:2127)
==26346== by 0x60CBC5: notify (observable.h:106)
...
gdb/ChangeLog
2019-02-18 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* ada-task.c (_initialize_tasks): Use 'with_cleanup' register
variant for ada_tasks_pspace_data_handle and
ada_tasks_inferior_data_handle.
(ada_tasks_pspace_data_cleanup): New function.
(ada_tasks_inferior_data_cleanup): New function.
While working on the previous patch, I noticed that if
macro_source_fullname returned a std::string, then the callers would
be simplified. This patch implements this idea.
gdb/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
* macrotab.h (macro_source_fullname): Return a std::string.
* macrotab.c (macro_include, check_for_redefinition)
(macro_undef, macro_lookup_definition, foreach_macro)
(foreach_macro_in_scope): Update.
(macro_source_fullname): Return a std::string.
* macrocmd.c (show_pp_source_pos): Update.
This adds filename styling to "info macro".
gdb/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
* macrocmd.c (show_pp_source_pos): Style the file names.
gdb/testsuite/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
* gdb.base/style.exp: Use -g3 to compile when possible. Add test
for macro styling.
* gdb.base/style.c (SOME_MACRO): New macro.
The styling series introduced some new errors in the TUI -- the series
changed how source lines are allocated, without updating
tui_set_source_content_nil.
There are several failures but a typical one looks like:
==6274== Use of uninitialised value of size 8
==6274== at 0x4E4A095: wclrtoeol (in /usr/lib64/libncursesw.so.6.1)
==6274== by 0x4E47617: waddch (in /usr/lib64/libncursesw.so.6.1)
==6274== by 0x8325CB: tui_puts_internal(_win_st*, char const*, int*) (tui-io.c:393)
==6274== by 0x82E89D: tui_file::puts(char const*) (tui-file.c:39)
==6274== by 0x84BF5F: vfprintf_unfiltered(ui_file*, char const*, __va_list_tag*) (utils.c:2026)
This patch rewrites tui_set_source_content_nil, fixing the bug.
This was also reported as PR tui/24197.
Verified by running valgrind before and after on x86-64 Fedora 29.
gdb/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
PR tui/24197:
* tui/tui-source.c (tui_set_source_content_nil): Rewrite.
I believe this fixes all the pager output problems with styling that
Philippe pointed out, plus at least one more. The patch is somewhat
hard to reason about, so you may wish to give it a try. Even writing
the tests was hard.
This removes the style caching, because it was difficult to keep the
style cache correct in all cases. Since this would cause more style
escapes to be emitted, instead it changes fputs_styled to try to avoid
unnecessary changes.
Another bug was that the wrap buffer was not flushed in the case where
wrap_column==0. In the old (pre-patch series) code, characters were
directly emitted in this case; so flushing the wrap buffer here
restores this behavior.
On error the wrap buffer must be emptied. Otherwise, interrupting
output can leave characters in the buffer that will be emitted later.
As discussed on gdb-patches, this fixes the ada-lang.c problem where
filtered and unfiltered printing were mixed. Now user_select_syms
uses filtered printing, which is what its callees were already doing.
Finally, it was possible for source line highlighting to be garbled
(and invalid escape sequences emitted) if the pager was invoked at the
wrong spot. To fix this, the patch arranges for source line escapes
to always be emitted as a unit.
gdb/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
* ada-lang.c (user_select_syms): Use filtered printing.
* utils.c (wrap_style): New global.
(desired_style): Remove.
(emit_style_escape): Add stream parameter.
(set_output_style, reset_terminal_style, prompt_for_continue):
Update.
(flush_wrap_buffer): Only flush gdb_stdout.
(wrap_here): Set wrap_style.
(fputs_maybe_filtered): Clear the wrap buffer on exception. Don't
treat escape sequences as a character. Change when wrap buffer is
flushed.
(fputs_styled): Do not set the output style when the default is
requested.
* ui-style.h (struct ui_file_style) <is_default>: New method.
* source.c (print_source_lines_base): Emit escape sequences in one
piece.
gdb/testsuite/ChangeLog
2019-02-17 Tom Tromey <tom@tromey.com>
* gdb.base/style.exp: Add line-wrapping tests.
* gdb.base/page.exp: Add test for quitting during pagination.
This commit enhances type_align to handle TYPE_CODE_RANGE types
the same as integers and enums, rather than returning zero,
which means for this function that it could not determine its
alignment.
gdb/ChangeLog:
* gdbtypes.c (type_align): Handle TYPE_CODE_RANGE the same as
integers and enumeration types.
Tested on x86_64-linux. Also tested on a variety of platforms
(with CPUs being ARM, AArch64, Leon3 (SPARC-like), PowerPC,
PowerPC64, RV64, Visium, x86, x86_64).
Trying to print a packed array sometimes leads to a crash (see
attached testcase for an example of when this happens):
| (gdb) p bad
| [1] 65571 segmentation fault gdb -q foo
Variable "bad" is declared in the debug information as an array where
the array's type name has an XPnnn suffix:
| .uleb128 0xc # (DIE (0x566) DW_TAG_typedef)
| .long .LASF200 # DW_AT_name: "pck__t___XP1"
| [loc info attributes snipped]
| .long 0x550 # DW_AT_type
| .byte 0x1 # DW_AT_alignment
The signals to GDB that the debugging information follows a GNAT encoding
used for packed arrays, and an in order to decode it, we need to find
the type whose name is the same minus the "___XPnnn" suffix: "pck__t".
For that, we make a call to ada-lang.c::standard_lookup, which is
a simple function which essentially does:
| /* Return the result of a standard (literal, C-like) lookup of NAME in
| given DOMAIN, visible from lexical block BLOCK. */
|
| [...]
| sym = lookup_symbol_in_language (name, block, domain, language_c, 0);
Unfortunately for us, while the intent of this call was to perform
an exact-match lookup, in our case, it returns ... type pck__t___XP1
instead! In other words, it finds itself back. The reason why it finds
this type is a confluence of two factors:
(1) Forcing the lookup into language_c currently does not affect
how symbol matching is done anymore, because we look at the symbol's
language to determine which kind of matching should be done;
(2) The lookup searches the local context (via block) first, beforei
doing a more general lookup. And looking at the debug info for
the main subprogram, we see that type "pck__t" is not declared
there, only in the debug info for pck.ads. In other words,
there is no way that we accidently find "pck__t" by random chance.
I believe Pedro added a new function called ada_lookup_encoded_symbol
for that specific purpose, so I started by replacing the lookup
by language above by this. Unfortunately, still no joy.
This was because, even though ada_lookup_encoded_symbol puts angle-
brackets around the search name to signal that we want a verbatim
search, we end up losing that information in the function called
to compare a symbol with the search name:
| static bool
| do_full_match (const char *symbol_search_name,
| const lookup_name_info &lookup_name,
| completion_match_result *comp_match_res)
| {
| return full_match (symbol_search_name, ada_lookup_name (lookup_name));
^^^^^^^^^^^^^^^
|
<=> lookup_name.m_ada.m_encoded_name
(no angle brackets)
The way I fixed this was by introducing a new function called
do_exact_match, and then adjust ada_get_symbol_name_matcher to
return that function when seeing that we have a verbatim non-wild-match
search.
As it happens, this fixes an incorrect test in gdb.ada/homony.exp,
where we were inserting a breakpoint on a symbol using the angle-brackets
notation, and got 2 locations for that breakpoint...
(gdb) b <homonym__get_value>
Breakpoint 1 at 0x4029fc: <homonym__get_value>. (2 locations)
... each location being in a different function:
(gdb) info break
Num Type Disp Enb Address What
1 breakpoint keep y <MULTIPLE>
1.1 y 0x00000000004029fc in homonym.get_value
at /[...]/homonym.adb:32
1.2 y 0x0000000000402a3a in homonym.get_value
at /[...]/homonym.adb:50
(gdb) x /i 0x00000000004029fc
0x4029fc <homonym__get_value+8>: movl $0x1d,-0x4(%rbp)
(gdb) x /i 0x0000000000402a3a
0x402a3a <homonym__get_value__2+8>: movl $0x11,-0x4(%rbp)
Since we used angle-brackets, we shouldn't be matching the second one,
something this patch fixes.
gdb/ChangeLog:
* ada-lang.c (standard_lookup): Use ada_lookup_encoded_symbol
instead of lookup_symbol_in_language
(do_exact_match): New function.
(ada_get_symbol_name_matcher): Return do_exact_match when
doing a verbatim match.
gdb/testsuite/ChangeLog:
* gdb.ada/big_packed_array: New testcase.
* gdb.ada/homonym.exp: Fix incorrect expected output for
"break <homonym__get_value>" test.
Tested on x86_64-linux.
ravenscar-thread.c intercepts resume and wait target requests and
replaces the requested ptid with the ptid of the underlying CPU.
However, this is incorrect when a request is made with a wildcard
ptid.
This patch adds a special case to ravenscar-thread.c for
minus_one_ptid. I don't believe a special case for process wildcards
is necessary, so I have not added that.
Joel's description explains the bug well:
At the user level, we noticed the issue because we had a test were
we insert a breakpoint one some code which is only run from, say,
CPU #2, whereas we unfortunately resumed the execution after having
stopped somewhere in CPU #1. As a result, we sent an order to resume
CPU #1, which starves CPU #2 forever, because the code in CPU #1
waits for some of the Ada tasks allocated to CPU #2 (and we never
reach our breakpoint either).
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c (ravenscar_thread_target::resume)
(ravenscar_thread_target::wait): Special case wildcard requests.
This changes ravenscar-thread.c to make it ready for multi-target.
This is done by moving globals into the target, and then arranging to
allocate the target with "new" and delete the target in its "close"
method.
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c (base_ptid): Remove.
(struct ravenscar_thread_target) <close>: New method.
<m_base_ptid>: New member.
<update_inferior_ptid, active_task, task_is_currently_active,
runtime_initialized>: Declare methods.
<ravenscar_thread_target>: Add constructor.
(ravenscar_thread_target::task_is_currently_active)
(ravenscar_thread_target::update_inferior_ptid)
(ravenscar_runtime_initialized): Rename. Now methods.
(ravenscar_thread_target::resume, ravenscar_thread_target::wait)
(ravenscar_thread_target::update_thread_list): Update.
(ravenscar_thread_target::active_task): Now method.
(ravenscar_thread_target::store_registers)
(ravenscar_thread_target::prepare_to_store)
(ravenscar_thread_target::prepare_to_store)
(ravenscar_thread_target::mourn_inferior): Update.
(ravenscar_inferior_created): Use "new" to create target.
(ravenscar_thread_target::get_ada_task_ptid): Update.
(_initialize_ravenscar): Don't initialize base_ptid.
(ravenscar_ops): Remove global.
This adds a push_target overload that takes a "target_ops_up &&".
This removes some calls to release a target_ops_up, and makes the
intent here clearer.
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* target.h (push_target): Declare new overload.
* target.c (push_target): New overload, taking an rvalue reference.
* remote.c (remote_target::open_1): Use push_target overload.
* corelow.c (core_target_open): Use push_target overload.
This changes some functions in ravenscar-thread.c to return "bool"
rather than int, where appropriate, and also changes "(void)" to "()".
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c (is_ravenscar_task)
(ravenscar_task_is_currently_active): Return bool.
(ravenscar_update_inferior_ptid, get_running_thread_msymbol)
(_initialize_ravenscar): Remove "(void)".
(has_ravenscar_runtime, ravenscar_runtime_initialized): Likewise.
Return bool.
This fixes some incorrect formatting in ravenscar-thread.c.
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c (ravenscar_runtime_initializer)
(has_ravenscar_runtime, get_running_thread_id)
(ravenscar_thread_target::resume): Fix indentation.
This turns ravenscar_arch_ops into an abstract base class and updates
all the places where it is used. This is an improvement because it
avoids any possibility of forgetting to set one of the function
pointers. It also makes clear that these functions aren't intended to
be changed dynamically.
This version of the patch removes the prepare_to_store method, as it
is unused, and it is easy enough to add if it is ever needed.
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* sparc-ravenscar-thread.c (struct sparc_ravenscar_ops): Derive
from ravenscar_arch_ops.
(sparc_ravenscar_ops::fetch_registers)
(sparc_ravenscar_ops::store_registers): Now methods.
(sparc_ravenscar_prepare_to_store): Remove.
(sparc_ravenscar_ops): Redefine.
* ravenscar-thread.h (struct ravenscar_arch_ops): Add virtual
methods and destructor. Remove members.
* ravenscar-thread.c (ravenscar_thread_target::fetch_registers)
(ravenscar_thread_target::store_registers)
(ravenscar_thread_target::prepare_to_store): Update.
* ppc-ravenscar-thread.c (ppc_ravenscar_generic_prepare_to_store):
Remove.
(struct ppc_ravenscar_powerpc_ops): Derive from
ravenscar_arch_ops.
(ppc_ravenscar_powerpc_ops::fetch_registers)
(ppc_ravenscar_powerpc_ops::store_registers): Now methods.
(ppc_ravenscar_powerpc_ops): Redefine.
(struct ppc_ravenscar_e500_ops): Derive from ravenscar_arch_ops.
(ppc_ravenscar_e500_ops::fetch_registers)
(ppc_ravenscar_e500_ops::store_registers): Now methods.
(ppc_ravenscar_e500_ops): Redefine.
* aarch64-ravenscar-thread.c
(aarch64_ravenscar_generic_prepare_to_store): Remove.
(struct aarch64_ravenscar_ops): Derive from ravenscar_arch_ops.
(aarch64_ravenscar_fetch_registers)
(aarch64_ravenscar_store_registers): Now methods.
(aarch64_ravenscar_ops): Redefine.
This changes some code in ravenscar-thread.c to use scoped_restore. I
am not sure if it matters in practice, but this makes these methods
exception-safe in case the methods lower in the target stack can
throw.
gdb/ChangeLog
2019-02-15 Tom Tromey <tromey@adacore.com>
* ravenscar-thread.c (ravenscar_thread_target::stopped_by_sw_breakpoint)
(ravenscar_thread_target::stopped_by_hw_breakpoint)
(ravenscar_thread_target::stopped_by_watchpoint)
(ravenscar_thread_target::stopped_data_address)
(ravenscar_thread_target::core_of_thread): Use scoped_restore.
Phillipe noticed that create_ada_exception_catchpoint was not freeing
the "addr_string" memory:
==14141== 114 bytes in 4 blocks are definitely lost in loss record 1,054 of 3,424
==14141== at 0x4C2BE6D: malloc (vg_replace_malloc.c:309)
==14141== by 0x405107: xmalloc (common-utils.c:44)
==14141== by 0x7563F9: xstrdup (xstrdup.c:34)
==14141== by 0x381B21: ada_exception_sal (ada-lang.c:13217)
==14141== by 0x381B21: create_ada_exception_catchpoint(gdbarch*, ada_exception_catchpoint_kind, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, int, int) (ada-lang.c:13251)
==14141== by 0x3820A8: catch_ada_exception_command(char const*, int, cmd_list_element*) (ada-lang.c:13285)
==14141== by 0x3F4828: cmd_func(cmd_list_element*, char const*, int) (cli-decode.c:1892)
This patch fixes the problem by changing ada_exception_sal to return a
std::string via its out parameter.
gdb/ChangeLog
2019-02-15 Philippe Waroquiers <philippe.waroquiers@skynet.be>
Tom Tromey <tromey@adacore.com>
* ada-lang.c (ada_exception_sal): Change addr_string to a
std::string.
(create_ada_exception_catchpoint): Update.
