While running bare-metal tests with GDB i noticed some failures in
gdb.base/break.exp, related to the use of the catch commands.
It turns out GDB tries to access memory address 0x0 whenever one tries
to insert a catchpoint, which should obviously not happen.
This was introduced with the changes for permanent breakpoints. In special,
bp_loc_is_permanent tries to check if there is a breakpoint inserted at
the same address as the current breakpoint's location's address. In the
case of catchpoints, this is 0x0.
(top-gdb) catch fork
Sending packet: $m0,1#fa...Packet received: E01
Catchpoint 4 (fork)
(top-gdb) catch vfork
Sending packet: $m0,1#fa...Packet received: E01
Catchpoint 5 (vfork)
It is not obvious to detect because this fails silently for Linux. For our
bare-metal testing, though, this fails with a clear error message from the
target about not being able to read such address.
The attached patch addresses this by bailing out of bp_loc_is_permanent (...)
if the location address is not meaningful. I also took the opportunity to
update the comment for breakpoint_address_is_meaningful, which mentioned
breakpoint addresses as opposed to their locations' addresses.
gdb/ChangeLog:
2015-08-11 Luis Machado <lgustavo@codesourcery.com>
* breakpoint.c (bp_loc_is_permanent): Return 0 when breakpoint
location address is not meaningful.
(breakpoint_address_is_meaningful): Update comment.
This patch adds documentation for explicit locations to both the
User Manual and gdb's online help system.
gdb/ChangeLog:
* NEWS: Mention explicit locations.
* breakpoint.c [LOCATION_HELP_STRING]: New macro.
[BREAK_ARGS_HELP]: Use LOCATION_HELP_STRING.
(_initialize_breakpoint): Update documentation for
"clear", "break", "trace", "strace", "ftrace", and "dprintf".
gdb/doc/ChangeLog:
* gdb.texinfo (Thread-Specific Breakpoints, Printing Source Lines):
Use "location(s)"instead of "linespec(s)".
(Specifying a Location): Rewrite.
Add subsections describing linespec, address, and explicit locations.
Add node/menu for each subsection.
(Source and Machine Code, C Preprocessor Macros)
(Create and Delete Trace points)
(Extensions for Ada Tasks): Use "location(s)" instead of "linespec(s)".
(Continuing at a Different Address): Remove "linespec" examples.
Add reference to "Specify a Location"
(The -break-insert Command): Rewrite. Add anchor.
Add reference to appropriate manual section discussing locations.
(The -dprintf-insert Command): Refer to -break-insert for
specification of 'location'.
gdb/testsuite/ChangeLog:
* gdb.base/help.exp: Update help_breakpoint_text.
This patch adds support for explicit locations to MI's -break-insert
command. The new options, documented in the User Manual, are
--source, --line, --function, and --label.
gdb/ChangeLog:
* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Add support for
explicit locations, options "--source", "--function",
"--label", and "--line".
gdb/testsuite/ChangeLog:
* gdb.mi/mi-break.exp (test_explicit_breakpoints): New proc.
(at toplevel): Call test_explicit_breakpoints.
* gdb.mi/mi-dprintf.exp: Add tests for explicit dprintf
breakpoints.
* lib/mi-support.exp (mi_make_breakpoint): Add support for
breakpoint conditions, "-cond".
This patch exposes explicit locations to the CLI user. This enables
users to "explicitly" specify attributes of the breakpoint location
to avoid any ambiguity that might otherwise exist with linespecs.
The general syntax of explicit locations is:
-source SOURCE_FILENAME -line {+-}LINE -function FUNCTION_NAME
-label LABEL_NAME
Option names may be abbreviated, e.g., "-s SOURCE_FILENAME -li 3" and users
may use the completer with either options or values.
gdb/ChangeLog:
* completer.c: Include location.h.
(enum match_type): New enum.
(location_completer): Rename to ...
(linespec_completer): ... this.
(collect_explicit_location_matches, backup_text_ptr)
(explicit_location_completer): New functions.
(location_completer): "New" function; handle linespec
and explicit location completions.
(complete_line_internal): Remove all location completer-specific
handling.
* linespec.c (linespec_lexer_lex_keyword, is_ada_operator)
(find_toplevel_char): Export.
(linespec_parse_line_offset): Export.
Issue error if STRING is not numerical.
(gdb_get_linespec_parser_quote_characters): New function.
* linespec.h (linespec_parse_line_offset): Declare.
(get_gdb_linespec_parser_quote_characters): Declare.
(is_ada_operator): Declare.
(find_toplevel_char): Declare.
(linespec_lexer_lex_keyword): Declare.
* location.c (explicit_to_event_location): New function.
(explicit_location_lex_one): New function.
(string_to_explicit_location): New function.
(string_to_event_location): Handle explicit locations.
* location.h (explicit_to_event_location): Declare.
(string_to_explicit_location): Declare.
gdb/testsuite/ChangeLog:
* gdb.linespec/3explicit.c: New file.
* gdb.linespec/cpexplicit.cc: New file.
* gdb.linespec/cpexplicit.exp: New file.
* gdb.linespec/explicit.c: New file.
* gdb.linespec/explicit.exp: New file.
* gdb.linespec/explicit2.c: New file.
* gdb.linespec/ls-errs.exp: Add explicit location tests.
* lib/gdb.exp (capture_command_output): Regexp-escape `command'
before using in the matching pattern.
Clarify that `prefix' is a regular expression.
This patch add support for explicit locations and switches many linespec
locations to this new location type. This patch also converts all
linespec locations entered by the user to an explicit representation
internally (thus bypassing the linespec parser when resetting the
breakpoint).
This patch does not introduce any user-visible changes.
gdb/ChangeLog:
* break-catch-throw.c (re_set_exception_catchpoint): Convert
linespec into explicit location.
* breakpoint.c (create_overlay_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Convert linespec into explicit
location.
(update_static_tracepoint): Convert linespec into explicit location.
* linespec.c (enum offset_relative_sign, struct line_offset): Move
location.h.
(struct linespec) <expression, expr_pc, source_filename>
<function_name, label_name, line_offset>: Replace with ...
<explicit>: ... this.
<is_linespec>: New member.
(PARSER_EXPLICIT): New accessor macro.
(undefined_label_error): New function.
(source_file_not_found_error): New function.
(linespec_parse_basic): The parser result is now an explicit location.
Use PARSER_EXPLICIT to access it.
Use undefined_label_error.
(canonicalize_linespec): Convert canonical linespec into explicit
location.
Move string representation of location to explicit_location_to_linespec
and use it and explicit_location_to_string to save string
representations of the canonical location.
(create_sals_line_offset, convert_linespec_to_sals): `ls' contains an
explicit location. Update all references.
(convert_explicit_location_to_sals): New function.
(parse_linespec): Use PARSER_EXPLICIT to access the parser
result's explicit location.
(linespec_state_constructor): Initialize is_linespec.
Use PARSER_EXPLICIT.
(linespec_parser_delete): Use PARSER_EXPLICIT to access the parser's
result.
(event_location_to_sals): For linespec locations, set is_linespec.
Handle explicit locations.
(decode_objc): 'ls' contains an explicit location now. Update all
references.
(symtabs_from_filename): Use source_file_not_found_error.
* location.c (struct event_location.u) <explicit>: New member.
(initialize_explicit_location): New function.
(initialize_event_location): Initialize explicit locations.
(new_explicit_location, get_explicit_location)
(get_explicit_location_const): New functions.
(explicit_to_string_internal): New function; most of contents moved
from canonicalize_linespec.
(explicit_location_to_string): New function.
(explicit_location_to_linespec): New function.
(copy_event_location, delete_event_location)
(event_location_to_string_const, event_location_empty_p): Handle
explicit locations.
* location.h (enum offset_relative_sign, struct line_offset): Move
here from linespec.h.
(enum event_location_type): Add EXPLICIT_LOCATION.
(struct explicit_location): New structure.
(explicit_location_to_string): Declare.
(explicit_location_to_linespec): Declare.
(new_explicit_location, get_explicit_locationp
(get_explicit_location_const, initialize_explicit_location): Declare.
This patch adds support for address locations, of the form "*ADDR".
[Support for address linespecs has been removed/replaced by this "new"
location type.] This patch also converts any existing address locations
from its previous linespec type.
gdb/ChangeLog:
* breakpoint.c (create_thread_event_breakpoint, init_breakpoint_sal):
Convert linespec to address location.
* linespec.c (canonicalize_linespec): Do not handle address
locations here.
(convert_address_location_to_sals): New function; contents moved
from ...
(convert_linespc_to_sals): ... here.
(parse_linespec): Remove address locations from linespec grammar.
Remove handling of address locations.
(linespec_lex_to_end): Remove handling of address linespecs.
(event_location_to_sals): Handle ADDRESS_LOCATION.
(linespec_expression_to_pc): Export.
* linespec.h (linespec_expression_to_pc): Add declaration.
* location.c (struct event_location.u) <address>: New member.
(new_address_location, get_address_location): New functions.
(copy_event_location, delete_event_location, event_location_to_string)
(string_to_event_location, event_location_empty_p): Handle address
locations.
* location.h (enum event_location_type): Add ADDRESS_LOCATION.
(new_address_location, get_address_location): Declare.
* python/py-finishbreakpoint.c (bpfinishpy_init): Convert linespec
to address location.
* spu-tdep.c (spu_catch_start): Likewise.
This patch converts the code base to use the new struct event_location
API being introduced. This patch preserves the current functionality and
adds no new features.
The "big picture" API usage introduced by this patch may be illustrated
with a simple exmaple. Where previously developers would write:
void
my_command (char *arg, int from_tty)
{
create_breakpoint (..., arg, ...);
...
}
one now uses:
void
my_command (char *arg, int from_tty)
{
struct event_locaiton *location;
struct cleanup *back_to;
location = string_to_event_locaiton (&arg, ...);
back_to = make_cleanup_delete_event_location (location);
create_breakpoint (..., location, ...);
do_cleanups (back_to);
}
Linespec-decoding functions (now called location-decoding) such as
decode_line_full no longer skip argument pointers over processed input.
That functionality has been moved into string_to_event_location as
demonstrated above.
gdb/ChangeLog
* ax-gdb.c: Include location.h.
(agent_command_1) Use linespec location instead of address
string.
* break-catch-throw.c: Include location.h.
(re_set_exception_catchpoint): Use linespec locations instead
of address strings.
* breakpoint.c: Include location.h.
(create_overlay_event_breakpoint, create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint, update_breakpoints_after_exec):
Use linespec location instead of address string.
(print_breakpoint_location): Use locations and
event_location_to_string.
Print extra_string for pending locations for non-MI streams.
(print_one_breakpoint_location): Use locations and
event_location_to_string.
(init_raw_breakpoint_without_location): Initialize b->location.
(create_thread_event_breakpoint): Use linespec location instead of
address string.
(init_breakpoint_sal): Likewise.
Only save extra_string if it is non-NULL and not the empty string.
Use event_location_to_string instead of `addr_string'.
Constify `p' and `endp'.
Use skip_spaces_const/skip_space_const instead of non-const versions.
Copy the location into the breakpoint.
If LOCATION is NULL, save the breakpoint address as a linespec location
instead of an address string.
(create_breakpoint_sal): Change `addr_string' parameter to a struct
event_location. All uses updated.
(create_breakpoints_sal): Likewise for local variable `addr_string'.
(parse_breakpoint_sals): Use locations instead of address strings.
Remove check for empty linespec with conditional.
Refactor.
(decode_static_tracepoint_spec): Make argument const and update
function.
(create_breakpoint): Change `arg' to a struct event_location and
rename.
Remove `copy_arg' and `addr_start'.
If EXTRA_STRING is empty, set it to NULL.
Don't populate `canonical' for pending breakpoints.
Pass `extra_string' to find_condition_and_thread.
Clear `extra_string' if `rest' was NULL.
Do not error with "garbage after location" if setting a dprintf
breakpoint.
Copy the location into the breakpoint instead of an address string.
(break_command_1): Use string_to_event_location and pass this to
create_breakpoint instead of an address string.
Check against `arg_cp' for a probe linespec.
(dprintf_command): Use string_to_event_location and pass this to
create_breakpoint instead of an address string.
Throw an exception if no format string was specified.
(print_recreate_ranged_breakpoint): Use event_location_to_string
instead of address strings.
(break_range_command, until_break_command)
(init_ada_exception_breakpoint): Use locations instead
of address strings.
(say_where): Print out extra_string for pending locations.
(base_breakpoint_dtor): Delete `location' and `location_range_end' of
the breakpoint.
(base_breakpoint_create_sals_from_location): Use struct event_location
instead of address string.
Remove `addr_start' and `copy_arg' parameters.
(base_breakpoint_decode_location): Use struct event_location instead of
address string.
(bkpt_re_set): Use locations instead of address strings.
Use event_location_empty_p to check for unset location.
(bkpt_print_recreate): Use event_location_to_string instead of
an address string.
Print out extra_string for pending locations.
(bkpt_create_sals_from_location, bkpt_decode_location)
(bkpt_probe_create_sals_from_location): Use struct event_location
instead of address string.
(bkpt_probe_decode_location): Use struct event_location instead of
address string.
(tracepoint_print_recreate): Use event_location_to_string to
recreate the tracepoint.
(tracepoint_create_sals_from_location, tracepoint_decode_location)
(tracepoint_probe_create_sals_from_location)
(tracepoint_probe_decode_location): Use struct event_location
instead of address string.
(dprintf_print_recreate): Use event_location_to_string to recreate
the dprintf.
(dprintf_re_set): Remove check for valid/missing format string.
(strace_marker_create_sals_from_location)
(strace_marker_create_breakpoints_sal, strace_marker_decode_location)
(update_static_tracepoint): Use struct event_location instead of
address string.
(location_to_sals): Likewise.
Pass `extra_string' to find_condition_and_thread.
For newly resolved pending breakpoint locations, clear the location's
string representation.
Assert that the breakpoint's condition string is NULL when
condition_not_parsed.
(breakpoint_re_set_default, create_sals_from_location_default)
(decode_location_default, trace_command, ftrace_command)
(strace_command, create_tracepoint_from_upload): Use locations
instead of address strings.
* breakpoint.h (struct breakpoint_ops) <create_sals_from_location>:
Use struct event_location instead of address string.
Update all uses.
<decode_location>: Likewise.
(struct breakpoint) <addr_string>: Change to struct event_location
and rename `location'.
<addr_string_range_end>: Change to struct event_location and rename
`location_range_end'.
(create_breakpoint): Use struct event_location instead of address
string.
* cli/cli-cmds.c: Include location.h.
(edit_command, list_command): Use locations instead of address strings.
* elfread.c: Include location.h.
(elf_gnu_ifunc_resolver_return_stop): Use event_location_to_string.
* guile/scm-breakpoint.c: Include location.h.
(bpscm_print_breakpoint_smob): Use event_location_to_string.
(gdbscm_register_breakpoint): Use locations instead of address
strings.
* linespec.c: Include location.h.
(struct ls_parser) <stream>: Change to const char *.
(PARSER_STREAM): Update.
(lionespec_lexer_lex_keyword): According to find_condition_and_thread,
keywords must be followed by whitespace.
(canonicalize_linespec): Save a linespec location into `canonical'.
Save a canonical linespec into `canonical'.
(parse_linespec): Change `argptr' to const char * and rename `arg'.
All uses updated.
Update function description.
(linespec_parser_new): Initialize `parser'.
Update initialization of parsing stream.
(event_location_to_sals): New function.
(decode_line_full): Change `argptr' to a struct event_location and
rename it `location'.
Use locations instead of address strings.
Call event_location_to_sals instead of parse_linespec.
(decode_line_1): Likewise.
(decode_line_with_current_source, decode_line_with_last_displayed)
Use locations instead of address strings.
(decode_objc): Likewise.
Change `argptr' to const char * and rename `arg'.
(destroy_linespec_result): Delete the linespec result's location
instead of freeing the address string.
* linespec.h (struct linespec_result) <addr_string>: Change to
struct event_location and rename to ...
<location>: ... this.
(decode_line_1, decode_line_full): Change `argptr' to struct
event_location. All callers updated.
* mi/mi-cmd-break.c: Include language.h, location.h, and linespec.h.
(mi_cmd_break_insert_1): Use locations instead of address strings.
Throw an error if there was "garbage" at the end of the specified
linespec.
* probe.c: Include location.h.
(parse_probes): Change `argptr' to struct event_location.
Use event locations instead of address strings.
* probe.h (parse_probes): Change `argptr' to struct event_location.
* python/py-breakpoint.c: Include location.h.
(bppy_get_location): Constify local variable `str'.
Use event_location_to_string.
(bppy_init): Use locations instead of address strings.
* python/py-finishbreakpoint.c: Include location.h.
(bpfinishpy_init): Remove local variable `addr_str'.
Use locations instead of address strings.
* python/python.c: Include location.h.
(gdbpy_decode_line): Use locations instead of address strings.
* remote.c: Include location.h.
(remote_download_tracepoint): Use locations instead of address
strings.
* spu-tdep.c: Include location.h.
(spu_catch_start): Remove local variable `buf'.
Use locations instead of address strings.
* tracepoint.c: Include location.h.
(scope_info): Use locations instead of address strings.
(encode_source_string): Constify parameter `src'.
* tracepoint.h (encode_source_string): Likewise.
gdb/testsuite/ChangeLog
* gdb.base/dprintf-pending.exp: Update dprintf "without format"
test.
Add tests for missing ",FMT" and ",".
This patch introduces the new breakpoint/"linespec" API based on
a new struct event_location. This API currently only supports
traditional linespecs, maintaining the status quo of the code base.
Future patches will add additional functionality for other location
types such as address locations.
gdb/ChangeLog:
* Makefile.in (SFILES): Add location.c.
(HFILES_NO_SRCDIR): Add location.h.
(COMMON_OBS): Add location.o.
* linespec.c (linespec_lex_to_end): New function.
* linespec.h (linespec_lex_to_end): Declare.
* location.c: New file.
* location.h: New file.
This patch renames all occurrances of "addr_string" and "address
string" in the breakpoint/linespec APIs. This will emphasize the
change from address strings used in setting breakpoints (et al) to the
new locations-based API introduced in subsequent patches.
gdb/ChangeLog:
* breakpoint.h (struct breakpoint_ops) <create_sals_from_address>:
Renamed to create_sals_from_location.
<decode_linespec>: Renamed to decode_location.
Update all callers.
* breakpoint.c (create_sals_from_address_default): Renamed to ...
(create_sals_from_location_default): ... this.
(addr_string_to_sals): Renamed to ...
(location_to_sals): ... this.
(decode_linespec_default): Renamed to ...
(decode_location_default): ... this.
(base_breakpoint_create_sals_from_address): Renamed to ...
(base_breakpoint_create_sals_from_location): ... this.
(bkpt_create_sals_from_address): Renamed to ...
(bkpt_create_sals_from_location): ... this.
(bkpt_decode_linespec): Renamed to ...
(bkpt_decode_location): ... this.
(bkpt_probe_create_sals_from_address): Renamed to ...
(bkpt_probe_create_sals_from_location): ... this.
(tracepoint_create_sals_from_address): Renamed to ...
(tracepoint_create_sals_from_location): ... this.
(tracepoint_decode_linespec): Renamed to ...
(tracepoint_decode_location): ... this.
(tracepoint_probe_create_sals_from_address): Renamed to ...
(tracepoint_probe_create_sals_from_location): ... this.
(tracepoint_probe_decode_linespec): Renamed to ...
(tracepoint_probe_decode_location): ... this.
(strace_marker_create_sals_from_address): Renamed to ...
(strace_marker_create_sals_from_location): ... this.
(decode_linespec_default): Renamed to ...
(decode_location_default): ... this.
2015-08-11 Jiong Wang <jiong.wang@arm.com>
bfd/
* elfnn-aarch64.c (IS_AARCH64_TLS_RELAX_RELOC): New.
(aarch64_can_relax_tls): Use the new IS_AARCH64_TLS_RELAX_RELOC.
2015-08-11 Jiong Wang <jiong.wang@arm.com>
bfd/
* bfd/elfnn-aarch64.c (aarch64_type_of_stub): New parameter "sym_sec".
Loose the check for symbol from ABS section.
(elfNN_aarch64_size_stubs): Pass sym_sec.
ld/testsuite/
* ld-aarch64/farcall-b-defsym.s: New test.
* ld-aarch64/farcall-bl-defsym.s: Likewise.
* ld-aarch64/farcall-b-defsym.d: New expectation.
* ld-aarch64/farcall-bl-defsym.d: Likewise.
Some targets provide aligned .bss sections, so explicitly align.
msp430 and rl78 emit "magic" symbols when assembling symbol.s, and
mips targets emit STT_OBJECT rather than STT_NOTYPE syms.
* binutils-all/strip-12.s: Align .bss section.
* binutils-all/strip-12.d: Adjust.
* binutils-all/symbols-1.d: Allow extraneous symbols.
* binutils-all/symbols-2.d: Likewise, and V for weakened syms.
* binutils-all/symbols-3.d: Likewise.
* binutils-all/symbols-4.d: Likewise.
PR gas/18765
* config/tc-arm.c (move_or_literal_pool): Use U suffix to remove
compile time warnings about constant expressions being shifted
into bit 31.
(do_iwmmxt_wldstd): Likewise.
(do_iwmmxt_wrwrwr_or_imm5): Likewise.
(md_assemble): Likewise.
Test symbols did not demangle as per the d-demangle-expected tests because
strtod() on Solaris 9 does not accept hexadecimal numbers.
This has now been fixed up so that no attempt at formatting/converting the
demangled hexadecimal literals are done.
libiberty/ChangeLog:
2015-08-11 Iain Buclaw <ibuclaw@gdcproject.org>
* d-demangle.c (dlang_parse_real): Remove call to strtod.
(strtod): Remove declaration.
* testsuite/d-demangle-expected: Update float and complex literal
tests to check correct hexadecimal demangling.
gdb/ChangeLog:
* symtab.c (make_file_symbol_completion_list_1): Renamed from
make_file_symbol_completion_list and made static.
(make_file_symbol_completion_list): New function.
gdb/testsuite/ChangeLog:
* gdb.base/completion.exp: Add location completer tests.
This patch replaces the "hidden" field with the "versioned" field in
elf_link_hash_entry so that we can avoid calling strchr and strrchr if
the symbol is unversioned.
* elf-bfd.h (elf_symbol_version): New enum.
(elf_link_hash_entry): Replace hidden with versioned.
* elflink.c (_bfd_elf_merge_symbol): Don't look for symbol
version if the symbol is unversioned. Initialize versioned.
(_bfd_elf_add_default_symbol): Don't look for symbol version
if the symbol is unversioned or hidden. Initialize versioned.
(elf_collect_hash_codes): Don't look for symbol version if the
symbol is unversioned.
(elf_collect_gnu_hash_codes): Likewise.
(bfd_elf_gc_mark_dynamic_ref_symbol): Likewise.
(_bfd_elf_link_hash_copy_indirect): Check versioned instead of
hidden.
(elf_link_output_extsym): Likewise.
H.J. Lu
Nick Clifton
Luis Machado
Thomas Preud'homme
Keith Seitz
GDB Administrator
Jiong Wang
Peter Zotov
Alan Modra
Iain Buclaw
Doug Evans
Joel Brobecker
Robert Suchanek
Hans-Peter Nilsson