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As a follow up to:
http://sourceware.org/ml/gdb-patches/2013-03/msg00449.html
In a nutshell, casts between 'char **' <-> 'unsigned char **' and
'char **' <-> 'const char **' are invalid.
I grepped for "\*\*) &" and found these. There's another one in
demangle.c, but I've split fixing that one to a separate patch.
I think the ada_decode_symbol change is perhaps the one that could be
surprising. The function's description has this comment, which makes
things much clearer:
The GSYMBOL parameter is "mutable" in the C++ sense: logically
const, but nevertheless modified to a semantically equivalent form
when a decoded name is cached in it. */
const char *
ada_decode_symbol (const struct general_symbol_info *gsymbol)
With that out of the way, I think the patch ends up being pretty
obvious.
Tested on x86_64 Fedora 17.
gdb/
2013-03-13 Pedro Alves <palves@redhat.com>
* ada-lang.c (ada_decode_symbol): Cast away constness of GSYMBOL
rather than casting 'const char * const *' to 'const char **'.
* ada-lex.l (processInt): Make "trailer" local const. Remove
'const char **' cast.
* arm-linux-tdep.c (arm_stap_parse_special_token): Add 'char *'
locals, and use those as strtol output pointer, instead than doing
invalid casts to from 'const char **' to 'char **'.
(_initialize_demangle): Remove cast.
* i386-tdep.c (i386_stap_parse_special_token): : Add 'char *'
locals, and use those as strtol output pointer, instead than doing
invalid casts to from 'const char **' to 'char **'.
* solib-dsbt.c (dsbt_get_initial_loadmaps): Remove 'gdb_byte**'
casts.
* stap-probe.c (stap_parse_register_operand)
(stap_parse_single_operand): Likewise.
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$ make WERROR_CFLAGS="-Wpointer-sign -Werror" stap-probe.o 2>&1 1>/dev/null
../../src/gdb/stap-probe.c: In function ‘handle_stap_probe’:
../../src/gdb/stap-probe.c:1306:19: error: pointer targets in assignment differ in signedness [-Werror=pointer-sign]
cc1: all warnings being treated as errors
make: *** [stap-probe.o] Error 1
provider is a string, so it's rightfully a char*. 'data' holds raw
bytes (bfd_byte), so a cast is the right thing to do.
gdb/
2013-03-07 Pedro Alves <palves@redhat.com>
* stap-probe.c (handle_stap_probe): Add cast to char*.
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Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
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* dwarf2loc.c (entry_values_debug): Add 'unsigned'.
(_initialize_dwarf2loc): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* dwarf2loc.h: Update the declaration of 'entry_values_debug'.
* dwarf2read.c (dwarf2_die_debug): Add 'unsigned'.
(_initialize_dwarf2_read): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* darwin-nat.c (dwarwin_debug_flag): Add 'unsigned'.
(_initialize_darwin_inferior): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* frame.c (frame_debug): Add 'unsigned'.
(_intialize_frame): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* frame.h: Update the declaration of 'frame_debug'.
* gdbtypes.c (overload_debug): Add 'unsigned'.
(_initialize_gdbtypes): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* inferior.h: Update declaration of 'debug_infrun'.
* infrun.c (debug_infrun): Add 'unsigned'.
(_initialize_infrun): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* jit.c (jit_debug): Add 'unsigned'.
(_initialize_jit): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* linux-nat.c (debug_linux_nat): Add 'unsigned'.
(_initialize_linux_nat): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* linux-thread-db.c (libthread_db_debug): Add 'unsigned'.
(_initialize_thread_db): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* machoread.c (mach_o_debug_level): Add 'unsigned'.
(_initialize_machoread): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* mi/mi-cmd-var.c: Update the declaration of 'varobjdebug'.
* microblaze-tdep.c (microblaze_debug_flag): Add 'unsigned'.
(_initialize_microblaze_tdep): Call add_setshow_zuinteger_cmd
intead of add_setshow_zinteger_cmd.
* mips-tdep.c (mips_debug): Add 'unsigned'.
(_initialize_mips_tdep): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* monitor.c (monitor_debug): Add 'unsigned'.
(_initialize_remote_monitors): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* observer.c (observer_debug): Add 'unsigned'.
(_initialize_observer): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* parse.c (expressiondebug): Add 'unsigned'.
(_initialize_parse): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* record.c (record_debug): Add 'unsigned'.
(_initialize_record): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* record.h: Update the declaration of 'record_debug'.
* stap-probe.c (stap_expression_debug): Add 'unsigned'.
(_initialize_stap_probe): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* serial.c (global_serial_debug_p): Add 'unsigned'.
(_initialize_serial): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* solib-dsbt.c (solib_dsbt_debug): Add 'unsigned'.
(_initialize_dsbt_solib): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* solib-frv.c (solib_frv_debug): Add 'unsigned'.
(_initialize_frv_solib): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* target.c (targetdebug): Add 'unsigned'.
(initialize_targets): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* valops.c (overload_debug): Add 'unsigned'.
* varobj.c (varobjdebug): Add 'unsigned'.
(_initialize_varobj): Call add_setshow_zuinteger_cmd instead of
add_setshow_zinteger_cmd.
* xtensa-tdep.c (xtensa_debug_level): Add 'unsigned'.
(_initialize_xtensa_tdep): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* arch-utils.h: Remove the declaration of 'gdbarch_debug'.
* gdbarch.sh (gdbarch_debug): Add 'unsigned'.
(extern void _initialize_gdbarch): Call add_setshow_zuinteger_cmd
instead of add_setshow_zinteger_cmd.
* gdbarch.c, gdbarch.h: Re-generated.
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* probe.c (probe_safe_evaluate_at_pc): Rename variable `n_probes'.
* stap-probe.c (compile_probe_arg): Likewise.
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* elfread.c (elf_get_probe_argument_count): Remove `objfile' argument.
(elf_compile_to_ax): Likewise.
* infrun.c (insert_exception_resume_from_probe): Likewise.
(check_exception_resume): Remove `objfile' variable.
* probe.c (find_probe_by_pc): Remove `objfile' argument.
(struct probe_and_objfile, probe_and_objfile_s): Delete.
(collect_probes): Adjust return value to `VEC (probe_p) *'.
(compare_entries): Rename to...
(compare_probes): ...this. Adjust function to work with
`struct probe *'. Rename variables `ea' and `eb' to `pa' and `pb'
respectively.
(gen_ui_out_table_header_info): Adjust `probes' argument to be
`VEC (probe_p) *'.
(print_ui_out_info): Adjust argument to be `struct probe *'.
(info_probes_for_ops): Adjust internal computations to use
`VEC (probe_p) *'.
(probe_safe_evaluate_at_pc): Refactor to not pass `objfile' anymore.
* probe.h (struct probe_ops) <get_probe_argument_count, compile_to_ax,
gen_info_probes_table_values>: Remove `objfile' argument.
(struct probe) <objfile>: New field.
(find_probe_by_pc): Remove `objfile' argument.
* stap-probe.c (stap_parse_probe_arguments): Likewise.
(stap_get_probe_argument_count): Likewise.
(stap_get_arg): Likewise.
(stap_evaluate_probe_argument): Likewise.
(stap_compile_to_ax): Likewise.
(compile_probe_arg): Refactor not to pass `objfile' anymore.
(handle_stap_probe): Fill `objfile' field from `struct probe'.
(stap_gen_info_probes_table_header): Remove `objfile' argument.
* symfile.h (struct sym_probe_fns) <sym_evaluate_probe_argument,
sym_compile_to_ax>: Likewise.
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* probe.c (parse_probes): Move conditional to check for
debuginfo files from here...
* stap-probe.c (stap_get_probes): ... to here.
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* stap-probe.c (stap_is_operator): Change declaration.
(stap_get_opcode): Change return value.
(stap_parse_argument_1): Update calls to `stap_get_opcode' and
`stap_parse_argument_1'.
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* i386-tdep.c (i386_stap_parse_special_token) <s>: Remove unused
variable.
* stap-probe.c (stap_parse_single_operand) <reg_suffix,
reg_ind_suffix, reg_suffix_len, reg_ind_suffix_len>: Likewise.
(stap_parse_argument) <e>: Likewise.
(handle_stap_probe) <byte_order>: Likewise.
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Tom Tromey <tromey@redhat.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
* Makefile.in (SFILES): Add `probe' and `stap-probe'.
(COMMON_OBS): Likewise.
(HFILES_NO_SRCDIR): Add `probe'.
* NEWS: Mention support for static and SystemTap probes.
* amd64-tdep.c (amd64_init_abi): Initializing proper fields used by
SystemTap probes' arguments parser.
* arm-linux-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(arm_stap_is_single_operand): New function.
(arm_stap_parse_special_token): Likewise.
(arm_linux_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* ax-gdb.c (require_rvalue): Removing static declaration.
(gen_expr): Likewise.
* ax-gdb.h (gen_expr): Declaring function.
(require_rvalue): Likewise.
* breakpoint.c: Include `gdb_regex.h' and `probe.h'.
(bkpt_probe_breakpoint_ops): New variable.
(momentary_breakpoint_from_master): Set the `probe' value.
(add_location_to_breakpoint): Likewise.
(break_command_1): Using proper breakpoint_ops according to the
argument passed by the user in the command line.
(bkpt_probe_insert_location): New function.
(bkpt_probe_remove_location): Likewise.
(bkpt_probe_create_sals_from_address): Likewise.
(bkpt_probe_decode_linespec): Likewise.
(tracepoint_probe_create_sals_from_address): Likewise.
(tracepoint_probe_decode_linespec): Likewise.
(tracepoint_probe_breakpoint_ops): New variable.
(trace_command): Using proper breakpoint_ops according to the
argument passed by the user in the command line.
(initialize_breakpoint_ops): Initializing breakpoint_ops for
static probes on breakpoints and tracepoints.
* breakpoint.h (struct bp_location) <probe>: New field.
* cli-utils.c (skip_spaces_const): New function.
(extract_arg): Likewise.
* cli-utils.h (skip_spaces_const): Likewise.
(extract_arg): Likewise.
* coffread.c (coff_sym_fns): Add `sym_probe_fns' value.
* configure.ac: Append `stap-probe.o' to be generated when ELF
support is present.
* configure: Regenerate.
* dbxread.c (aout_sym_fns): Add `sym_probe_fns' value.
* elfread.c: Include `probe.h' and `arch-utils.h'.
(probe_key): New variable.
(elf_get_probes): New function.
(elf_get_probe_argument_count): Likewise.
(elf_evaluate_probe_argument): Likewise.
(elf_compile_to_ax): Likewise.
(elf_symfile_relocate_probe): Likewise.
(stap_probe_key_free): Likewise.
(elf_probe_fns): New variable.
(elf_sym_fns): Add `sym_probe_fns' value.
(elf_sym_fns_lazy_psyms): Likewise.
(elf_sym_fns_gdb_index): Likewise.
(_initialize_elfread): Initialize objfile cache for static
probes.
* gdb_vecs.h (struct probe): New forward declaration.
(probe_p): New VEC declaration.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh (stap_integer_prefix): New variable.
(stap_integer_suffix): Likewise.
(stap_register_prefix): Likewise.
(stap_register_suffix): Likewise.
(stap_register_indirection_prefix): Likewise.
(stap_register_indirection_suffix): Likewise.
(stap_gdb_register_prefix): Likewise.
(stap_gdb_register_suffix): Likewise.
(stap_is_single_operand): New function.
(stap_parse_special_token): Likewise.
(struct stap_parse_info): Forward declaration.
* i386-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(i386_stap_is_single_operand): New function.
(i386_stap_parse_special_token): Likewise.
(i386_elf_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* i386-tdep.h (i386_stap_is_single_operand): New function.
(i386_stap_parse_special_token): Likewise.
* machoread.c (macho_sym_fns): Add `sym_probe_fns' value.
* mipsread.c (ecoff_sym_fns): Likewise.
* objfiles.c (objfile_relocate1): Support relocation for static
probes.
* parse.c (prefixify_expression): Remove static declaration.
(initialize_expout): Likewise.
(reallocate_expout): Likewise.
* parser-defs.h (initialize_expout): Declare function.
(reallocate_expout): Likewise.
(prefixify_expression): Likewise.
* ppc-linux-tdep.c: Including headers needed to perform the parsing
of SystemTap probes' arguments.
(ppc_stap_is_single_operand): New function.
(ppc_stap_parse_special_token): Likewise.
(ppc_linux_init_abi): Initializing proper fields used by SystemTap
probes' arguments parser.
* probe.c: New file, for generic statically defined probe support.
* probe.h: Likewise.
* s390-tdep.c: Including headers needed to perform the parsing of
SystemTap probes' arguments.
(s390_stap_is_single_operand): New function.
(s390_gdbarch_init): Initializing proper fields used by SystemTap
probes' arguments parser.
* somread.c (som_sym_fns): Add `sym_probe_fns' value.
* stap-probe.c: New file, for SystemTap probe support.
* stap-probe.h: Likewise.
* symfile.h: Include `gdb_vecs.h'.
(struct sym_probe_fns): New struct.
(struct sym_fns) <sym_probe_fns>: New field.
* symtab.c (init_sal): Initialize `probe' field.
* symtab.h (struct probe): Forward declaration.
(struct symtab_and_line) <probe>: New field.
* tracepoint.c (start_tracing): Adjust semaphore on breakpoints
locations.
(stop_tracing): Likewise.
* xcoffread.c (xcoff_sym_fns): Add `sym_probe_fns' value.
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