2012-04-25 16:07:23 +02:00
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/* Go language support routines for GDB, the GNU debugger.
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2015-01-01 10:32:14 +01:00
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Copyright (C) 2012-2015 Free Software Foundation, Inc.
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2012-04-25 16:07:23 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* TODO:
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- split stacks
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- printing of native types
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- goroutines
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- lots more
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- gccgo mangling needs redoing
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It's too hard, for example, to know whether one is looking at a mangled
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Go symbol or not, and their are ambiguities, e.g., the demangler may
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get passed *any* symbol, including symbols from other languages
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and including symbols that are already demangled.
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One thought is to at least add an _G prefix.
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- 6g mangling isn't supported yet
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*/
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#include "defs.h"
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#include "gdb_obstack.h"
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#include "block.h"
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#include "symtab.h"
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#include "language.h"
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2013-10-17 15:15:21 +02:00
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#include "varobj.h"
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2012-04-25 16:07:23 +02:00
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#include "go-lang.h"
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#include "c-lang.h"
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#include "parser-defs.h"
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#include <ctype.h>
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/* The main function in the main package. */
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static const char GO_MAIN_MAIN[] = "main.main";
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/* Function returning the special symbol name used by Go for the main
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procedure in the main program if it is found in minimal symbol list.
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This function tries to find minimal symbols so that it finds them even
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if the program was compiled without debugging information. */
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const char *
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go_main_name (void)
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{
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use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
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struct bound_minimal_symbol msym;
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2012-04-25 16:07:23 +02:00
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msym = lookup_minimal_symbol (GO_MAIN_MAIN, NULL, NULL);
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use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
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if (msym.minsym != NULL)
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2012-04-25 16:07:23 +02:00
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return GO_MAIN_MAIN;
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/* No known entry procedure found, the main program is probably not Go. */
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return NULL;
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}
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/* Return non-zero if TYPE is a gccgo string.
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We assume CHECK_TYPEDEF has already been done. */
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static int
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gccgo_string_p (struct type *type)
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{
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/* gccgo strings don't necessarily have a name we can use. */
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if (TYPE_NFIELDS (type) == 2)
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{
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struct type *type0 = TYPE_FIELD_TYPE (type, 0);
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struct type *type1 = TYPE_FIELD_TYPE (type, 1);
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2015-07-06 22:05:06 +02:00
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type0 = check_typedef (type0);
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type1 = check_typedef (type1);
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2012-04-25 16:07:23 +02:00
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if (TYPE_CODE (type0) == TYPE_CODE_PTR
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&& strcmp (TYPE_FIELD_NAME (type, 0), "__data") == 0
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&& TYPE_CODE (type1) == TYPE_CODE_INT
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&& strcmp (TYPE_FIELD_NAME (type, 1), "__length") == 0)
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{
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struct type *target_type = TYPE_TARGET_TYPE (type0);
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2015-07-06 22:05:06 +02:00
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target_type = check_typedef (target_type);
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2012-04-25 16:07:23 +02:00
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if (TYPE_CODE (target_type) == TYPE_CODE_INT
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&& TYPE_LENGTH (target_type) == 1
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&& strcmp (TYPE_NAME (target_type), "uint8") == 0)
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return 1;
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}
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}
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return 0;
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}
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/* Return non-zero if TYPE is a 6g string.
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We assume CHECK_TYPEDEF has already been done. */
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static int
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sixg_string_p (struct type *type)
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{
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if (TYPE_NFIELDS (type) == 2
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&& TYPE_TAG_NAME (type) != NULL
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&& strcmp (TYPE_TAG_NAME (type), "string") == 0)
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return 1;
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return 0;
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}
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/* Classify the kind of Go object that TYPE is.
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TYPE is a TYPE_CODE_STRUCT, used to represent a Go object. */
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enum go_type
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go_classify_struct_type (struct type *type)
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{
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2015-07-06 22:05:06 +02:00
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type = check_typedef (type);
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2012-04-25 16:07:23 +02:00
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/* Recognize strings as they're useful to be able to print without
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pretty-printers. */
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if (gccgo_string_p (type)
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|| sixg_string_p (type))
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return GO_TYPE_STRING;
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return GO_TYPE_NONE;
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}
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/* Subroutine of unpack_mangled_go_symbol to simplify it.
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Given "[foo.]bar.baz", store "bar" in *PACKAGEP and "baz" in *OBJECTP.
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We stomp on the last '.' to nul-terminate "bar".
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The caller is responsible for memory management. */
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static void
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unpack_package_and_object (char *buf,
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const char **packagep, const char **objectp)
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{
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char *last_dot;
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last_dot = strrchr (buf, '.');
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gdb_assert (last_dot != NULL);
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*objectp = last_dot + 1;
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*last_dot = '\0';
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last_dot = strrchr (buf, '.');
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if (last_dot != NULL)
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*packagep = last_dot + 1;
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else
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*packagep = buf;
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}
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/* Given a mangled Go symbol, find its package name, object name, and
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method type (if present).
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E.g., for "libgo_net.textproto.String.N33_libgo_net.textproto.ProtocolError"
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*PACKAGEP = "textproto"
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*OBJECTP = "String"
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*METHOD_TYPE_PACKAGEP = "textproto"
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*METHOD_TYPE_OBJECTP = "ProtocolError"
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Space for the resulting strings is malloc'd in one buffer.
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PACKAGEP,OBJECTP,METHOD_TYPE* will (typically) point into this buffer.
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[There are a few exceptions, but the caller is still responsible for
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freeing the resulting pointer.]
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A pointer to this buffer is returned, or NULL if symbol isn't a
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mangled Go symbol.
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The caller is responsible for freeing the result.
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*METHOD_TYPE_IS_POINTERP is set to a boolean indicating if
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the method type is a pointer.
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There may be value in returning the outer container,
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i.e., "net" in the above example, but for now it's not needed.
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Plus it's currently not straightforward to compute,
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it comes from -fgo-prefix, and there's no algorithm to compute it.
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If we ever need to unpack the method type, this routine should work
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for that too. */
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static char *
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unpack_mangled_go_symbol (const char *mangled_name,
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const char **packagep,
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const char **objectp,
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const char **method_type_packagep,
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const char **method_type_objectp,
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int *method_type_is_pointerp)
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{
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char *buf;
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char *p;
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int len = strlen (mangled_name);
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/* Pointer to last digit in "N<digit(s)>_". */
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char *saw_digit;
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|
|
/* Pointer to "N" if valid "N<digit(s)>_" found. */
|
|
|
|
char *method_type;
|
|
|
|
/* Pointer to the first '.'. */
|
|
|
|
char *first_dot;
|
|
|
|
/* Pointer to the last '.'. */
|
|
|
|
char *last_dot;
|
|
|
|
/* Non-zero if we saw a pointer indicator. */
|
|
|
|
int saw_pointer;
|
|
|
|
|
|
|
|
*packagep = *objectp = NULL;
|
|
|
|
*method_type_packagep = *method_type_objectp = NULL;
|
|
|
|
*method_type_is_pointerp = 0;
|
|
|
|
|
|
|
|
/* main.init is mangled specially. */
|
|
|
|
if (strcmp (mangled_name, "__go_init_main") == 0)
|
|
|
|
{
|
|
|
|
char *package = xstrdup ("main");
|
|
|
|
|
|
|
|
*packagep = package;
|
|
|
|
*objectp = "init";
|
|
|
|
return package;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* main.main is mangled specially (missing prefix). */
|
|
|
|
if (strcmp (mangled_name, "main.main") == 0)
|
|
|
|
{
|
|
|
|
char *package = xstrdup ("main");
|
|
|
|
|
|
|
|
*packagep = package;
|
|
|
|
*objectp = "main";
|
|
|
|
return package;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We may get passed, e.g., "main.T.Foo", which is *not* mangled.
|
|
|
|
Alas it looks exactly like "prefix.package.object."
|
|
|
|
To cope for now we only recognize the following prefixes:
|
|
|
|
|
|
|
|
go: the default
|
|
|
|
libgo_.*: used by gccgo's runtime
|
|
|
|
|
|
|
|
Thus we don't support -fgo-prefix (except as used by the runtime). */
|
2015-03-06 10:42:06 +01:00
|
|
|
if (!startswith (mangled_name, "go.")
|
|
|
|
&& !startswith (mangled_name, "libgo_"))
|
2012-04-25 16:07:23 +02:00
|
|
|
return NULL;
|
|
|
|
|
|
|
|
/* Quick check for whether a search may be fruitful. */
|
|
|
|
/* Ignore anything with @plt, etc. in it. */
|
|
|
|
if (strchr (mangled_name, '@') != NULL)
|
|
|
|
return NULL;
|
|
|
|
/* It must have at least two dots. */
|
|
|
|
first_dot = strchr (mangled_name, '.');
|
|
|
|
if (first_dot == NULL)
|
|
|
|
return NULL;
|
|
|
|
/* Treat "foo.bar" as unmangled. It can collide with lots of other
|
|
|
|
languages and it's not clear what the consequences are.
|
|
|
|
And except for main.main, all gccgo symbols are at least
|
|
|
|
prefix.package.object. */
|
|
|
|
last_dot = strrchr (mangled_name, '.');
|
|
|
|
if (last_dot == first_dot)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
/* More quick checks. */
|
|
|
|
if (last_dot[1] == '\0' /* foo. */
|
|
|
|
|| last_dot[-1] == '.') /* foo..bar */
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
/* At this point we've decided we have a mangled Go symbol. */
|
|
|
|
|
|
|
|
buf = xstrdup (mangled_name);
|
|
|
|
|
|
|
|
/* Search backwards looking for "N<digit(s)>". */
|
|
|
|
p = buf + len;
|
|
|
|
saw_digit = method_type = NULL;
|
|
|
|
saw_pointer = 0;
|
|
|
|
while (p > buf)
|
|
|
|
{
|
|
|
|
int current = *(const unsigned char *) --p;
|
|
|
|
int current_is_digit = isdigit (current);
|
|
|
|
|
|
|
|
if (saw_digit)
|
|
|
|
{
|
|
|
|
if (current_is_digit)
|
|
|
|
continue;
|
|
|
|
if (current == 'N'
|
|
|
|
&& ((p > buf && p[-1] == '.')
|
|
|
|
|| (p > buf + 1 && p[-1] == 'p' && p[-2] == '.')))
|
|
|
|
{
|
|
|
|
if (atoi (p + 1) == strlen (saw_digit + 2))
|
|
|
|
{
|
|
|
|
if (p[-1] == '.')
|
|
|
|
method_type = p - 1;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
gdb_assert (p[-1] == 'p');
|
|
|
|
saw_pointer = 1;
|
|
|
|
method_type = p - 2;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Not what we're looking for, reset and keep looking. */
|
|
|
|
saw_digit = NULL;
|
|
|
|
saw_pointer = 0;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (current_is_digit && p[1] == '_')
|
|
|
|
{
|
|
|
|
/* Possible start of method "this" [sic] type. */
|
|
|
|
saw_digit = p;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (method_type != NULL
|
|
|
|
/* Ensure not something like "..foo". */
|
|
|
|
&& (method_type > buf && method_type[-1] != '.'))
|
|
|
|
{
|
|
|
|
unpack_package_and_object (saw_digit + 2,
|
|
|
|
method_type_packagep, method_type_objectp);
|
|
|
|
*method_type = '\0';
|
|
|
|
*method_type_is_pointerp = saw_pointer;
|
|
|
|
}
|
|
|
|
|
|
|
|
unpack_package_and_object (buf, packagep, objectp);
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Implements the la_demangle language_defn routine for language Go.
|
|
|
|
|
|
|
|
N.B. This may get passed *any* symbol, including symbols from other
|
|
|
|
languages and including symbols that are already demangled.
|
|
|
|
Both of these situations are kinda unfortunate, but that's how things
|
|
|
|
are today.
|
|
|
|
|
|
|
|
N.B. This currently only supports gccgo's mangling.
|
|
|
|
|
|
|
|
N.B. gccgo's mangling needs, I think, changing.
|
|
|
|
This demangler can't work in all situations,
|
|
|
|
thus not too much effort is currently put into it. */
|
|
|
|
|
|
|
|
char *
|
|
|
|
go_demangle (const char *mangled_name, int options)
|
|
|
|
{
|
|
|
|
struct obstack tempbuf;
|
|
|
|
char *result;
|
|
|
|
char *name_buf;
|
|
|
|
const char *package_name;
|
|
|
|
const char *object_name;
|
|
|
|
const char *method_type_package_name;
|
|
|
|
const char *method_type_object_name;
|
|
|
|
int method_type_is_pointer;
|
|
|
|
|
|
|
|
if (mangled_name == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
name_buf = unpack_mangled_go_symbol (mangled_name,
|
|
|
|
&package_name, &object_name,
|
|
|
|
&method_type_package_name,
|
|
|
|
&method_type_object_name,
|
|
|
|
&method_type_is_pointer);
|
|
|
|
if (name_buf == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
obstack_init (&tempbuf);
|
|
|
|
|
|
|
|
/* Print methods as they appear in "method expressions". */
|
|
|
|
if (method_type_package_name != NULL)
|
|
|
|
{
|
|
|
|
/* FIXME: Seems like we should include package_name here somewhere. */
|
|
|
|
if (method_type_is_pointer)
|
|
|
|
obstack_grow_str (&tempbuf, "(*");
|
|
|
|
obstack_grow_str (&tempbuf, method_type_package_name);
|
|
|
|
obstack_grow_str (&tempbuf, ".");
|
|
|
|
obstack_grow_str (&tempbuf, method_type_object_name);
|
|
|
|
if (method_type_is_pointer)
|
|
|
|
obstack_grow_str (&tempbuf, ")");
|
|
|
|
obstack_grow_str (&tempbuf, ".");
|
|
|
|
obstack_grow_str (&tempbuf, object_name);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
obstack_grow_str (&tempbuf, package_name);
|
|
|
|
obstack_grow_str (&tempbuf, ".");
|
|
|
|
obstack_grow_str (&tempbuf, object_name);
|
|
|
|
}
|
|
|
|
obstack_grow_str0 (&tempbuf, "");
|
|
|
|
|
|
|
|
result = xstrdup (obstack_finish (&tempbuf));
|
|
|
|
obstack_free (&tempbuf, NULL);
|
|
|
|
xfree (name_buf);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Given a Go symbol, return its package or NULL if unknown.
|
|
|
|
Space for the result is malloc'd, caller must free. */
|
|
|
|
|
|
|
|
char *
|
|
|
|
go_symbol_package_name (const struct symbol *sym)
|
|
|
|
{
|
|
|
|
const char *mangled_name = SYMBOL_LINKAGE_NAME (sym);
|
|
|
|
const char *package_name;
|
|
|
|
const char *object_name;
|
|
|
|
const char *method_type_package_name;
|
|
|
|
const char *method_type_object_name;
|
|
|
|
int method_type_is_pointer;
|
|
|
|
char *name_buf;
|
|
|
|
char *result;
|
|
|
|
|
|
|
|
gdb_assert (SYMBOL_LANGUAGE (sym) == language_go);
|
|
|
|
name_buf = unpack_mangled_go_symbol (mangled_name,
|
|
|
|
&package_name, &object_name,
|
|
|
|
&method_type_package_name,
|
|
|
|
&method_type_object_name,
|
|
|
|
&method_type_is_pointer);
|
|
|
|
/* Some Go symbols don't have mangled form we interpret (yet). */
|
|
|
|
if (name_buf == NULL)
|
|
|
|
return NULL;
|
|
|
|
result = xstrdup (package_name);
|
|
|
|
xfree (name_buf);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the package that BLOCK is in, or NULL if there isn't one.
|
|
|
|
Space for the result is malloc'd, caller must free. */
|
|
|
|
|
|
|
|
char *
|
|
|
|
go_block_package_name (const struct block *block)
|
|
|
|
{
|
|
|
|
while (block != NULL)
|
|
|
|
{
|
|
|
|
struct symbol *function = BLOCK_FUNCTION (block);
|
|
|
|
|
|
|
|
if (function != NULL)
|
|
|
|
{
|
|
|
|
char *package_name = go_symbol_package_name (function);
|
|
|
|
|
|
|
|
if (package_name != NULL)
|
|
|
|
return package_name;
|
|
|
|
|
|
|
|
/* Stop looking if we find a function without a package name.
|
|
|
|
We're most likely outside of Go and thus the concept of the
|
|
|
|
"current" package is gone. */
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
block = BLOCK_SUPERBLOCK (block);
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Table mapping opcodes into strings for printing operators
|
|
|
|
and precedences of the operators.
|
|
|
|
TODO(dje): &^ ? */
|
|
|
|
|
|
|
|
static const struct op_print go_op_print_tab[] =
|
|
|
|
{
|
|
|
|
{",", BINOP_COMMA, PREC_COMMA, 0},
|
|
|
|
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
|
|
|
|
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
|
|
|
|
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
|
|
|
|
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
|
|
|
|
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
|
|
|
|
{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
|
|
|
|
{"==", BINOP_EQUAL, PREC_EQUAL, 0},
|
|
|
|
{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
|
|
|
|
{"<=", BINOP_LEQ, PREC_ORDER, 0},
|
|
|
|
{">=", BINOP_GEQ, PREC_ORDER, 0},
|
|
|
|
{">", BINOP_GTR, PREC_ORDER, 0},
|
|
|
|
{"<", BINOP_LESS, PREC_ORDER, 0},
|
|
|
|
{">>", BINOP_RSH, PREC_SHIFT, 0},
|
|
|
|
{"<<", BINOP_LSH, PREC_SHIFT, 0},
|
|
|
|
{"+", BINOP_ADD, PREC_ADD, 0},
|
|
|
|
{"-", BINOP_SUB, PREC_ADD, 0},
|
|
|
|
{"*", BINOP_MUL, PREC_MUL, 0},
|
|
|
|
{"/", BINOP_DIV, PREC_MUL, 0},
|
|
|
|
{"%", BINOP_REM, PREC_MUL, 0},
|
|
|
|
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
|
|
|
|
{"-", UNOP_NEG, PREC_PREFIX, 0},
|
|
|
|
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
|
|
|
|
{"^", UNOP_COMPLEMENT, PREC_PREFIX, 0},
|
|
|
|
{"*", UNOP_IND, PREC_PREFIX, 0},
|
|
|
|
{"&", UNOP_ADDR, PREC_PREFIX, 0},
|
|
|
|
{"unsafe.Sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
|
|
|
|
{"++", UNOP_POSTINCREMENT, PREC_SUFFIX, 0},
|
|
|
|
{"--", UNOP_POSTDECREMENT, PREC_SUFFIX, 0},
|
|
|
|
{NULL, 0, 0, 0}
|
|
|
|
};
|
|
|
|
|
|
|
|
enum go_primitive_types {
|
|
|
|
go_primitive_type_void,
|
|
|
|
go_primitive_type_char,
|
|
|
|
go_primitive_type_bool,
|
|
|
|
go_primitive_type_int,
|
|
|
|
go_primitive_type_uint,
|
|
|
|
go_primitive_type_uintptr,
|
|
|
|
go_primitive_type_int8,
|
|
|
|
go_primitive_type_int16,
|
|
|
|
go_primitive_type_int32,
|
|
|
|
go_primitive_type_int64,
|
|
|
|
go_primitive_type_uint8,
|
|
|
|
go_primitive_type_uint16,
|
|
|
|
go_primitive_type_uint32,
|
|
|
|
go_primitive_type_uint64,
|
|
|
|
go_primitive_type_float32,
|
|
|
|
go_primitive_type_float64,
|
|
|
|
go_primitive_type_complex64,
|
|
|
|
go_primitive_type_complex128,
|
|
|
|
nr_go_primitive_types
|
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
go_language_arch_info (struct gdbarch *gdbarch,
|
|
|
|
struct language_arch_info *lai)
|
|
|
|
{
|
|
|
|
const struct builtin_go_type *builtin = builtin_go_type (gdbarch);
|
|
|
|
|
|
|
|
lai->string_char_type = builtin->builtin_char;
|
|
|
|
|
|
|
|
lai->primitive_type_vector
|
|
|
|
= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_go_primitive_types + 1,
|
|
|
|
struct type *);
|
|
|
|
|
|
|
|
lai->primitive_type_vector [go_primitive_type_void]
|
|
|
|
= builtin->builtin_void;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_char]
|
|
|
|
= builtin->builtin_char;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_bool]
|
|
|
|
= builtin->builtin_bool;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_int]
|
|
|
|
= builtin->builtin_int;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uint]
|
|
|
|
= builtin->builtin_uint;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uintptr]
|
|
|
|
= builtin->builtin_uintptr;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_int8]
|
|
|
|
= builtin->builtin_int8;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_int16]
|
|
|
|
= builtin->builtin_int16;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_int32]
|
|
|
|
= builtin->builtin_int32;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_int64]
|
|
|
|
= builtin->builtin_int64;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uint8]
|
|
|
|
= builtin->builtin_uint8;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uint16]
|
|
|
|
= builtin->builtin_uint16;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uint32]
|
|
|
|
= builtin->builtin_uint32;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_uint64]
|
|
|
|
= builtin->builtin_uint64;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_float32]
|
|
|
|
= builtin->builtin_float32;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_float64]
|
|
|
|
= builtin->builtin_float64;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_complex64]
|
|
|
|
= builtin->builtin_complex64;
|
|
|
|
lai->primitive_type_vector [go_primitive_type_complex128]
|
|
|
|
= builtin->builtin_complex128;
|
|
|
|
|
|
|
|
lai->bool_type_symbol = "bool";
|
|
|
|
lai->bool_type_default = builtin->builtin_bool;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct language_defn go_language_defn =
|
|
|
|
{
|
|
|
|
"go",
|
2013-10-26 10:00:11 +02:00
|
|
|
"Go",
|
2012-04-25 16:07:23 +02:00
|
|
|
language_go,
|
|
|
|
range_check_off,
|
|
|
|
case_sensitive_on,
|
|
|
|
array_row_major,
|
|
|
|
macro_expansion_no,
|
|
|
|
&exp_descriptor_c,
|
|
|
|
go_parse,
|
|
|
|
go_error,
|
|
|
|
null_post_parser,
|
|
|
|
c_printchar, /* Print a character constant. */
|
|
|
|
c_printstr, /* Function to print string constant. */
|
|
|
|
c_emit_char, /* Print a single char. */
|
|
|
|
go_print_type, /* Print a type using appropriate syntax. */
|
|
|
|
c_print_typedef, /* Print a typedef using appropriate
|
|
|
|
syntax. */
|
|
|
|
go_val_print, /* Print a value using appropriate syntax. */
|
|
|
|
c_value_print, /* Print a top-level value. */
|
|
|
|
default_read_var_value, /* la_read_var_value */
|
|
|
|
NULL, /* Language specific skip_trampoline. */
|
|
|
|
NULL, /* name_of_this */
|
|
|
|
basic_lookup_symbol_nonlocal,
|
|
|
|
basic_lookup_transparent_type,
|
|
|
|
go_demangle, /* Language specific symbol demangler. */
|
|
|
|
NULL, /* Language specific
|
|
|
|
class_name_from_physname. */
|
|
|
|
go_op_print_tab, /* Expression operators for printing. */
|
|
|
|
1, /* C-style arrays. */
|
|
|
|
0, /* String lower bound. */
|
|
|
|
default_word_break_characters,
|
|
|
|
default_make_symbol_completion_list,
|
|
|
|
go_language_arch_info,
|
|
|
|
default_print_array_index,
|
|
|
|
default_pass_by_reference,
|
|
|
|
c_get_string,
|
|
|
|
NULL,
|
|
|
|
iterate_over_symbols,
|
2013-10-17 15:15:21 +02:00
|
|
|
&default_varobj_ops,
|
the "compile" command
This final patch adds the new "compile" command and subcommands, and
all the machinery needed to make it work.
A shared library supplied by gcc is used for all communications with
gcc. Types and most aspects of symbols are provided directly by gdb
to the compiler using this library.
gdb provides some information about the user's code using plain text.
Macros are emitted this way, and DWARF location expressions (and
bounds for VLA) are compiled to C code.
This hybrid approach was taken because, on the one hand, it is better
to provide global declarations and such on demand; but on the other
hand, for local variables, translating DWARF location expressions to C
was much simpler than exporting a full compiler API to gdb -- the same
result, only easier to implement, understand, and debug.
In the ordinary mode, the user's expression is wrapped in a dummy
function. After compilation, gdb inserts the resulting object code
into the inferior, then calls this function.
Access to local variables is provided by noting which registers are
used by location expressions, and passing a structure of register
values into the function. Writes to registers are supported by
copying out these values after the function returns.
This approach was taken so that we could eventually implement other
more interesting features based on this same infrastructure; for
example, we're planning to investigate inferior-side breakpoint
conditions.
gdb/ChangeLog
2014-12-12 Phil Muldoon <pmuldoon@redhat.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
Tom Tromey <tromey@redhat.com>
* NEWS: Update.
* symtab.h (struct symbol_computed_ops) <generate_c_location>: New
field.
* p-lang.c (pascal_language_defn): Update.
* opencl-lang.c (opencl_language_defn): Update.
* objc-lang.c (objc_language_defn): Update.
* m2-lang.c (m2_language_defn): Update.
* language.h (struct language_defn) <la_get_compile_instance,
la_compute_program>: New fields.
* language.c (unknown_language_defn, auto_language_defn)
(local_language_defn): Update.
* jv-lang.c (java_language_defn): Update.
* go-lang.c (go_language_defn): Update.
* f-lang.c (f_language_defn): Update.
* dwarf2loc.h (dwarf2_compile_property_to_c): Declare.
* dwarf2loc.c (dwarf2_compile_property_to_c)
(locexpr_generate_c_location, loclist_generate_c_location): New
functions.
(dwarf2_locexpr_funcs, dwarf2_loclist_funcs): Update.
* defs.h (enum compile_i_scope_types): New.
(enum command_control_type) <compile_control>: New constant.
(struct command_line) <control_u>: New field.
* d-lang.c (d_language_defn): Update.
* compile/compile.c: New file.
* compile/compile-c-support.c: New file.
* compile/compile-c-symbols.c: New file.
* compile/compile-c-types.c: New file.
* compile/compile.h: New file.
* compile/compile-internal.h: New file.
* compile/compile-loc2c.c: New file.
* compile/compile-object-load.c: New file.
* compile/compile-object-load.h: New file.
* compile/compile-object-run.c: New file.
* compile/compile-object-run.h: New file.
* cli/cli-script.c (multi_line_command_p, print_command_lines)
(execute_control_command, process_next_line)
(recurse_read_control_structure): Handle compile_control.
* c-lang.h (c_get_compile_context, c_compute_program): Declare.
* c-lang.c (c_language_defn, cplus_language_defn)
(asm_language_defn, minimal_language_defn): Update.
* ada-lang.c (ada_language_defn): Update.
* Makefile.in (SUBDIR_GCC_COMPILE_OBS, SUBDIR_GCC_COMPILE_SRCS):
New variables.
(SFILES): Add SUBDIR_GCC_COMPILE_SRCS.
(HFILES_NO_SRCDIR): Add compile.h.
(COMMON_OBS): Add SUBDIR_GCC_COMPILE_OBS.
(INIT_FILES): Add SUBDIR_GCC_COMPILE_SRCS.
(compile.o, compile-c-types.o, compile-c-symbols.o)
(compile-object-load.o, compile-object-run.o, compile-loc2c.o)
(compile-c-support.o): New targets.
gdb/doc/ChangeLog
2014-12-12 Phil Muldoon <pmuldoon@redhat.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.texinfo (Altering): Update.
(Compiling and Injecting Code): New node.
gdb/testsuite/ChangeLog
2014-12-12 Phil Muldoon <pmuldoon@redhat.com>
Jan Kratochvil <jan.kratochvil@redhat.com>
Tom Tromey <tromey@redhat.com>
* configure.ac: Add gdb.compile/.
* configure: Regenerate.
* gdb.compile/Makefile.in: New file.
* gdb.compile/compile-ops.exp: New file.
* gdb.compile/compile-ops.c: New file.
* gdb.compile/compile-tls.c: New file.
* gdb.compile/compile-tls.exp: New file.
* gdb.compile/compile-constvar.S: New file.
* gdb.compile/compile-constvar.c: New file.
* gdb.compile/compile-mod.c: New file.
* gdb.compile/compile-nodebug.c: New file.
* gdb.compile/compile-setjmp-mod.c: New file.
* gdb.compile/compile-setjmp.c: New file.
* gdb.compile/compile-setjmp.exp: New file.
* gdb.compile/compile-shlib.c: New file.
* gdb.compile/compile.c: New file.
* gdb.compile/compile.exp: New file.
* lib/gdb.exp (skip_compile_feature_tests): New proc.
2014-05-14 22:35:45 +02:00
|
|
|
NULL,
|
|
|
|
NULL,
|
2012-04-25 16:07:23 +02:00
|
|
|
LANG_MAGIC
|
|
|
|
};
|
|
|
|
|
|
|
|
static void *
|
|
|
|
build_go_types (struct gdbarch *gdbarch)
|
|
|
|
{
|
|
|
|
struct builtin_go_type *builtin_go_type
|
|
|
|
= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_go_type);
|
|
|
|
|
|
|
|
builtin_go_type->builtin_void
|
|
|
|
= arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
|
|
|
|
builtin_go_type->builtin_char
|
|
|
|
= arch_character_type (gdbarch, 8, 1, "char");
|
|
|
|
builtin_go_type->builtin_bool
|
|
|
|
= arch_boolean_type (gdbarch, 8, 0, "bool");
|
|
|
|
builtin_go_type->builtin_int
|
|
|
|
= arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "int");
|
|
|
|
builtin_go_type->builtin_uint
|
|
|
|
= arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "uint");
|
|
|
|
builtin_go_type->builtin_uintptr
|
|
|
|
= arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 1, "uintptr");
|
|
|
|
builtin_go_type->builtin_int8
|
|
|
|
= arch_integer_type (gdbarch, 8, 0, "int8");
|
|
|
|
builtin_go_type->builtin_int16
|
|
|
|
= arch_integer_type (gdbarch, 16, 0, "int16");
|
|
|
|
builtin_go_type->builtin_int32
|
|
|
|
= arch_integer_type (gdbarch, 32, 0, "int32");
|
|
|
|
builtin_go_type->builtin_int64
|
|
|
|
= arch_integer_type (gdbarch, 64, 0, "int64");
|
|
|
|
builtin_go_type->builtin_uint8
|
|
|
|
= arch_integer_type (gdbarch, 8, 1, "uint8");
|
|
|
|
builtin_go_type->builtin_uint16
|
|
|
|
= arch_integer_type (gdbarch, 16, 1, "uint16");
|
|
|
|
builtin_go_type->builtin_uint32
|
|
|
|
= arch_integer_type (gdbarch, 32, 1, "uint32");
|
|
|
|
builtin_go_type->builtin_uint64
|
|
|
|
= arch_integer_type (gdbarch, 64, 1, "uint64");
|
|
|
|
builtin_go_type->builtin_float32
|
|
|
|
= arch_float_type (gdbarch, 32, "float32", NULL);
|
|
|
|
builtin_go_type->builtin_float64
|
|
|
|
= arch_float_type (gdbarch, 64, "float64", NULL);
|
|
|
|
builtin_go_type->builtin_complex64
|
|
|
|
= arch_complex_type (gdbarch, "complex64",
|
|
|
|
builtin_go_type->builtin_float32);
|
|
|
|
builtin_go_type->builtin_complex128
|
|
|
|
= arch_complex_type (gdbarch, "complex128",
|
|
|
|
builtin_go_type->builtin_float64);
|
|
|
|
|
|
|
|
return builtin_go_type;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct gdbarch_data *go_type_data;
|
|
|
|
|
|
|
|
const struct builtin_go_type *
|
|
|
|
builtin_go_type (struct gdbarch *gdbarch)
|
|
|
|
{
|
|
|
|
return gdbarch_data (gdbarch, go_type_data);
|
|
|
|
}
|
|
|
|
|
|
|
|
extern initialize_file_ftype _initialize_go_language;
|
|
|
|
|
|
|
|
void
|
|
|
|
_initialize_go_language (void)
|
|
|
|
{
|
|
|
|
go_type_data = gdbarch_data_register_post_init (build_go_types);
|
|
|
|
|
|
|
|
add_language (&go_language_defn);
|
|
|
|
}
|