[base] 2007-10-16 Jan Kratochvil Port to GDB-6.7. Index: gdb-6.7/gdb/Makefile.in =================================================================== --- gdb-6.7.orig/gdb/Makefile.in 2007-10-16 16:19:18.000000000 +0200 +++ gdb-6.7/gdb/Makefile.in 2007-10-16 16:42:34.000000000 +0200 @@ -1932,7 +1932,8 @@ corelow.o: corelow.c $(defs_h) $(arch_ut $(inferior_h) $(symtab_h) $(command_h) $(bfd_h) $(target_h) \ $(gdbcore_h) $(gdbthread_h) $(regcache_h) $(regset_h) $(symfile_h) \ $(exec_h) $(readline_h) $(gdb_assert_h) \ - $(exceptions_h) $(solib_h) + $(exceptions_h) $(solib_h) $(auxv_h) $(elf_common_h) $(objfiles_h) \ + $(gdbcmd_h) core-regset.o: core-regset.c $(defs_h) $(command_h) $(gdbcore_h) \ $(inferior_h) $(target_h) $(regcache_h) $(gdb_string_h) $(gregset_h) cp-abi.o: cp-abi.c $(defs_h) $(value_h) $(cp_abi_h) $(command_h) $(gdbcmd_h) \ @@ -2769,7 +2770,8 @@ symfile.o: symfile.c $(defs_h) $(bfdlink $(gdb_stabs_h) $(gdb_obstack_h) $(completer_h) $(bcache_h) \ $(hashtab_h) $(readline_h) $(gdb_assert_h) $(block_h) \ $(gdb_string_h) $(gdb_stat_h) $(observer_h) $(exec_h) \ - $(parser_defs_h) $(varobj_h) $(elf_bfd_h) + $(parser_defs_h) $(varobj_h) $(elf_bfd_h) $(gdb_stdint_h) $(libbfd_h) \ + $(elf_bfd_h) $(elf_external_h) symfile-mem.o: symfile-mem.c $(defs_h) $(symtab_h) $(gdbcore_h) \ $(objfiles_h) $(exceptions_h) $(gdbcmd_h) $(target_h) $(value_h) \ $(symfile_h) $(observer_h) $(auxv_h) $(elf_common_h) Index: gdb-6.7/gdb/corelow.c =================================================================== --- gdb-6.7.orig/gdb/corelow.c 2007-09-04 01:06:35.000000000 +0200 +++ gdb-6.7/gdb/corelow.c 2007-10-16 16:41:50.000000000 +0200 @@ -44,6 +44,10 @@ #include "gdb_assert.h" #include "exceptions.h" #include "solib.h" +#include "auxv.h" +#include "elf/common.h" +#include "objfiles.h" +#include "gdbcmd.h" #ifndef O_LARGEFILE @@ -251,6 +255,66 @@ add_to_thread_list (bfd *abfd, asection inferior_ptid = pid_to_ptid (thread_id); /* Yes, make it current */ } +static int build_id_core_loads = 1; +static void +show_build_id_core_loads (struct ui_file *file, int from_tty, + struct cmd_list_element *c, const char *value) +{ + fprintf_filtered (file, _("Automatic loading of the matching binaries " + "for core files is %s.\n"), value); +} + +static void +build_id_locate_exec (int from_tty) +{ + CORE_ADDR at_entry; + struct build_id *build_id; + char *exec_filename, *debug_filename; + char *build_id_filename; + + if (exec_bfd != NULL) + return; + + if (target_auxv_search (¤t_target, AT_ENTRY, &at_entry) <= 0) + return; + + build_id = build_id_addr_get (at_entry); + if (build_id == NULL) + return; + + exec_filename = build_id_to_filename (build_id, &build_id_filename, 0); + if (exec_filename != NULL) + exec_file_attach (exec_filename, from_tty); + else + fprintf_unfiltered (gdb_stdlog, + _("\nwarning: Missing the matching executable file: %s\n"), + build_id_filename); + xfree (build_id_filename); + + /* `.note.gnu.build-id' section exists even for files without a separate + debuginfo. */ + debug_filename = build_id_to_filename (build_id, &build_id_filename, 1); + if (debug_filename != NULL) + { + symbol_file_add_main (debug_filename, from_tty); + xfree (debug_filename); + } + else + { + if (exec_filename != NULL) + symbol_file_add_main (exec_filename, from_tty); + if (symfile_objfile == NULL) + fprintf_unfiltered (gdb_stdlog, + _("\nwarning: Missing the matching executable's debug info file: %s\n"), + build_id_filename); + } + xfree (build_id_filename); + + xfree (exec_filename); + + /* No automatic SOLIB_ADD as the libraries would get read twice. */ +} + /* This routine opens and sets up the core file bfd. */ static void @@ -347,6 +411,15 @@ core_open (char *filename, int from_tty) ontop = !push_target (&core_ops); discard_cleanups (old_chain); + if (ontop) + { + /* Find the build_id identifiers. If it gets executed after + POST_CREATE_INFERIOR we would clash with asking to discard the already + loaded VDSO symbols. */ + if (build_id_core_loads != 0) + build_id_locate_exec (from_tty); + } + /* This is done first, before anything has a chance to query the inferior for information such as symbols. */ post_create_inferior (&core_ops, from_tty); @@ -678,4 +751,13 @@ _initialize_corelow (void) if (!coreops_suppress_target) add_target (&core_ops); + + add_setshow_zinteger_cmd ("build-id-core-loads", class_files, + &build_id_core_loads, _("\ +Set debugging of the build-id locator."), _("\ +Show debugging of the build-id locator."), _("\ +Enables printf debugging output."), + NULL, + show_build_id_core_loads, + &setlist, &showlist); } Index: gdb-6.7/gdb/solib-svr4.c =================================================================== --- gdb-6.7.orig/gdb/solib-svr4.c 2007-10-16 15:43:56.000000000 +0200 +++ gdb-6.7/gdb/solib-svr4.c 2007-10-16 16:44:44.000000000 +0200 @@ -957,9 +957,35 @@ svr4_current_sos (void) free_so (new); else { - strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1); - new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; - strcpy (new->so_original_name, new->so_name); + struct build_id *build_id; + + strncpy (new->so_original_name, buffer, SO_NAME_MAX_PATH_SIZE - 1); + new->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; + /* May get overwritten below. */ + strcpy (new->so_name, new->so_original_name); + + build_id = build_id_addr_get (LM_DYNAMIC_FROM_LINK_MAP (new)); + if (build_id != NULL) + { + char *name, *build_id_filename; + + /* Missing the build-id matching separate debug info file + would be handled while SO_NAME gets loaded. */ + name = build_id_to_filename (build_id, &build_id_filename, 0); + if (name != NULL) + { + strncpy (new->so_name, name, SO_NAME_MAX_PATH_SIZE - 1); + new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; + xfree (name); + } + else + fprintf_unfiltered (gdb_stdlog, + _("\nwarning: Missing the matching library file: %s\n"), + build_id_filename); + xfree (build_id_filename); + xfree (build_id); + } + if (debug_solib) { fprintf_unfiltered (gdb_stdlog, Index: gdb-6.7/gdb/symfile.c =================================================================== --- gdb-6.7.orig/gdb/symfile.c 2007-10-15 21:42:26.000000000 +0200 +++ gdb-6.7/gdb/symfile.c 2007-10-16 16:46:30.000000000 +0200 @@ -53,6 +53,9 @@ #include "parser-defs.h" #include "varobj.h" #include "elf-bfd.h" +#include "gdb_stdint.h" +#include "libbfd.h" +#include "elf/external.h" #include #include @@ -61,6 +64,7 @@ #include #include #include +#include int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num); @@ -1238,16 +1242,62 @@ symbol_file_clear (int from_tty) printf_unfiltered (_("No symbol file now.\n")); } +/* Locate NT_GNU_BUILD_ID and return its matching debug filename. + FIXME: NOTE decoding should be unified with the BFD core notes decoding. */ + +static int build_id_debug; +static void +show_build_id_debug (struct ui_file *file, int from_tty, + struct cmd_list_element *c, const char *value) +{ + fprintf_filtered (file, _("Debugging of the build-id locator is %s.\n"), + value); +} + struct build_id { size_t size; gdb_byte data[1]; }; -/* Locate NT_GNU_BUILD_ID from ABFD and return its content. */ +struct build_id * +build_id_buf_get (bfd *templ, gdb_byte *buf, bfd_size_type size) +{ + bfd_byte *p; + + p = buf; + while (p < buf + size) + { + /* FIXME: bad alignment assumption. */ + Elf_External_Note *xnp = (Elf_External_Note *) p; + size_t namesz = H_GET_32 (templ, xnp->namesz); + size_t descsz = H_GET_32 (templ, xnp->descsz); + bfd_byte *descdata = xnp->name + BFD_ALIGN (namesz, 4); + + if (H_GET_32 (templ, xnp->type) == NT_GNU_BUILD_ID + && namesz == sizeof "GNU" + && memcmp (xnp->name, "GNU", sizeof "GNU") == 0) + { + size_t size = descsz; + gdb_byte *data = (void *) descdata; + struct build_id *retval; + + retval = xmalloc (sizeof *retval - 1 + size); + retval->size = size; + memcpy (retval->data, data, size); + + return retval; + } + p = descdata + BFD_ALIGN (descsz, 4); + } + return NULL; +} + +/* Separate debuginfo files have corrupted PHDR but SHDR is correct there. + Locate NT_GNU_BUILD_ID from ABFD and return its content. */ static struct build_id * -build_id_bfd_get (bfd *abfd) +build_id_bfd_shdr_get (bfd *abfd) { struct build_id *retval; @@ -1263,6 +1313,348 @@ build_id_bfd_get (bfd *abfd) return retval; } +/* Core files may have missing (corrupt) SHDR but PDHR is correct there. + bfd_elf_bfd_from_remote_memory () has too much overhead by + allocating/reading all the available ELF PT_LOADs. */ + +static struct build_id * +build_id_phdr_get (bfd *templ, bfd_vma loadbase, unsigned e_phnum, + Elf_Internal_Phdr *i_phdr) +{ + int i; + struct build_id *retval = NULL; + + for (i = 0; i < e_phnum; i++) + if (i_phdr[i].p_type == PT_NOTE && i_phdr[i].p_filesz > 0) + { + Elf_Internal_Phdr *hdr = &i_phdr[i]; + gdb_byte *buf; + int err; + + buf = xmalloc (hdr->p_filesz); + err = target_read_memory (loadbase + i_phdr[i].p_vaddr, buf, + hdr->p_filesz); + if (err == 0) + retval = build_id_buf_get (templ, buf, hdr->p_filesz); + else + retval = NULL; + xfree (buf); + if (retval != NULL) + break; + } + return retval; +} + +/* First we validate the file by reading in the ELF header and checking + the magic number. */ + +static inline bfd_boolean +elf_file_p (Elf64_External_Ehdr *x_ehdrp64) +{ + gdb_assert (sizeof (Elf64_External_Ehdr) >= sizeof (Elf32_External_Ehdr)); + gdb_assert (offsetof (Elf64_External_Ehdr, e_ident) + == offsetof (Elf32_External_Ehdr, e_ident)); + gdb_assert (sizeof (((Elf64_External_Ehdr *) 0)->e_ident) + == sizeof (((Elf32_External_Ehdr *) 0)->e_ident)); + + return ((x_ehdrp64->e_ident[EI_MAG0] == ELFMAG0) + && (x_ehdrp64->e_ident[EI_MAG1] == ELFMAG1) + && (x_ehdrp64->e_ident[EI_MAG2] == ELFMAG2) + && (x_ehdrp64->e_ident[EI_MAG3] == ELFMAG3)); +} + +/* Translate an ELF file header in external format into an ELF file header in + internal format. */ + +#define H_GET_WORD(bfd, ptr) (is64 ? H_GET_64 (bfd, (ptr)) \ + : H_GET_32 (bfd, (ptr))) +#define H_GET_SIGNED_WORD(bfd, ptr) (is64 ? H_GET_S64 (bfd, (ptr)) \ + : H_GET_S32 (bfd, (ptr))) + +static void +elf_swap_ehdr_in (bfd *abfd, + const Elf64_External_Ehdr *src64, + Elf_Internal_Ehdr *dst) +{ + int is64 = bfd_get_arch_size (abfd) == 64; +#define SRC(field) (is64 ? src64->field \ + : ((const Elf32_External_Ehdr *) src64)->field) + + int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; + memcpy (dst->e_ident, SRC (e_ident), EI_NIDENT); + dst->e_type = H_GET_16 (abfd, SRC (e_type)); + dst->e_machine = H_GET_16 (abfd, SRC (e_machine)); + dst->e_version = H_GET_32 (abfd, SRC (e_version)); + if (signed_vma) + dst->e_entry = H_GET_SIGNED_WORD (abfd, SRC (e_entry)); + else + dst->e_entry = H_GET_WORD (abfd, SRC (e_entry)); + dst->e_phoff = H_GET_WORD (abfd, SRC (e_phoff)); + dst->e_shoff = H_GET_WORD (abfd, SRC (e_shoff)); + dst->e_flags = H_GET_32 (abfd, SRC (e_flags)); + dst->e_ehsize = H_GET_16 (abfd, SRC (e_ehsize)); + dst->e_phentsize = H_GET_16 (abfd, SRC (e_phentsize)); + dst->e_phnum = H_GET_16 (abfd, SRC (e_phnum)); + dst->e_shentsize = H_GET_16 (abfd, SRC (e_shentsize)); + dst->e_shnum = H_GET_16 (abfd, SRC (e_shnum)); + dst->e_shstrndx = H_GET_16 (abfd, SRC (e_shstrndx)); + +#undef SRC +} + +/* Translate an ELF program header table entry in external format into an + ELF program header table entry in internal format. */ + +void +elf_swap_phdr_in (bfd *abfd, + const Elf64_External_Phdr *src64, + Elf_Internal_Phdr *dst) +{ + int is64 = bfd_get_arch_size (abfd) == 64; +#define SRC(field) (is64 ? src64->field \ + : ((const Elf32_External_Phdr *) src64)->field) + + int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma; + + dst->p_type = H_GET_32 (abfd, SRC (p_type)); + dst->p_flags = H_GET_32 (abfd, SRC (p_flags)); + dst->p_offset = H_GET_WORD (abfd, SRC (p_offset)); + if (signed_vma) + { + dst->p_vaddr = H_GET_SIGNED_WORD (abfd, SRC (p_vaddr)); + dst->p_paddr = H_GET_SIGNED_WORD (abfd, SRC (p_paddr)); + } + else + { + dst->p_vaddr = H_GET_WORD (abfd, SRC (p_vaddr)); + dst->p_paddr = H_GET_WORD (abfd, SRC (p_paddr)); + } + dst->p_filesz = H_GET_WORD (abfd, SRC (p_filesz)); + dst->p_memsz = H_GET_WORD (abfd, SRC (p_memsz)); + dst->p_align = H_GET_WORD (abfd, SRC (p_align)); + +#undef SRC +} + +#undef H_GET_SIGNED_WORD +#undef H_GET_WORD + +static Elf_Internal_Phdr * +elf_get_phdr (bfd *templ, bfd_vma ehdr_vma, unsigned *e_phnum_pointer, + bfd_vma *loadbase_pointer) +{ + /* sizeof (Elf64_External_Ehdr) >= sizeof (Elf32_External_Ehdr) */ + Elf64_External_Ehdr x_ehdr64; /* Elf file header, external form */ + Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */ + bfd_size_type x_phdrs_size; + gdb_byte *x_phdrs_ptr; + Elf_Internal_Phdr *i_phdrs; + int err; + unsigned int i; + bfd_vma loadbase; + int loadbase_set; + + gdb_assert (templ != NULL); + gdb_assert (sizeof (Elf64_External_Ehdr) >= sizeof (Elf32_External_Ehdr)); + + /* Read in the ELF header in external format. */ + err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr64, sizeof x_ehdr64); + if (err) + { + if (build_id_debug) + warning (_("build-id: Error reading ELF header at address 0x%lx"), + (unsigned long) ehdr_vma); + return NULL; + } + + /* Now check to see if we have a valid ELF file, and one that BFD can + make use of. The magic number must match, the address size ('class') + and byte-swapping must match our XVEC entry. */ + + if (! elf_file_p (&x_ehdr64) + || x_ehdr64.e_ident[EI_VERSION] != EV_CURRENT + || !((bfd_get_arch_size (templ) == 64 + && x_ehdr64.e_ident[EI_CLASS] == ELFCLASS64) + || (bfd_get_arch_size (templ) == 32 + && x_ehdr64.e_ident[EI_CLASS] == ELFCLASS32))) + { + if (build_id_debug) + warning (_("build-id: Unrecognized ELF header at address 0x%lx"), + (unsigned long) ehdr_vma); + return NULL; + } + + /* Check that file's byte order matches xvec's */ + switch (x_ehdr64.e_ident[EI_DATA]) + { + case ELFDATA2MSB: /* Big-endian */ + if (! bfd_header_big_endian (templ)) + { + if (build_id_debug) + warning (_("build-id: Unrecognized " + "big-endian ELF header at address 0x%lx"), + (unsigned long) ehdr_vma); + return NULL; + } + break; + case ELFDATA2LSB: /* Little-endian */ + if (! bfd_header_little_endian (templ)) + { + if (build_id_debug) + warning (_("build-id: Unrecognized " + "little-endian ELF header at address 0x%lx"), + (unsigned long) ehdr_vma); + return NULL; + } + break; + case ELFDATANONE: /* No data encoding specified */ + default: /* Unknown data encoding specified */ + if (build_id_debug) + warning (_("build-id: Unrecognized " + "ELF header endianity at address 0x%lx"), + (unsigned long) ehdr_vma); + return NULL; + } + + elf_swap_ehdr_in (templ, &x_ehdr64, &i_ehdr); + + /* The file header tells where to find the program headers. + These are what we use to actually choose what to read. */ + + if (i_ehdr.e_phentsize != (bfd_get_arch_size (templ) == 64 + ? sizeof (Elf64_External_Phdr) + : sizeof (Elf32_External_Phdr)) + || i_ehdr.e_phnum == 0) + { + if (build_id_debug) + warning (_("build-id: Invalid ELF program headers from the ELF header " + "at address 0x%lx"), (unsigned long) ehdr_vma); + return NULL; + } + + x_phdrs_size = (bfd_get_arch_size (templ) == 64 ? sizeof (Elf64_External_Phdr) + : sizeof (Elf32_External_Phdr)); + + i_phdrs = xmalloc (i_ehdr.e_phnum * (sizeof *i_phdrs + x_phdrs_size)); + x_phdrs_ptr = (void *) &i_phdrs[i_ehdr.e_phnum]; + err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs_ptr, + i_ehdr.e_phnum * x_phdrs_size); + if (err) + { + free (i_phdrs); + if (build_id_debug) + warning (_("build-id: Error reading " + "ELF program headers at address 0x%lx"), + (unsigned long) (ehdr_vma + i_ehdr.e_phoff)); + return NULL; + } + + loadbase = ehdr_vma; + loadbase_set = 0; + for (i = 0; i < i_ehdr.e_phnum; ++i) + { + elf_swap_phdr_in (templ, (Elf64_External_Phdr *) + (x_phdrs_ptr + i * x_phdrs_size), &i_phdrs[i]); + /* IA-64 vDSO may have two mappings for one segment, where one mapping + is executable only, and one is read only. We must not use the + executable one (PF_R is the first one, PF_X the second one). */ + if (i_phdrs[i].p_type == PT_LOAD && (i_phdrs[i].p_flags & PF_R)) + { + /* Only the first PT_LOAD segment indicates the file bias. + Next segments may have P_VADDR arbitrarily higher. + If the first segment has P_VADDR zero any next segment must not + confuse us, the first one sets LOADBASE certainly enough. */ + if (!loadbase_set && i_phdrs[i].p_offset == 0) + { + loadbase = ehdr_vma - i_phdrs[i].p_vaddr; + loadbase_set = 1; + } + } + } + + if (build_id_debug) + warning (_("build-id: Found ELF header at address 0x%lx, loadbase 0x%lx"), + (unsigned long) ehdr_vma, (unsigned long) loadbase); + + *e_phnum_pointer = i_ehdr.e_phnum; + *loadbase_pointer = loadbase; + return i_phdrs; +} + +/* BUILD_ID_ADDR_GET gets ADDR located somewhere in the object. + Find the first section before ADDR containing an ELF header. + We rely on the fact the sections from multiple files do not mix. + FIXME: We should check ADDR is contained _inside_ the section with possibly + missing content (P_FILESZ < P_MEMSZ). These omitted sections are currently + hidden by _BFD_ELF_MAKE_SECTION_FROM_PHDR. */ + +static CORE_ADDR build_id_addr; +struct build_id_addr_sect + { + struct build_id_addr_sect *next; + asection *sect; + }; +static struct build_id_addr_sect *build_id_addr_sect; + +static void build_id_addr_candidate (bfd *abfd, asection *sect, void *obj) +{ + if (build_id_addr >= bfd_section_vma (abfd, sect)) + { + struct build_id_addr_sect *candidate; + + candidate = xmalloc (sizeof *candidate); + candidate->next = build_id_addr_sect; + build_id_addr_sect = candidate; + candidate->sect = sect; + } +} + +struct build_id * +build_id_addr_get (CORE_ADDR addr) +{ + struct build_id_addr_sect *candidate; + struct build_id *retval = NULL; + Elf_Internal_Phdr *i_phdr = NULL; + bfd_vma loadbase = 0; + unsigned e_phnum = 0; + + if (core_bfd == NULL) + return NULL; + + build_id_addr = addr; + gdb_assert (build_id_addr_sect == NULL); + bfd_map_over_sections (core_bfd, build_id_addr_candidate, NULL); + + /* Sections are sorted in the high-to-low VMAs order. + Stop the search on the first ELF header we find. + Do not continue the search even if it does not contain NT_GNU_BUILD_ID. */ + + for (candidate = build_id_addr_sect; candidate != NULL; + candidate = candidate->next) + { + i_phdr = elf_get_phdr (core_bfd, + bfd_section_vma (core_bfd, candidate->sect), + &e_phnum, &loadbase); + if (i_phdr != NULL) + break; + } + + if (i_phdr != NULL) + { + retval = build_id_phdr_get (core_bfd, loadbase, e_phnum, i_phdr); + xfree (i_phdr); + } + + while (build_id_addr_sect != NULL) + { + candidate = build_id_addr_sect; + build_id_addr_sect = candidate->next; + xfree (candidate); + } + + return retval; +} + /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */ static int @@ -1277,7 +1669,7 @@ build_id_verify (const char *filename, s if (abfd == NULL) return 0; - found = build_id_bfd_get (abfd); + found = build_id_bfd_shdr_get (abfd); if (found == NULL) warning (_("File \"%s\" has no build-id, file skipped"), filename); @@ -1293,8 +1685,9 @@ build_id_verify (const char *filename, s return retval; } -static char * -build_id_to_debug_filename (struct build_id *build_id) +char * +build_id_to_filename (struct build_id *build_id, char **link_return, + int add_debug_suffix) { char *link, *s, *retval = NULL; gdb_byte *data = build_id->data; @@ -1302,7 +1695,9 @@ build_id_to_debug_filename (struct build /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */ link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1 - + 2 * size + (sizeof ".debug" - 1) + 1); + + 2 * size + + (add_debug_suffix ? sizeof ".debug" - 1 : 0) + + 1); s = link + sprintf (link, "%s/.build-id/", debug_file_directory); if (size > 0) { @@ -1313,12 +1708,14 @@ build_id_to_debug_filename (struct build *s++ = '/'; while (size-- > 0) s += sprintf (s, "%02x", (unsigned) *data++); - strcpy (s, ".debug"); + if (add_debug_suffix) + strcpy (s, ".debug"); + else + *s = 0; /* lrealpath() is expensive even for the usually non-existent files. */ if (access (link, F_OK) == 0) retval = lrealpath (link); - xfree (link); if (retval != NULL && !build_id_verify (retval, build_id)) { @@ -1326,6 +1723,11 @@ build_id_to_debug_filename (struct build retval = NULL; } + if (link_return != NULL) + *link_return = link; + else + xfree (link); + return retval; } @@ -1423,23 +1825,27 @@ find_separate_debug_file (struct objfile unsigned long crc32; int i; struct build_id *build_id; + char *build_id_filename = NULL; - build_id = build_id_bfd_get (objfile->obfd); + build_id = build_id_bfd_shdr_get (objfile->obfd); if (build_id != NULL) { char *build_id_name; - build_id_name = build_id_to_debug_filename (build_id); - free (build_id); + build_id_name = build_id_to_filename (build_id, &build_id_filename, 1); + xfree (build_id); /* Prevent looping on a stripped .debug file. */ if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0) { - warning (_("\"%s\": separate debug info file has no debug info"), + warning (_("\"%s\": The separate debug info file has no debug info"), build_id_name); xfree (build_id_name); } else if (build_id_name != NULL) - return build_id_name; + { + xfree (build_id_filename); + return build_id_name; + } } basename = get_debug_link_info (objfile, &crc32); @@ -1447,7 +1853,10 @@ find_separate_debug_file (struct objfile if (basename == NULL) /* There's no separate debug info, hence there's no way we could load it => no warning. */ - return NULL; + { + xfree (build_id_filename); + return NULL; + } dir = xstrdup (objfile->name); @@ -1476,6 +1885,7 @@ find_separate_debug_file (struct objfile if (separate_debug_file_exists (debugfile, crc32, objfile->name)) { + xfree (build_id_filename); xfree (basename); xfree (dir); return xstrdup (debugfile); @@ -1489,6 +1899,7 @@ find_separate_debug_file (struct objfile if (separate_debug_file_exists (debugfile, crc32, objfile->name)) { + xfree (build_id_filename); xfree (basename); xfree (dir); return xstrdup (debugfile); @@ -1502,6 +1913,7 @@ find_separate_debug_file (struct objfile if (separate_debug_file_exists (debugfile, crc32, objfile->name)) { + xfree (build_id_filename); xfree (basename); xfree (dir); return xstrdup (debugfile); @@ -1521,6 +1933,7 @@ find_separate_debug_file (struct objfile if (separate_debug_file_exists (debugfile, crc32, objfile->name)) { + xfree (build_id_filename); xfree (canon_name); xfree (basename); xfree (dir); @@ -1528,6 +1941,14 @@ find_separate_debug_file (struct objfile } } + if (build_id_filename != NULL) + { + fprintf_unfiltered (gdb_stdlog, + _("\nwarning: Missing the separate debug info file: %s\n"), + build_id_filename); + xfree (build_id_filename); + } + if (canon_name) xfree (canon_name); @@ -4223,4 +4644,12 @@ the global debug-file directory prepende NULL, show_debug_file_directory, &setlist, &showlist); + + add_setshow_zinteger_cmd ("build-id", no_class, &build_id_debug, _("\ +Set debugging of the build-id locator."), _("\ +Show debugging of the build-id locator."), _("\ +Enables printf debugging output."), + NULL, + show_build_id_debug, + &setdebuglist, &showdebuglist); } Index: gdb-6.7/gdb/symfile.h =================================================================== --- gdb-6.7.orig/gdb/symfile.h 2007-09-24 23:48:05.000000000 +0200 +++ gdb-6.7/gdb/symfile.h 2007-10-16 16:41:50.000000000 +0200 @@ -353,6 +353,12 @@ extern int symfile_map_offsets_to_segmen struct symfile_segment_data *get_symfile_segment_data (bfd *abfd); void free_symfile_segment_data (struct symfile_segment_data *data); +/* build-id support. */ +struct build_id; +extern struct build_id *build_id_addr_get (CORE_ADDR addr); +extern char *build_id_to_filename (struct build_id *build_id, + char **link_return, int add_debug_suffix); + /* From dwarf2read.c */ extern int dwarf2_has_info (struct objfile *);