[base] 2007-10-16 Jan Kratochvil Port to GDB-6.7. 2008-01-22 Jan Kratochvil option "build-id-core-loads": Fix it to be an "on"/"off" type. More intuitive build-id missing files messages. Lookup also the main executable from the rpm database. Suppress duplicite buil-id missing files warnings. 2008-01-26 Jan Kratochvil Print the shared libraries names unconditionally. 2008-02-21 Jan Kratochvil Rename `debug build-id' to `build-id-verbose'. Provide its level 0 to disable the build-id messages. New description of `build-id-verbose' in the documentation. Resolve the RH Bug 432164. 2008-02-24 Jan Kratochvil Port to GDB-6.8pre. 2008-03-09 Jan Kratochvil Implement the `debuginfo-install' rpm/yum integration. Resolve the RH Bug 435581. Index: gdb-6.7.50.20080227/gdb/Makefile.in =================================================================== --- gdb-6.7.50.20080227.orig/gdb/Makefile.in 2008-03-10 00:48:52.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/Makefile.in 2008-03-10 00:48:53.000000000 +0100 @@ -392,7 +392,7 @@ INSTALLED_LIBS=-lbfd -lreadline -lopcode CLIBS = $(SIM) $(READLINE) $(OPCODES) $(BFD) $(INTL) $(LIBIBERTY) $(LIBDECNUMBER) \ $(XM_CLIBS) $(TM_CLIBS) $(NAT_CLIBS) $(GDBTKLIBS) @LIBS@ \ $(LIBICONV) $(LIBEXPAT) \ - $(LIBIBERTY) $(WIN32LIBS) + $(LIBIBERTY) $(WIN32LIBS) -lrpm CDEPS = $(XM_CDEPS) $(TM_CDEPS) $(NAT_CDEPS) $(SIM) $(BFD) $(READLINE_DEPS) \ $(OPCODES) $(INTL_DEPS) $(LIBIBERTY) $(CONFIG_DEPS) @@ -2029,7 +2029,8 @@ 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) $(filenames_h) + $(exceptions_h) $(solib_h) $(filenames_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) \ @@ -2117,7 +2118,7 @@ event-loop.o: event-loop.c $(defs_h) $(e event-top.o: event-top.c $(defs_h) $(top_h) $(inferior_h) $(target_h) \ $(terminal_h) $(event_loop_h) $(event_top_h) $(interps_h) \ $(exceptions_h) $(cli_script_h) $(gdbcmd_h) $(readline_h) \ - $(readline_history_h) + $(readline_history_h) $(symfile_h) exceptions.o: exceptions.c $(defs_h) $(exceptions_h) $(breakpoint_h) \ $(target_h) $(inferior_h) $(annotate_h) $(ui_out_h) $(gdb_assert_h) \ $(gdb_string_h) $(serial_h) @@ -2884,7 +2885,8 @@ 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) $(solib_h) + $(parser_defs_h) $(varobj_h) $(elf_bfd_h) $(solib_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) @@ -3325,7 +3327,7 @@ tui-hooks.o: $(srcdir)/tui/tui-hooks.c $ tui-interp.o: $(srcdir)/tui/tui-interp.c $(defs_h) $(interps_h) $(top_h) \ $(event_top_h) $(event_loop_h) $(ui_out_h) $(cli_out_h) \ $(tui_data_h) $(readline_h) $(tui_win_h) $(tui_h) $(tui_io_h) \ - $(exceptions_h) + $(exceptions_h) $(symfile_h) $(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/tui/tui-interp.c tui-io.o: $(srcdir)/tui/tui-io.c $(defs_h) $(target_h) \ $(event_loop_h) $(event_top_h) $(command_h) $(top_h) $(tui_h) \ Index: gdb-6.7.50.20080227/gdb/corelow.c =================================================================== --- gdb-6.7.50.20080227.orig/gdb/corelow.c 2008-02-09 14:45:33.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/corelow.c 2008-03-10 00:49:19.000000000 +0100 @@ -45,6 +45,10 @@ #include "exceptions.h" #include "solib.h" #include "filenames.h" +#include "auxv.h" +#include "elf/common.h" +#include "objfiles.h" +#include "gdbcmd.h" #ifndef O_LARGEFILE @@ -248,6 +252,56 @@ 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 +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 + debug_print_missing (_("the main executable file"), 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); + /* For EXEC_FILENAME NULL we were already complaining above. */ + if (symfile_objfile == NULL && exec_filename != NULL) + debug_print_missing (exec_filename, 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 @@ -344,6 +398,15 @@ 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); @@ -692,4 +755,11 @@ _initialize_corelow (void) if (!coreops_suppress_target) add_target (&core_ops); + + add_setshow_boolean_cmd ("build-id-core-loads", class_files, + &build_id_core_loads, _("\ +Set whether CORE-FILE loads the build-id associated files automatically."), _("\ +Show whether CORE-FILE loads the build-id associated files automatically.."), + NULL, NULL, NULL, + &setlist, &showlist); } Index: gdb-6.7.50.20080227/gdb/doc/gdb.texinfo =================================================================== --- gdb-6.7.50.20080227.orig/gdb/doc/gdb.texinfo 2008-03-10 00:48:52.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/doc/gdb.texinfo 2008-03-10 00:49:42.000000000 +0100 @@ -12208,6 +12208,27 @@ information files. @end table +You can also adjust the current verbosity of the @dfn{build id} locating. + +@table @code + +@kindex set build-id-verbose +@item set build-id-verbose 0 +No additional messages are printed. + +@item set build-id-verbose 1 +Missing separate debug filenames are printed. + +@item set build-id-verbose 2 +Missing separate debug filenames are printed and also all the parsing of the +binaries to find their @dfn{build id} content is printed. + +@kindex show build-id-verbose +@item show build-id-verbose +Show the current verbosity value for the @dfn{build id} content locating. + +@end table + @cindex @code{.gnu_debuglink} sections @cindex debug link sections A debug link is a special section of the executable file named Index: gdb-6.7.50.20080227/gdb/event-top.c =================================================================== --- gdb-6.7.50.20080227.orig/gdb/event-top.c 2008-01-01 23:53:09.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/event-top.c 2008-03-10 00:48:53.000000000 +0100 @@ -31,6 +31,7 @@ #include #include "exceptions.h" #include "cli/cli-script.h" /* for reset_command_nest_depth */ +#include "symfile.h" /* For dont_repeat() */ #include "gdbcmd.h" @@ -192,6 +193,8 @@ cli_command_loop (void) char *a_prompt; char *gdb_prompt = get_prompt (); + debug_flush_missing (); + /* Tell readline what the prompt to display is and what function it will need to call after a whole line is read. This also displays the first prompt. */ @@ -263,6 +266,8 @@ display_gdb_prompt (char *new_prompt) /* Reset the nesting depth used when trace-commands is set. */ reset_command_nest_depth (); + debug_flush_missing (); + /* Each interpreter has its own rules on displaying the command prompt. */ if (!current_interp_display_prompt_p ()) Index: gdb-6.7.50.20080227/gdb/solib-svr4.c =================================================================== --- gdb-6.7.50.20080227.orig/gdb/solib-svr4.c 2008-03-10 00:48:51.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/solib-svr4.c 2008-03-10 00:48:53.000000000 +0100 @@ -967,9 +967,34 @@ 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 + debug_print_missing (new->so_name, build_id_filename); + + xfree (build_id_filename); + xfree (build_id); + } + if (debug_solib) { fprintf_unfiltered (gdb_stdlog, Index: gdb-6.7.50.20080227/gdb/symfile.c =================================================================== --- gdb-6.7.50.20080227.orig/gdb/symfile.c 2008-03-10 00:48:51.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/symfile.c 2008-03-10 00:49:33.000000000 +0100 @@ -54,6 +54,9 @@ #include "varobj.h" #include "elf-bfd.h" #include "solib.h" +#include "gdb_stdint.h" +#include "libbfd.h" +#include "elf/external.h" #include #include @@ -62,6 +65,7 @@ #include #include #include +#include int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num); @@ -1235,16 +1239,65 @@ 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. */ + +#define BUILD_ID_VERBOSE_NONE 0 +#define BUILD_ID_VERBOSE_FILENAMES 1 +#define BUILD_ID_VERBOSE_BINARY_PARSE 2 +static int build_id_verbose = BUILD_ID_VERBOSE_FILENAMES; +static void +show_build_id_verbose (struct ui_file *file, int from_tty, + struct cmd_list_element *c, const char *value) +{ + fprintf_filtered (file, _("Verbosity level 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; @@ -1260,6 +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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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_verbose >= BUILD_ID_VERBOSE_BINARY_PARSE) + 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 @@ -1274,7 +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); @@ -1290,8 +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; @@ -1299,7 +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) { @@ -1310,12 +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)) { @@ -1323,9 +1723,433 @@ build_id_to_debug_filename (struct build retval = NULL; } + if (link_return != NULL) + *link_return = link; + else + xfree (link); + return retval; } +#include +#include +#include +#include +#include + +/* This MISSING_RPM_HASH tracker is used to collect all the missing rpm files + and avoid their duplicities during a single inferior run. */ + +static struct htab *missing_rpm_hash; + +/* This MISSING_RPM_LIST tracker is used to collect and print as a single line + all the rpms right before the nearest GDB prompt. It gets cleared after + each such print (it is questionable if we should clear it after the print). + */ + +struct missing_rpm + { + struct missing_rpm *next; + char rpm[1]; + }; +static struct missing_rpm *missing_rpm_list; +static int missing_rpm_list_entries; + +/* Returns the count of newly added rpms. */ + +static int +missing_rpm_enlist (const char *filename) +{ + static int rpm_init_done = 0; + rpmts ts; + rpmdbMatchIterator mi; + int count = 0; + + if (filename == NULL) + return 0; + + if (!rpm_init_done) + { + if (rpmReadConfigFiles(NULL, NULL) != 0) + { + warning (_("Error reading the rpm configuration files")); + return 0; + } + rpm_init_done = 1; + } + + ts = rpmtsCreate (); + + mi = rpmtsInitIterator (ts, RPMTAG_BASENAMES, filename, 0); + if (mi != NULL) + { + for (;;) + { + Header h; + char *s, *srcrpm, *verrel, *debuginfo; + union + { + void *voidp; + char *s; + } + sourcerpm, arch; + char **slot; + rpmdbMatchIterator mi_debuginfo; + + h = rpmdbNextIterator (mi); + if (h == NULL) + break; + + if (!headerGetEntry (h, RPMTAG_SOURCERPM, NULL, &sourcerpm.voidp, + NULL)) + { + warning (_("Error querying the rpm file `%s' %s"), filename, + "RPMTAG_SOURCERPM"); + continue; + } + srcrpm = sourcerpm.s + strlen (sourcerpm.s) - (sizeof ".src.rpm" - 1); + if (srcrpm < sourcerpm.s || strcmp (srcrpm, ".src.rpm") != 0) + { +error_parsing_sourcerpm: + warning (_("Error parsing %%{sourcerpm} of the rpm file `%s': %s"), + filename, sourcerpm.s); + continue; + } + s = srcrpm; + + /* Skip the release. */ + + while (s > sourcerpm.s && s[-1] != '-') + s--; + if (s == sourcerpm.s) + goto error_parsing_sourcerpm; + s--; + + /* Skip the version. */ + + while (s > sourcerpm.s && s[-1] != '-') + s--; + if (s == sourcerpm.s) + goto error_parsing_sourcerpm; + s--; + verrel = s; + + if (!headerGetEntry (h, RPMTAG_ARCH, NULL, &arch.voidp, NULL)) + { + warning (_("Error querying the rpm file `%s' %s"), filename, + "RPMTAG_ARCH"); + continue; + } + + /* The allocated memory gets utilized below for MISSING_RPM_HASH. */ + + debuginfo = xmalloc (strlen (sourcerpm.s) + strlen (arch.s) + 32); + + /* Verify the debuginfo file is not already installed. */ + + sprintf (debuginfo, "%.*s-debuginfo%.*s.%s", + (int) (verrel - sourcerpm.s), sourcerpm.s, + (int) (srcrpm - verrel), verrel, arch.s); + mi_debuginfo = rpmtsInitIterator (ts, RPMDBI_LABEL, debuginfo, 0); + if (mi_debuginfo != NULL) + { + Header h_debuginfo; + + h_debuginfo = rpmdbNextIterator (mi_debuginfo); + rpmdbFreeIterator (mi_debuginfo); + if (h_debuginfo != NULL) + { + xfree (debuginfo); + + /* We ignore any != 0 for possibly already enlisted rpms as + it should not hurt much. */ + + count = 0; + break; + } + } + + /* Base package name for `debuginfo-install'. We do not use `yum' + as its command + yum --enablerepo='*-debuginfo' install BASE-debuginfo.ARCH + would be more complicated than just: + debuginfo-install BASE.ARCH + We do not need to supply the version-release as + `debuginfo-install' always installs only the debuginfo matching + the currently installed rpm. Still we must supply `.%{arch}' as + we may have multilib (multiple arch-differing rpm packages) + installed. + FUTURE: After multiple debuginfo versions simultaneously installed + get supported we may need to supply the version-release here. */ + + sprintf (debuginfo, "%.*s.%s", (int) (verrel - sourcerpm.s), + sourcerpm.s, arch.s); + + if (missing_rpm_hash == NULL) + { + /* DEL_F is passed NULL as MISSING_RPM_LIST's HTAB_DELETE + should not deallocate the entries. */ + + missing_rpm_hash = htab_create_alloc (64, htab_hash_string, + (int (*) (const void *, const void *)) streq, + NULL, xcalloc, xfree); + } + slot = (char **) htab_find_slot (missing_rpm_hash, debuginfo, INSERT); + /* XCALLOC never returns NULL. */ + gdb_assert (slot != NULL); + if (*slot == NULL) + { + struct missing_rpm *missing_rpm; + + *slot = debuginfo; + + missing_rpm = xmalloc (sizeof (*missing_rpm) + strlen (debuginfo)); + strcpy (missing_rpm->rpm, debuginfo); + missing_rpm->next = missing_rpm_list; + missing_rpm_list = missing_rpm; + missing_rpm_list_entries++; + } + else + xfree (debuginfo); + count++; + } + + rpmdbFreeIterator (mi); + } + + rpmtsFree (ts); + + return count; +} + +static int +missing_rpm_list_compar (const char *const *ap, const char *const *bp) +{ + return strcoll (*ap, *bp); +} + +/* It returns a NULL-terminated array of strings needing to be FREEd. It may + also return only NULL. */ + +static void +missing_rpm_list_print (void) +{ + char **array, **array_iter; + struct missing_rpm *list_iter; + + if (missing_rpm_list_entries == 0) + return; + + array = xmalloc (sizeof (*array) * missing_rpm_list_entries); + array_iter = array; + for (list_iter = missing_rpm_list; list_iter != NULL; + list_iter = list_iter->next) + { + *array_iter++ = list_iter->rpm; + } + gdb_assert (array_iter == array + missing_rpm_list_entries); + + qsort (array, missing_rpm_list_entries, sizeof (*array), + (int (*) (const void *, const void *)) missing_rpm_list_compar); + + printf (_("Missing separate debuginfos, use: %s"), "debuginfo-install"); + for (array_iter = array; array_iter < array + missing_rpm_list_entries; + array_iter++) + { + putchar (' '); + fputs (*array_iter, stdout); + } + putchar ('\n'); + + xfree (array); + while (missing_rpm_list != NULL) + { + list_iter = missing_rpm_list; + missing_rpm_list = list_iter->next; + xfree (list_iter); + } + missing_rpm_list_entries = 0; +} + +static void +missing_rpm_change (void) +{ + debug_flush_missing (); + + gdb_assert (missing_rpm_list == NULL); + if (missing_rpm_hash != NULL) + { + htab_delete (missing_rpm_hash); + missing_rpm_hash = NULL; + } +} + +enum missing_exec + { + /* Init state. EXEC_BFD also still could be NULL. */ + MISSING_EXEC_NOT_TRIED, + /* We saw a non-NULL EXEC_BFD but RPM has no info about it. */ + MISSING_EXEC_NOT_FOUND, + /* We found EXEC_BFD by RPM and we either have its symbols (either embedded + or separate) or the main executable's RPM is now contained in + MISSING_RPM_HASH. */ + MISSING_EXEC_ENLISTED + }; +static enum missing_exec missing_exec = MISSING_EXEC_NOT_TRIED; + +void +debug_flush_missing (void) +{ + missing_rpm_list_print (); +} + +/* This MISSING_FILEPAIR_HASH tracker is used only for the duplicite messages + yum --enablerepo='*-debuginfo' install ... + avoidance. */ + +struct missing_filepair + { + char *binary; + char *debug; + char data[1]; + }; + +static struct htab *missing_filepair_hash; +static struct obstack missing_filepair_obstack; + +static void * +missing_filepair_xcalloc (size_t nmemb, size_t nmemb_size) +{ + void *retval; + size_t size = nmemb * nmemb_size; + + retval = obstack_alloc (&missing_filepair_obstack, size); + memset (retval, 0, size); + return retval; +} + +static hashval_t +missing_filepair_hash_func (const struct missing_filepair *elem) +{ + hashval_t retval = 0; + + retval ^= htab_hash_string (elem->binary); + if (elem->debug != NULL) + retval ^= htab_hash_string (elem->debug); + + return retval; +} + +static int +missing_filepair_eq (const struct missing_filepair *elem1, + const struct missing_filepair *elem2) +{ + return strcmp (elem1->binary, elem2->binary) == 0 + && ((elem1->debug == NULL && elem2->debug == NULL) + || strcmp (elem1->debug, elem2->debug) == 0); +} + +static void +missing_filepair_change (void) +{ + if (missing_filepair_hash != NULL) + { + obstack_free (&missing_filepair_obstack, NULL); + /* All their memory came just from missing_filepair_OBSTACK. */ + missing_filepair_hash = NULL; + } + missing_exec = MISSING_EXEC_NOT_TRIED; +} + +static void +debug_print_executable_changed (void *unused) +{ + missing_rpm_change (); + missing_filepair_change (); +} + +/* Notify user the file BINARY with (possibly NULL) associated separate debug + information file DEBUG is missing. DEBUG may or may not be the build-id + file such as would be: + /usr/lib/debug/.build-id/dd/b1d2ce632721c47bb9e8679f369e2295ce71be.debug + */ + +void +debug_print_missing (const char *binary, const char *debug) +{ + size_t binary_len0 = strlen (binary) + 1; + size_t debug_len0 = debug ? strlen (debug) + 1 : 0; + struct missing_filepair *missing_filepair; + struct missing_filepair **slot; + + if (build_id_verbose < BUILD_ID_VERBOSE_FILENAMES) + return; + + if (missing_filepair_hash == NULL) + { + obstack_init (&missing_filepair_obstack); + missing_filepair_hash = htab_create_alloc (64, + (hashval_t (*) (const void *)) missing_filepair_hash_func, + (int (*) (const void *, const void *)) missing_filepair_eq, NULL, + missing_filepair_xcalloc, NULL); + } + + missing_filepair = obstack_alloc (&missing_filepair_obstack, + sizeof (*missing_filepair) - 1 + + binary_len0 + debug_len0); + missing_filepair->binary = missing_filepair->data; + memcpy (missing_filepair->binary, binary, binary_len0); + if (debug != NULL) + { + missing_filepair->debug = missing_filepair->binary + binary_len0; + memcpy (missing_filepair->debug, debug, debug_len0); + } + else + missing_filepair->debug = NULL; + + slot = (struct missing_filepair **) htab_find_slot (missing_filepair_hash, + missing_filepair, + INSERT); + + /* While it may be still printed duplicitely with the missing debuginfo file + * it is due to once printing about the binary file build-id link and once + * about the .debug file build-id link as both the build-id symlinks are + * located in the debuginfo package. */ + + if (*slot != NULL) + { + obstack_free (&missing_filepair_obstack, missing_filepair); + return; + } + *slot = missing_filepair; + + if (missing_exec == MISSING_EXEC_NOT_TRIED) + { + char *exec_filename; + + exec_filename = get_exec_file (0); + if (exec_filename != NULL) + { + if (missing_rpm_enlist (exec_filename) == 0) + missing_exec = MISSING_EXEC_NOT_FOUND; + else + missing_exec = MISSING_EXEC_ENLISTED; + } + } + if (missing_exec != MISSING_EXEC_ENLISTED) + if (missing_rpm_enlist (binary) == 0 && missing_rpm_enlist (debug) == 0) + { + /* We do not collect and flush these messages as each such message + already requires its own separate lines. */ + + fprintf_unfiltered (gdb_stdlog, + _("Missing separate debuginfo for %s\n"), binary); + if (debug != NULL) + fprintf_unfiltered (gdb_stdlog, _("Try: %s %s\n"), + "yum --enablerepo='*-debuginfo' install", debug); + } +} + static char * get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) { @@ -1411,32 +2235,36 @@ static char * find_separate_debug_file (struct objfile *objfile) { asection *sect; - char *basename; - char *dir; - char *debugfile; + char *basename = NULL; + char *dir = NULL; + char *debugfile = NULL; char *name_copy; - char *canon_name; + char *canon_name = NULL; bfd_size_type debuglink_size; 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); @@ -1444,7 +2272,7 @@ 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; + goto cleanup_return_debugfile; dir = xstrdup (objfile->name); @@ -1460,23 +2288,19 @@ find_separate_debug_file (struct objfile gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); dir[i+1] = '\0'; - debugfile = alloca (strlen (debug_file_directory) + 1 - + strlen (dir) - + strlen (DEBUG_SUBDIRECTORY) - + strlen ("/") - + strlen (basename) - + 1); + debugfile = xmalloc (strlen (debug_file_directory) + 1 + + strlen (dir) + + strlen (DEBUG_SUBDIRECTORY) + + strlen ("/") + + strlen (basename) + + 1); /* First try in the same directory as the original file. */ strcpy (debugfile, dir); strcat (debugfile, basename); if (separate_debug_file_exists (debugfile, crc32, objfile->name)) - { - xfree (basename); - xfree (dir); - return xstrdup (debugfile); - } + goto cleanup_return_debugfile; /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ strcpy (debugfile, dir); @@ -1485,11 +2309,7 @@ find_separate_debug_file (struct objfile strcat (debugfile, basename); if (separate_debug_file_exists (debugfile, crc32, objfile->name)) - { - xfree (basename); - xfree (dir); - return xstrdup (debugfile); - } + goto cleanup_return_debugfile; /* Then try in the global debugfile directory. */ strcpy (debugfile, debug_file_directory); @@ -1498,11 +2318,7 @@ find_separate_debug_file (struct objfile strcat (debugfile, basename); if (separate_debug_file_exists (debugfile, crc32, objfile->name)) - { - xfree (basename); - xfree (dir); - return xstrdup (debugfile); - } + goto cleanup_return_debugfile; /* If the file is in the sysroot, try using its base path in the global debugfile directory. */ @@ -1517,20 +2333,18 @@ find_separate_debug_file (struct objfile strcat (debugfile, basename); if (separate_debug_file_exists (debugfile, crc32, objfile->name)) - { - xfree (canon_name); - xfree (basename); - xfree (dir); - return xstrdup (debugfile); - } + goto cleanup_return_debugfile; } - - if (canon_name) - xfree (canon_name); + debugfile = NULL; + debug_print_missing (objfile->name, build_id_filename); + +cleanup_return_debugfile: + xfree (build_id_filename); + xfree (canon_name); xfree (basename); xfree (dir); - return NULL; + return debugfile; } @@ -4220,4 +5034,16 @@ the global debug-file directory prepende NULL, show_debug_file_directory, &setlist, &showlist); + + add_setshow_zinteger_cmd ("build-id-verbose", no_class, &build_id_verbose, + _("\ +Set debugging level of the build-id locator."), _("\ +Show debugging level of the build-id locator."), _("\ +Level 1 (default) enables printing the missing debug filenames,\n\ +level 2 also prints the parsing of binaries to find the identificators."), + NULL, + show_build_id_verbose, + &setlist, &showlist); + + observer_attach_executable_changed (debug_print_executable_changed); } Index: gdb-6.7.50.20080227/gdb/symfile.h =================================================================== --- gdb-6.7.50.20080227.orig/gdb/symfile.h 2008-02-03 23:13:29.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/symfile.h 2008-03-10 00:48:53.000000000 +0100 @@ -358,6 +358,14 @@ 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); +extern void debug_print_missing (const char *binary, const char *debug); +extern void debug_flush_missing (void); + /* From dwarf2read.c */ extern int dwarf2_has_info (struct objfile *); Index: gdb-6.7.50.20080227/gdb/tui/tui-interp.c =================================================================== --- gdb-6.7.50.20080227.orig/gdb/tui/tui-interp.c 2008-01-01 23:53:22.000000000 +0100 +++ gdb-6.7.50.20080227/gdb/tui/tui-interp.c 2008-03-10 00:48:53.000000000 +0100 @@ -30,6 +30,7 @@ #include "tui/tui.h" #include "tui/tui-io.h" #include "exceptions.h" +#include "symfile.h" /* Set to 1 when the TUI mode must be activated when we first start gdb. */ @@ -128,6 +129,8 @@ tui_command_loop (void *data) char *a_prompt; char *gdb_prompt = get_prompt (); + debug_flush_missing (); + /* Tell readline what the prompt to display is and what function it will need to call after a whole line is read. This also displays the first prompt. */