X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fgcore.c;h=eb108feb790c3c7d61c6c74fcfacdb2f20935f23;hb=268a13a5a3f7c6b9b6ffc5ac2d1b24eb41f3fbdc;hp=e22508010012e466e7a05d35bb68e9941b165239;hpb=3b7344d5ab495cd82b6c72ec5e00d018549837fb;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/gcore.c b/gdb/gcore.c index e225080100..eb108feb79 100644 --- a/gdb/gcore.c +++ b/gdb/gcore.c @@ -1,6 +1,6 @@ /* Generate a core file for the inferior process. - Copyright (C) 2001-2014 Free Software Foundation, Inc. + Copyright (C) 2001-2019 Free Software Foundation, Inc. This file is part of GDB. @@ -29,12 +29,15 @@ #include "completer.h" #include "gcore.h" #include "cli/cli-decode.h" -#include "gdb_assert.h" #include #include "regcache.h" #include "regset.h" #include "gdb_bfd.h" #include "readline/tilde.h" +#include +#include "gdbsupport/gdb_unlinker.h" +#include "gdbsupport/byte-vector.h" +#include "gdbsupport/scope-exit.h" /* The largest amount of memory to read from the target at once. We must throttle it to limit the amount of memory used by GDB during @@ -49,26 +52,24 @@ static int gcore_memory_sections (bfd *); /* create_gcore_bfd -- helper for gcore_command (exported). Open a new bfd core file for output, and return the handle. */ -bfd * +gdb_bfd_ref_ptr create_gcore_bfd (const char *filename) { - bfd *obfd = gdb_bfd_openw (filename, default_gcore_target ()); + gdb_bfd_ref_ptr obfd (gdb_bfd_openw (filename, default_gcore_target ())); - if (!obfd) + if (obfd == NULL) error (_("Failed to open '%s' for output."), filename); - bfd_set_format (obfd, bfd_core); - bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); + bfd_set_format (obfd.get (), bfd_core); + bfd_set_arch_mach (obfd.get (), default_gcore_arch (), default_gcore_mach ()); return obfd; } -/* write_gcore_file -- helper for gcore_command (exported). - Compose and write the corefile data to the core file. */ - +/* write_gcore_file_1 -- do the actual work of write_gcore_file. */ -void -write_gcore_file (bfd *obfd) +static void +write_gcore_file_1 (bfd *obfd) { - void *note_data = NULL; + gdb::unique_xmalloc_ptr note_data; int note_size = 0; asection *note_sec = NULL; @@ -77,9 +78,10 @@ write_gcore_file (bfd *obfd) generation should be converted to gdbarch_make_corefile_notes; at that point, the target vector method can be removed. */ if (!gdbarch_make_corefile_notes_p (target_gdbarch ())) - note_data = target_make_corefile_notes (obfd, ¬e_size); + note_data.reset (target_make_corefile_notes (obfd, ¬e_size)); else - note_data = gdbarch_make_corefile_notes (target_gdbarch (), obfd, ¬e_size); + note_data.reset (gdbarch_make_corefile_notes (target_gdbarch (), obfd, + ¬e_size)); if (note_data == NULL || note_size == 0) error (_("Target does not support core file generation.")); @@ -102,63 +104,60 @@ write_gcore_file (bfd *obfd) error (_("gcore: failed to get corefile memory sections from target.")); /* Write out the contents of the note section. */ - if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) + if (!bfd_set_section_contents (obfd, note_sec, note_data.get (), 0, + note_size)) warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ())); } -static void -do_bfd_delete_cleanup (void *arg) -{ - bfd *obfd = arg; - const char *filename = obfd->filename; +/* write_gcore_file -- helper for gcore_command (exported). + Compose and write the corefile data to the core file. */ - gdb_bfd_unref (arg); - unlink (filename); +void +write_gcore_file (bfd *obfd) +{ + target_prepare_to_generate_core (); + SCOPE_EXIT { target_done_generating_core (); }; + write_gcore_file_1 (obfd); } /* gcore_command -- implements the 'gcore' command. Generate a core file from the inferior process. */ static void -gcore_command (char *args, int from_tty) +gcore_command (const char *args, int from_tty) { - struct cleanup *filename_chain; - struct cleanup *bfd_chain; - char *corefilename; - bfd *obfd; + gdb::unique_xmalloc_ptr corefilename; /* No use generating a corefile without a target process. */ if (!target_has_execution) noprocess (); if (args && *args) - corefilename = tilde_expand (args); + corefilename.reset (tilde_expand (args)); else { /* Default corefile name is "core.PID". */ - corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid)); + corefilename.reset (xstrprintf ("core.%d", inferior_ptid.pid ())); } - filename_chain = make_cleanup (xfree, corefilename); if (info_verbose) fprintf_filtered (gdb_stdout, - "Opening corefile '%s' for output.\n", corefilename); + "Opening corefile '%s' for output.\n", + corefilename.get ()); /* Open the output file. */ - obfd = create_gcore_bfd (corefilename); + gdb_bfd_ref_ptr obfd (create_gcore_bfd (corefilename.get ())); - /* Need a cleanup that will close and delete the file. */ - bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd); + /* Arrange to unlink the file on failure. */ + gdb::unlinker unlink_file (corefilename.get ()); /* Call worker function. */ - write_gcore_file (obfd); + write_gcore_file (obfd.get ()); /* Succeeded. */ - discard_cleanups (bfd_chain); - gdb_bfd_unref (obfd); + unlink_file.keep (); - fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename); - do_cleanups (filename_chain); + fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename.get ()); } static unsigned long @@ -287,7 +286,7 @@ call_target_sbrk (int sbrk_arg) target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int, sbrk_arg); gdb_assert (target_sbrk_arg); - ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg); + ret = call_function_by_hand (sbrk_fn, NULL, target_sbrk_arg); if (ret == NULL) return (bfd_vma) 0; @@ -366,9 +365,9 @@ make_output_phdrs (bfd *obfd, asection *osec, void *ignored) int p_type = 0; /* FIXME: these constants may only be applicable for ELF. */ - if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0) + if (startswith (bfd_section_name (obfd, osec), "load")) p_type = PT_LOAD; - else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0) + else if (startswith (bfd_section_name (obfd, osec), "note")) p_type = PT_NOTE; else p_type = PT_NULL; @@ -389,7 +388,7 @@ static int gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, int write, int exec, int modified, void *data) { - bfd *obfd = data; + bfd *obfd = (bfd *) data; asection *osec; flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD; @@ -411,34 +410,34 @@ gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read, { /* See if this region of memory lies inside a known file on disk. If so, we can avoid copying its contents by clearing SEC_LOAD. */ - struct objfile *objfile; struct obj_section *objsec; - ALL_OBJSECTIONS (objfile, objsec) - { - bfd *abfd = objfile->obfd; - asection *asec = objsec->the_bfd_section; - bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, - asec); - bfd_vma start = obj_section_addr (objsec) & -align; - bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; - - /* Match if either the entire memory region lies inside the - section (i.e. a mapping covering some pages of a large - segment) or the entire section lies inside the memory region - (i.e. a mapping covering multiple small sections). - - This BFD was synthesized from reading target memory, - we don't want to omit that. */ - if (objfile->separate_debug_objfile_backlink == NULL - && ((vaddr >= start && vaddr + size <= end) - || (start >= vaddr && end <= vaddr + size)) - && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) - { - flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); - goto keep; /* Break out of two nested for loops. */ - } - } + for (objfile *objfile : current_program_space->objfiles ()) + ALL_OBJFILE_OSECTIONS (objfile, objsec) + { + bfd *abfd = objfile->obfd; + asection *asec = objsec->the_bfd_section; + bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd, + asec); + bfd_vma start = obj_section_addr (objsec) & -align; + bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align; + + /* Match if either the entire memory region lies inside the + section (i.e. a mapping covering some pages of a large + segment) or the entire section lies inside the memory region + (i.e. a mapping covering multiple small sections). + + This BFD was synthesized from reading target memory, + we don't want to omit that. */ + if (objfile->separate_debug_objfile_backlink == NULL + && ((vaddr >= start && vaddr + size <= end) + || (start >= vaddr && end <= vaddr + size)) + && !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY)) + { + flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); + goto keep; /* Break out of two nested for loops. */ + } + } keep:; } @@ -476,36 +475,36 @@ objfile_find_memory_regions (struct target_ops *self, find_memory_region_ftype func, void *obfd) { /* Use objfile data to create memory sections. */ - struct objfile *objfile; struct obj_section *objsec; bfd_vma temp_bottom, temp_top; /* Call callback function for each objfile section. */ - ALL_OBJSECTIONS (objfile, objsec) - { - bfd *ibfd = objfile->obfd; - asection *isec = objsec->the_bfd_section; - flagword flags = bfd_get_section_flags (ibfd, isec); - - /* Separate debug info files are irrelevant for gcore. */ - if (objfile->separate_debug_objfile_backlink != NULL) - continue; - - if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) - { - int size = bfd_section_size (ibfd, isec); - int ret; - - ret = (*func) (obj_section_addr (objsec), size, - 1, /* All sections will be readable. */ - (flags & SEC_READONLY) == 0, /* Writable. */ - (flags & SEC_CODE) != 0, /* Executable. */ - 1, /* MODIFIED is unknown, pass it as true. */ - obfd); - if (ret != 0) - return ret; - } - } + for (objfile *objfile : current_program_space->objfiles ()) + ALL_OBJFILE_OSECTIONS (objfile, objsec) + { + bfd *ibfd = objfile->obfd; + asection *isec = objsec->the_bfd_section; + flagword flags = bfd_get_section_flags (ibfd, isec); + + /* Separate debug info files are irrelevant for gcore. */ + if (objfile->separate_debug_objfile_backlink != NULL) + continue; + + if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) + { + int size = bfd_section_size (ibfd, isec); + int ret; + + ret = (*func) (obj_section_addr (objsec), size, + 1, /* All sections will be readable. */ + (flags & SEC_READONLY) == 0, /* Writable. */ + (flags & SEC_CODE) != 0, /* Executable. */ + 1, /* MODIFIED is unknown, pass it as true. */ + obfd); + if (ret != 0) + return ret; + } + } /* Make a stack segment. */ if (derive_stack_segment (&temp_bottom, &temp_top)) @@ -533,20 +532,17 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) { bfd_size_type size, total_size = bfd_section_size (obfd, osec); file_ptr offset = 0; - struct cleanup *old_chain = NULL; - void *memhunk; /* Read-only sections are marked; we don't have to copy their contents. */ if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0) return; /* Only interested in "load" sections. */ - if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0) + if (!startswith (bfd_section_name (obfd, osec), "load")) return; - size = min (total_size, MAX_COPY_BYTES); - memhunk = xmalloc (size); - old_chain = make_cleanup (xfree, memhunk); + size = std::min (total_size, (bfd_size_type) MAX_COPY_BYTES); + gdb::byte_vector memhunk (size); while (total_size > 0) { @@ -554,7 +550,7 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) size = total_size; if (target_read_memory (bfd_section_vma (obfd, osec) + offset, - memhunk, size) != 0) + memhunk.data (), size) != 0) { warning (_("Memory read failed for corefile " "section, %s bytes at %s."), @@ -562,7 +558,8 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) paddress (target_gdbarch (), bfd_section_vma (obfd, osec))); break; } - if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size)) + if (!bfd_set_section_contents (obfd, osec, memhunk.data (), + offset, size)) { warning (_("Failed to write corefile contents (%s)."), bfd_errmsg (bfd_get_error ())); @@ -572,8 +569,6 @@ gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) total_size -= size; offset += size; } - - do_cleanups (old_chain); /* Frees MEMHUNK. */ } static int @@ -597,15 +592,13 @@ gcore_memory_sections (bfd *obfd) return 1; } -/* Provide a prototype to silence -Wmissing-prototypes. */ -extern initialize_file_ftype _initialize_gcore; - void _initialize_gcore (void) { add_com ("generate-core-file", class_files, gcore_command, _("\ Save a core file with the current state of the debugged process.\n\ -Argument is optional filename. Default filename is 'core.'.")); +Usage: generate-core-file [FILENAME]\n\ +Argument is optional filename. Default filename is 'core.PROCESS_ID'.")); add_com_alias ("gcore", "generate-core-file", class_files, 1); }