diff options
| -rw-r--r-- | gdb/ChangeLog | 10 | ||||
| -rw-r--r-- | gdb/gdb_bfd.c | 34 | ||||
| -rw-r--r-- | gdb/gdb_bfd.h | 9 | ||||
| -rw-r--r-- | gdb/solib-darwin.c | 32 |
4 files changed, 68 insertions, 17 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 41b687a..632f6cf 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,13 @@ +2012-11-28 Tom Tromey <tromey@redhat.com> + + PR gdb/14290: + * solib-darwin.c (gdb_bfd_mach_o_fat_extract): New function. + (darwin_solib_get_all_image_info_addr_at_init, darwin_bfd_open): + Use it. + * gdb_bfd.h (gdb_bfd_mark_parent): Declare. + * gdb_bfd.c (gdb_bfd_mark_parent): New function. + (gdb_bfd_openr_next_archived_file): Use it. + 2012-11-28 Markus Metzger <markus.t.metzger@intel.com> * configure.ac: Check for linux/perf_event.h. diff --git a/gdb/gdb_bfd.c b/gdb/gdb_bfd.c index 2bcc4b4..f0e349b 100644 --- a/gdb/gdb_bfd.c +++ b/gdb/gdb_bfd.c @@ -499,24 +499,34 @@ gdb_bfd_openr_iovec (const char *filename, const char *target, /* See gdb_bfd.h. */ +void +gdb_bfd_mark_parent (bfd *child, bfd *parent) +{ + struct gdb_bfd_data *gdata; + + gdb_bfd_ref (child); + /* No need to stash the filename here, because we also keep a + reference on the parent archive. */ + + gdata = bfd_usrdata (child); + if (gdata->archive_bfd == NULL) + { + gdata->archive_bfd = parent; + gdb_bfd_ref (parent); + } + else + gdb_assert (gdata->archive_bfd == parent); +} + +/* See gdb_bfd.h. */ + bfd * gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) { bfd *result = bfd_openr_next_archived_file (archive, previous); if (result) - { - struct gdb_bfd_data *gdata; - - gdb_bfd_ref (result); - /* No need to stash the filename here, because we also keep a - reference on the parent archive. */ - - gdata = bfd_usrdata (result); - gdb_assert (gdata->archive_bfd == NULL || gdata->archive_bfd == archive); - gdata->archive_bfd = archive; - gdb_bfd_ref (archive); - } + gdb_bfd_mark_parent (result, archive); return result; } diff --git a/gdb/gdb_bfd.h b/gdb/gdb_bfd.h index 5fd361c..bb70b27 100644 --- a/gdb/gdb_bfd.h +++ b/gdb/gdb_bfd.h @@ -50,6 +50,15 @@ void gdb_bfd_ref (struct bfd *abfd); void gdb_bfd_unref (struct bfd *abfd); +/* Mark the CHILD BFD as being a member of PARENT. Also, increment + the reference count of CHILD. Calling this function ensures that + as along as CHILD remains alive, PARENT will as well. Both CHILD + and PARENT must be non-NULL. This can be called more than once + with the same arguments; but it is not allowed to call it for a + single CHILD with different values for PARENT. */ + +void gdb_bfd_mark_parent (bfd *child, bfd *parent); + /* Try to read or map the contents of the section SECT. If successful, the section data is returned and *SIZE is set to the size of the section data; this may not be the same as the size diff --git a/gdb/solib-darwin.c b/gdb/solib-darwin.c index 4ea0722..735d1c3 100644 --- a/gdb/solib-darwin.c +++ b/gdb/solib-darwin.c @@ -348,6 +348,27 @@ darwin_special_symbol_handling (void) { } +/* A wrapper for bfd_mach_o_fat_extract that handles reference + counting properly. This will either return NULL, or return a new + reference to a BFD. */ + +static bfd * +gdb_bfd_mach_o_fat_extract (bfd *abfd, bfd_format format, + const bfd_arch_info_type *arch) +{ + bfd *result = bfd_mach_o_fat_extract (abfd, format, arch); + + if (result == NULL) + return NULL; + + if (result == abfd) + gdb_bfd_ref (result); + else + gdb_bfd_mark_parent (result, abfd); + + return result; +} + /* Extract dyld_all_image_addr when the process was just created, assuming the current PC is at the entry of the dynamic linker. */ @@ -377,12 +398,11 @@ darwin_solib_get_all_image_info_addr_at_init (struct darwin_info *info) bfd *sub; make_cleanup_bfd_unref (dyld_bfd); - sub = bfd_mach_o_fat_extract (dyld_bfd, bfd_object, - gdbarch_bfd_arch_info (target_gdbarch ())); + sub = gdb_bfd_mach_o_fat_extract (dyld_bfd, bfd_object, + gdbarch_bfd_arch_info (target_gdbarch ())); if (sub) { dyld_bfd = sub; - gdb_bfd_ref (sub); make_cleanup_bfd_unref (sub); } else @@ -514,14 +534,16 @@ darwin_bfd_open (char *pathname) /* Open bfd for shared library. */ abfd = solib_bfd_fopen (found_pathname, found_file); - res = bfd_mach_o_fat_extract (abfd, bfd_object, - gdbarch_bfd_arch_info (target_gdbarch ())); + res = gdb_bfd_mach_o_fat_extract (abfd, bfd_object, + gdbarch_bfd_arch_info (target_gdbarch ())); if (!res) { make_cleanup_bfd_unref (abfd); error (_("`%s': not a shared-library: %s"), bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); } + + gdb_bfd_unref (abfd); return res; } |