* dwarf2read.c (read_and_check_comp_unit_head): Renamed from
partial_read_comp_unit_head. Replace "buffer", "buffer_size" and "abfd" args with "section". All callers updated. Error checking code moved ... (error_check_comp_unit_head): ... here. New function. (read_and_check_type_unit_head): Renamed from read_type_unit_head. Delete arg "abfd". New arg "type_offset". All callers updated. (create_debug_types_hash_table): Simplify by using read_and_check_type_unit_head.
This commit is contained in:
Doug Evans
parent
1a4eeb9811
commit
9ff913ba1b
|
|
@ -1,5 +1,15 @@
|
|||
2012-01-09 Doug Evans <dje@google.com>
|
||||
|
||||
* dwarf2read.c (read_and_check_comp_unit_head): Renamed from
|
||||
partial_read_comp_unit_head. Replace "buffer", "buffer_size" and
|
||||
"abfd" args with "section". All callers updated.
|
||||
Error checking code moved ...
|
||||
(error_check_comp_unit_head): ... here. New function.
|
||||
(read_and_check_type_unit_head): Renamed from read_type_unit_head.
|
||||
Delete arg "abfd". New arg "type_offset". All callers updated.
|
||||
(create_debug_types_hash_table): Simplify by using
|
||||
read_and_check_type_unit_head.
|
||||
|
||||
* parser-defs.h (namecopy): Delete.
|
||||
* parse.c (namecopy, namecopy_size): Move into copy_name.
|
||||
|
||||
|
|
|
|||
190
gdb/dwarf2read.c
190
gdb/dwarf2read.c
|
|
@ -1275,12 +1275,10 @@ static void find_file_and_directory (struct die_info *die,
|
|||
static char *file_full_name (int file, struct line_header *lh,
|
||||
const char *comp_dir);
|
||||
|
||||
static gdb_byte *partial_read_comp_unit_head (struct comp_unit_head *header,
|
||||
gdb_byte *info_ptr,
|
||||
gdb_byte *buffer,
|
||||
unsigned int buffer_size,
|
||||
bfd *abfd,
|
||||
int is_debug_types_section);
|
||||
static gdb_byte *read_and_check_comp_unit_head
|
||||
(struct comp_unit_head *header,
|
||||
struct dwarf2_section_info *section, gdb_byte *info_ptr,
|
||||
int is_debug_types_section);
|
||||
|
||||
static void init_cu_die_reader (struct die_reader_specs *reader,
|
||||
struct dwarf2_cu *cu);
|
||||
|
|
@ -2216,10 +2214,10 @@ dw2_get_file_names (struct objfile *objfile,
|
|||
struct cleanup *cleanups;
|
||||
struct die_info *comp_unit_die;
|
||||
struct dwarf2_section_info* sec;
|
||||
gdb_byte *info_ptr, *buffer;
|
||||
gdb_byte *info_ptr;
|
||||
int has_children, i;
|
||||
struct dwarf2_cu cu;
|
||||
unsigned int bytes_read, buffer_size;
|
||||
unsigned int bytes_read;
|
||||
struct die_reader_specs reader_specs;
|
||||
char *name, *comp_dir;
|
||||
void **slot;
|
||||
|
|
@ -2240,17 +2238,13 @@ dw2_get_file_names (struct objfile *objfile,
|
|||
else
|
||||
sec = &dwarf2_per_objfile->info;
|
||||
dwarf2_read_section (objfile, sec);
|
||||
buffer_size = sec->size;
|
||||
buffer = sec->buffer;
|
||||
info_ptr = buffer + this_cu->offset;
|
||||
info_ptr = sec->buffer + this_cu->offset;
|
||||
|
||||
info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
|
||||
buffer, buffer_size,
|
||||
abfd,
|
||||
this_cu->debug_types_section != NULL);
|
||||
info_ptr = read_and_check_comp_unit_head (&cu.header, sec, info_ptr,
|
||||
this_cu->debug_types_section != NULL);
|
||||
|
||||
/* Skip dummy compilation units. */
|
||||
if (info_ptr >= buffer + buffer_size
|
||||
if (info_ptr >= (sec->buffer + sec->size)
|
||||
|| peek_abbrev_code (abfd, info_ptr) == 0)
|
||||
{
|
||||
do_cleanups (cleanups);
|
||||
|
|
@ -2954,16 +2948,55 @@ read_comp_unit_head (struct comp_unit_head *cu_header,
|
|||
return info_ptr;
|
||||
}
|
||||
|
||||
/* Read in a CU header and perform some basic error checking. */
|
||||
/* Subroutine of read_and_check_comp_unit_head and
|
||||
read_and_check_type_unit_head to simplify them.
|
||||
Perform various error checking on the header. */
|
||||
|
||||
static void
|
||||
error_check_comp_unit_head (struct comp_unit_head *header,
|
||||
struct dwarf2_section_info *section)
|
||||
{
|
||||
bfd *abfd = section->asection->owner;
|
||||
const char *filename = bfd_get_filename (abfd);
|
||||
|
||||
if (header->version != 2 && header->version != 3 && header->version != 4)
|
||||
error (_("Dwarf Error: wrong version in compilation unit header "
|
||||
"(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
|
||||
filename);
|
||||
|
||||
if (header->abbrev_offset
|
||||
>= dwarf2_section_size (dwarf2_per_objfile->objfile,
|
||||
&dwarf2_per_objfile->abbrev))
|
||||
error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
|
||||
"(offset 0x%lx + 6) [in module %s]"),
|
||||
(long) header->abbrev_offset, (long) header->offset,
|
||||
filename);
|
||||
|
||||
/* Cast to unsigned long to use 64-bit arithmetic when possible to
|
||||
avoid potential 32-bit overflow. */
|
||||
if (((unsigned long) header->offset
|
||||
+ header->length + header->initial_length_size)
|
||||
> section->size)
|
||||
error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
|
||||
"(offset 0x%lx + 0) [in module %s]"),
|
||||
(long) header->length, (long) header->offset,
|
||||
filename);
|
||||
}
|
||||
|
||||
/* Read in a CU/TU header and perform some basic error checking.
|
||||
The contents of the header are stored in HEADER.
|
||||
The result is a pointer to the start of the first DIE. */
|
||||
|
||||
static gdb_byte *
|
||||
partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
|
||||
gdb_byte *buffer, unsigned int buffer_size,
|
||||
bfd *abfd, int is_debug_types_section)
|
||||
read_and_check_comp_unit_head (struct comp_unit_head *header,
|
||||
struct dwarf2_section_info *section,
|
||||
gdb_byte *info_ptr,
|
||||
int is_debug_types_section)
|
||||
{
|
||||
gdb_byte *beg_of_comp_unit = info_ptr;
|
||||
bfd *abfd = section->asection->owner;
|
||||
|
||||
header->offset = beg_of_comp_unit - buffer;
|
||||
header->offset = beg_of_comp_unit - section->buffer;
|
||||
|
||||
info_ptr = read_comp_unit_head (header, info_ptr, abfd);
|
||||
|
||||
|
|
@ -2974,27 +3007,7 @@ partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
|
|||
|
||||
header->first_die_offset = info_ptr - beg_of_comp_unit;
|
||||
|
||||
if (header->version != 2 && header->version != 3 && header->version != 4)
|
||||
error (_("Dwarf Error: wrong version in compilation unit header "
|
||||
"(is %d, should be 2, 3, or 4) [in module %s]"), header->version,
|
||||
bfd_get_filename (abfd));
|
||||
|
||||
if (header->abbrev_offset
|
||||
>= dwarf2_section_size (dwarf2_per_objfile->objfile,
|
||||
&dwarf2_per_objfile->abbrev))
|
||||
error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
|
||||
"(offset 0x%lx + 6) [in module %s]"),
|
||||
(long) header->abbrev_offset,
|
||||
(long) (beg_of_comp_unit - buffer),
|
||||
bfd_get_filename (abfd));
|
||||
|
||||
if (beg_of_comp_unit + header->length + header->initial_length_size
|
||||
> buffer + buffer_size)
|
||||
error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
|
||||
"(offset 0x%lx + 0) [in module %s]"),
|
||||
(long) header->length,
|
||||
(long) (beg_of_comp_unit - buffer),
|
||||
bfd_get_filename (abfd));
|
||||
error_check_comp_unit_head (header, section);
|
||||
|
||||
return info_ptr;
|
||||
}
|
||||
|
|
@ -3003,24 +3016,32 @@ partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
|
|||
types_ptr. The result is a pointer to one past the end of the header. */
|
||||
|
||||
static gdb_byte *
|
||||
read_type_comp_unit_head (struct comp_unit_head *cu_header,
|
||||
struct dwarf2_section_info *section,
|
||||
ULONGEST *signature,
|
||||
gdb_byte *types_ptr, bfd *abfd)
|
||||
read_and_check_type_unit_head (struct comp_unit_head *header,
|
||||
struct dwarf2_section_info *section,
|
||||
gdb_byte *info_ptr,
|
||||
ULONGEST *signature, unsigned int *type_offset)
|
||||
{
|
||||
gdb_byte *initial_types_ptr = types_ptr;
|
||||
gdb_byte *beg_of_comp_unit = info_ptr;
|
||||
bfd *abfd = section->asection->owner;
|
||||
|
||||
dwarf2_read_section (dwarf2_per_objfile->objfile, section);
|
||||
cu_header->offset = types_ptr - section->buffer;
|
||||
header->offset = beg_of_comp_unit - section->buffer;
|
||||
|
||||
types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
|
||||
info_ptr = read_comp_unit_head (header, info_ptr, abfd);
|
||||
|
||||
*signature = read_8_bytes (abfd, types_ptr);
|
||||
types_ptr += 8;
|
||||
types_ptr += cu_header->offset_size;
|
||||
cu_header->first_die_offset = types_ptr - initial_types_ptr;
|
||||
/* If we're reading a type unit, skip over the signature and
|
||||
type_offset fields. */
|
||||
if (signature != NULL)
|
||||
*signature = read_8_bytes (abfd, info_ptr);
|
||||
info_ptr += 8;
|
||||
if (type_offset != NULL)
|
||||
*type_offset = read_offset_1 (abfd, info_ptr, header->offset_size);
|
||||
info_ptr += header->offset_size;
|
||||
|
||||
return types_ptr;
|
||||
header->first_die_offset = info_ptr - beg_of_comp_unit;
|
||||
|
||||
error_check_comp_unit_head (header, section);
|
||||
|
||||
return info_ptr;
|
||||
}
|
||||
|
||||
/* Allocate a new partial symtab for file named NAME and mark this new
|
||||
|
|
@ -3173,46 +3194,25 @@ create_debug_types_hash_table (struct objfile *objfile)
|
|||
while (info_ptr < end_ptr)
|
||||
{
|
||||
unsigned int offset;
|
||||
unsigned int offset_size;
|
||||
unsigned int type_offset;
|
||||
unsigned int length, initial_length_size;
|
||||
unsigned short version;
|
||||
ULONGEST signature;
|
||||
struct signatured_type *type_sig;
|
||||
void **slot;
|
||||
gdb_byte *ptr = info_ptr;
|
||||
struct comp_unit_head header;
|
||||
|
||||
offset = ptr - section->buffer;
|
||||
|
||||
/* We need to read the type's signature in order to build the hash
|
||||
table, but we don't need to read anything else just yet. */
|
||||
table, but we don't need anything else just yet. */
|
||||
|
||||
/* Sanity check to ensure entire cu is present. */
|
||||
length = read_initial_length (objfile->obfd, ptr,
|
||||
&initial_length_size);
|
||||
if (ptr + length + initial_length_size > end_ptr)
|
||||
{
|
||||
complaint (&symfile_complaints,
|
||||
_("debug type entry runs off end "
|
||||
"of `.debug_types' section, ignored"));
|
||||
break;
|
||||
}
|
||||
|
||||
offset_size = initial_length_size == 4 ? 4 : 8;
|
||||
ptr += initial_length_size;
|
||||
version = bfd_get_16 (objfile->obfd, ptr);
|
||||
ptr += 2;
|
||||
ptr += offset_size; /* abbrev offset */
|
||||
ptr += 1; /* address size */
|
||||
signature = bfd_get_64 (objfile->obfd, ptr);
|
||||
ptr += 8;
|
||||
type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
|
||||
ptr += offset_size;
|
||||
ptr = read_and_check_type_unit_head (&header, section, ptr,
|
||||
&signature, &type_offset);
|
||||
|
||||
/* Skip dummy type units. */
|
||||
if (ptr >= end_ptr || peek_abbrev_code (objfile->obfd, ptr) == 0)
|
||||
{
|
||||
info_ptr = info_ptr + initial_length_size + length;
|
||||
info_ptr = info_ptr + header.initial_length_size + header.length;
|
||||
continue;
|
||||
}
|
||||
|
||||
|
|
@ -3243,7 +3243,7 @@ create_debug_types_hash_table (struct objfile *objfile)
|
|||
fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
|
||||
offset, phex (signature, sizeof (signature)));
|
||||
|
||||
info_ptr = info_ptr + initial_length_size + length;
|
||||
info_ptr = info_ptr + header.initial_length_size + header.length;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -3377,10 +3377,8 @@ process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
|
|||
init_one_comp_unit (&cu, this_cu);
|
||||
back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
|
||||
|
||||
info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
|
||||
buffer, buffer_size,
|
||||
abfd,
|
||||
is_debug_types_section);
|
||||
info_ptr = read_and_check_comp_unit_head (&cu.header, section, info_ptr,
|
||||
is_debug_types_section);
|
||||
|
||||
/* Skip dummy compilation units. */
|
||||
if (info_ptr >= buffer + buffer_size
|
||||
|
|
@ -3606,11 +3604,12 @@ load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
|
|||
int has_children;
|
||||
struct die_reader_specs reader_specs;
|
||||
int read_cu = 0;
|
||||
struct dwarf2_section_info *section = &dwarf2_per_objfile->info;
|
||||
|
||||
gdb_assert (! this_cu->debug_types_section);
|
||||
|
||||
gdb_assert (dwarf2_per_objfile->info.readin);
|
||||
info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
|
||||
gdb_assert (section->readin);
|
||||
info_ptr = section->buffer + this_cu->offset;
|
||||
|
||||
if (this_cu->cu == NULL)
|
||||
{
|
||||
|
|
@ -3622,14 +3621,11 @@ load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
|
|||
/* If an error occurs while loading, release our storage. */
|
||||
free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
|
||||
|
||||
info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
|
||||
dwarf2_per_objfile->info.buffer,
|
||||
dwarf2_per_objfile->info.size,
|
||||
abfd, 0);
|
||||
info_ptr = read_and_check_comp_unit_head (&cu->header, section, info_ptr,
|
||||
0);
|
||||
|
||||
/* Skip dummy compilation units. */
|
||||
if (info_ptr >= (dwarf2_per_objfile->info.buffer
|
||||
+ dwarf2_per_objfile->info.size)
|
||||
if (info_ptr >= (section->buffer + section->size)
|
||||
|| peek_abbrev_code (abfd, info_ptr) == 0)
|
||||
{
|
||||
do_cleanups (free_cu_cleanup);
|
||||
|
|
@ -3662,7 +3658,7 @@ load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu)
|
|||
If so, read the rest of the partial symbols from this comp unit.
|
||||
If not, there's no more debug_info for this comp unit. */
|
||||
if (has_children)
|
||||
load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
|
||||
load_partial_dies (abfd, section->buffer, info_ptr, 0, cu);
|
||||
|
||||
do_cleanups (free_abbrevs_cleanup);
|
||||
|
||||
|
|
@ -14337,8 +14333,8 @@ read_signatured_type (struct signatured_type *type_sig)
|
|||
/* If an error occurs while loading, release our storage. */
|
||||
free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
|
||||
|
||||
types_ptr = read_type_comp_unit_head (&cu->header, section, &signature,
|
||||
types_ptr, objfile->obfd);
|
||||
types_ptr = read_and_check_type_unit_head (&cu->header, section, types_ptr,
|
||||
&signature, NULL);
|
||||
gdb_assert (signature == type_sig->signature);
|
||||
|
||||
cu->die_hash
|
||||
|
|
|
|||
Loading…
Reference in New Issue