mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-13 18:27:35 +00:00
239 lines
6.6 KiB
C++
239 lines
6.6 KiB
C++
// vim:ts=8:sw=2:et:
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape Communications Corp.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "leaky.h"
|
|
|
|
#ifdef USE_BFD
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <libgen.h>
|
|
#include <bfd.h>
|
|
|
|
extern "C" {
|
|
char *cplus_demangle (const char *mangled, int options);
|
|
}
|
|
|
|
static bfd *try_debug_file(const char *filename, unsigned long crc32)
|
|
{
|
|
int fd = open(filename, O_RDONLY);
|
|
if (fd < 0)
|
|
return NULL;
|
|
|
|
unsigned char buf[4*1024];
|
|
unsigned long crc = 0;
|
|
|
|
while (1) {
|
|
ssize_t count = read(fd, buf, sizeof(buf));
|
|
if (count <= 0)
|
|
break;
|
|
|
|
crc = bfd_calc_gnu_debuglink_crc32(crc, buf, count);
|
|
}
|
|
|
|
close(fd);
|
|
|
|
if (crc != crc32)
|
|
return NULL;
|
|
|
|
bfd *object = bfd_openr(filename, NULL);
|
|
if (!bfd_check_format(object, bfd_object)) {
|
|
bfd_close(object);
|
|
return NULL;
|
|
}
|
|
|
|
return object;
|
|
}
|
|
|
|
static bfd *find_debug_file(bfd *lib, const char *aFileName)
|
|
{
|
|
// check for a separate debug file with symbols
|
|
asection *sect = bfd_get_section_by_name(lib, ".gnu_debuglink");
|
|
|
|
if (!sect)
|
|
return NULL;
|
|
|
|
bfd_size_type debuglinkSize = bfd_section_size (objfile->obfd, sect);
|
|
|
|
char *debuglink = new char[debuglinkSize];
|
|
bfd_get_section_contents(lib, sect, debuglink, 0, debuglinkSize);
|
|
|
|
// crc checksum is aligned to 4 bytes, and after the NUL.
|
|
int crc_offset = (int(strlen(debuglink)) & ~3) + 4;
|
|
unsigned long crc32 = bfd_get_32(lib, debuglink + crc_offset);
|
|
|
|
// directory component
|
|
char *dirbuf = strdup(aFileName);
|
|
const char *dir = dirname(dirbuf);
|
|
|
|
static const char debug_subdir[] = ".debug";
|
|
// This is gdb's default global debugging info directory, but gdb can
|
|
// be instructed to use a different directory.
|
|
static const char global_debug_dir[] = "/usr/lib/debug";
|
|
|
|
char *filename =
|
|
new char[strlen(global_debug_dir) + strlen(dir) + crc_offset + 3];
|
|
|
|
// /path/debuglink
|
|
sprintf(filename, "%s/%s", dir, debuglink);
|
|
bfd *debugFile = try_debug_file(filename, crc32);
|
|
if (!debugFile) {
|
|
|
|
// /path/.debug/debuglink
|
|
sprintf(filename, "%s/%s/%s", dir, debug_subdir, debuglink);
|
|
debugFile = try_debug_file(filename, crc32);
|
|
if (!debugFile) {
|
|
|
|
// /usr/lib/debug/path/debuglink
|
|
sprintf(filename, "%s/%s/%s", global_debug_dir, dir, debuglink);
|
|
debugFile = try_debug_file(filename, crc32);
|
|
}
|
|
}
|
|
|
|
delete[] filename;
|
|
free(dirbuf);
|
|
delete[] debuglink;
|
|
|
|
return debugFile;
|
|
}
|
|
|
|
#define NEXT_SYMBOL \
|
|
sp++; \
|
|
if (sp >= lastSymbol) { \
|
|
long n = numExternalSymbols + 10000; \
|
|
externalSymbols = (Symbol*) \
|
|
realloc(externalSymbols, (size_t) (sizeof(Symbol) * n)); \
|
|
lastSymbol = externalSymbols + n; \
|
|
sp = externalSymbols + numExternalSymbols; \
|
|
numExternalSymbols = n; \
|
|
}
|
|
|
|
void leaky::ReadSymbols(const char *aFileName, u_long aBaseAddress)
|
|
{
|
|
int initialSymbols = usefulSymbols;
|
|
if (NULL == externalSymbols) {
|
|
externalSymbols = (Symbol*) malloc(sizeof(Symbol) * 10000);
|
|
numExternalSymbols = 10000;
|
|
}
|
|
Symbol* sp = externalSymbols + usefulSymbols;
|
|
Symbol* lastSymbol = externalSymbols + numExternalSymbols;
|
|
|
|
// Create a dummy symbol for the library so, if it doesn't have any
|
|
// symbols, we show it by library.
|
|
sp->Init(aFileName, aBaseAddress);
|
|
NEXT_SYMBOL
|
|
|
|
bfd_boolean kDynamic = (bfd_boolean) false;
|
|
|
|
static int firstTime = 1;
|
|
if (firstTime) {
|
|
firstTime = 0;
|
|
bfd_init ();
|
|
}
|
|
|
|
bfd* lib = bfd_openr(aFileName, NULL);
|
|
if (NULL == lib) {
|
|
return;
|
|
}
|
|
if (!bfd_check_format(lib, bfd_object)) {
|
|
bfd_close(lib);
|
|
return;
|
|
}
|
|
|
|
bfd *symbolFile = find_debug_file(lib, aFileName);
|
|
|
|
// read mini symbols
|
|
PTR minisyms;
|
|
unsigned int size;
|
|
long symcount = 0;
|
|
|
|
if (symbolFile) {
|
|
symcount = bfd_read_minisymbols(symbolFile, kDynamic, &minisyms, &size);
|
|
if (symcount == 0) {
|
|
bfd_close(symbolFile);
|
|
} else {
|
|
bfd_close(lib);
|
|
}
|
|
}
|
|
if (symcount == 0) {
|
|
symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size);
|
|
if (symcount == 0) {
|
|
// symtab is empty; try dynamic symbols
|
|
kDynamic = (bfd_boolean) true;
|
|
symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size);
|
|
}
|
|
symbolFile = lib;
|
|
}
|
|
|
|
asymbol* store;
|
|
store = bfd_make_empty_symbol(symbolFile);
|
|
|
|
// Scan symbols
|
|
bfd_byte* from = (bfd_byte *) minisyms;
|
|
bfd_byte* fromend = from + symcount * size;
|
|
for (; from < fromend; from += size) {
|
|
asymbol *sym;
|
|
sym = bfd_minisymbol_to_symbol(symbolFile, kDynamic, (const PTR) from, store);
|
|
|
|
symbol_info syminfo;
|
|
bfd_get_symbol_info (symbolFile, sym, &syminfo);
|
|
|
|
// if ((syminfo.type == 'T') || (syminfo.type == 't')) {
|
|
const char* nm = bfd_asymbol_name(sym);
|
|
if (nm && nm[0]) {
|
|
char* dnm = NULL;
|
|
if (strncmp("__thunk", nm, 7)) {
|
|
dnm = cplus_demangle(nm, 1);
|
|
}
|
|
sp->Init(dnm ? dnm : nm, syminfo.value + aBaseAddress);
|
|
NEXT_SYMBOL
|
|
}
|
|
// }
|
|
}
|
|
|
|
bfd_close(symbolFile);
|
|
|
|
int interesting = sp - externalSymbols;
|
|
if (!quiet) {
|
|
printf("%s provided %d symbols\n", aFileName,
|
|
interesting - initialSymbols);
|
|
}
|
|
usefulSymbols = interesting;
|
|
}
|
|
|
|
#endif /* USE_BFD */
|