hotspot/src/jdk.hotspot.agent/macosx/native/libsaproc/symtab.c
author dsamersoff
Wed, 23 Dec 2015 13:12:15 +0300
changeset 35217 ce4b5303a813
parent 16351 hotspot/agent/src/os/bsd/symtab.c@032b310a3e2f
permissions -rw-r--r--
8067194: Restructure hotspot/agent/src to conform the modular source layout Summary: Move sources under jdk.hotspot.agent Reviewed-by: ihse, erikj, jbachorik
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/*
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 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include <unistd.h>
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#include <search.h>
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#include <stdlib.h>
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#include <string.h>
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#include <db.h>
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#include <fcntl.h>
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#include "libproc_impl.h"
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#include "symtab.h"
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#ifndef __APPLE__
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#include "salibelf.h"
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#endif // __APPLE__
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// ----------------------------------------------------
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// functions for symbol lookups
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// ----------------------------------------------------
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typedef struct symtab_symbol {
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  char *name;                // name like __ZThread_...
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  uintptr_t offset;          // to loaded address
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  uintptr_t size;            // size strlen
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} symtab_symbol;
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typedef struct symtab {
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  char *strs;                // all symbols "__symbol1__'\0'__symbol2__...."
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  size_t num_symbols;
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  DB* hash_table;
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  symtab_symbol* symbols;
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} symtab_t;
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#ifdef __APPLE__
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void build_search_table(symtab_t *symtab) {
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  int i;
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  for (i = 0; i < symtab->num_symbols; i++) {
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    DBT key, value;
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    key.data = symtab->symbols[i].name;
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    key.size = strlen(key.data) + 1;
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    value.data = &(symtab->symbols[i]);
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    value.size = sizeof(symtab_symbol);
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    (*symtab->hash_table->put)(symtab->hash_table, &key, &value, 0);
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    // check result
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    if (is_debug()) {
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      DBT rkey, rvalue;
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      char* tmp = (char *)malloc(strlen(symtab->symbols[i].name) + 1);
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      strcpy(tmp, symtab->symbols[i].name);
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      rkey.data = tmp;
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      rkey.size = strlen(tmp) + 1;
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      (*symtab->hash_table->get)(symtab->hash_table, &rkey, &rvalue, 0);
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      // we may get a copy back so compare contents
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      symtab_symbol *res = (symtab_symbol *)rvalue.data;
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      if (strcmp(res->name, symtab->symbols[i].name)  ||
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          res->offset != symtab->symbols[i].offset    ||
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          res->size != symtab->symbols[i].size) {
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        print_debug("error to get hash_table value!\n");
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      }
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      free(tmp);
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    }
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  }
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}
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// read symbol table from given fd.
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struct symtab* build_symtab(int fd) {
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  symtab_t* symtab = NULL;
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  int i;
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  mach_header_64 header;
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  off_t image_start;
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  if (!get_arch_off(fd, CPU_TYPE_X86_64, &image_start)) {
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    print_debug("failed in get fat header\n");
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    return NULL;
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  }
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  lseek(fd, image_start, SEEK_SET);
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  if (read(fd, (void *)&header, sizeof(mach_header_64)) != sizeof(mach_header_64)) {
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    print_debug("reading header failed!\n");
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    return NULL;
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  }
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  // header
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  if (header.magic != MH_MAGIC_64) {
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    print_debug("not a valid .dylib file\n");
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    return NULL;
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  }
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  load_command lcmd;
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  symtab_command symtabcmd;
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  nlist_64 lentry;
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  bool lcsymtab_exist = false;
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  long filepos = ltell(fd);
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  for (i = 0; i < header.ncmds; i++) {
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    lseek(fd, filepos, SEEK_SET);
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    if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) {
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      print_debug("read load_command failed for file\n");
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      return NULL;
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    }
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    filepos += lcmd.cmdsize;  // next command position
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    if (lcmd.cmd == LC_SYMTAB) {
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      lseek(fd, -sizeof(load_command), SEEK_CUR);
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      lcsymtab_exist = true;
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      break;
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    }
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  }
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  if (!lcsymtab_exist) {
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    print_debug("No symtab command found!\n");
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    return NULL;
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  }
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  if (read(fd, (void *)&symtabcmd, sizeof(symtab_command)) != sizeof(symtab_command)) {
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    print_debug("read symtab_command failed for file");
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    return NULL;
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  }
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  symtab = (symtab_t *)malloc(sizeof(symtab_t));
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  if (symtab == NULL) {
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    print_debug("out of memory: allocating symtab\n");
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    return NULL;
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  }
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  // create hash table, we use berkeley db to
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  // manipulate the hash table.
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  symtab->hash_table = dbopen(NULL, O_CREAT | O_RDWR, 0600, DB_HASH, NULL);
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  if (symtab->hash_table == NULL)
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    goto quit;
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  symtab->num_symbols = symtabcmd.nsyms;
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  symtab->symbols = (symtab_symbol *)malloc(sizeof(symtab_symbol) * symtab->num_symbols);
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  symtab->strs    = (char *)malloc(sizeof(char) * symtabcmd.strsize);
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  if (symtab->symbols == NULL || symtab->strs == NULL) {
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     print_debug("out of memory: allocating symtab.symbol or symtab.strs\n");
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     goto quit;
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   156
  }
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   157
  lseek(fd, image_start + symtabcmd.symoff, SEEK_SET);
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   158
  for (i = 0; i < symtab->num_symbols; i++) {
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   159
    if (read(fd, (void *)&lentry, sizeof(nlist_64)) != sizeof(nlist_64)) {
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   160
      print_debug("read nlist_64 failed at %i\n", i);
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   161
      goto quit;
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   162
    }
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   163
    symtab->symbols[i].offset = lentry.n_value;
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   164
    symtab->symbols[i].size  = lentry.n_un.n_strx;        // index
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   165
  }
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   166
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   167
  // string table
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   168
  lseek(fd, image_start + symtabcmd.stroff, SEEK_SET);
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   169
  int size = read(fd, (void *)(symtab->strs), symtabcmd.strsize * sizeof(char));
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   170
  if (size != symtabcmd.strsize * sizeof(char)) {
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   171
     print_debug("reading string table failed\n");
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   172
     goto quit;
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   173
  }
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   174
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   175
  for (i = 0; i < symtab->num_symbols; i++) {
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   176
    symtab->symbols[i].name = symtab->strs + symtab->symbols[i].size;
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   177
    if (i > 0) {
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   178
      // fix size
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   179
      symtab->symbols[i - 1].size = symtab->symbols[i].size - symtab->symbols[i - 1].size;
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   180
      print_debug("%s size = %d\n", symtab->symbols[i - 1].name, symtab->symbols[i - 1].size);
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diff changeset
   181
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   182
    }
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   183
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   184
    if (i == symtab->num_symbols - 1) {
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   185
      // last index
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   186
      symtab->symbols[i].size =
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   187
            symtabcmd.strsize - symtab->symbols[i].size;
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   188
      print_debug("%s size = %d\n", symtab->symbols[i].name, symtab->symbols[i].size);
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diff changeset
   189
    }
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diff changeset
   190
  }
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diff changeset
   191
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   192
  // build a hashtable for fast query
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   193
  build_search_table(symtab);
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   194
  return symtab;
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   195
quit:
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diff changeset
   196
  if (symtab) destroy_symtab(symtab);
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   197
  return NULL;
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diff changeset
   198
}
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diff changeset
   199
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   200
#else // __APPLE__
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   201
10565
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   202
struct elf_section {
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   203
  ELF_SHDR   *c_shdr;
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   204
  void       *c_data;
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   205
};
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   206
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   207
// read symbol table from given fd.
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diff changeset
   208
struct symtab* build_symtab(int fd) {
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parents:
diff changeset
   209
  ELF_EHDR ehdr;
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   210
  struct symtab* symtab = NULL;
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diff changeset
   211
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parents:
diff changeset
   212
  // Reading of elf header
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diff changeset
   213
  struct elf_section *scn_cache = NULL;
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diff changeset
   214
  int cnt = 0;
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diff changeset
   215
  ELF_SHDR* shbuf = NULL;
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parents:
diff changeset
   216
  ELF_SHDR* cursct = NULL;
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diff changeset
   217
  ELF_PHDR* phbuf = NULL;
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parents:
diff changeset
   218
  int symtab_found = 0;
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parents:
diff changeset
   219
  int dynsym_found = 0;
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parents:
diff changeset
   220
  uint32_t symsection = SHT_SYMTAB;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   221
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   222
  uintptr_t baseaddr = (uintptr_t)-1;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   223
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   224
  lseek(fd, (off_t)0L, SEEK_SET);
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parents:
diff changeset
   225
  if (! read_elf_header(fd, &ehdr)) {
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parents:
diff changeset
   226
    // not an elf
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parents:
diff changeset
   227
    return NULL;
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parents:
diff changeset
   228
  }
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   229
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   230
  // read ELF header
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parents:
diff changeset
   231
  if ((shbuf = read_section_header_table(fd, &ehdr)) == NULL) {
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   232
    goto quit;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   233
  }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   234
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   235
  baseaddr = find_base_address(fd, &ehdr);
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   236
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   237
  scn_cache = calloc(ehdr.e_shnum, sizeof(*scn_cache));
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   238
  if (scn_cache == NULL) {
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   239
    goto quit;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   240
  }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   241
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   242
  for (cursct = shbuf, cnt = 0; cnt < ehdr.e_shnum; cnt++) {
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   243
    scn_cache[cnt].c_shdr = cursct;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   244
    if (cursct->sh_type == SHT_SYMTAB ||
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   245
        cursct->sh_type == SHT_STRTAB ||
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   246
        cursct->sh_type == SHT_DYNSYM) {
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   247
      if ( (scn_cache[cnt].c_data = read_section_data(fd, &ehdr, cursct)) == NULL) {
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   248
         goto quit;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   249
      }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   250
    }
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   251
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   252
    if (cursct->sh_type == SHT_SYMTAB)
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   253
       symtab_found++;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   254
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   255
    if (cursct->sh_type == SHT_DYNSYM)
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   256
       dynsym_found++;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   257
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   258
    cursct++;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   259
  }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   260
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   261
  if (!symtab_found && dynsym_found)
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   262
     symsection = SHT_DYNSYM;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   263
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   264
  for (cnt = 1; cnt < ehdr.e_shnum; cnt++) {
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   265
    ELF_SHDR *shdr = scn_cache[cnt].c_shdr;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   266
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   267
    if (shdr->sh_type == symsection) {
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   268
      ELF_SYM  *syms;
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   269
      int j, n;
10565
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diff changeset
   270
      size_t size;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   271
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   272
      // FIXME: there could be multiple data buffers associated with the
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   273
      // same ELF section. Here we can handle only one buffer. See man page
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parents:
diff changeset
   274
      // for elf_getdata on Solaris.
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parents:
diff changeset
   275
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   276
      // guarantee(symtab == NULL, "multiple symtab");
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   277
      symtab = calloc(1, sizeof(*symtab));
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   278
      if (symtab == NULL) {
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   279
         goto quit;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   280
      }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   281
      // the symbol table
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diff changeset
   282
      syms = (ELF_SYM *)scn_cache[cnt].c_data;
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parents:
diff changeset
   283
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   284
      // number of symbols
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parents:
diff changeset
   285
      n = shdr->sh_size / shdr->sh_entsize;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   286
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parents:
diff changeset
   287
      // create hash table, we use berkeley db to
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parents:
diff changeset
   288
      // manipulate the hash table.
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diff changeset
   289
      symtab->hash_table = dbopen(NULL, O_CREAT | O_RDWR, 0600, DB_HASH, NULL);
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parents:
diff changeset
   290
      // guarantee(symtab->hash_table, "unexpected failure: dbopen");
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   291
      if (symtab->hash_table == NULL)
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   292
        goto bad;
10565
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   293
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   294
      // shdr->sh_link points to the section that contains the actual strings
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parents:
diff changeset
   295
      // for symbol names. the st_name field in ELF_SYM is just the
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parents:
diff changeset
   296
      // string table index. we make a copy of the string table so the
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parents:
diff changeset
   297
      // strings will not be destroyed by elf_end.
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diff changeset
   298
      size = scn_cache[shdr->sh_link].c_shdr->sh_size;
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parents:
diff changeset
   299
      symtab->strs = malloc(size);
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
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diff changeset
   300
      if (symtab->strs == NULL)
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parents: 10565
diff changeset
   301
        goto bad;
10565
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   302
      memcpy(symtab->strs, scn_cache[shdr->sh_link].c_data, size);
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parents:
diff changeset
   303
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parents:
diff changeset
   304
      // allocate memory for storing symbol offset and size;
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parents:
diff changeset
   305
      symtab->num_symbols = n;
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parents:
diff changeset
   306
      symtab->symbols = calloc(n , sizeof(*symtab->symbols));
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   307
      if (symtab->symbols == NULL)
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   308
        goto bad;
10565
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   309
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   310
      // copy symbols info our symtab and enter them info the hash table
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never
parents:
diff changeset
   311
      for (j = 0; j < n; j++, syms++) {
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parents:
diff changeset
   312
        DBT key, value;
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   313
        char *sym_name = symtab->strs + syms->st_name;
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parents:
diff changeset
   314
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   315
        // skip non-object and non-function symbols
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parents:
diff changeset
   316
        int st_type = ELF_ST_TYPE(syms->st_info);
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parents:
diff changeset
   317
        if ( st_type != STT_FUNC && st_type != STT_OBJECT)
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parents:
diff changeset
   318
           continue;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   319
        // skip empty strings and undefined symbols
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   320
        if (*sym_name == '\0' || syms->st_shndx == SHN_UNDEF) continue;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   321
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   322
        symtab->symbols[j].name   = sym_name;
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   323
        symtab->symbols[j].offset = syms->st_value - baseaddr;
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   324
        symtab->symbols[j].size   = syms->st_size;
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   325
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   326
        key.data = sym_name;
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   327
        key.size = strlen(sym_name) + 1;
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   328
        value.data = &(symtab->symbols[j]);
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   329
        value.size = sizeof(symtab_symbol);
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   330
        (*symtab->hash_table->put)(symtab->hash_table, &key, &value, 0);
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   331
      }
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   332
    }
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   333
  }
10739
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   334
  goto quit;
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   335
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   336
bad:
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   337
  destroy_symtab(symtab);
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   338
  symtab = NULL;
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   339
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   340
quit:
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parents:
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   341
  if (shbuf) free(shbuf);
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parents:
diff changeset
   342
  if (phbuf) free(phbuf);
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diff changeset
   343
  if (scn_cache) {
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   344
    for (cnt = 0; cnt < ehdr.e_shnum; cnt++) {
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   345
      if (scn_cache[cnt].c_data != NULL) {
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   346
        free(scn_cache[cnt].c_data);
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   347
      }
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   348
    }
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   349
    free(scn_cache);
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   350
  }
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   351
  return symtab;
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   352
}
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   353
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   354
#endif // __APPLE__
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   355
032b310a3e2f 8003348: SA can not read core file on OS
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   356
void destroy_symtab(symtab_t* symtab) {
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   357
  if (!symtab) return;
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   358
  free(symtab->strs);
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   359
  free(symtab->symbols);
10565
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   360
  free(symtab);
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diff changeset
   361
}
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diff changeset
   362
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   363
uintptr_t search_symbol(struct symtab* symtab, uintptr_t base, const char *sym_name, int *sym_size) {
10565
dc90c239f4ec 7089790: integrate bsd-port changes
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   364
  DBT key, value;
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diff changeset
   365
  int ret;
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diff changeset
   366
dc90c239f4ec 7089790: integrate bsd-port changes
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   367
  // library does not have symbol table
16351
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diff changeset
   368
  if (!symtab || !symtab->hash_table) {
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   369
     return 0;
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   370
  }
10565
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parents:
diff changeset
   371
dc90c239f4ec 7089790: integrate bsd-port changes
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   372
  key.data = (char*)(uintptr_t)sym_name;
dc90c239f4ec 7089790: integrate bsd-port changes
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   373
  key.size = strlen(sym_name) + 1;
dc90c239f4ec 7089790: integrate bsd-port changes
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   374
  ret = (*symtab->hash_table->get)(symtab->hash_table, &key, &value, 0);
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   375
  if (ret == 0) {
16351
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   376
    symtab_symbol *sym = value.data;
10565
dc90c239f4ec 7089790: integrate bsd-port changes
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diff changeset
   377
    uintptr_t rslt = (uintptr_t) ((char*)base + sym->offset);
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   378
    if (sym_size) *sym_size = sym->size;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   379
    return rslt;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   380
  }
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   381
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   382
  return 0;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   383
}
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   384
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   385
const char* nearest_symbol(struct symtab* symtab, uintptr_t offset,
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   386
                           uintptr_t* poffset) {
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   387
  int n = 0;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   388
  if (!symtab) return NULL;
dc90c239f4ec 7089790: integrate bsd-port changes
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parents:
diff changeset
   389
  for (; n < symtab->num_symbols; n++) {
16351
032b310a3e2f 8003348: SA can not read core file on OS
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parents: 10739
diff changeset
   390
    symtab_symbol* sym = &(symtab->symbols[n]);
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   391
    if (sym->name != NULL &&
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   392
      offset >= sym->offset && offset < sym->offset + sym->size) {
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   393
      if (poffset) *poffset = (offset - sym->offset);
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   394
      return sym->name;
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 10565
diff changeset
   395
    }
10565
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   396
  }
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   397
  return NULL;
dc90c239f4ec 7089790: integrate bsd-port changes
never
parents:
diff changeset
   398
}