зеркало из https://github.com/mozilla/gecko-dev.git
134 строки
3.4 KiB
C++
134 строки
3.4 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "shared-libraries.h"
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#define PATH_MAX_TOSTRING(x) #x
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#define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x)
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include <unistd.h>
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#include "platform.h"
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#include "shared-libraries.h"
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#if !defined(__GLIBC__) && ANDROID_VERSION < 18
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/* a crapy version of getline, because it's not included in old bionics */
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static ssize_t getline(char **lineptr, size_t *n, FILE *stream)
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{
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char *ret;
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if (!*lineptr) {
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*lineptr = (char*)malloc(4096);
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}
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ret = fgets(*lineptr, 4096, stream);
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if (!ret)
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return 0;
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return strlen(*lineptr);
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}
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#endif
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#if !defined(MOZ_WIDGET_GONK)
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// TODO fix me with proper include
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#include "nsDebug.h"
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#ifdef ANDROID
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#include "ElfLoader.h" // dl_phdr_info
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#else
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#include <link.h> // dl_phdr_info
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#endif
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#include <features.h>
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#include <dlfcn.h>
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#include <sys/types.h>
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#ifdef ANDROID
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extern "C" __attribute__((weak))
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int dl_iterate_phdr(
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int (*callback) (struct dl_phdr_info *info,
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size_t size, void *data),
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void *data);
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#endif
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int dl_iterate_callback(struct dl_phdr_info *dl_info, size_t size, void *data)
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{
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SharedLibraryInfo& info = *reinterpret_cast<SharedLibraryInfo*>(data);
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if (dl_info->dlpi_phnum <= 0)
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return 0;
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unsigned long libStart = -1;
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unsigned long libEnd = 0;
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for (size_t i = 0; i < dl_info->dlpi_phnum; i++) {
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if (dl_info->dlpi_phdr[i].p_type != PT_LOAD) {
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continue;
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}
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unsigned long start = dl_info->dlpi_addr + dl_info->dlpi_phdr[i].p_vaddr;
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unsigned long end = start + dl_info->dlpi_phdr[i].p_memsz;
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if (start < libStart)
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libStart = start;
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if (end > libEnd)
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libEnd = end;
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}
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SharedLibrary shlib(libStart, libEnd, 0, "", dl_info->dlpi_name);
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info.AddSharedLibrary(shlib);
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return 0;
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}
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#endif
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SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf()
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{
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SharedLibraryInfo info;
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#if !defined(MOZ_WIDGET_GONK)
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dl_iterate_phdr(dl_iterate_callback, &info);
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#ifndef ANDROID
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return info;
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#endif
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#endif
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pid_t pid = getpid();
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "/proc/%d/maps", pid);
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FILE *maps = fopen(path, "r");
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char *line = NULL;
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int count = 0;
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size_t line_size = 0;
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while (maps && getline (&line, &line_size, maps) > 0) {
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int ret;
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//XXX: needs input sanitizing
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unsigned long start;
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unsigned long end;
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char perm[6] = "";
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unsigned long offset;
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char name[PATH_MAX] = "";
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ret = sscanf(line,
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"%lx-%lx %6s %lx %*s %*x %" PATH_MAX_STRING(PATH_MAX) "s\n",
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&start, &end, perm, &offset, name);
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if (!strchr(perm, 'x')) {
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// Ignore non executable entries
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continue;
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}
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if (ret != 5 && ret != 4) {
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LOG("Get maps line failed");
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continue;
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}
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#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
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// Use proc/pid/maps to get the dalvik-jit section since it has
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// no associated phdrs
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if (strcmp(name, "/dev/ashmem/dalvik-jit-code-cache") != 0)
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continue;
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#endif
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SharedLibrary shlib(start, end, offset, "", name);
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info.AddSharedLibrary(shlib);
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if (count > 10000) {
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LOG("Get maps failed");
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break;
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}
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count++;
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}
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free(line);
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return info;
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}
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