1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/tools/profiler/shared-libraries-linux.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,124 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "shared-libraries.h"
1.9 +
1.10 +#define PATH_MAX_TOSTRING(x) #x
1.11 +#define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x)
1.12 +#include <stdlib.h>
1.13 +#include <stdio.h>
1.14 +#include <string.h>
1.15 +#include <limits.h>
1.16 +#include <unistd.h>
1.17 +#include <fstream>
1.18 +#include "platform.h"
1.19 +#include "shared-libraries.h"
1.20 +
1.21 +#if !defined(MOZ_WIDGET_GONK)
1.22 +// TODO fix me with proper include
1.23 +#include "nsDebug.h"
1.24 +#ifdef ANDROID
1.25 +#include "ElfLoader.h" // dl_phdr_info
1.26 +#else
1.27 +#include <link.h> // dl_phdr_info
1.28 +#endif
1.29 +#include <features.h>
1.30 +#include <dlfcn.h>
1.31 +#include <sys/types.h>
1.32 +
1.33 +#ifdef ANDROID
1.34 +extern "C" __attribute__((weak))
1.35 +int dl_iterate_phdr(
1.36 + int (*callback) (struct dl_phdr_info *info,
1.37 + size_t size, void *data),
1.38 + void *data);
1.39 +#endif
1.40 +
1.41 +int dl_iterate_callback(struct dl_phdr_info *dl_info, size_t size, void *data)
1.42 +{
1.43 + SharedLibraryInfo& info = *reinterpret_cast<SharedLibraryInfo*>(data);
1.44 +
1.45 + if (dl_info->dlpi_phnum <= 0)
1.46 + return 0;
1.47 +
1.48 + unsigned long libStart = -1;
1.49 + unsigned long libEnd = 0;
1.50 +
1.51 + for (size_t i = 0; i < dl_info->dlpi_phnum; i++) {
1.52 + if (dl_info->dlpi_phdr[i].p_type != PT_LOAD) {
1.53 + continue;
1.54 + }
1.55 + unsigned long start = dl_info->dlpi_addr + dl_info->dlpi_phdr[i].p_vaddr;
1.56 + unsigned long end = start + dl_info->dlpi_phdr[i].p_memsz;
1.57 + if (start < libStart)
1.58 + libStart = start;
1.59 + if (end > libEnd)
1.60 + libEnd = end;
1.61 + }
1.62 + SharedLibrary shlib(libStart, libEnd, 0, "", dl_info->dlpi_name);
1.63 + info.AddSharedLibrary(shlib);
1.64 +
1.65 + return 0;
1.66 +}
1.67 +#endif
1.68 +
1.69 +SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf()
1.70 +{
1.71 + SharedLibraryInfo info;
1.72 +
1.73 +#if !defined(MOZ_WIDGET_GONK)
1.74 + dl_iterate_phdr(dl_iterate_callback, &info);
1.75 +#ifndef ANDROID
1.76 + return info;
1.77 +#endif
1.78 +#endif
1.79 +
1.80 + pid_t pid = getpid();
1.81 + char path[PATH_MAX];
1.82 + snprintf(path, PATH_MAX, "/proc/%d/maps", pid);
1.83 + std::ifstream maps(path);
1.84 + std::string line;
1.85 + int count = 0;
1.86 + while (std::getline(maps, line)) {
1.87 + int ret;
1.88 + //XXX: needs input sanitizing
1.89 + unsigned long start;
1.90 + unsigned long end;
1.91 + char perm[6] = "";
1.92 + unsigned long offset;
1.93 + char name[PATH_MAX] = "";
1.94 + ret = sscanf(line.c_str(),
1.95 + "%lx-%lx %6s %lx %*s %*x %" PATH_MAX_STRING(PATH_MAX) "s\n",
1.96 + &start, &end, perm, &offset, name);
1.97 + if (!strchr(perm, 'x')) {
1.98 + // Ignore non executable entries
1.99 + continue;
1.100 + }
1.101 + if (ret != 5 && ret != 4) {
1.102 + LOG("Get maps line failed");
1.103 + continue;
1.104 + }
1.105 +#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
1.106 + // Use proc/pid/maps to get the dalvik-jit section since it has
1.107 + // no associated phdrs
1.108 + if (strcmp(name, "/dev/ashmem/dalvik-jit-code-cache") != 0)
1.109 + continue;
1.110 +#else
1.111 + if (strcmp(perm, "r-xp") != 0) {
1.112 + // Ignore entries that are writable and/or shared.
1.113 + // At least one graphics driver uses short-lived "rwxs" mappings
1.114 + // (see bug 926734 comment 5), so just checking for 'x' isn't enough.
1.115 + continue;
1.116 + }
1.117 +#endif
1.118 + SharedLibrary shlib(start, end, offset, "", name);
1.119 + info.AddSharedLibrary(shlib);
1.120 + if (count > 10000) {
1.121 + LOG("Get maps failed");
1.122 + break;
1.123 + }
1.124 + count++;
1.125 + }
1.126 + return info;
1.127 +}
