tools/profiler/shared-libraries-linux.cc@b8a032363ba2 (annotated)
tools/profiler/shared-libraries-linux.cc
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #include "shared-libraries.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #define PATH_MAX_TOSTRING(x) #x |
| michael@0 | 8 | #define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x) |
| michael@0 | 9 | #include <stdlib.h> |
| michael@0 | 10 | #include <stdio.h> |
| michael@0 | 11 | #include <string.h> |
| michael@0 | 12 | #include <limits.h> |
| michael@0 | 13 | #include <unistd.h> |
| michael@0 | 14 | #include <fstream> |
| michael@0 | 15 | #include "platform.h" |
| michael@0 | 16 | #include "shared-libraries.h" |
| michael@0 | 17 | |
| michael@0 | 18 | #if !defined(MOZ_WIDGET_GONK) |
| michael@0 | 19 | // TODO fix me with proper include |
| michael@0 | 20 | #include "nsDebug.h" |
| michael@0 | 21 | #ifdef ANDROID |
| michael@0 | 22 | #include "ElfLoader.h" // dl_phdr_info |
| michael@0 | 23 | #else |
| michael@0 | 24 | #include <link.h> // dl_phdr_info |
| michael@0 | 25 | #endif |
| michael@0 | 26 | #include <features.h> |
| michael@0 | 27 | #include <dlfcn.h> |
| michael@0 | 28 | #include <sys/types.h> |
| michael@0 | 29 | |
| michael@0 | 30 | #ifdef ANDROID |
| michael@0 | 31 | extern "C" __attribute__((weak)) |
| michael@0 | 32 | int dl_iterate_phdr( |
| michael@0 | 33 | int (*callback) (struct dl_phdr_info *info, |
| michael@0 | 34 | size_t size, void *data), |
| michael@0 | 35 | void *data); |
| michael@0 | 36 | #endif |
| michael@0 | 37 | |
| michael@0 | 38 | int dl_iterate_callback(struct dl_phdr_info *dl_info, size_t size, void *data) |
| michael@0 | 39 | { |
| michael@0 | 40 | SharedLibraryInfo& info = *reinterpret_cast<SharedLibraryInfo*>(data); |
| michael@0 | 41 | |
| michael@0 | 42 | if (dl_info->dlpi_phnum <= 0) |
| michael@0 | 43 | return 0; |
| michael@0 | 44 | |
| michael@0 | 45 | unsigned long libStart = -1; |
| michael@0 | 46 | unsigned long libEnd = 0; |
| michael@0 | 47 | |
| michael@0 | 48 | for (size_t i = 0; i < dl_info->dlpi_phnum; i++) { |
| michael@0 | 49 | if (dl_info->dlpi_phdr[i].p_type != PT_LOAD) { |
| michael@0 | 50 | continue; |
| michael@0 | 51 | } |
| michael@0 | 52 | unsigned long start = dl_info->dlpi_addr + dl_info->dlpi_phdr[i].p_vaddr; |
| michael@0 | 53 | unsigned long end = start + dl_info->dlpi_phdr[i].p_memsz; |
| michael@0 | 54 | if (start < libStart) |
| michael@0 | 55 | libStart = start; |
| michael@0 | 56 | if (end > libEnd) |
| michael@0 | 57 | libEnd = end; |
| michael@0 | 58 | } |
| michael@0 | 59 | SharedLibrary shlib(libStart, libEnd, 0, "", dl_info->dlpi_name); |
| michael@0 | 60 | info.AddSharedLibrary(shlib); |
| michael@0 | 61 | |
| michael@0 | 62 | return 0; |
| michael@0 | 63 | } |
| michael@0 | 64 | #endif |
| michael@0 | 65 | |
| michael@0 | 66 | SharedLibraryInfo SharedLibraryInfo::GetInfoForSelf() |
| michael@0 | 67 | { |
| michael@0 | 68 | SharedLibraryInfo info; |
| michael@0 | 69 | |
| michael@0 | 70 | #if !defined(MOZ_WIDGET_GONK) |
| michael@0 | 71 | dl_iterate_phdr(dl_iterate_callback, &info); |
| michael@0 | 72 | #ifndef ANDROID |
| michael@0 | 73 | return info; |
| michael@0 | 74 | #endif |
| michael@0 | 75 | #endif |
| michael@0 | 76 | |
| michael@0 | 77 | pid_t pid = getpid(); |
| michael@0 | 78 | char path[PATH_MAX]; |
| michael@0 | 79 | snprintf(path, PATH_MAX, "/proc/%d/maps", pid); |
| michael@0 | 80 | std::ifstream maps(path); |
| michael@0 | 81 | std::string line; |
| michael@0 | 82 | int count = 0; |
| michael@0 | 83 | while (std::getline(maps, line)) { |
| michael@0 | 84 | int ret; |
| michael@0 | 85 | //XXX: needs input sanitizing |
| michael@0 | 86 | unsigned long start; |
| michael@0 | 87 | unsigned long end; |
| michael@0 | 88 | char perm[6] = ""; |
| michael@0 | 89 | unsigned long offset; |
| michael@0 | 90 | char name[PATH_MAX] = ""; |
| michael@0 | 91 | ret = sscanf(line.c_str(), |
| michael@0 | 92 | "%lx-%lx %6s %lx %*s %*x %" PATH_MAX_STRING(PATH_MAX) "s\n", |
| michael@0 | 93 | &start, &end, perm, &offset, name); |
| michael@0 | 94 | if (!strchr(perm, 'x')) { |
| michael@0 | 95 | // Ignore non executable entries |
| michael@0 | 96 | continue; |
| michael@0 | 97 | } |
| michael@0 | 98 | if (ret != 5 && ret != 4) { |
| michael@0 | 99 | LOG("Get maps line failed"); |
| michael@0 | 100 | continue; |
| michael@0 | 101 | } |
| michael@0 | 102 | #if defined(ANDROID) && !defined(MOZ_WIDGET_GONK) |
| michael@0 | 103 | // Use proc/pid/maps to get the dalvik-jit section since it has |
| michael@0 | 104 | // no associated phdrs |
| michael@0 | 105 | if (strcmp(name, "/dev/ashmem/dalvik-jit-code-cache") != 0) |
| michael@0 | 106 | continue; |
| michael@0 | 107 | #else |
| michael@0 | 108 | if (strcmp(perm, "r-xp") != 0) { |
| michael@0 | 109 | // Ignore entries that are writable and/or shared. |
| michael@0 | 110 | // At least one graphics driver uses short-lived "rwxs" mappings |
| michael@0 | 111 | // (see bug 926734 comment 5), so just checking for 'x' isn't enough. |
| michael@0 | 112 | continue; |
| michael@0 | 113 | } |
| michael@0 | 114 | #endif |
| michael@0 | 115 | SharedLibrary shlib(start, end, offset, "", name); |
| michael@0 | 116 | info.AddSharedLibrary(shlib); |
| michael@0 | 117 | if (count > 10000) { |
| michael@0 | 118 | LOG("Get maps failed"); |
| michael@0 | 119 | break; |
| michael@0 | 120 | } |
| michael@0 | 121 | count++; |
| michael@0 | 122 | } |
| michael@0 | 123 | return info; |
| michael@0 | 124 | } |
