diff options
Diffstat (limited to 'libsanitizer/sanitizer_common/sanitizer_symbolizer_linux.cc')
| -rw-r--r-- | libsanitizer/sanitizer_common/sanitizer_symbolizer_linux.cc | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/libsanitizer/sanitizer_common/sanitizer_symbolizer_linux.cc b/libsanitizer/sanitizer_common/sanitizer_symbolizer_linux.cc deleted file mode 100644 index 01f1e45..0000000 --- a/libsanitizer/sanitizer_common/sanitizer_symbolizer_linux.cc +++ /dev/null @@ -1,180 +0,0 @@ -//===-- sanitizer_symbolizer_linux.cc -------------------------------------===// -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file is shared between AddressSanitizer and ThreadSanitizer -// run-time libraries. -// Linux-specific implementation of symbolizer parts. -//===----------------------------------------------------------------------===// -#ifdef __linux__ -#include "sanitizer_common.h" -#include "sanitizer_internal_defs.h" -#include "sanitizer_libc.h" -#include "sanitizer_placement_new.h" -#include "sanitizer_symbolizer.h" - -#include <elf.h> -#include <errno.h> -#include <poll.h> -#include <sys/socket.h> -#include <sys/types.h> -#include <sys/wait.h> -#include <unistd.h> - -#if !defined(__ANDROID__) && !defined(ANDROID) -#include <link.h> -#endif - -namespace __sanitizer { - -static const int kSymbolizerStartupTimeMillis = 10; - -bool StartSymbolizerSubprocess(const char *path_to_symbolizer, - int *input_fd, int *output_fd) { - if (!FileExists(path_to_symbolizer)) { - Report("WARNING: invalid path to external symbolizer!\n"); - return false; - } - - int *infd = NULL; - int *outfd = NULL; - // The client program may close its stdin and/or stdout and/or stderr - // thus allowing socketpair to reuse file descriptors 0, 1 or 2. - // In this case the communication between the forked processes may be - // broken if either the parent or the child tries to close or duplicate - // these descriptors. The loop below produces two pairs of file - // descriptors, each greater than 2 (stderr). - int sock_pair[5][2]; - for (int i = 0; i < 5; i++) { - if (pipe(sock_pair[i]) == -1) { - for (int j = 0; j < i; j++) { - internal_close(sock_pair[j][0]); - internal_close(sock_pair[j][1]); - } - Report("WARNING: Can't create a socket pair to start " - "external symbolizer (errno: %d)\n", errno); - return false; - } else if (sock_pair[i][0] > 2 && sock_pair[i][1] > 2) { - if (infd == NULL) { - infd = sock_pair[i]; - } else { - outfd = sock_pair[i]; - for (int j = 0; j < i; j++) { - if (sock_pair[j] == infd) continue; - internal_close(sock_pair[j][0]); - internal_close(sock_pair[j][1]); - } - break; - } - } - } - CHECK(infd); - CHECK(outfd); - - int pid = fork(); - if (pid == -1) { - // Fork() failed. - internal_close(infd[0]); - internal_close(infd[1]); - internal_close(outfd[0]); - internal_close(outfd[1]); - Report("WARNING: failed to fork external symbolizer " - " (errno: %d)\n", errno); - return false; - } else if (pid == 0) { - // Child subprocess. - internal_close(STDOUT_FILENO); - internal_close(STDIN_FILENO); - internal_dup2(outfd[0], STDIN_FILENO); - internal_dup2(infd[1], STDOUT_FILENO); - internal_close(outfd[0]); - internal_close(outfd[1]); - internal_close(infd[0]); - internal_close(infd[1]); - for (int fd = getdtablesize(); fd > 2; fd--) - internal_close(fd); - execl(path_to_symbolizer, path_to_symbolizer, (char*)0); - internal__exit(1); - } - - // Continue execution in parent process. - internal_close(outfd[0]); - internal_close(infd[1]); - *input_fd = infd[0]; - *output_fd = outfd[1]; - - // Check that symbolizer subprocess started successfully. - int pid_status; - SleepForMillis(kSymbolizerStartupTimeMillis); - int exited_pid = waitpid(pid, &pid_status, WNOHANG); - if (exited_pid != 0) { - // Either waitpid failed, or child has already exited. - Report("WARNING: external symbolizer didn't start up correctly!\n"); - return false; - } - - return true; -} - -#if defined(__ANDROID__) || defined(ANDROID) -uptr GetListOfModules(LoadedModule *modules, uptr max_modules) { - UNIMPLEMENTED(); -} -#else // ANDROID -typedef ElfW(Phdr) Elf_Phdr; - -struct DlIteratePhdrData { - LoadedModule *modules; - uptr current_n; - uptr max_n; -}; - -static const uptr kMaxPathLength = 512; - -static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) { - DlIteratePhdrData *data = (DlIteratePhdrData*)arg; - if (data->current_n == data->max_n) - return 0; - InternalScopedBuffer<char> module_name(kMaxPathLength); - module_name.data()[0] = '\0'; - if (data->current_n == 0) { - // First module is the binary itself. - uptr module_name_len = internal_readlink( - "/proc/self/exe", module_name.data(), module_name.size()); - CHECK_NE(module_name_len, (uptr)-1); - CHECK_LT(module_name_len, module_name.size()); - module_name[module_name_len] = '\0'; - } else if (info->dlpi_name) { - internal_strncpy(module_name.data(), info->dlpi_name, module_name.size()); - } - if (module_name.data()[0] == '\0') - return 0; - void *mem = &data->modules[data->current_n]; - LoadedModule *cur_module = new(mem) LoadedModule(module_name.data(), - info->dlpi_addr); - data->current_n++; - for (int i = 0; i < info->dlpi_phnum; i++) { - const Elf_Phdr *phdr = &info->dlpi_phdr[i]; - if (phdr->p_type == PT_LOAD) { - uptr cur_beg = info->dlpi_addr + phdr->p_vaddr; - uptr cur_end = cur_beg + phdr->p_memsz; - cur_module->addAddressRange(cur_beg, cur_end); - } - } - return 0; -} - -uptr GetListOfModules(LoadedModule *modules, uptr max_modules) { - CHECK(modules); - DlIteratePhdrData data = {modules, 0, max_modules}; - dl_iterate_phdr(dl_iterate_phdr_cb, &data); - return data.current_n; -} -#endif // ANDROID - -} // namespace __sanitizer - -#endif // __linux__ |