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@ -20,14 +20,13 @@
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#include <signal.h>
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#include <sys/utsname.h>
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#include <setjmp.h>
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#if defined(WITH_DBG_GDB)
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#if defined(WITH_DBG_GDB)
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#include <sys/syscall.h>
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#endif /* WITH_DBG_GDB */
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#if defined(WITH_PRCTL_PT)
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@ -74,6 +73,60 @@ static void LogStacktraceSigSegvHandler(int sig)
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}
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#endif
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static bool ExecReadStdout(const char *file, char *const *args, char *&buffer, const char *last)
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{
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int pipefd[2];
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if (pipe(pipefd) == -1) return false;
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int pid = fork();
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if (pid < 0) return false;
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if (pid == 0) {
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/* child */
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close(pipefd[0]); /* Close unused read end */
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dup2(pipefd[1], STDOUT_FILENO);
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close(pipefd[1]);
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int null_fd = open("/dev/null", O_RDWR);
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if (null_fd != -1) {
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dup2(null_fd, STDERR_FILENO);
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dup2(null_fd, STDIN_FILENO);
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}
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execvp(file, args);
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exit(42);
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}
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/* parent */
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close(pipefd[1]); /* Close unused write end */
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while (buffer < last) {
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ssize_t res = read(pipefd[0], buffer, last - buffer);
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if (res < 0) {
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if (errno == EINTR) continue;
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break;
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} else if (res == 0) {
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break;
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} else {
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buffer += res;
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}
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}
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buffer += seprintf(buffer, last, "\n");
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close(pipefd[0]); /* close read end */
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int status;
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int wait_ret = waitpid(pid, &status, 0);
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if (wait_ret == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
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/* command did not appear to run successfully */
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return false;
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} else {
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/* command executed successfully */
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return true;
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}
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}
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/**
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* Unix implementation for the crash logger.
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*/
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@ -107,6 +160,23 @@ class CrashLogUnix : public CrashLog {
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);
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}
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/* virtual */ char *LogOSVersionDetail(char *buffer, const char *last) const
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{
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struct utsname name;
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if (uname(&name) < 0) return buffer;
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if (strcmp(name.sysname, "Linux") == 0) {
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char *buffer_orig = buffer;
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buffer += seprintf(buffer, last, "Distro version:\n");
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const char *args[] = { "/bin/sh", "-c", "lsb_release -a || find /etc -maxdepth 1 -type f -a \\( -name '*release' -o -name '*version' \\) -exec head -v {} \\+", NULL };
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if (!ExecReadStdout("/bin/sh", const_cast<char* const*>(args), buffer, last)) {
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buffer = buffer_orig;
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}
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}
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return buffer;
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}
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/* virtual */ char *LogError(char *buffer, const char *last, const char *message) const
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{
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buffer += seprintf(buffer, last,
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@ -253,84 +323,40 @@ class CrashLogUnix : public CrashLog {
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pid_t tid = syscall(SYS_gettid);
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int pipefd[2];
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if (pipe(pipefd) == -1) return buffer;
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int pid = fork();
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if (pid < 0) return buffer;
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if (pid == 0) {
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/* child */
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char *buffer_orig = buffer;
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buffer += seprintf(buffer, last, "GDB info:\n");
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close(pipefd[0]); /* Close unused read end */
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dup2(pipefd[1], STDOUT_FILENO);
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close(pipefd[1]);
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int null_fd = open("/dev/null", O_RDWR);
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if (null_fd != -1) {
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dup2(null_fd, STDERR_FILENO);
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dup2(null_fd, STDIN_FILENO);
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}
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char tid_buffer[16];
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char disasm_buffer[32];
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char tid_buffer[16];
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char disasm_buffer[32];
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seprintf(tid_buffer, lastof(tid_buffer), "%d", tid);
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seprintf(tid_buffer, lastof(tid_buffer), "%d", tid);
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std::vector<const char *> args;
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args.push_back("gdb");
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args.push_back("-n");
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args.push_back("-p");
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args.push_back(tid_buffer);
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args.push_back("-batch");
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std::vector<const char *> args;
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args.push_back("gdb");
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args.push_back("-n");
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args.push_back("-p");
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args.push_back(tid_buffer);
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args.push_back("-batch");
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args.push_back("-ex");
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args.push_back("echo \\nBacktrace:\\n");
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args.push_back("-ex");
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args.push_back("bt full");
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#ifdef WITH_SIGACTION
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if (this->GetMessage() == NULL && this->signal_instruction_ptr_valid) {
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seprintf(disasm_buffer, lastof(disasm_buffer), "x/1i %p", this->signal_instruction_ptr);
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args.push_back("-ex");
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args.push_back("echo \\nBacktrace:\\n");
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args.push_back("set disassembly-flavor intel");
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args.push_back("-ex");
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args.push_back("bt full");
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#ifdef WITH_SIGACTION
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if (this->GetMessage() == NULL && this->signal_instruction_ptr_valid) {
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seprintf(disasm_buffer, lastof(disasm_buffer), "x/1i %p", this->signal_instruction_ptr);
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args.push_back("-ex");
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args.push_back("set disassembly-flavor intel");
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args.push_back("-ex");
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args.push_back("echo \\nFault instruction:\\n");
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args.push_back("-ex");
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args.push_back(disasm_buffer);
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}
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#endif
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args.push_back(NULL);
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execvp("gdb", const_cast<char* const*>(&(args[0])));
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exit(42);
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}
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/* parent */
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close(pipefd[1]); /* Close unused write end */
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char *buffer_orig = buffer;
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buffer += seprintf(buffer, last, "GDB info:\n");
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while (buffer < last) {
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ssize_t res = read(pipefd[0], buffer, last - buffer);
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if (res < 0) {
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if (errno == EINTR) continue;
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break;
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} else if (res == 0) {
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break;
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} else {
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buffer += res;
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}
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args.push_back("echo \\nFault instruction:\\n");
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args.push_back("-ex");
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args.push_back(disasm_buffer);
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}
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buffer += seprintf(buffer, last, "\n");
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close(pipefd[0]); /* close read end */
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#endif
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int status;
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int wait_ret = waitpid(pid, &status, 0);
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if (wait_ret == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
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/* gdb did not appear to run successfully */
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args.push_back(NULL);
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if (!ExecReadStdout("gdb", const_cast<char* const*>(&(args[0])), buffer, last)) {
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buffer = buffer_orig;
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}
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#endif /* WITH_DBG_GDB */
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