diff --git a/docs/signal-safe-tracing.md b/docs/signal-safe-tracing.md index 681c27e..e51e6d1 100644 --- a/docs/signal-safe-tracing.md +++ b/docs/signal-safe-tracing.md @@ -147,6 +147,9 @@ void do_signal_safe_trace(cpptrace::frame_ptr* buffer, std::size_t size) { close(input_pipe.read_end); close(input_pipe.write_end); execl("signal_tracer", "signal_tracer", nullptr); + const char* exec_failure_message = "exec(signal_tracer) failed: Make sure the signal_tracer executable is in " + "the current working directory and the binary's permissions are correct.\n"; + write(STDERR_FILENO, exec_failure_message, strlen(exec_failure_message)); _exit(1); } // Resolve to safe_object_frames and write those to the pipe diff --git a/test/signal_demo.cpp b/test/signal_demo.cpp index 1d7b9a4..1f0d12a 100644 --- a/test/signal_demo.cpp +++ b/test/signal_demo.cpp @@ -52,6 +52,9 @@ void handler(int signo, siginfo_t* info, void* context) { "signal_tracer", nullptr ); + const char* exec_failure_message = "exec(signal_tracer) failed: Make sure the signal_tracer executable is in " + "the current working directory and the binary's permissions are correct.\n"; + write(STDERR_FILENO, exec_failure_message, strlen(exec_failure_message)); _exit(1); } for(std::size_t i = 0; i < count; i++) {