tests: detect if debugger is attached

Copy function from libinput/test/litest.c is_debugger_detached()
and use it in our test-runner. If debugger is attached, turn off
leak checks and timeouts automatically.

Revision of libinput: 028513a0a723e97941c39c4aeb17433198723913

v2. rebased to master

Signed-off-by: Marek Chalupa <mchqwerty@gmail.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

diff --git a/tests/test-runner.c b/tests/test-runner.c
index 431511a..753617f 100644 (file)
--- a/tests/test-runner.c
+++ b/tests/test-runner.c
@@ -33,6 +33,7 @@
 #include <dlfcn.h>
 #include <errno.h>
 #include <limits.h>
+#include <sys/ptrace.h>
 
 #include "test-runner.h"
 
@@ -246,6 +247,38 @@ stderr_reset_color(void)
                fprintf(stderr, "\033[0m");
 }
 
+/* this function is taken from libinput/test/litest.c
+ * (rev 028513a0a723e97941c39)
+ */
+static int
+is_debugger_attached(void)
+{
+       int status;
+       int rc;
+       int pid = fork();
+
+       if (pid == -1)
+               return 0;
+
+       if (pid == 0) {
+               int ppid = getppid();
+               if (ptrace(PTRACE_ATTACH, ppid, NULL, NULL) == 0) {
+                       waitpid(ppid, NULL, 0);
+                       ptrace(PTRACE_CONT, NULL, NULL);
+                       ptrace(PTRACE_DETACH, ppid, NULL, NULL);
+                       rc = 0;
+               } else {
+                       rc = 1;
+               }
+               _exit(rc);
+       } else {
+               waitpid(pid, &status, 0);
+               rc = WEXITSTATUS(status);
+       }
+
+       return rc;
+}
+
 int main(int argc, char *argv[])
 {
        const struct test *t;
@@ -259,12 +292,17 @@ int main(int argc, char *argv[])
        sys_malloc = dlsym(RTLD_NEXT, "malloc");
        sys_free = dlsym(RTLD_NEXT, "free");
 
-       leak_check_enabled = !getenv("WAYLAND_TEST_NO_LEAK_CHECK");
-       timeouts_enabled = !getenv("WAYLAND_TEST_NO_TIMEOUTS");
-
        if (isatty(fileno(stderr)))
                is_atty = 1;
 
+       if (is_debugger_attached()) {
+               leak_check_enabled = 0;
+               timeouts_enabled = 0;
+       } else {
+               leak_check_enabled = !getenv("WAYLAND_TEST_NO_LEAK_CHECK");
+               timeouts_enabled = !getenv("WAYLAND_TEST_NO_TIMEOUTS");
+       }
+
        if (argc == 2 && strcmp(argv[1], "--help") == 0)
                usage(argv[0], EXIT_SUCCESS);