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Add wait-for-debugger test harness hooks

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If WAIT_FOR_DEBUGGER is set to a non-zero value in the environment,
any test that runs will print some useful gdb information and wait
for gdb to attach to it and clear the "wait_for_debugger" variable.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
DJ Delorie
2019-10-02 14:46:46 -04:00
parent acab05949f
commit 4052fa22f6
2 changed files with 75 additions and 0 deletions
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53
support/support_test_main.c
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@@ -19,6 +19,7 @@
#include <support/test-driver.h>
#include <support/check.h>
#include <support/temp_file-internal.h>
#include <support/support.h>
#include <assert.h>
#include <errno.h>
@@ -36,6 +37,8 @@
#include <time.h>
#include <unistd.h>
#include <xstdio.h>
static const struct option default_options[] =
{
TEST_DEFAULT_OPTIONS
@@ -176,10 +179,55 @@ signal_handler (int sig)
exit (1);
}
/* This must be volatile as it will be modified by the debugger. */
static volatile int wait_for_debugger = 0;
/* Run test_function or test_function_argv. */
static int
run_test_function (int argc, char **argv, const struct test_config *config)
{
const char *wfd = getenv("WAIT_FOR_DEBUGGER");
if (wfd != NULL)
wait_for_debugger = atoi (wfd);
if (wait_for_debugger)
{
pid_t mypid;
FILE *gdb_script;
char *gdb_script_name;
int inside_container = 0;
mypid = getpid();
if (mypid < 3)
{
const char *outside_pid = getenv("PID_OUTSIDE_CONTAINER");
if (outside_pid)
{
mypid = atoi (outside_pid);
inside_container = 1;
}
}
gdb_script_name = (char *) xmalloc (strlen (argv[0]) + strlen (".gdb") + 1);
sprintf (gdb_script_name, "%s.gdb", argv[0]);
gdb_script = xfopen (gdb_script_name, "w");
fprintf (stderr, "Waiting for debugger, test process is pid %d\n", mypid);
fprintf (stderr, "gdb -x %s\n", gdb_script_name);
if (inside_container)
fprintf (gdb_script, "set sysroot %s/testroot.root\n", support_objdir_root);
fprintf (gdb_script, "file\n");
fprintf (gdb_script, "file %s\n", argv[0]);
fprintf (gdb_script, "symbol-file %s\n", argv[0]);
fprintf (gdb_script, "exec-file %s\n", argv[0]);
fprintf (gdb_script, "attach %ld\n", (long int) mypid);
fprintf (gdb_script, "set wait_for_debugger = 0\n");
fclose (gdb_script);
}
/* Wait for the debugger to set wait_for_debugger to zero. */
while (wait_for_debugger)
usleep (1000);
if (config->test_function != NULL)
return config->test_function ();
else if (config->test_function_argv != NULL)
@@ -229,6 +277,11 @@ support_test_main (int argc, char **argv, const struct test_config *config)
unsigned int timeoutfactor = 1;
pid_t termpid;
/* If we're debugging the test, we need to disable timeouts and use
the initial pid (esp if we're running inside a container). */
if (getenv("WAIT_FOR_DEBUGGER") != NULL)
direct = 1;
if (!config->no_mallopt)
{
/* Make uses of freed and uninitialized memory known. Do not