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test-runner: Implement is_debugger_attached() for FreeBSD

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FreeBSD provides a PROC_TRACE_STATUS procctl(2) to detect this directly.

Signed-off-by: Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
This commit is contained in:
Alex Richardson 2021-03-15 22:37:49 +00:00 • committed by Alexander Richardson
parent 644efe9517
commit bb92828807
2 changed files with 23 additions and 1 deletions
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2
meson.build
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@ -26,7 +26,7 @@ add_project_arguments(
language: 'c' language: 'c'
) )
foreach h: [ 'sys/prctl.h', 'sys/ucred.h' ] foreach h: [ 'sys/prctl.h', 'sys/procctl.h', 'sys/ucred.h' ]
config_h.set('HAVE_' + h.underscorify().to_upper(), cc.has_header(h)) config_h.set('HAVE_' + h.underscorify().to_upper(), cc.has_header(h))
endforeach endforeach

22
tests/test-runner.c
View file

@ -22,6 +22,7 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE. * SOFTWARE.
*/ */
#include "../config.h"
#define _GNU_SOURCE #define _GNU_SOURCE
@ -36,11 +37,16 @@
#include <dlfcn.h> #include <dlfcn.h>
#include <errno.h> #include <errno.h>
#include <limits.h> #include <limits.h>
#include <signal.h>
#include <sys/ptrace.h> #include <sys/ptrace.h>
#ifdef HAVE_SYS_PROCCTL_H
#include <sys/procctl.h>
#elif defined(HAVE_SYS_PRCTL_H)
#include <sys/prctl.h> #include <sys/prctl.h>
#ifndef PR_SET_PTRACER #ifndef PR_SET_PTRACER
# define PR_SET_PTRACER 0x59616d61 # define PR_SET_PTRACER 0x59616d61
#endif #endif
#endif
#include "test-runner.h" #include "test-runner.h"
@ -226,6 +232,21 @@ stderr_reset_color(void)
* Returns: 1 if a debugger is confirmed present; 0 if no debugger is * Returns: 1 if a debugger is confirmed present; 0 if no debugger is
* present or if it can't be determined. * present or if it can't be determined.
*/ */
#if defined(HAVE_SYS_PROCCTL_H) && defined(PROC_TRACE_STATUS)
static int
is_debugger_attached(void)
{
int rc;
int status;
rc = procctl(P_PID, getpid(), PROC_TRACE_STATUS, &status);
if (rc == -1) {
perror("procctl");
return 0;
}
/* -1=tracing disabled, 0=no debugger attached, >0=pid of debugger. */
return status > 0;
}
#elif defined(HAVE_SYS_PRCTL_H)
static int static int
is_debugger_attached(void) is_debugger_attached(void)
{ {
@ -287,6 +308,7 @@ is_debugger_attached(void)
return rc; return rc;
} }
#endif
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {