diff options
Diffstat (limited to 'libsandbox')
| -rw-r--r-- | libsandbox/trace.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libsandbox/trace.c b/libsandbox/trace.c index 4e01f6e..4ae58aa 100644 --- a/libsandbox/trace.c +++ b/libsandbox/trace.c @@ -584,8 +584,14 @@ static char *flatten_args(char *const argv[]) bool trace_possible(const char *filename, char *const argv[], const void *data) { - if (_trace_possible(data)) - return true; + if (_trace_possible(data)) { + /* If we're in an environment like QEMU where ptrace doesn't work, then + * don't try to use it. If ptrace does work, this should fail with ESRCH. + */ + errno = 0; + ptrace(PTRACE_CONT, 0, NULL, NULL); + return errno == ENOSYS ? false : true; + } char *args = flatten_args(argv); sb_eqawarn("Unable to trace static ELF: %s: %s\n", filename, args); |