utrace: Support tracing multi-threaded processes and vfork

Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>

diff --git a/trace/trace.c b/trace/trace.c
index f882c2e0d5a14a2d5e110634d9456e87eb3c4daf..4c25a4f39177219322509a19508d1da7ab406f66 100644 (file)
--- a/trace/trace.c
+++ b/trace/trace.c
@@ -163,7 +163,9 @@ static void tracer_cb(struct uloop_process *c, int ret)
                                }
                        }
                        tracee->in_syscall = !tracee->in_syscall;
-               } else if ((ret >> 8) == (SIGTRAP | (PTRACE_EVENT_FORK << 8))) {
+               } else if ((ret >> 8) == (SIGTRAP | (PTRACE_EVENT_FORK << 8)) ||
+                          (ret >> 8) == (SIGTRAP | (PTRACE_EVENT_VFORK << 8)) ||
+                          (ret >> 8) == (SIGTRAP | (PTRACE_EVENT_CLONE << 8))) {
                        struct tracee *child = calloc(1, sizeof(struct tracee));
 
                        ptrace(PTRACE_GETEVENTMSG, c->pid, 0, &child->proc.pid);
@@ -254,7 +256,9 @@ int main(int argc, char **argv, char **envp)
 
        ptrace(PTRACE_SETOPTIONS, child, 0,
               PTRACE_O_TRACESYSGOOD |
-              PTRACE_O_TRACEFORK);
+              PTRACE_O_TRACEFORK |
+              PTRACE_O_TRACEVFORK |
+              PTRACE_O_TRACECLONE);
        ptrace(PTRACE_SYSCALL, child, 0, 0);
 
        uloop_init();