From b5d53c6c683ee73b5d494b5d0750d1deca7b749f Mon Sep 17 00:00:00 2001 From: Michal Sojka Date: Tue, 12 Sep 2017 13:12:40 +0200 Subject: [PATCH] utrace: Deliver signals to traced processes Without this change, traced processes do not receive any signal, because all the signals are "eaten" by the tracer. Signed-off-by: Michal Sojka --- trace/trace.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/trace/trace.c b/trace/trace.c index 4c25a4f..cad2d37 100644 --- a/trace/trace.c +++ b/trace/trace.c @@ -148,6 +148,7 @@ static void print_syscalls(int policy, const char *json) static void tracer_cb(struct uloop_process *c, int ret) { struct tracee *tracee = container_of(c, struct tracee, proc); + int inject_signal = 0; if (WIFSTOPPED(ret)) { if (WSTOPSIG(ret) & 0x80) { @@ -174,8 +175,13 @@ static void tracer_cb(struct uloop_process *c, int ret) uloop_process_add(&child->proc); if (debug) fprintf(stderr, "Tracing new child %d\n", child->proc.pid); + } else { + inject_signal = WSTOPSIG(ret); + if (debug) + fprintf(stderr, "Injecting signal %d into pid %d\n", + inject_signal, tracee->proc.pid); } - } else if (WIFEXITED(ret)) { + } else if (WIFEXITED(ret) || (WIFSIGNALED(ret) && WTERMSIG(ret))) { if (tracee == &tracer) { uloop_end(); /* Main process exit */ } else { @@ -186,7 +192,7 @@ static void tracer_cb(struct uloop_process *c, int ret) return; } - ptrace(PTRACE_SYSCALL, c->pid, 0, 0); + ptrace(PTRACE_SYSCALL, c->pid, 0, inject_signal); uloop_process_add(c); } -- 2.25.1