commit 63e33c96baac73f7cdf5c88e608316a6e0d4f506
author Josh Gao <jmgao@google.com> Wed Mar 23 14:02:52 2016 -0700
committer Josh Gao <jmgao@google.com> Wed Mar 23 14:07:58 2016 -0700
tree 6d92529971a0e9d5cad7041e33e7e2f023b4898a
parent 61b206c782a4a48199ea1691ea5a0b6338491fe6

debuggerd: waitpid for all children, and log the result.

Change-Id: Ic575e6db76ab153b4b238589a8cd299812d0e046

debuggerd/debuggerd.cpp

diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index 18c608b..842bf09 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -580,9 +580,20 @@
   siginfo_t siginfo;
   int signal = TEMP_FAILURE_RETRY(sigtimedwait(&signal_set, &siginfo, &timeout));
   if (signal == SIGCHLD) {
-    pid_t rc = waitpid(0, &status, WNOHANG | WUNTRACED);
+    pid_t rc = waitpid(-1, &status, WNOHANG | WUNTRACED);
     if (rc != child_pid) {
       ALOGE("debuggerd: waitpid returned unexpected pid (%d), committing murder-suicide", rc);
+
+      if (WIFEXITED(status)) {
+        ALOGW("debuggerd: pid %d exited with status %d", rc, WEXITSTATUS(status));
+      } else if (WIFSIGNALED(status)) {
+        ALOGW("debuggerd: pid %d received signal %d", rc, WTERMSIG(status));
+      } else if (WIFSTOPPED(status)) {
+        ALOGW("debuggerd: pid %d stopped by signal %d", rc, WSTOPSIG(status));
+      } else if (WIFCONTINUED(status)) {
+        ALOGW("debuggerd: pid %d continued", rc);
+      }
+
       kill_worker = true;
       kill_target = true;
       kill_self = true;