am 5e742107: am c4afc192: Merge "Add SIGTRAP support to crasher and debuggerd."

* commit '5e7421073243337075975ecf762ae084765fdb5f':
  Add SIGTRAP support to crasher and debuggerd.

debuggerd/crasher.c

@@ -144,6 +144,9 @@ static int do_action(const char* arg)
         close(pipe_fds[0]);
         write(pipe_fds[1], "oops", 4);
         return EXIT_SUCCESS;
+    } else if (!strcmp(arg, "SIGTRAP")) {
+        raise(SIGTRAP);
+        return EXIT_SUCCESS;
     } else if (!strcmp(arg, "heap-usage")) {
         abuse_heap();
     }
@@ -164,6 +167,7 @@ static int do_action(const char* arg)
     fprintf(stderr, "  LOG_ALWAYS_FATAL_IF   call LOG_ALWAYS_FATAL\n");
     fprintf(stderr, "  SIGPIPE               cause a SIGPIPE\n");
     fprintf(stderr, "  SIGSEGV               cause a SIGSEGV (synonym: crash)\n");
+    fprintf(stderr, "  SIGTRAP               cause a SIGTRAP\n");
     fprintf(stderr, "prefix any of the above with 'thread-' to not run\n");
     fprintf(stderr, "on the process' main thread.\n");
     return EXIT_SUCCESS;

debuggerd/debuggerd.cpp

@@ -322,15 +322,16 @@ static void handle_request(int fd) {
               }
               break;
 
-            case SIGILL:
             case SIGABRT:
             case SIGBUS:
             case SIGFPE:
-            case SIGSEGV:
+            case SIGILL:
             case SIGPIPE:
+            case SIGSEGV:
 #ifdef SIGSTKFLT
             case SIGSTKFLT:
 #endif
+            case SIGTRAP:
               XLOG("stopped -- fatal signal\n");
               // Send a SIGSTOP to the process to make all of
               // the non-signaled threads stop moving.  Without