crasher: add option to wait for input before crashing.
This will be useful for tests that want to do things with crasher's pid
before it crashes.
Bug: http://b/30705528
Test: crasher wait-abort; crasher wait-thread-abort
Change-Id: I8ba826094dc304d6cd0e6ab088e5cfdb35d2007b
diff --git a/debuggerd/crasher.cpp b/debuggerd/crasher.cpp
index 3db67b3..b0e8b17 100644
--- a/debuggerd/crasher.cpp
+++ b/debuggerd/crasher.cpp
@@ -160,7 +160,11 @@
{
fprintf(stderr, "%s: init pid=%d tid=%d\n", __progname, getpid(), gettid());
- if (!strncmp(arg, "exhaustfd-", strlen("exhaustfd-"))) {
+ if (!strncmp(arg, "wait-", strlen("wait-"))) {
+ char buf[1];
+ TEMP_FAILURE_RETRY(read(STDIN_FILENO, buf, sizeof(buf)));
+ return do_action(arg + strlen("wait-"));
+ } else if (!strncmp(arg, "exhaustfd-", strlen("exhaustfd-"))) {
errno = 0;
while (errno != EMFILE) {
open("/dev/null", O_RDONLY);
@@ -235,6 +239,8 @@
fprintf(stderr, "on the process' main thread.\n");
fprintf(stderr, "prefix any of the above with 'exhaustfd-' to exhaust\n");
fprintf(stderr, "all available file descriptors before crashing.\n");
+ fprintf(stderr, "prefix any of the above with 'wait-' to wait until input is received on stdin\n");
+
return EXIT_SUCCESS;
}