debuggerd: dump frozen Java processes
Test: stacks <pid>
Test: adb shell debuggerd -b <pid>
Bug: 319754740
Change-Id: Iae230ff34409bee4a325113aed65433292975427
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index 26726cf..0d4b91f 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -91,6 +91,15 @@
}
}
+ // unfreeze if pid is frozen.
+ const std::string freeze_file = android::base::StringPrintf(
+ "/sys/fs/cgroup/uid_%d/pid_%d/cgroup.freeze", proc_info.uid, proc_info.pid);
+ if (std::string freeze_status;
+ android::base::ReadFileToString(freeze_file, &freeze_status) && freeze_status[0] == '1') {
+ android::base::WriteStringToFile("0", freeze_file);
+ // we don't restore the frozen state as this is considered a benign change.
+ }
+
unique_fd output_fd(fcntl(STDOUT_FILENO, F_DUPFD_CLOEXEC, 0));
if (output_fd.get() == -1) {
err(1, "failed to fcntl dup stdout");