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* crash_dump: fork a copy of the target's address space.Josh Gao2017-12-151-0/+16
| | | | | | | | | | | | | | Reduce the amount of time that a process remains paused by pausing its threads, fetching their registers, and then performing unwinding on a copy of its address space. This also works around a kernel change that's in 4.9 that prevents ptrace from reading memory of processes that we don't have immediate permissions to ptrace (even if we previously ptraced them). Bug: http://b/62112103 Bug: http://b/63989615 Test: treehugger Change-Id: I7b9cc5dd8f54a354bc61f1bda0d2b7a8a55733c4
* base: add Pipe and Socketpair wrappers.Josh Gao2017-08-281-10/+0
| | | | | | | Also, switch debuggerd_handler over to using android::base::unique_fd. Test: treehugger Change-Id: I97b2ce22f1795ce1c4370f95d00d769846cc54b8
* tombstoned: Add a shared library version of libtombstoned_client...Narayan Kamath2017-05-221-2/+2
| | | | | | | | | | | | | | | | | | | .. for ART and the frameworks to link against. In the new stack dumping scheme (see related bug), the Java runtime will communicate with tombstoned in order to obtain a FD to which it can write its traces. Also move things around to separate headers that are private implementation details from headers that constitute the public debuggerd API. There are currently only three such headers : - tombstoned/tombstoned.h - debuggerd/client.h - debuggerd/handler.h Bug: 32064548 Test: make Change-Id: If1b8578550e373d84828b180bbe585f1088d1aa3
* Move libc_logging to libasync_safe.Christopher Ferris2017-05-021-2/+0
| | | | | | | | | | | | | | | | Move the name of the "private/libc_logging.h" header to <async_safe/log.h>. For use of libc_malloc_debug_backtrace, remove the libc_logging library. The library now includes the async safe log functions. Remove the references to libc_logging.cpp in liblog, it isn't needed because the code is already protected by a check of the __ANDROID__ define. Test: Compiled and boot bullhead device. Test: Run debuggerd unit tests. Test: Run liblog unit tests on target and host. Test: Run libmemunreachable unit tests (these tests are flaky though). Change-Id: Ie79d7274febc31f210b610a2c4da958b5304e402
* debuggerd_handler: implement missing fallback functionality.Josh Gao2017-03-091-5/+9
| | | | | | | | | Allow the fallback implementation to dump traces and create tombstones in seccomped processes. Bug: http://b/35858739 Test: debuggerd -b `pidof media.codec`; killall -ABRT media.codec Change-Id: I381b283de39a66d8900f1c320d32497d6f2b4ec4
* debuggerd: advance our amazing bet.Josh Gao2017-01-171-0/+96
Remove debuggerd in favor of a helper process that gets execed by crashing processes. Bug: http://b/30705528 Test: debuggerd_test Change-Id: I9906c69473989cbf7fe5ea6cccf9a9c563d75906