forked from OSchip/llvm-project
f81049184a
Summary: The gdb-remote async thread cannot modify thread state while the main thread holds a lock on the state. Don't use locking thread iteration for bt all. Specifically, the deadlock manifests when lldb attempts to JIT code to symbolicate objective c while backtracing. As part of this code path, SetPrivateState() is called on an async thread. This async thread will block waiting for the thread_list lock held by the main thread in CommandObjectIterateOverThreads. The main thread will also block on the async thread during DoResume (although with a timeout), leading to a deadlock. Due to the timeout, the deadlock is not immediately apparent, but the inferior will be left in an invalid state after the bt all completes, and objective-c symbols will not be successfully resolved in the backtrace. Reviewers: andrew.w.kaylor, jingham, clayborg Subscribers: sas, lldb-commits Differential Revision: http://reviews.llvm.org/D18075 Change by Francis Ricci <fjricci@fb.com> llvm-svn: 263735 |
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| .. | ||
| cmake | ||
| docs | ||
| examples | ||
| include/lldb | ||
| lit | ||
| lldb.xcodeproj | ||
| lldb.xcworkspace | ||
| packages/Python/lldbsuite | ||
| resources | ||
| scripts | ||
| source | ||
| test | ||
| third_party/Python/module | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .clang-format | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.txt | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| use_lldb_suite_root.py | ||