Add ThreadSanitizer debugging support.

This patch adds ThreadSanitizer support into LLDB:
- Adding a new InstrumentationRuntime plugin, ThreadSanitizerRuntime, in the same way ASan is implemented.
- A breakpoint stops in `__tsan_on_report`, then we extract all sorts of information by evaluating an expression. We then populate this into StopReasonExtendedInfo.
- SBThread gets a new API, SBThread::GetStopReasonExtendedBacktraces(), which returns TSan’s backtraces in the form of regular SBThreads. Non-TSan stop reasons return an empty collection.
- Added some test cases.

Reviewed by Greg Clayton.

llvm-svn: 264162

1 files changed, 9 insertions, 0 deletions

diff --git a/lldb/scripts/interface/SBThread.i b/lldb/scripts/interface/SBThread.i
index 50160590ad5..3dcb8484f02 100644
--- a/lldb/scripts/interface/SBThread.i
+++ b/lldb/scripts/interface/SBThread.i
@@ -118,6 +118,15 @@ public:
     ") GetStopReasonExtendedInfoAsJSON;
     bool
     GetStopReasonExtendedInfoAsJSON (lldb::SBStream &stream);
+    
+    %feature("autodoc", "
+    Returns a collection of historical stack traces that are significant to the
+    current stop reason. Used by ThreadSanitizer, where we provide various stack
+    traces that were involved in a data race or other type of detected issue.
+    ") GetStopReasonExtendedBacktraces;
+    SBThreadCollection
+    GetStopReasonExtendedBacktraces (InstrumentationRuntimeType type);
+
 
     %feature("autodoc", "
     Pass only an (int)length and expect to get a Python string describing the