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, 104 insertions, 0 deletions

diff --git a/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.h b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.h
new file mode 100644
index 00000000000..922d4292af0
--- /dev/null
+++ b/lldb/source/Plugins/InstrumentationRuntime/ThreadSanitizer/ThreadSanitizerRuntime.h
@@ -0,0 +1,104 @@
+//===-- ThreadSanitizerRuntime.h --------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ThreadSanitizerRuntime_h_
+#define liblldb_ThreadSanitizerRuntime_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Target/ABI.h"
+#include "lldb/Target/InstrumentationRuntime.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Core/StructuredData.h"
+
+namespace lldb_private {
+    
+class ThreadSanitizerRuntime : public lldb_private::InstrumentationRuntime
+{
+public:
+    ~ThreadSanitizerRuntime() override;
+    
+    static lldb::InstrumentationRuntimeSP
+    CreateInstance (const lldb::ProcessSP &process_sp);
+    
+    static void
+    Initialize();
+    
+    static void
+    Terminate();
+    
+    static lldb_private::ConstString
+    GetPluginNameStatic();
+    
+    static lldb::InstrumentationRuntimeType
+    GetTypeStatic();
+    
+    lldb_private::ConstString
+    GetPluginName() override
+    {
+        return GetPluginNameStatic();
+    }
+    
+    virtual lldb::InstrumentationRuntimeType
+    GetType() { return GetTypeStatic(); }
+    
+    uint32_t
+    GetPluginVersion() override
+    {
+        return 1;
+    }
+    
+    void
+    ModulesDidLoad(lldb_private::ModuleList &module_list) override;
+    
+    bool
+    IsActive() override;
+    
+private:
+    ThreadSanitizerRuntime(const lldb::ProcessSP &process_sp);
+    
+    lldb::ProcessSP
+    GetProcessSP ()
+    {
+        return m_process_wp.lock();
+    }
+
+    lldb::ModuleSP
+    GetRuntimeModuleSP ()
+    {
+        return m_runtime_module_wp.lock();
+    }
+
+    void
+    Activate();
+    
+    void
+    Deactivate();
+    
+    static bool
+    NotifyBreakpointHit(void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id, lldb::user_id_t break_loc_id);
+    
+    StructuredData::ObjectSP
+    RetrieveReportData(ExecutionContextRef exe_ctx_ref);
+    
+    std::string
+    FormatDescription(StructuredData::ObjectSP report);
+    
+    bool m_is_active;
+    lldb::ModuleWP m_runtime_module_wp;
+    lldb::ProcessWP m_process_wp;
+    lldb::user_id_t m_breakpoint_id;
+};
+    
+} // namespace lldb_private
+
+#endif // liblldb_ThreadSanitizerRuntime_h_