[lldb] Make RegisterContextThreadMemory thread safe
#134469
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The UpdateRegisterContext method can be called from multiple threads.
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@llvm/pr-subscribers-lldb Author: Felipe de Azevedo Piovezan (felipepiovezan) ChangesThe UpdateRegisterContext method can be called from multiple threads. Full diff: https://github.com/llvm/llvm-project/pull/134469.diff 2 Files Affected:
diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.cpp
index 75438550ce914..29927e3b5e4ed 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.cpp
@@ -25,6 +25,8 @@ RegisterContextThreadMemory::RegisterContextThreadMemory(
RegisterContextThreadMemory::~RegisterContextThreadMemory() = default;
void RegisterContextThreadMemory::UpdateRegisterContext() {
+ std::lock_guard<std::mutex> lock(m_update_register_ctx_lock);
+
ThreadSP thread_sp(m_thread_wp.lock());
if (thread_sp) {
ProcessSP process_sp(thread_sp->GetProcess());
diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.h b/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.h
index 23f675508cf38..1df32bbc1f057 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.h
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.h
@@ -99,6 +99,8 @@ class RegisterContextThreadMemory : public lldb_private::RegisterContext {
RegisterContextThreadMemory(const RegisterContextThreadMemory &) = delete;
const RegisterContextThreadMemory &
operator=(const RegisterContextThreadMemory &) = delete;
+
+ std::mutex m_update_register_ctx_lock;
};
} // namespace lldb_private
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felipepiovezan
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Apr 5, 2025
The UpdateRegisterContext method can be called from multiple threads. (cherry picked from commit 6272e1f)
felipepiovezan
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…ry-pick [cherry-pick][lldb] Make `RegisterContextThreadMemory` thread safe (llvm#134469)
felipepiovezan
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The UpdateRegisterContext method can be called from multiple threads. (cherry picked from commit 6272e1f)
adrian-prantl
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Apr 8, 2025
…dsafe_6.2 [lldb] Make `RegisterContextThreadMemory` thread safe (llvm#134469)
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The UpdateRegisterContext method can be called from multiple threads.