1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/InstrumentationRuntime/ASan/InstrumentationRuntimeASan.cpp b/contrib/llvm-project/lldb/source/Plugins/InstrumentationRuntime/ASan/InstrumentationRuntimeASan.cpp
new file mode 100644
index 000000000000..a09c89103b0e
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/InstrumentationRuntime/ASan/InstrumentationRuntimeASan.cpp
@@ -0,0 +1,113 @@
+//===-- InstrumentationRuntimeASan.cpp ------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "InstrumentationRuntimeASan.h"
+
+#include "lldb/Breakpoint/StoppointCallbackContext.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginInterface.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Utility/RegularExpression.h"
+
+#include "Plugins/InstrumentationRuntime/Utility/ReportRetriever.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE(InstrumentationRuntimeASan)
+
+lldb::InstrumentationRuntimeSP
+InstrumentationRuntimeASan::CreateInstance(const lldb::ProcessSP &process_sp) {
+  return InstrumentationRuntimeSP(new InstrumentationRuntimeASan(process_sp));
+}
+
+void InstrumentationRuntimeASan::Initialize() {
+  PluginManager::RegisterPlugin(
+      GetPluginNameStatic(), "AddressSanitizer instrumentation runtime plugin.",
+      CreateInstance, GetTypeStatic);
+}
+
+void InstrumentationRuntimeASan::Terminate() {
+  PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+lldb::InstrumentationRuntimeType InstrumentationRuntimeASan::GetTypeStatic() {
+  return eInstrumentationRuntimeTypeAddressSanitizer;
+}
+
+InstrumentationRuntimeASan::~InstrumentationRuntimeASan() { Deactivate(); }
+
+const RegularExpression &
+InstrumentationRuntimeASan::GetPatternForRuntimeLibrary() {
+  // FIXME: This shouldn't include the "dylib" suffix.
+  static RegularExpression regex(
+      llvm::StringRef("libclang_rt.asan_(.*)_dynamic\\.dylib"));
+  return regex;
+}
+
+bool InstrumentationRuntimeASan::CheckIfRuntimeIsValid(
+    const lldb::ModuleSP module_sp) {
+  const Symbol *symbol = module_sp->FindFirstSymbolWithNameAndType(
+      ConstString("__asan_get_alloc_stack"), lldb::eSymbolTypeAny);
+
+  return symbol != nullptr;
+}
+
+bool InstrumentationRuntimeASan::NotifyBreakpointHit(
+    void *baton, StoppointCallbackContext *context, user_id_t break_id,
+    user_id_t break_loc_id) {
+  assert(baton && "null baton");
+  if (!baton)
+    return false;
+
+  InstrumentationRuntimeASan *const instance =
+      static_cast<InstrumentationRuntimeASan *>(baton);
+
+  ProcessSP process_sp = instance->GetProcessSP();
+
+  return ReportRetriever::NotifyBreakpointHit(process_sp, context, break_id,
+                                              break_loc_id);
+}
+
+void InstrumentationRuntimeASan::Activate() {
+  if (IsActive())
+    return;
+
+  ProcessSP process_sp = GetProcessSP();
+  if (!process_sp)
+    return;
+
+  Breakpoint *breakpoint = ReportRetriever::SetupBreakpoint(
+      GetRuntimeModuleSP(), process_sp, ConstString("_ZN6__asanL7AsanDieEv"));
+
+  if (!breakpoint)
+    return;
+
+  const bool sync = false;
+
+  breakpoint->SetCallback(InstrumentationRuntimeASan::NotifyBreakpointHit, this,
+                          sync);
+  breakpoint->SetBreakpointKind("address-sanitizer-report");
+  SetBreakpointID(breakpoint->GetID());
+
+  SetActive(true);
+}
+
+void InstrumentationRuntimeASan::Deactivate() {
+  SetActive(false);
+
+  if (GetBreakpointID() == LLDB_INVALID_BREAK_ID)
+    return;
+
+  if (ProcessSP process_sp = GetProcessSP()) {
+    process_sp->GetTarget().RemoveBreakpointByID(GetBreakpointID());
+    SetBreakpointID(LLDB_INVALID_BREAK_ID);
+  }
+}