mib updated this revision to Diff 240238.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D73303/new/
https://reviews.llvm.org/D73303
Files:
lldb/include/lldb/Target/AbortRecognizer.h
lldb/include/lldb/Target/StackFrameRecognizer.h
lldb/include/lldb/Target/StopInfo.h
lldb/include/lldb/Target/Thread.h
lldb/source/Target/AbortRecognizer.cpp
lldb/source/Target/CMakeLists.txt
lldb/source/Target/Process.cpp
lldb/source/Target/StackFrameRecognizer.cpp
lldb/source/Target/StopInfo.cpp
lldb/source/Target/Thread.cpp
lldb/test/Shell/Recognizer/Inputs/abort.c
lldb/test/Shell/Recognizer/abort.test
Index: lldb/test/Shell/Recognizer/abort.test
===================================================================
--- /dev/null
+++ lldb/test/Shell/Recognizer/abort.test
@@ -0,0 +1,10 @@
+# UNSUPPORTED: system-windows
+# RUN: %clang_host -g -O0 %S/Inputs/abort.c -o %t.out
+# RUN: %lldb -b -s %s %t.out | FileCheck %s
+run
+# CHECK: thread #{{.*}}stop reason = signal SIGABRT
+frame info
+# CHECK: frame #4: {{.*}}`main at abort.c
+frame recognizer info 0
+# CHECK: frame 0 is recognized by Abort StackFrame Recognizer
+q
Index: lldb/test/Shell/Recognizer/Inputs/abort.c
===================================================================
--- /dev/null
+++ lldb/test/Shell/Recognizer/Inputs/abort.c
@@ -0,0 +1,9 @@
+#include <assert.h>
+
+int main() {
+ int a = 42;
+ assert(a == 42);
+ a--;
+ assert(a == 42);
+ return 0;
+}
Index: lldb/source/Target/Thread.cpp
===================================================================
--- lldb/source/Target/Thread.cpp
+++ lldb/source/Target/Thread.cpp
@@ -573,9 +573,41 @@
m_state = state;
}
+void Thread::SelectMostRelevantFrame() {
+ if (!m_curr_frames_sp)
+ return;
+
+ auto cur_frame = m_curr_frames_sp->GetFrameAtIndex(0);
+
+ auto recognized_frame_sp = cur_frame->GetRecognizedFrame();
+
+ if (!recognized_frame_sp)
+ return;
+
+ Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TARGET);
+
+ if (StackFrameSP most_relevant_frame_sp =
+ recognized_frame_sp->GetMostRelevantFrame()) {
+ LLDB_LOG(log, "Found most relevant frame {0}",
+ most_relevant_frame_sp->GetFrameIndex());
+ SetSelectedFrame(most_relevant_frame_sp.get());
+ } else {
+ LLDB_LOG(log, "No relevant frame!");
+ }
+
+ if (StopInfoSP stop_info_sp = recognized_frame_sp->GetStopInfo()) {
+ LLDB_LOG(log, "Found stop reason {0}", stop_info_sp->GetStopReason());
+ SetStopInfo(stop_info_sp);
+ } else {
+ LLDB_LOG(log, "No stop reason for recognized frame!");
+ }
+}
+
void Thread::WillStop() {
ThreadPlan *current_plan = GetCurrentPlan();
+ SelectMostRelevantFrame();
+
// FIXME: I may decide to disallow threads with no plans. In which
// case this should go to an assert.
Index: lldb/source/Target/StopInfo.cpp
===================================================================
--- lldb/source/Target/StopInfo.cpp
+++ lldb/source/Target/StopInfo.cpp
@@ -1016,6 +1016,23 @@
}
};
+// StopInfoRecognizedFrame
+
+class StopInfoRecognizedFrame : public StopInfoException {
+public:
+ StopInfoRecognizedFrame(Thread &thread, const char *description)
+ : StopInfoException(thread, description) {}
+
+ ~StopInfoRecognizedFrame() override = default;
+
+ const char *GetDescription() override {
+ if (m_description.empty())
+ return "recognized frame:";
+ else
+ return m_description.c_str();
+ }
+};
+
// StopInfoThreadPlan
class StopInfoThreadPlan : public StopInfo {
@@ -1133,6 +1150,12 @@
return StopInfoSP(new StopInfoException(thread, description));
}
+StopInfoSP
+StopInfo::CreateStopReasonForRecognizedFrame(Thread &thread,
+ const char *description) {
+ return StopInfoSP(new StopInfoRecognizedFrame(thread, description));
+}
+
StopInfoSP StopInfo::CreateStopReasonWithExec(Thread &thread) {
return StopInfoSP(new StopInfoExec(thread));
}
Index: lldb/source/Target/StackFrameRecognizer.cpp
===================================================================
--- lldb/source/Target/StackFrameRecognizer.cpp
+++ lldb/source/Target/StackFrameRecognizer.cpp
@@ -92,7 +92,7 @@
StackFrameRecognizerSP GetRecognizerForFrame(StackFrameSP frame) {
const SymbolContext &symctx =
- frame->GetSymbolContext(eSymbolContextModule | eSymbolContextFunction);
+ frame->GetSymbolContext(eSymbolContextEverything);
ConstString function_name = symctx.GetFunctionName();
ModuleSP module_sp = symctx.module_sp;
if (!module_sp) return StackFrameRecognizerSP();
Index: lldb/source/Target/Process.cpp
===================================================================
--- lldb/source/Target/Process.cpp
+++ lldb/source/Target/Process.cpp
@@ -38,6 +38,7 @@
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/ABI.h"
+#include "lldb/Target/AbortRecognizer.h"
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Target/InstrumentationRuntime.h"
#include "lldb/Target/JITLoader.h"
@@ -538,6 +539,8 @@
target_sp->GetPlatform()->GetDefaultMemoryCacheLineSize();
if (!value_sp->OptionWasSet() && platform_cache_line_size != 0)
value_sp->SetUInt64Value(platform_cache_line_size);
+
+ RegisterAbortRecognizer(this);
}
Process::~Process() {
@@ -934,11 +937,27 @@
Debugger &debugger = process_sp->GetTarget().GetDebugger();
if (debugger.GetTargetList().GetSelectedTarget().get() ==
&process_sp->GetTarget()) {
+ ThreadSP cur_thread = process_sp->GetThreadList().GetSelectedThread();
+
+ if (!cur_thread || !cur_thread->IsValid())
+ return false;
+
+ uint32_t mrf_idx = 0;
+
+ auto frame_sp = cur_thread->GetStackFrameAtIndex(mrf_idx);
+
+ if (RecognizedStackFrameSP recognized_frame_sp =
+ frame_sp->GetRecognizedFrame())
+ if (StackFrameSP mrf_sp =
+ recognized_frame_sp->GetMostRelevantFrame())
+ mrf_idx = mrf_sp->GetFrameIndex();
+
const bool only_threads_with_stop_reason = true;
- const uint32_t start_frame = 0;
+ const uint32_t start_frame = mrf_idx;
const uint32_t num_frames = 1;
const uint32_t num_frames_with_source = 1;
const bool stop_format = true;
+
process_sp->GetStatus(*stream);
process_sp->GetThreadStatus(*stream, only_threads_with_stop_reason,
start_frame, num_frames,
Index: lldb/source/Target/CMakeLists.txt
===================================================================
--- lldb/source/Target/CMakeLists.txt
+++ lldb/source/Target/CMakeLists.txt
@@ -8,6 +8,7 @@
add_lldb_library(lldbTarget
ABI.cpp
+ AbortRecognizer.cpp
ExecutionContext.cpp
InstrumentationRuntime.cpp
InstrumentationRuntimeStopInfo.cpp
Index: lldb/source/Target/AbortRecognizer.cpp
===================================================================
--- /dev/null
+++ lldb/source/Target/AbortRecognizer.cpp
@@ -0,0 +1,174 @@
+#include "lldb/Core/Module.h"
+#include "lldb/Symbol/Function.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/StackFrameList.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/Logging.h"
+
+#include "lldb/Target/AbortRecognizer.h"
+
+using namespace llvm;
+using namespace lldb;
+using namespace lldb_private;
+
+AbortRecognizedStackFrame::AbortRecognizedStackFrame(ThreadSP thread_sp,
+ FileSpec module_spec,
+ StringRef function_name) {
+ const uint32_t frames_to_fetch = 5;
+ const uint32_t last_frame_index = frames_to_fetch - 1;
+ StackFrameSP prev_frame_sp = nullptr;
+
+ // Fetch most relevant frame
+ for (uint32_t frame_index = 0; frame_index < frames_to_fetch; frame_index++) {
+ prev_frame_sp = thread_sp->GetStackFrameAtIndex(frame_index);
+
+ if (!prev_frame_sp) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_UNWIND));
+ LLDB_LOG(log, "Abort Recognizer: Hit unwinding bound ({1} frames)!",
+ frames_to_fetch);
+ break;
+ }
+
+ SymbolContext sym_ctx =
+ prev_frame_sp->GetSymbolContext(eSymbolContextEverything);
+
+ if (sym_ctx.module_sp->GetFileSpec().FileEquals(module_spec) &&
+ sym_ctx.GetFunctionName() == ConstString(function_name)) {
+ m_most_relevant_frame = thread_sp->GetStackFrameAtIndex(
+ std::min(frame_index + 1, last_frame_index));
+ break;
+ }
+ }
+
+ // FIXME: This breaks several tests.
+ // m_stop_info_sp = StopInfo::CreateStopReasonForRecognizedFrame(
+ // *thread_sp.get(), "hit program assert");
+
+ m_stop_info_sp = nullptr;
+}
+
+lldb::RecognizedStackFrameSP
+AbortFrameRecognizer::RecognizeFrame(lldb::StackFrameSP frame) {
+ // Check if called with Frame #0
+ if (frame->GetFrameIndex())
+ return RecognizedStackFrameSP();
+
+ ThreadSP thread_sp = frame->GetThread();
+ ProcessSP process_sp = thread_sp->GetProcess();
+
+ // Fetch abort location
+ auto abort_location = GetAbortLocation(process_sp.get());
+
+ if (!abort_location.hasValue())
+ return RecognizedStackFrameSP();
+
+ FileSpec module_spec;
+ StringRef function_name;
+ std::tie(module_spec, function_name) = *abort_location;
+
+ SymbolContext sc = frame->GetSymbolContext(eSymbolContextModule);
+
+ // Check if frame is in abort module
+ if (!sc.module_sp ||
+ sc.module_sp->GetFileSpec().GetFilename() != module_spec.GetFilename())
+ return RecognizedStackFrameSP();
+
+ // Fetch assert location
+ auto assert_location = GetAssertLocation(process_sp.get());
+
+ if (!assert_location.hasValue())
+ return RecognizedStackFrameSP();
+
+ std::tie(module_spec, function_name) = *assert_location;
+
+ // Pass assert location to AbortRecognizedStackFrame to set as most relevant
+ // frame.
+ return lldb::RecognizedStackFrameSP(
+ new AbortRecognizedStackFrame(thread_sp, module_spec, function_name));
+};
+
+lldb::StackFrameSP AbortRecognizedStackFrame::GetMostRelevantFrame() {
+ return m_most_relevant_frame;
+}
+
+lldb::StopInfoSP AbortRecognizedStackFrame::GetStopInfo() {
+ return m_stop_info_sp;
+}
+
+namespace lldb_private {
+
+void RegisterAbortRecognizer(Process *process) {
+ static llvm::once_flag g_once_flag;
+ llvm::call_once(g_once_flag, [process]() {
+ auto abort_location = GetAbortLocation(process);
+
+ if (!abort_location.hasValue())
+ return;
+
+ FileSpec module_spec;
+ StringRef function_name;
+ std::tie(module_spec, function_name) = *abort_location;
+
+ StackFrameRecognizerManager::AddRecognizer(
+ StackFrameRecognizerSP(new AbortFrameRecognizer()),
+ module_spec.GetFilename(), ConstString(function_name), false);
+ });
+}
+
+llvm::Optional<std::tuple<FileSpec, StringRef>>
+GetAbortLocation(Process *process) {
+ Target &target = process->GetTarget();
+
+ std::string module_name;
+ StringRef symbol_name;
+
+ switch (target.GetArchitecture().GetTriple().getOS()) {
+ case llvm::Triple::Darwin:
+ case llvm::Triple::MacOSX:
+ module_name = "libsystem_kernel.dylib";
+ symbol_name = "__pthread_kill";
+ break;
+ case llvm::Triple::Linux:
+ module_name = "libc.so.6";
+ symbol_name = "__GI_raise";
+ break;
+ default:
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_UNWIND));
+ LLDB_LOG(log, "Abort Recognizer::GetAbortLocation Unsupported OS");
+ return llvm::None;
+ }
+
+ return std::make_tuple(FileSpec(module_name), symbol_name);
+}
+
+llvm::Optional<std::tuple<FileSpec, StringRef>>
+GetAssertLocation(Process *process) {
+ Target &target = process->GetTarget();
+
+ std::string module_name;
+ StringRef symbol_name;
+
+ switch (target.GetArchitecture().GetTriple().getOS()) {
+ case llvm::Triple::Darwin:
+ case llvm::Triple::MacOSX:
+ module_name = "libsystem_c.dylib";
+ symbol_name = "__assert_rtn";
+ break;
+ case llvm::Triple::Linux:
+ module_name = "libc.so.6";
+ symbol_name = "__GI___assert_fail";
+ break;
+ default:
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_UNWIND));
+ LLDB_LOG(log, "Abort Recognizer::GetAbortLocation Unsupported OS");
+ return llvm::None;
+ }
+
+ return std::make_tuple(FileSpec(module_name), symbol_name);
+}
+
+} // namespace lldb_private
Index: lldb/include/lldb/Target/Thread.h
===================================================================
--- lldb/include/lldb/Target/Thread.h
+++ lldb/include/lldb/Target/Thread.h
@@ -216,6 +216,8 @@
virtual void RefreshStateAfterStop() = 0;
+ void SelectMostRelevantFrame();
+
void WillStop();
bool ShouldStop(Event *event_ptr);
Index: lldb/include/lldb/Target/StopInfo.h
===================================================================
--- lldb/include/lldb/Target/StopInfo.h
+++ lldb/include/lldb/Target/StopInfo.h
@@ -127,6 +127,9 @@
static lldb::StopInfoSP
CreateStopReasonWithException(Thread &thread, const char *description);
+ static lldb::StopInfoSP
+ CreateStopReasonForRecognizedFrame(Thread &thread, const char *description);
+
static lldb::StopInfoSP CreateStopReasonWithExec(Thread &thread);
static lldb::ValueObjectSP
Index: lldb/include/lldb/Target/StackFrameRecognizer.h
===================================================================
--- lldb/include/lldb/Target/StackFrameRecognizer.h
+++ lldb/include/lldb/Target/StackFrameRecognizer.h
@@ -12,6 +12,7 @@
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectList.h"
#include "lldb/Symbol/VariableList.h"
+#include "lldb/Target/StopInfo.h"
#include "lldb/Utility/StructuredData.h"
#include "lldb/lldb-private-forward.h"
#include "lldb/lldb-public.h"
@@ -33,6 +34,8 @@
virtual lldb::ValueObjectSP GetExceptionObject() {
return lldb::ValueObjectSP();
}
+ virtual lldb::StackFrameSP GetMostRelevantFrame() { return nullptr; };
+ virtual lldb::StopInfoSP GetStopInfo() { return nullptr; }
virtual ~RecognizedStackFrame(){};
protected:
Index: lldb/include/lldb/Target/AbortRecognizer.h
===================================================================
--- /dev/null
+++ lldb/include/lldb/Target/AbortRecognizer.h
@@ -0,0 +1,52 @@
+//===-- AbortRecognizer.cpp -------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_AbortRegognizer_h_
+#define liblldb_AbortRegognizer_h_
+
+#include "lldb/Target/Process.h"
+#include "lldb/Target/StackFrameRecognizer.h"
+#include "lldb/Utility/ConstString.h"
+#include "lldb/Utility/FileSpec.h"
+
+#include <tuple>
+
+namespace lldb_private {
+
+void RegisterAbortRecognizer(Process *process);
+
+llvm::Optional<std::tuple<FileSpec, llvm::StringRef>>
+GetAbortLocation(Process *process_sp);
+
+llvm::Optional<std::tuple<FileSpec, llvm::StringRef>>
+GetAssertLocation(Process *process_sp);
+
+#pragma mark Frame recognizers
+
+class AbortRecognizedStackFrame : public RecognizedStackFrame {
+public:
+ AbortRecognizedStackFrame(lldb::ThreadSP thread_sp, FileSpec module_spec,
+ llvm::StringRef function_name);
+ lldb::StackFrameSP GetMostRelevantFrame() override;
+ lldb::StopInfoSP GetStopInfo() override;
+
+private:
+ lldb::StackFrameSP m_most_relevant_frame;
+ lldb::StopInfoSP m_stop_info_sp;
+};
+
+class AbortFrameRecognizer : public StackFrameRecognizer {
+public:
+ std::string GetName() override { return "Abort StackFrame Recognizer"; }
+ lldb::RecognizedStackFrameSP
+ RecognizeFrame(lldb::StackFrameSP frame) override;
+};
+
+} // namespace lldb_private
+
+#endif // liblldb_AbortRecognizer_h_
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