adabc83a92
The macos and sysv ABIs return functionally equivalent unwind plans, so they can be implemented in the base AArch64 class. The only difference between them was that the macos plan provided a "pc=lr" rule whereas the sysv plan called SetReturnAddressRegister (which causes the unwind machinery to act as if that rule was present). This difference was enough to cause `CompareUnwindPlansForIdenticalInitialPCLocation` to return a different value and break the (temporarily reverted) TestUnwindFramelessFaulted test. While merging the two functions, I couldn't stop myself from simplifying them to use the generic register number schemes -- which exposed another bug in CompareUnwindPlansForIdenticalInitialPCLocation, namely that it was expecting all unwind plans to use the LLDB numbering scheme. This patch fixes that as well.
530 lines
21 KiB
C++
530 lines
21 KiB
C++
//===-- FuncUnwinders.cpp -------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Symbol/FuncUnwinders.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/AddressRange.h"
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#include "lldb/Symbol/ArmUnwindInfo.h"
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#include "lldb/Symbol/CallFrameInfo.h"
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#include "lldb/Symbol/CompactUnwindInfo.h"
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#include "lldb/Symbol/DWARFCallFrameInfo.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Symbol/UnwindPlan.h"
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#include "lldb/Symbol/UnwindTable.h"
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#include "lldb/Target/ABI.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/RegisterNumber.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/UnwindAssembly.h"
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#include <memory>
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using namespace lldb;
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using namespace lldb_private;
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static AddressRange CollapseRanges(llvm::ArrayRef<AddressRange> ranges) {
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if (ranges.empty())
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return AddressRange();
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if (ranges.size() == 1)
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return ranges[0];
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Address lowest_addr = ranges[0].GetBaseAddress();
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addr_t highest_addr = lowest_addr.GetFileAddress() + ranges[0].GetByteSize();
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for (const AddressRange &range : ranges.drop_front()) {
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Address range_begin = range.GetBaseAddress();
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addr_t range_end = range_begin.GetFileAddress() + range.GetByteSize();
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if (range_begin.GetFileAddress() < lowest_addr.GetFileAddress())
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lowest_addr = range_begin;
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if (range_end > highest_addr)
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highest_addr = range_end;
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}
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return AddressRange(lowest_addr, highest_addr - lowest_addr.GetFileAddress());
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}
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FuncUnwinders::FuncUnwinders(UnwindTable &unwind_table, Address addr,
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AddressRanges ranges)
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: m_unwind_table(unwind_table), m_addr(std::move(addr)),
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m_ranges(std::move(ranges)), m_range(CollapseRanges(m_ranges)),
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m_tried_unwind_plan_assembly(false), m_tried_unwind_plan_eh_frame(false),
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m_tried_unwind_plan_object_file(false),
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m_tried_unwind_plan_debug_frame(false),
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m_tried_unwind_plan_object_file_augmented(false),
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m_tried_unwind_plan_eh_frame_augmented(false),
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m_tried_unwind_plan_debug_frame_augmented(false),
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m_tried_unwind_plan_compact_unwind(false),
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m_tried_unwind_plan_arm_unwind(false),
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m_tried_unwind_plan_symbol_file(false), m_tried_unwind_fast(false),
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m_tried_unwind_arch_default(false),
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m_tried_unwind_arch_default_at_func_entry(false),
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m_first_non_prologue_insn() {}
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/// destructor
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FuncUnwinders::~FuncUnwinders() = default;
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetUnwindPlanAtCallSite(Target &target, Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (std::shared_ptr<const UnwindPlan> plan_sp =
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GetObjectFileUnwindPlan(target))
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return plan_sp;
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if (std::shared_ptr<const UnwindPlan> plan_sp =
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GetSymbolFileUnwindPlan(thread))
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return plan_sp;
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if (std::shared_ptr<const UnwindPlan> plan_sp =
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GetDebugFrameUnwindPlan(target))
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return plan_sp;
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if (std::shared_ptr<const UnwindPlan> plan_sp = GetEHFrameUnwindPlan(target))
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return plan_sp;
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if (std::shared_ptr<const UnwindPlan> plan_sp =
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GetCompactUnwindUnwindPlan(target))
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return plan_sp;
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if (std::shared_ptr<const UnwindPlan> plan_sp =
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GetArmUnwindUnwindPlan(target))
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return plan_sp;
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return nullptr;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetCompactUnwindUnwindPlan(Target &target) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_compact_unwind.size() > 0)
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return m_unwind_plan_compact_unwind[0]; // FIXME support multiple compact
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// unwind plans for one func
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if (m_tried_unwind_plan_compact_unwind)
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return nullptr;
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m_tried_unwind_plan_compact_unwind = true;
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if (m_range.GetBaseAddress().IsValid()) {
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Address current_pc(m_range.GetBaseAddress());
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CompactUnwindInfo *compact_unwind = m_unwind_table.GetCompactUnwindInfo();
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if (compact_unwind) {
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auto unwind_plan_sp =
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std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
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if (compact_unwind->GetUnwindPlan(target, current_pc, *unwind_plan_sp)) {
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m_unwind_plan_compact_unwind.push_back(unwind_plan_sp);
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return m_unwind_plan_compact_unwind[0]; // FIXME support multiple
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// compact unwind plans for one
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// func
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}
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}
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}
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return nullptr;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetObjectFileUnwindPlan(Target &target) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_object_file_sp.get() ||
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m_tried_unwind_plan_object_file)
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return m_unwind_plan_object_file_sp;
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m_tried_unwind_plan_object_file = true;
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if (m_range.GetBaseAddress().IsValid()) {
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CallFrameInfo *object_file_frame = m_unwind_table.GetObjectFileUnwindInfo();
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if (object_file_frame) {
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auto plan_sp = std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
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if (object_file_frame->GetUnwindPlan(m_range, *plan_sp))
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m_unwind_plan_object_file_sp = std::move(plan_sp);
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}
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}
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return m_unwind_plan_object_file_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetEHFrameUnwindPlan(Target &target) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_eh_frame_sp.get() || m_tried_unwind_plan_eh_frame)
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return m_unwind_plan_eh_frame_sp;
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m_tried_unwind_plan_eh_frame = true;
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if (m_addr.IsValid()) {
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if (DWARFCallFrameInfo *eh_frame = m_unwind_table.GetEHFrameInfo())
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m_unwind_plan_eh_frame_sp = eh_frame->GetUnwindPlan(m_ranges, m_addr);
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}
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return m_unwind_plan_eh_frame_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetDebugFrameUnwindPlan(Target &target) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_debug_frame_sp || m_tried_unwind_plan_debug_frame)
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return m_unwind_plan_debug_frame_sp;
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m_tried_unwind_plan_debug_frame = true;
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if (!m_ranges.empty()) {
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if (DWARFCallFrameInfo *debug_frame = m_unwind_table.GetDebugFrameInfo())
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m_unwind_plan_debug_frame_sp =
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debug_frame->GetUnwindPlan(m_ranges, m_addr);
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}
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return m_unwind_plan_debug_frame_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetArmUnwindUnwindPlan(Target &target) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_arm_unwind_sp.get() || m_tried_unwind_plan_arm_unwind)
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return m_unwind_plan_arm_unwind_sp;
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m_tried_unwind_plan_arm_unwind = true;
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if (m_range.GetBaseAddress().IsValid()) {
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Address current_pc(m_range.GetBaseAddress());
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ArmUnwindInfo *arm_unwind_info = m_unwind_table.GetArmUnwindInfo();
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if (arm_unwind_info) {
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auto plan_sp = std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
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if (arm_unwind_info->GetUnwindPlan(target, current_pc, *plan_sp))
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m_unwind_plan_arm_unwind_sp = std::move(plan_sp);
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}
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}
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return m_unwind_plan_arm_unwind_sp;
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}
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namespace {
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class RegisterContextToInfo: public SymbolFile::RegisterInfoResolver {
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public:
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RegisterContextToInfo(RegisterContext &ctx) : m_ctx(ctx) {}
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const RegisterInfo *ResolveName(llvm::StringRef name) const override {
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return m_ctx.GetRegisterInfoByName(name);
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}
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const RegisterInfo *ResolveNumber(lldb::RegisterKind kind,
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uint32_t number) const override {
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return m_ctx.GetRegisterInfo(kind, number);
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}
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private:
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RegisterContext &m_ctx;
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};
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} // namespace
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetSymbolFileUnwindPlan(Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_symbol_file_sp.get() || m_tried_unwind_plan_symbol_file)
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return m_unwind_plan_symbol_file_sp;
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m_tried_unwind_plan_symbol_file = true;
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if (SymbolFile *symfile = m_unwind_table.GetSymbolFile()) {
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m_unwind_plan_symbol_file_sp = symfile->GetUnwindPlan(
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m_range.GetBaseAddress(),
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RegisterContextToInfo(*thread.GetRegisterContext()));
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}
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return m_unwind_plan_symbol_file_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetObjectFileAugmentedUnwindPlan(Target &target,
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Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_object_file_augmented_sp.get() ||
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m_tried_unwind_plan_object_file_augmented)
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return m_unwind_plan_object_file_augmented_sp;
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m_tried_unwind_plan_object_file_augmented = true;
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std::shared_ptr<const UnwindPlan> object_file_unwind_plan =
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GetObjectFileUnwindPlan(target);
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if (!object_file_unwind_plan)
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return m_unwind_plan_object_file_augmented_sp;
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// Augment the instructions with epilogue descriptions if necessary
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// so the UnwindPlan can be used at any instruction in the function.
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UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
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if (assembly_profiler_sp) {
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auto plan_sp = std::make_shared<UnwindPlan>(*object_file_unwind_plan);
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if (assembly_profiler_sp->AugmentUnwindPlanFromCallSite(m_range, thread,
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*plan_sp))
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m_unwind_plan_object_file_augmented_sp = std::move(plan_sp);
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}
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return m_unwind_plan_object_file_augmented_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetEHFrameAugmentedUnwindPlan(Target &target, Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_eh_frame_augmented_sp.get() ||
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m_tried_unwind_plan_eh_frame_augmented)
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return m_unwind_plan_eh_frame_augmented_sp;
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// Only supported on x86 architectures where we get eh_frame from the
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// compiler that describes the prologue instructions perfectly, and sometimes
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// the epilogue instructions too.
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if (target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_32_i386 &&
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target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_64_x86_64 &&
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target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_64_x86_64h) {
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m_tried_unwind_plan_eh_frame_augmented = true;
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return m_unwind_plan_eh_frame_augmented_sp;
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}
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m_tried_unwind_plan_eh_frame_augmented = true;
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std::shared_ptr<const UnwindPlan> eh_frame_plan =
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GetEHFrameUnwindPlan(target);
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if (!eh_frame_plan)
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return m_unwind_plan_eh_frame_augmented_sp;
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// Augment the eh_frame instructions with epilogue descriptions if necessary
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// so the UnwindPlan can be used at any instruction in the function.
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UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
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if (assembly_profiler_sp) {
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auto plan_sp = std::make_shared<UnwindPlan>(*eh_frame_plan);
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if (assembly_profiler_sp->AugmentUnwindPlanFromCallSite(m_range, thread,
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*plan_sp))
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m_unwind_plan_eh_frame_augmented_sp = std::move(plan_sp);
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}
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return m_unwind_plan_eh_frame_augmented_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetDebugFrameAugmentedUnwindPlan(Target &target,
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Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_debug_frame_augmented_sp.get() ||
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m_tried_unwind_plan_debug_frame_augmented)
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return m_unwind_plan_debug_frame_augmented_sp;
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// Only supported on x86 architectures where we get debug_frame from the
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// compiler that describes the prologue instructions perfectly, and sometimes
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// the epilogue instructions too.
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if (target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_32_i386 &&
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target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_64_x86_64 &&
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target.GetArchitecture().GetCore() != ArchSpec::eCore_x86_64_x86_64h) {
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m_tried_unwind_plan_debug_frame_augmented = true;
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return m_unwind_plan_debug_frame_augmented_sp;
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}
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m_tried_unwind_plan_debug_frame_augmented = true;
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std::shared_ptr<const UnwindPlan> debug_frame_plan =
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GetDebugFrameUnwindPlan(target);
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if (!debug_frame_plan)
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return m_unwind_plan_debug_frame_augmented_sp;
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// Augment the debug_frame instructions with epilogue descriptions if
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// necessary so the UnwindPlan can be used at any instruction in the
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// function.
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UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
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if (assembly_profiler_sp) {
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auto plan_sp = std::make_shared<UnwindPlan>(*debug_frame_plan);
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if (assembly_profiler_sp->AugmentUnwindPlanFromCallSite(m_range, thread,
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*plan_sp))
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m_unwind_plan_debug_frame_augmented_sp = std::move(plan_sp);
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}
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return m_unwind_plan_debug_frame_augmented_sp;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetAssemblyUnwindPlan(Target &target, Thread &thread) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_unwind_plan_assembly_sp.get() || m_tried_unwind_plan_assembly ||
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!m_unwind_table.GetAllowAssemblyEmulationUnwindPlans()) {
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return m_unwind_plan_assembly_sp;
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}
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m_tried_unwind_plan_assembly = true;
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// Don't analyze more than 10 megabytes of instructions,
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// if a function is legitimately larger than that, we'll
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// miss the epilogue instructions, but guard against a
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// bogusly large function and analyzing large amounts of
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// non-instruction data.
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AddressRange range = m_range;
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const addr_t func_size =
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std::min(range.GetByteSize(), (addr_t)1024 * 10 * 10);
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range.SetByteSize(func_size);
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UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
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if (assembly_profiler_sp) {
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auto plan_sp = std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
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if (assembly_profiler_sp->GetNonCallSiteUnwindPlanFromAssembly(
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range, thread, *plan_sp))
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m_unwind_plan_assembly_sp = std::move(plan_sp);
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}
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return m_unwind_plan_assembly_sp;
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}
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// This method compares the pc unwind rule in the first row of two UnwindPlans.
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// If they have the same way of getting the pc value (e.g. "CFA - 8" + "CFA is
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// sp"), then it will return LazyBoolTrue.
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LazyBool FuncUnwinders::CompareUnwindPlansForIdenticalInitialPCLocation(
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Thread &thread, const std::shared_ptr<const UnwindPlan> &a,
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const std::shared_ptr<const UnwindPlan> &b) {
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if (!a || !b)
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return eLazyBoolCalculate;
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const UnwindPlan::Row *a_first_row = a->GetRowAtIndex(0);
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const UnwindPlan::Row *b_first_row = b->GetRowAtIndex(0);
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if (!a_first_row || !b_first_row)
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return eLazyBoolCalculate;
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RegisterNumber pc_reg(thread, eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
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uint32_t a_pc_regnum = pc_reg.GetAsKind(a->GetRegisterKind());
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uint32_t b_pc_regnum = pc_reg.GetAsKind(b->GetRegisterKind());
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UnwindPlan::Row::AbstractRegisterLocation a_pc_regloc;
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UnwindPlan::Row::AbstractRegisterLocation b_pc_regloc;
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a_first_row->GetRegisterInfo(a_pc_regnum, a_pc_regloc);
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b_first_row->GetRegisterInfo(b_pc_regnum, b_pc_regloc);
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if (a_first_row->GetCFAValue() != b_first_row->GetCFAValue())
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return eLazyBoolNo;
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if (a_pc_regloc != b_pc_regloc)
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return eLazyBoolNo;
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return eLazyBoolYes;
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}
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std::shared_ptr<const UnwindPlan>
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FuncUnwinders::GetUnwindPlanAtNonCallSite(Target &target, Thread &thread) {
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std::shared_ptr<const UnwindPlan> eh_frame_sp = GetEHFrameUnwindPlan(target);
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if (!eh_frame_sp)
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eh_frame_sp = GetDebugFrameUnwindPlan(target);
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if (!eh_frame_sp)
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eh_frame_sp = GetObjectFileUnwindPlan(target);
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std::shared_ptr<const UnwindPlan> arch_default_at_entry_sp =
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GetUnwindPlanArchitectureDefaultAtFunctionEntry(thread);
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std::shared_ptr<const UnwindPlan> arch_default_sp =
|
|
GetUnwindPlanArchitectureDefault(thread);
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|
std::shared_ptr<const UnwindPlan> assembly_sp =
|
|
GetAssemblyUnwindPlan(target, thread);
|
|
|
|
// This point of this code is to detect when a function is using a non-
|
|
// standard ABI, and the eh_frame correctly describes that alternate ABI.
|
|
// This is addressing a specific situation on x86_64 linux systems where one
|
|
// function in a library pushes a value on the stack and jumps to another
|
|
// function. So using an assembly instruction based unwind will not work
|
|
// when you're in the second function - the stack has been modified in a non-
|
|
// ABI way. But we have eh_frame that correctly describes how to unwind from
|
|
// this location. So we're looking to see if the initial pc register save
|
|
// location from the eh_frame is different from the assembly unwind, the arch
|
|
// default unwind, and the arch default at initial function entry.
|
|
//
|
|
// We may have eh_frame that describes the entire function -- or we may have
|
|
// eh_frame that only describes the unwind after the prologue has executed --
|
|
// so we need to check both the arch default (once the prologue has executed)
|
|
// and the arch default at initial function entry. And we may be running on
|
|
// a target where we have only some of the assembly/arch default unwind plans
|
|
// available.
|
|
|
|
if (CompareUnwindPlansForIdenticalInitialPCLocation(
|
|
thread, eh_frame_sp, arch_default_at_entry_sp) == eLazyBoolNo &&
|
|
CompareUnwindPlansForIdenticalInitialPCLocation(
|
|
thread, eh_frame_sp, arch_default_sp) == eLazyBoolNo &&
|
|
CompareUnwindPlansForIdenticalInitialPCLocation(
|
|
thread, assembly_sp, arch_default_sp) == eLazyBoolNo) {
|
|
return eh_frame_sp;
|
|
}
|
|
|
|
if (std::shared_ptr<const UnwindPlan> plan_sp =
|
|
GetSymbolFileUnwindPlan(thread))
|
|
return plan_sp;
|
|
if (std::shared_ptr<const UnwindPlan> plan_sp =
|
|
GetDebugFrameAugmentedUnwindPlan(target, thread))
|
|
return plan_sp;
|
|
if (std::shared_ptr<const UnwindPlan> plan_sp =
|
|
GetEHFrameAugmentedUnwindPlan(target, thread))
|
|
return plan_sp;
|
|
if (std::shared_ptr<const UnwindPlan> plan_sp =
|
|
GetObjectFileAugmentedUnwindPlan(target, thread))
|
|
return plan_sp;
|
|
|
|
return assembly_sp;
|
|
}
|
|
|
|
std::shared_ptr<const UnwindPlan>
|
|
FuncUnwinders::GetUnwindPlanFastUnwind(Target &target, Thread &thread) {
|
|
std::lock_guard<std::recursive_mutex> guard(m_mutex);
|
|
if (m_unwind_plan_fast_sp.get() || m_tried_unwind_fast)
|
|
return m_unwind_plan_fast_sp;
|
|
|
|
m_tried_unwind_fast = true;
|
|
|
|
UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
|
|
if (assembly_profiler_sp) {
|
|
auto plan_sp = std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
|
|
if (assembly_profiler_sp->GetFastUnwindPlan(m_range, thread, *plan_sp))
|
|
m_unwind_plan_fast_sp = std::move(plan_sp);
|
|
}
|
|
return m_unwind_plan_fast_sp;
|
|
}
|
|
|
|
std::shared_ptr<const UnwindPlan>
|
|
FuncUnwinders::GetUnwindPlanArchitectureDefault(Thread &thread) {
|
|
std::lock_guard<std::recursive_mutex> guard(m_mutex);
|
|
if (m_unwind_plan_arch_default_sp.get() || m_tried_unwind_arch_default)
|
|
return m_unwind_plan_arch_default_sp;
|
|
|
|
m_tried_unwind_arch_default = true;
|
|
|
|
ProcessSP process_sp(thread.CalculateProcess());
|
|
if (process_sp) {
|
|
if (ABI *abi = process_sp->GetABI().get())
|
|
m_unwind_plan_arch_default_sp = abi->CreateDefaultUnwindPlan();
|
|
}
|
|
|
|
return m_unwind_plan_arch_default_sp;
|
|
}
|
|
|
|
std::shared_ptr<const UnwindPlan>
|
|
FuncUnwinders::GetUnwindPlanArchitectureDefaultAtFunctionEntry(Thread &thread) {
|
|
std::lock_guard<std::recursive_mutex> guard(m_mutex);
|
|
if (m_unwind_plan_arch_default_at_func_entry_sp.get() ||
|
|
m_tried_unwind_arch_default_at_func_entry)
|
|
return m_unwind_plan_arch_default_at_func_entry_sp;
|
|
|
|
m_tried_unwind_arch_default_at_func_entry = true;
|
|
|
|
Address current_pc;
|
|
ProcessSP process_sp(thread.CalculateProcess());
|
|
if (process_sp) {
|
|
if (ABI *abi = process_sp->GetABI().get()) {
|
|
m_unwind_plan_arch_default_at_func_entry_sp =
|
|
abi->CreateFunctionEntryUnwindPlan();
|
|
}
|
|
}
|
|
|
|
return m_unwind_plan_arch_default_at_func_entry_sp;
|
|
}
|
|
|
|
Address &FuncUnwinders::GetFirstNonPrologueInsn(Target &target) {
|
|
std::lock_guard<std::recursive_mutex> guard(m_mutex);
|
|
if (m_first_non_prologue_insn.IsValid())
|
|
return m_first_non_prologue_insn;
|
|
|
|
ExecutionContext exe_ctx(target.shared_from_this(), false);
|
|
UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
|
|
if (assembly_profiler_sp)
|
|
assembly_profiler_sp->FirstNonPrologueInsn(m_range, exe_ctx,
|
|
m_first_non_prologue_insn);
|
|
return m_first_non_prologue_insn;
|
|
}
|
|
|
|
const Address &FuncUnwinders::GetFunctionStartAddress() const { return m_addr; }
|
|
|
|
lldb::UnwindAssemblySP
|
|
FuncUnwinders::GetUnwindAssemblyProfiler(Target &target) {
|
|
UnwindAssemblySP assembly_profiler_sp;
|
|
if (ArchSpec arch = m_unwind_table.GetArchitecture()) {
|
|
arch.MergeFrom(target.GetArchitecture());
|
|
assembly_profiler_sp = UnwindAssembly::FindPlugin(arch);
|
|
}
|
|
return assembly_profiler_sp;
|
|
}
|