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-rw-r--r--source/Symbol/FuncUnwinders.cpp164
1 files changed, 90 insertions, 74 deletions
diff --git a/source/Symbol/FuncUnwinders.cpp b/source/Symbol/FuncUnwinders.cpp
index 35ce72f32b61e..09cb9b00aaf3b 100644
--- a/source/Symbol/FuncUnwinders.cpp
+++ b/source/Symbol/FuncUnwinders.cpp
@@ -1,9 +1,8 @@
//===-- FuncUnwinders.cpp ----------------------------------*- C++ -*-===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
//
//===----------------------------------------------------------------------===//
@@ -14,22 +13,24 @@
#include "lldb/Symbol/CompactUnwindInfo.h"
#include "lldb/Symbol/DWARFCallFrameInfo.h"
#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/UnwindPlan.h"
#include "lldb/Symbol/UnwindTable.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/RegisterNumber.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/UnwindAssembly.h"
+#include <memory>
+
using namespace lldb;
using namespace lldb_private;
-//------------------------------------------------
/// constructor
-//------------------------------------------------
FuncUnwinders::FuncUnwinders(UnwindTable &unwind_table, AddressRange range)
: m_unwind_table(unwind_table), m_range(range), m_mutex(),
@@ -43,35 +44,35 @@ FuncUnwinders::FuncUnwinders(UnwindTable &unwind_table, AddressRange range)
m_tried_unwind_plan_eh_frame_augmented(false),
m_tried_unwind_plan_debug_frame_augmented(false),
m_tried_unwind_plan_compact_unwind(false),
- m_tried_unwind_plan_arm_unwind(false), m_tried_unwind_fast(false),
+ m_tried_unwind_plan_arm_unwind(false),
+ m_tried_unwind_plan_symbol_file(false), m_tried_unwind_fast(false),
m_tried_unwind_arch_default(false),
m_tried_unwind_arch_default_at_func_entry(false),
m_first_non_prologue_insn() {}
-//------------------------------------------------
/// destructor
-//------------------------------------------------
FuncUnwinders::~FuncUnwinders() {}
UnwindPlanSP FuncUnwinders::GetUnwindPlanAtCallSite(Target &target,
- int current_offset) {
+ Thread &thread) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
- if (UnwindPlanSP plan_sp = GetEHFrameUnwindPlan(target, current_offset))
+ if (UnwindPlanSP plan_sp = GetSymbolFileUnwindPlan(thread))
return plan_sp;
- if (UnwindPlanSP plan_sp = GetDebugFrameUnwindPlan(target, current_offset))
+ if (UnwindPlanSP plan_sp = GetDebugFrameUnwindPlan(target))
return plan_sp;
- if (UnwindPlanSP plan_sp = GetCompactUnwindUnwindPlan(target, current_offset))
+ if (UnwindPlanSP plan_sp = GetEHFrameUnwindPlan(target))
return plan_sp;
- if (UnwindPlanSP plan_sp = GetArmUnwindUnwindPlan(target, current_offset))
+ if (UnwindPlanSP plan_sp = GetCompactUnwindUnwindPlan(target))
+ return plan_sp;
+ if (UnwindPlanSP plan_sp = GetArmUnwindUnwindPlan(target))
return plan_sp;
return nullptr;
}
-UnwindPlanSP FuncUnwinders::GetCompactUnwindUnwindPlan(Target &target,
- int current_offset) {
+UnwindPlanSP FuncUnwinders::GetCompactUnwindUnwindPlan(Target &target) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_compact_unwind.size() > 0)
return m_unwind_plan_compact_unwind[0]; // FIXME support multiple compact
@@ -82,8 +83,6 @@ UnwindPlanSP FuncUnwinders::GetCompactUnwindUnwindPlan(Target &target,
m_tried_unwind_plan_compact_unwind = true;
if (m_range.GetBaseAddress().IsValid()) {
Address current_pc(m_range.GetBaseAddress());
- if (current_offset != -1)
- current_pc.SetOffset(current_pc.GetOffset() + current_offset);
CompactUnwindInfo *compact_unwind = m_unwind_table.GetCompactUnwindInfo();
if (compact_unwind) {
UnwindPlanSP unwind_plan_sp(new UnwindPlan(lldb::eRegisterKindGeneric));
@@ -98,53 +97,43 @@ UnwindPlanSP FuncUnwinders::GetCompactUnwindUnwindPlan(Target &target,
return UnwindPlanSP();
}
-UnwindPlanSP FuncUnwinders::GetEHFrameUnwindPlan(Target &target,
- int current_offset) {
+UnwindPlanSP FuncUnwinders::GetEHFrameUnwindPlan(Target &target) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_eh_frame_sp.get() || m_tried_unwind_plan_eh_frame)
return m_unwind_plan_eh_frame_sp;
m_tried_unwind_plan_eh_frame = true;
if (m_range.GetBaseAddress().IsValid()) {
- Address current_pc(m_range.GetBaseAddress());
- if (current_offset != -1)
- current_pc.SetOffset(current_pc.GetOffset() + current_offset);
DWARFCallFrameInfo *eh_frame = m_unwind_table.GetEHFrameInfo();
if (eh_frame) {
- m_unwind_plan_eh_frame_sp.reset(
- new UnwindPlan(lldb::eRegisterKindGeneric));
- if (!eh_frame->GetUnwindPlan(current_pc, *m_unwind_plan_eh_frame_sp))
+ m_unwind_plan_eh_frame_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
+ if (!eh_frame->GetUnwindPlan(m_range, *m_unwind_plan_eh_frame_sp))
m_unwind_plan_eh_frame_sp.reset();
}
}
return m_unwind_plan_eh_frame_sp;
}
-UnwindPlanSP FuncUnwinders::GetDebugFrameUnwindPlan(Target &target,
- int current_offset) {
+UnwindPlanSP FuncUnwinders::GetDebugFrameUnwindPlan(Target &target) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_debug_frame_sp || m_tried_unwind_plan_debug_frame)
return m_unwind_plan_debug_frame_sp;
m_tried_unwind_plan_debug_frame = true;
if (m_range.GetBaseAddress().IsValid()) {
- Address current_pc(m_range.GetBaseAddress());
- if (current_offset != -1)
- current_pc.SetOffset(current_pc.GetOffset() + current_offset);
DWARFCallFrameInfo *debug_frame = m_unwind_table.GetDebugFrameInfo();
if (debug_frame) {
- m_unwind_plan_debug_frame_sp.reset(
- new UnwindPlan(lldb::eRegisterKindGeneric));
- if (!debug_frame->GetUnwindPlan(current_pc,
- *m_unwind_plan_debug_frame_sp))
+ m_unwind_plan_debug_frame_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
+ if (!debug_frame->GetUnwindPlan(m_range, *m_unwind_plan_debug_frame_sp))
m_unwind_plan_debug_frame_sp.reset();
}
}
return m_unwind_plan_debug_frame_sp;
}
-UnwindPlanSP FuncUnwinders::GetArmUnwindUnwindPlan(Target &target,
- int current_offset) {
+UnwindPlanSP FuncUnwinders::GetArmUnwindUnwindPlan(Target &target) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_arm_unwind_sp.get() || m_tried_unwind_plan_arm_unwind)
return m_unwind_plan_arm_unwind_sp;
@@ -152,12 +141,10 @@ UnwindPlanSP FuncUnwinders::GetArmUnwindUnwindPlan(Target &target,
m_tried_unwind_plan_arm_unwind = true;
if (m_range.GetBaseAddress().IsValid()) {
Address current_pc(m_range.GetBaseAddress());
- if (current_offset != -1)
- current_pc.SetOffset(current_pc.GetOffset() + current_offset);
ArmUnwindInfo *arm_unwind_info = m_unwind_table.GetArmUnwindInfo();
if (arm_unwind_info) {
- m_unwind_plan_arm_unwind_sp.reset(
- new UnwindPlan(lldb::eRegisterKindGeneric));
+ m_unwind_plan_arm_unwind_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
if (!arm_unwind_info->GetUnwindPlan(target, current_pc,
*m_unwind_plan_arm_unwind_sp))
m_unwind_plan_arm_unwind_sp.reset();
@@ -166,9 +153,40 @@ UnwindPlanSP FuncUnwinders::GetArmUnwindUnwindPlan(Target &target,
return m_unwind_plan_arm_unwind_sp;
}
+namespace {
+class RegisterContextToInfo: public SymbolFile::RegisterInfoResolver {
+public:
+ RegisterContextToInfo(RegisterContext &ctx) : m_ctx(ctx) {}
+
+ const RegisterInfo *ResolveName(llvm::StringRef name) const {
+ return m_ctx.GetRegisterInfoByName(name);
+ }
+ const RegisterInfo *ResolveNumber(lldb::RegisterKind kind,
+ uint32_t number) const {
+ return m_ctx.GetRegisterInfo(kind, number);
+ }
+
+private:
+ RegisterContext &m_ctx;
+};
+} // namespace
+
+UnwindPlanSP FuncUnwinders::GetSymbolFileUnwindPlan(Thread &thread) {
+ std::lock_guard<std::recursive_mutex> guard(m_mutex);
+ if (m_unwind_plan_symbol_file_sp.get() || m_tried_unwind_plan_symbol_file)
+ return m_unwind_plan_symbol_file_sp;
+
+ m_tried_unwind_plan_symbol_file = true;
+ if (SymbolFile *symfile = m_unwind_table.GetSymbolFile()) {
+ m_unwind_plan_symbol_file_sp = symfile->GetUnwindPlan(
+ m_range.GetBaseAddress(),
+ RegisterContextToInfo(*thread.GetRegisterContext()));
+ }
+ return m_unwind_plan_symbol_file_sp;
+}
+
UnwindPlanSP FuncUnwinders::GetEHFrameAugmentedUnwindPlan(Target &target,
- Thread &thread,
- int current_offset) {
+ Thread &thread) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_eh_frame_augmented_sp.get() ||
m_tried_unwind_plan_eh_frame_augmented)
@@ -186,11 +204,12 @@ UnwindPlanSP FuncUnwinders::GetEHFrameAugmentedUnwindPlan(Target &target,
m_tried_unwind_plan_eh_frame_augmented = true;
- UnwindPlanSP eh_frame_plan = GetEHFrameUnwindPlan(target, current_offset);
+ UnwindPlanSP eh_frame_plan = GetEHFrameUnwindPlan(target);
if (!eh_frame_plan)
return m_unwind_plan_eh_frame_augmented_sp;
- m_unwind_plan_eh_frame_augmented_sp.reset(new UnwindPlan(*eh_frame_plan));
+ m_unwind_plan_eh_frame_augmented_sp =
+ std::make_shared<UnwindPlan>(*eh_frame_plan);
// Augment the eh_frame instructions with epilogue descriptions if necessary
// so the UnwindPlan can be used at any instruction in the function.
@@ -207,9 +226,8 @@ UnwindPlanSP FuncUnwinders::GetEHFrameAugmentedUnwindPlan(Target &target,
return m_unwind_plan_eh_frame_augmented_sp;
}
-UnwindPlanSP
-FuncUnwinders::GetDebugFrameAugmentedUnwindPlan(Target &target, Thread &thread,
- int current_offset) {
+UnwindPlanSP FuncUnwinders::GetDebugFrameAugmentedUnwindPlan(Target &target,
+ Thread &thread) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_debug_frame_augmented_sp.get() ||
m_tried_unwind_plan_debug_frame_augmented)
@@ -227,13 +245,12 @@ FuncUnwinders::GetDebugFrameAugmentedUnwindPlan(Target &target, Thread &thread,
m_tried_unwind_plan_debug_frame_augmented = true;
- UnwindPlanSP debug_frame_plan =
- GetDebugFrameUnwindPlan(target, current_offset);
+ UnwindPlanSP debug_frame_plan = GetDebugFrameUnwindPlan(target);
if (!debug_frame_plan)
return m_unwind_plan_debug_frame_augmented_sp;
- m_unwind_plan_debug_frame_augmented_sp.reset(
- new UnwindPlan(*debug_frame_plan));
+ m_unwind_plan_debug_frame_augmented_sp =
+ std::make_shared<UnwindPlan>(*debug_frame_plan);
// Augment the debug_frame instructions with epilogue descriptions if
// necessary so the UnwindPlan can be used at any instruction in the
@@ -251,8 +268,7 @@ FuncUnwinders::GetDebugFrameAugmentedUnwindPlan(Target &target, Thread &thread,
}
UnwindPlanSP FuncUnwinders::GetAssemblyUnwindPlan(Target &target,
- Thread &thread,
- int current_offset) {
+ Thread &thread) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_unwind_plan_assembly_sp.get() || m_tried_unwind_plan_assembly ||
!m_unwind_table.GetAllowAssemblyEmulationUnwindPlans()) {
@@ -263,7 +279,8 @@ UnwindPlanSP FuncUnwinders::GetAssemblyUnwindPlan(Target &target,
UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
if (assembly_profiler_sp) {
- m_unwind_plan_assembly_sp.reset(new UnwindPlan(lldb::eRegisterKindGeneric));
+ m_unwind_plan_assembly_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
if (!assembly_profiler_sp->GetNonCallSiteUnwindPlanFromAssembly(
m_range, thread, *m_unwind_plan_assembly_sp)) {
m_unwind_plan_assembly_sp.reset();
@@ -307,16 +324,14 @@ LazyBool FuncUnwinders::CompareUnwindPlansForIdenticalInitialPCLocation(
}
UnwindPlanSP FuncUnwinders::GetUnwindPlanAtNonCallSite(Target &target,
- Thread &thread,
- int current_offset) {
- UnwindPlanSP eh_frame_sp = GetEHFrameUnwindPlan(target, current_offset);
+ Thread &thread) {
+ UnwindPlanSP eh_frame_sp = GetEHFrameUnwindPlan(target);
if (!eh_frame_sp)
- eh_frame_sp = GetDebugFrameUnwindPlan(target, current_offset);
+ eh_frame_sp = GetDebugFrameUnwindPlan(target);
UnwindPlanSP arch_default_at_entry_sp =
GetUnwindPlanArchitectureDefaultAtFunctionEntry(thread);
UnwindPlanSP arch_default_sp = GetUnwindPlanArchitectureDefault(thread);
- UnwindPlanSP assembly_sp =
- GetAssemblyUnwindPlan(target, thread, current_offset);
+ UnwindPlanSP 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.
@@ -345,11 +360,11 @@ UnwindPlanSP FuncUnwinders::GetUnwindPlanAtNonCallSite(Target &target,
return eh_frame_sp;
}
- if (UnwindPlanSP plan_sp =
- GetEHFrameAugmentedUnwindPlan(target, thread, current_offset))
+ if (UnwindPlanSP plan_sp = GetSymbolFileUnwindPlan(thread))
+ return plan_sp;
+ if (UnwindPlanSP plan_sp = GetDebugFrameAugmentedUnwindPlan(target, thread))
return plan_sp;
- if (UnwindPlanSP plan_sp =
- GetDebugFrameAugmentedUnwindPlan(target, thread, current_offset))
+ if (UnwindPlanSP plan_sp = GetEHFrameAugmentedUnwindPlan(target, thread))
return plan_sp;
return assembly_sp;
@@ -365,7 +380,8 @@ UnwindPlanSP FuncUnwinders::GetUnwindPlanFastUnwind(Target &target,
UnwindAssemblySP assembly_profiler_sp(GetUnwindAssemblyProfiler(target));
if (assembly_profiler_sp) {
- m_unwind_plan_fast_sp.reset(new UnwindPlan(lldb::eRegisterKindGeneric));
+ m_unwind_plan_fast_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
if (!assembly_profiler_sp->GetFastUnwindPlan(m_range, thread,
*m_unwind_plan_fast_sp)) {
m_unwind_plan_fast_sp.reset();
@@ -386,8 +402,8 @@ UnwindPlanSP FuncUnwinders::GetUnwindPlanArchitectureDefault(Thread &thread) {
if (process_sp) {
ABI *abi = process_sp->GetABI().get();
if (abi) {
- m_unwind_plan_arch_default_sp.reset(
- new UnwindPlan(lldb::eRegisterKindGeneric));
+ m_unwind_plan_arch_default_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
if (!abi->CreateDefaultUnwindPlan(*m_unwind_plan_arch_default_sp)) {
m_unwind_plan_arch_default_sp.reset();
}
@@ -411,8 +427,8 @@ FuncUnwinders::GetUnwindPlanArchitectureDefaultAtFunctionEntry(Thread &thread) {
if (process_sp) {
ABI *abi = process_sp->GetABI().get();
if (abi) {
- m_unwind_plan_arch_default_at_func_entry_sp.reset(
- new UnwindPlan(lldb::eRegisterKindGeneric));
+ m_unwind_plan_arch_default_at_func_entry_sp =
+ std::make_shared<UnwindPlan>(lldb::eRegisterKindGeneric);
if (!abi->CreateFunctionEntryUnwindPlan(
*m_unwind_plan_arch_default_at_func_entry_sp)) {
m_unwind_plan_arch_default_at_func_entry_sp.reset();
@@ -453,9 +469,9 @@ FuncUnwinders::GetUnwindAssemblyProfiler(Target &target) {
Address FuncUnwinders::GetLSDAAddress(Target &target) {
Address lsda_addr;
- UnwindPlanSP unwind_plan_sp = GetEHFrameUnwindPlan(target, -1);
+ UnwindPlanSP unwind_plan_sp = GetEHFrameUnwindPlan(target);
if (unwind_plan_sp.get() == nullptr) {
- unwind_plan_sp = GetCompactUnwindUnwindPlan(target, -1);
+ unwind_plan_sp = GetCompactUnwindUnwindPlan(target);
}
if (unwind_plan_sp.get() && unwind_plan_sp->GetLSDAAddress().IsValid()) {
lsda_addr = unwind_plan_sp->GetLSDAAddress();
@@ -466,9 +482,9 @@ Address FuncUnwinders::GetLSDAAddress(Target &target) {
Address FuncUnwinders::GetPersonalityRoutinePtrAddress(Target &target) {
Address personality_addr;
- UnwindPlanSP unwind_plan_sp = GetEHFrameUnwindPlan(target, -1);
+ UnwindPlanSP unwind_plan_sp = GetEHFrameUnwindPlan(target);
if (unwind_plan_sp.get() == nullptr) {
- unwind_plan_sp = GetCompactUnwindUnwindPlan(target, -1);
+ unwind_plan_sp = GetCompactUnwindUnwindPlan(target);
}
if (unwind_plan_sp.get() &&
unwind_plan_sp->GetPersonalityFunctionPtr().IsValid()) {
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-18 11:31:34 +0000