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Diffstat (limited to 'lldb/source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.cpp')
-rw-r--r--lldb/source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.cpp247
1 files changed, 0 insertions, 247 deletions
diff --git a/lldb/source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.cpp b/lldb/source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.cpp
deleted file mode 100644
index 558edeec1a37..000000000000
--- a/lldb/source/Plugins/Process/Utility/UnwindMacOSXFrameBackchain.cpp
+++ /dev/null
@@ -1,247 +0,0 @@
-//===-- UnwindMacOSXFrameBackchain.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
-//
-//===----------------------------------------------------------------------===//
-
-#include "lldb/Symbol/Function.h"
-#include "lldb/Symbol/ObjectFile.h"
-#include "lldb/Symbol/Symbol.h"
-#include "lldb/Target/ExecutionContext.h"
-#include "lldb/Target/Process.h"
-#include "lldb/Target/Target.h"
-#include "lldb/Target/Thread.h"
-#include "lldb/Utility/ArchSpec.h"
-
-#include "RegisterContextMacOSXFrameBackchain.h"
-
-#include <memory>
-
-using namespace lldb;
-using namespace lldb_private;
-
-UnwindMacOSXFrameBackchain::UnwindMacOSXFrameBackchain(Thread &thread)
- : Unwind(thread), m_cursors() {}
-
-uint32_t UnwindMacOSXFrameBackchain::DoGetFrameCount() {
- if (m_cursors.empty()) {
- ExecutionContext exe_ctx(m_thread.shared_from_this());
- Target *target = exe_ctx.GetTargetPtr();
- if (target) {
- const ArchSpec &target_arch = target->GetArchitecture();
- // Frame zero should always be supplied by the thread...
- exe_ctx.SetFrameSP(m_thread.GetStackFrameAtIndex(0));
-
- if (target_arch.GetAddressByteSize() == 8)
- GetStackFrameData_x86_64(exe_ctx);
- else
- GetStackFrameData_i386(exe_ctx);
- }
- }
- return m_cursors.size();
-}
-
-bool UnwindMacOSXFrameBackchain::DoGetFrameInfoAtIndex(
- uint32_t idx, addr_t &cfa, addr_t &pc, bool &behaves_like_zeroth_frame) {
- const uint32_t frame_count = GetFrameCount();
- if (idx < frame_count) {
- if (m_cursors[idx].pc == LLDB_INVALID_ADDRESS)
- return false;
- if (m_cursors[idx].fp == LLDB_INVALID_ADDRESS)
- return false;
-
- pc = m_cursors[idx].pc;
- cfa = m_cursors[idx].fp;
- behaves_like_zeroth_frame = (idx == 0);
-
- return true;
- }
- return false;
-}
-
-lldb::RegisterContextSP
-UnwindMacOSXFrameBackchain::DoCreateRegisterContextForFrame(StackFrame *frame) {
- lldb::RegisterContextSP reg_ctx_sp;
- uint32_t concrete_idx = frame->GetConcreteFrameIndex();
- const uint32_t frame_count = GetFrameCount();
- if (concrete_idx < frame_count)
- reg_ctx_sp = std::make_shared<RegisterContextMacOSXFrameBackchain>(
- m_thread, concrete_idx, m_cursors[concrete_idx]);
- return reg_ctx_sp;
-}
-
-size_t UnwindMacOSXFrameBackchain::GetStackFrameData_i386(
- const ExecutionContext &exe_ctx) {
- m_cursors.clear();
-
- StackFrame *first_frame = exe_ctx.GetFramePtr();
-
- Process *process = exe_ctx.GetProcessPtr();
- if (process == nullptr)
- return 0;
-
- struct Frame_i386 {
- uint32_t fp;
- uint32_t pc;
- };
-
- RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();
- assert(reg_ctx);
-
- Cursor cursor;
- cursor.pc = reg_ctx->GetPC(LLDB_INVALID_ADDRESS);
- cursor.fp = reg_ctx->GetFP(0);
-
- Frame_i386 frame = {static_cast<uint32_t>(cursor.fp),
- static_cast<uint32_t>(cursor.pc)};
-
- m_cursors.push_back(cursor);
-
- const size_t k_frame_size = sizeof(frame);
- Status error;
- while (frame.fp != 0 && frame.pc != 0 && ((frame.fp & 7) == 0)) {
- // Read both the FP and PC (8 bytes)
- if (process->ReadMemory(frame.fp, &frame.fp, k_frame_size, error) !=
- k_frame_size)
- break;
- if (frame.pc >= 0x1000) {
- cursor.pc = frame.pc;
- cursor.fp = frame.fp;
- m_cursors.push_back(cursor);
- }
- }
- if (!m_cursors.empty()) {
- lldb::addr_t first_frame_pc = m_cursors.front().pc;
- if (first_frame_pc != LLDB_INVALID_ADDRESS) {
- const SymbolContextItem resolve_scope =
- eSymbolContextModule | eSymbolContextCompUnit |
- eSymbolContextFunction | eSymbolContextSymbol;
-
- SymbolContext first_frame_sc(
- first_frame->GetSymbolContext(resolve_scope));
- const AddressRange *addr_range_ptr = nullptr;
- AddressRange range;
- if (first_frame_sc.function)
- addr_range_ptr = &first_frame_sc.function->GetAddressRange();
- else if (first_frame_sc.symbol) {
- range.GetBaseAddress() = first_frame_sc.symbol->GetAddress();
- range.SetByteSize(first_frame_sc.symbol->GetByteSize());
- addr_range_ptr = &range;
- }
-
- if (addr_range_ptr) {
- if (first_frame->GetFrameCodeAddress() ==
- addr_range_ptr->GetBaseAddress()) {
- // We are at the first instruction, so we can recover the previous PC
- // by dereferencing the SP
- lldb::addr_t first_frame_sp = reg_ctx->GetSP(0);
- // Read the real second frame return address into frame.pc
- if (first_frame_sp &&
- process->ReadMemory(first_frame_sp, &frame.pc, sizeof(frame.pc),
- error) == sizeof(frame.pc)) {
- cursor.fp = m_cursors.front().fp;
- cursor.pc = frame.pc; // Set the new second frame PC
-
- // Insert the second frame
- m_cursors.insert(m_cursors.begin() + 1, cursor);
-
- m_cursors.front().fp = first_frame_sp;
- }
- }
- }
- }
- }
- // uint32_t i=0;
- // printf(" PC FP\n");
- // printf(" ------------------ ------------------ \n");
- // for (i=0; i<m_cursors.size(); ++i)
- // {
- // printf("[%3u] 0x%16.16" PRIx64 " 0x%16.16" PRIx64 "\n", i,
- // m_cursors[i].pc, m_cursors[i].fp);
- // }
- return m_cursors.size();
-}
-
-size_t UnwindMacOSXFrameBackchain::GetStackFrameData_x86_64(
- const ExecutionContext &exe_ctx) {
- m_cursors.clear();
-
- Process *process = exe_ctx.GetProcessPtr();
- if (process == nullptr)
- return 0;
-
- StackFrame *first_frame = exe_ctx.GetFramePtr();
-
- struct Frame_x86_64 {
- uint64_t fp;
- uint64_t pc;
- };
-
- RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();
- assert(reg_ctx);
-
- Cursor cursor;
- cursor.pc = reg_ctx->GetPC(LLDB_INVALID_ADDRESS);
- cursor.fp = reg_ctx->GetFP(0);
-
- Frame_x86_64 frame = {cursor.fp, cursor.pc};
-
- m_cursors.push_back(cursor);
- Status error;
- const size_t k_frame_size = sizeof(frame);
- while (frame.fp != 0 && frame.pc != 0 && ((frame.fp & 7) == 0)) {
- // Read both the FP and PC (16 bytes)
- if (process->ReadMemory(frame.fp, &frame.fp, k_frame_size, error) !=
- k_frame_size)
- break;
-
- if (frame.pc >= 0x1000) {
- cursor.pc = frame.pc;
- cursor.fp = frame.fp;
- m_cursors.push_back(cursor);
- }
- }
- if (!m_cursors.empty()) {
- lldb::addr_t first_frame_pc = m_cursors.front().pc;
- if (first_frame_pc != LLDB_INVALID_ADDRESS) {
- const SymbolContextItem resolve_scope =
- eSymbolContextModule | eSymbolContextCompUnit |
- eSymbolContextFunction | eSymbolContextSymbol;
-
- SymbolContext first_frame_sc(
- first_frame->GetSymbolContext(resolve_scope));
- const AddressRange *addr_range_ptr = nullptr;
- AddressRange range;
- if (first_frame_sc.function)
- addr_range_ptr = &first_frame_sc.function->GetAddressRange();
- else if (first_frame_sc.symbol) {
- range.GetBaseAddress() = first_frame_sc.symbol->GetAddress();
- range.SetByteSize(first_frame_sc.symbol->GetByteSize());
- addr_range_ptr = &range;
- }
-
- if (addr_range_ptr) {
- if (first_frame->GetFrameCodeAddress() ==
- addr_range_ptr->GetBaseAddress()) {
- // We are at the first instruction, so we can recover the previous PC
- // by dereferencing the SP
- lldb::addr_t first_frame_sp = reg_ctx->GetSP(0);
- // Read the real second frame return address into frame.pc
- if (process->ReadMemory(first_frame_sp, &frame.pc, sizeof(frame.pc),
- error) == sizeof(frame.pc)) {
- cursor.fp = m_cursors.front().fp;
- cursor.pc = frame.pc; // Set the new second frame PC
-
- // Insert the second frame
- m_cursors.insert(m_cursors.begin() + 1, cursor);
-
- m_cursors.front().fp = first_frame_sp;
- }
- }
- }
- }
- }
- return m_cursors.size();
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-10 14:42:11 +0000