forked from OSchip/llvm-project
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
//===-- HistoryUnwind.cpp ---------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/lldb-private.h"
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#include "Plugins/Process/Utility/HistoryUnwind.h"
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#include "Plugins/Process/Utility/RegisterContextHistory.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/StackFrame.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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using namespace lldb;
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using namespace lldb_private;
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// Constructor
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HistoryUnwind::HistoryUnwind(Thread &thread, std::vector<lldb::addr_t> pcs,
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bool stop_id_is_valid)
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: Unwind(thread), m_pcs(pcs), m_stop_id_is_valid(stop_id_is_valid) {}
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// Destructor
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HistoryUnwind::~HistoryUnwind() {}
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void HistoryUnwind::DoClear() {
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std::lock_guard<std::recursive_mutex> guard(m_unwind_mutex);
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m_pcs.clear();
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m_stop_id_is_valid = false;
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}
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lldb::RegisterContextSP
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HistoryUnwind::DoCreateRegisterContextForFrame(StackFrame *frame) {
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RegisterContextSP rctx;
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if (frame) {
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addr_t pc = frame->GetFrameCodeAddress().GetLoadAddress(
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&frame->GetThread()->GetProcess()->GetTarget());
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if (pc != LLDB_INVALID_ADDRESS) {
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rctx.reset(new RegisterContextHistory(
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*frame->GetThread().get(), frame->GetConcreteFrameIndex(),
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frame->GetThread()->GetProcess()->GetAddressByteSize(), pc));
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}
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}
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return rctx;
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}
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bool HistoryUnwind::DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa,
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lldb::addr_t &pc) {
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// FIXME do not throw away the lock after we acquire it..
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std::unique_lock<std::recursive_mutex> guard(m_unwind_mutex);
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guard.unlock();
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if (frame_idx < m_pcs.size()) {
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cfa = frame_idx;
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pc = m_pcs[frame_idx];
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return true;
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}
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return false;
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}
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uint32_t HistoryUnwind::DoGetFrameCount() { return m_pcs.size(); }
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