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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//===-- HistoryUnwind.cpp ---------------------------------------*- C++ -*-===//
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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/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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