5cba569c4b
to modify the same UnwindTable object simultaneously. Fix HistoryThread and HistoryUnwind's mutex lock acqusition to retain the lock for the duration of the operation instead of releasing the temporary immediately. <rdar://problem/17055023> llvm-svn: 211241
84 lines
2.1 KiB
C++
84 lines
2.1 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/RegisterContextHistory.h"
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#include "Plugins/Process/Utility/HistoryUnwind.h"
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#include "lldb/Target/StackFrame.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.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,
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std::vector<lldb::addr_t> pcs,
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uint32_t stop_id,
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bool stop_id_is_valid) :
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Unwind (thread),
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m_pcs (pcs),
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m_stop_id (stop_id),
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m_stop_id_is_valid (stop_id_is_valid)
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{
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}
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// Destructor
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HistoryUnwind::~HistoryUnwind ()
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{
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}
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void
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HistoryUnwind::DoClear ()
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{
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Mutex::Locker locker(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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{
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RegisterContextSP rctx;
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if (frame)
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{
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addr_t pc = frame->GetFrameCodeAddress().GetLoadAddress (&frame->GetThread()->GetProcess()->GetTarget());
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if (pc != LLDB_INVALID_ADDRESS)
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{
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rctx.reset (new RegisterContextHistory (*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
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HistoryUnwind::DoGetFrameInfoAtIndex (uint32_t frame_idx, lldb::addr_t& cfa, lldb::addr_t& pc)
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{
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Mutex::Locker locker(m_unwind_mutex);
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if (frame_idx < m_pcs.size())
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{
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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
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HistoryUnwind::DoGetFrameCount ()
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{
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return m_pcs.size();
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}
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