1 //===-- HistoryThread.cpp ---------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "lldb/lldb-private.h"
11 
12 #include "Plugins/Process/Utility/HistoryThread.h"
13 #include "Plugins/Process/Utility/HistoryUnwind.h"
14 #include "Plugins/Process/Utility/RegisterContextHistory.h"
15 
16 #include "lldb/Core/Log.h"
17 #include "lldb/Target/Process.h"
18 #include "lldb/Target/StackFrameList.h"
19 
20 using namespace lldb;
21 using namespace lldb_private;
22 
23 //  Constructor
24 
25 HistoryThread::HistoryThread(lldb_private::Process &process, lldb::tid_t tid,
26                              std::vector<lldb::addr_t> pcs, uint32_t stop_id,
27                              bool stop_id_is_valid)
28     : Thread(process, tid, true), m_framelist_mutex(), m_framelist(),
29       m_pcs(pcs), m_stop_id(stop_id), m_stop_id_is_valid(stop_id_is_valid),
30       m_extended_unwind_token(LLDB_INVALID_ADDRESS), m_queue_name(),
31       m_thread_name(), m_originating_unique_thread_id(tid),
32       m_queue_id(LLDB_INVALID_QUEUE_ID) {
33   m_unwinder_ap.reset(new HistoryUnwind(*this, pcs, stop_id_is_valid));
34   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
35   if (log)
36     log->Printf("%p HistoryThread::HistoryThread", static_cast<void *>(this));
37 }
38 
39 //  Destructor
40 
41 HistoryThread::~HistoryThread() {
42   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
43   if (log)
44     log->Printf("%p HistoryThread::~HistoryThread (tid=0x%" PRIx64 ")",
45                 static_cast<void *>(this), GetID());
46   DestroyThread();
47 }
48 
49 lldb::RegisterContextSP HistoryThread::GetRegisterContext() {
50   RegisterContextSP rctx;
51   if (m_pcs.size() > 0) {
52     rctx.reset(new RegisterContextHistory(
53         *this, 0, GetProcess()->GetAddressByteSize(), m_pcs[0]));
54   }
55   return rctx;
56 }
57 
58 lldb::RegisterContextSP
59 HistoryThread::CreateRegisterContextForFrame(StackFrame *frame) {
60   return m_unwinder_ap->CreateRegisterContextForFrame(frame);
61 }
62 
63 lldb::StackFrameListSP HistoryThread::GetStackFrameList() {
64   // FIXME do not throw away the lock after we acquire it..
65   std::unique_lock<std::mutex> lock(m_framelist_mutex);
66   lock.unlock();
67   if (m_framelist.get() == NULL) {
68     m_framelist.reset(new StackFrameList(*this, StackFrameListSP(), true));
69   }
70 
71   return m_framelist;
72 }
73 
74 uint32_t HistoryThread::GetExtendedBacktraceOriginatingIndexID() {
75   if (m_originating_unique_thread_id != LLDB_INVALID_THREAD_ID) {
76     if (GetProcess()->HasAssignedIndexIDToThread(
77             m_originating_unique_thread_id)) {
78       return GetProcess()->AssignIndexIDToThread(
79           m_originating_unique_thread_id);
80     }
81   }
82   return LLDB_INVALID_THREAD_ID;
83 }
84