1 //===-- HistoryThread.cpp -------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "lldb/lldb-private.h"
10
11 #include "Plugins/Process/Utility/HistoryThread.h"
12
13 #include "Plugins/Process/Utility/HistoryUnwind.h"
14 #include "Plugins/Process/Utility/RegisterContextHistory.h"
15
16 #include "lldb/Target/Process.h"
17 #include "lldb/Target/StackFrameList.h"
18 #include "lldb/Utility/LLDBLog.h"
19 #include "lldb/Utility/Log.h"
20
21 #include <memory>
22
23 using namespace lldb;
24 using namespace lldb_private;
25
26 // Constructor
27
HistoryThread(lldb_private::Process & process,lldb::tid_t tid,std::vector<lldb::addr_t> pcs,bool pcs_are_call_addresses)28 HistoryThread::HistoryThread(lldb_private::Process &process, lldb::tid_t tid,
29 std::vector<lldb::addr_t> pcs,
30 bool pcs_are_call_addresses)
31 : Thread(process, tid, true), m_framelist_mutex(), m_framelist(),
32 m_pcs(pcs), m_extended_unwind_token(LLDB_INVALID_ADDRESS), m_queue_name(),
33 m_thread_name(), m_originating_unique_thread_id(tid),
34 m_queue_id(LLDB_INVALID_QUEUE_ID) {
35 m_unwinder_up =
36 std::make_unique<HistoryUnwind>(*this, pcs, pcs_are_call_addresses);
37 Log *log = GetLog(LLDBLog::Object);
38 LLDB_LOGF(log, "%p HistoryThread::HistoryThread", static_cast<void *>(this));
39 }
40
41 // Destructor
42
~HistoryThread()43 HistoryThread::~HistoryThread() {
44 Log *log = GetLog(LLDBLog::Object);
45 LLDB_LOGF(log, "%p HistoryThread::~HistoryThread (tid=0x%" PRIx64 ")",
46 static_cast<void *>(this), GetID());
47 DestroyThread();
48 }
49
GetRegisterContext()50 lldb::RegisterContextSP HistoryThread::GetRegisterContext() {
51 RegisterContextSP rctx;
52 if (m_pcs.size() > 0) {
53 rctx = std::make_shared<RegisterContextHistory>(
54 *this, 0, GetProcess()->GetAddressByteSize(), m_pcs[0]);
55 }
56 return rctx;
57 }
58
59 lldb::RegisterContextSP
CreateRegisterContextForFrame(StackFrame * frame)60 HistoryThread::CreateRegisterContextForFrame(StackFrame *frame) {
61 return m_unwinder_up->CreateRegisterContextForFrame(frame);
62 }
63
GetStackFrameList()64 lldb::StackFrameListSP HistoryThread::GetStackFrameList() {
65 // FIXME do not throw away the lock after we acquire it..
66 std::unique_lock<std::mutex> lock(m_framelist_mutex);
67 lock.unlock();
68 if (m_framelist.get() == nullptr) {
69 m_framelist =
70 std::make_shared<StackFrameList>(*this, StackFrameListSP(), true);
71 }
72
73 return m_framelist;
74 }
75
GetExtendedBacktraceOriginatingIndexID()76 uint32_t HistoryThread::GetExtendedBacktraceOriginatingIndexID() {
77 if (m_originating_unique_thread_id != LLDB_INVALID_THREAD_ID) {
78 if (GetProcess()->HasAssignedIndexIDToThread(
79 m_originating_unique_thread_id)) {
80 return GetProcess()->AssignIndexIDToThread(
81 m_originating_unique_thread_id);
82 }
83 }
84 return LLDB_INVALID_THREAD_ID;
85 }
86