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/Log.h"
19
20 #include <memory>
21
22 using namespace lldb;
23 using namespace lldb_private;
24
25 // Constructor
26
HistoryThread(lldb_private::Process & process,lldb::tid_t tid,std::vector<lldb::addr_t> pcs,bool pcs_are_call_addresses)27 HistoryThread::HistoryThread(lldb_private::Process &process, lldb::tid_t tid,
28 std::vector<lldb::addr_t> pcs,
29 bool pcs_are_call_addresses)
30 : Thread(process, tid, true), m_framelist_mutex(), m_framelist(),
31 m_pcs(pcs), m_extended_unwind_token(LLDB_INVALID_ADDRESS), m_queue_name(),
32 m_thread_name(), m_originating_unique_thread_id(tid),
33 m_queue_id(LLDB_INVALID_QUEUE_ID) {
34 m_unwinder_up =
35 std::make_unique<HistoryUnwind>(*this, pcs, pcs_are_call_addresses);
36 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
37 LLDB_LOGF(log, "%p HistoryThread::HistoryThread", static_cast<void *>(this));
38 }
39
40 // Destructor
41
~HistoryThread()42 HistoryThread::~HistoryThread() {
43 Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
44 LLDB_LOGF(log, "%p HistoryThread::~HistoryThread (tid=0x%" PRIx64 ")",
45 static_cast<void *>(this), GetID());
46 DestroyThread();
47 }
48
GetRegisterContext()49 lldb::RegisterContextSP HistoryThread::GetRegisterContext() {
50 RegisterContextSP rctx;
51 if (m_pcs.size() > 0) {
52 rctx = std::make_shared<RegisterContextHistory>(
53 *this, 0, GetProcess()->GetAddressByteSize(), m_pcs[0]);
54 }
55 return rctx;
56 }
57
58 lldb::RegisterContextSP
CreateRegisterContextForFrame(StackFrame * frame)59 HistoryThread::CreateRegisterContextForFrame(StackFrame *frame) {
60 return m_unwinder_up->CreateRegisterContextForFrame(frame);
61 }
62
GetStackFrameList()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() == nullptr) {
68 m_framelist =
69 std::make_shared<StackFrameList>(*this, StackFrameListSP(), true);
70 }
71
72 return m_framelist;
73 }
74
GetExtendedBacktraceOriginatingIndexID()75 uint32_t HistoryThread::GetExtendedBacktraceOriginatingIndexID() {
76 if (m_originating_unique_thread_id != LLDB_INVALID_THREAD_ID) {
77 if (GetProcess()->HasAssignedIndexIDToThread(
78 m_originating_unique_thread_id)) {
79 return GetProcess()->AssignIndexIDToThread(
80 m_originating_unique_thread_id);
81 }
82 }
83 return LLDB_INVALID_THREAD_ID;
84 }
85