0b69756110
This implements the interactive trace start and stop methods. This diff ended up being much larger than I anticipated because, by doing it, I found that I had implemented in the beginning many things in a non optimal way. In any case, the code is much better now. There's a lot of boilerplate code due to the gdb-remote protocol, but the main changes are: - New tracing packets: jLLDBTraceStop, jLLDBTraceStart, jLLDBTraceGetBinaryData. The gdb-remote packet definitions are quite comprehensive. - Implementation of the "process trace start|stop" and "thread trace start|stop" commands. - Implementaiton of an API in Trace.h to interact with live traces. - Created an IntelPTDecoder for live threads, that use the debugger's stop id as checkpoint for its internal cache. - Added a functionality to stop the process in case "process tracing" is enabled and a new thread can't traced. - Added tests I have some ideas to unify the code paths for post mortem and live threads, but I'll do that in another diff. Differential Revision: https://reviews.llvm.org/D91679
137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
//===-- SBTrace.cpp -------------------------------------------------------===//
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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 "SBReproducerPrivate.h"
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#include "lldb/Target/Process.h"
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#include "lldb/API/SBTrace.h"
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#include "lldb/API/SBTraceOptions.h"
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#include <memory>
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using namespace lldb;
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using namespace lldb_private;
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class TraceImpl {
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public:
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lldb::user_id_t uid;
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};
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lldb::ProcessSP SBTrace::GetSP() const { return m_opaque_wp.lock(); }
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size_t SBTrace::GetTraceData(SBError &error, void *buf, size_t size,
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size_t offset, lldb::tid_t thread_id) {
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LLDB_RECORD_DUMMY(size_t, SBTrace, GetTraceData,
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(lldb::SBError &, void *, size_t, size_t, lldb::tid_t),
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error, buf, size, offset, thread_id);
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ProcessSP process_sp(GetSP());
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llvm::MutableArrayRef<uint8_t> buffer(static_cast<uint8_t *>(buf), size);
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error.Clear();
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if (!process_sp) {
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error.SetErrorString("invalid process");
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} else {
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error.SetError(
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process_sp->GetData(GetTraceUID(), thread_id, buffer, offset));
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}
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return buffer.size();
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}
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size_t SBTrace::GetMetaData(SBError &error, void *buf, size_t size,
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size_t offset, lldb::tid_t thread_id) {
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LLDB_RECORD_DUMMY(size_t, SBTrace, GetMetaData,
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(lldb::SBError &, void *, size_t, size_t, lldb::tid_t),
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error, buf, size, offset, thread_id);
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ProcessSP process_sp(GetSP());
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llvm::MutableArrayRef<uint8_t> buffer(static_cast<uint8_t *>(buf), size);
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error.Clear();
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if (!process_sp) {
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error.SetErrorString("invalid process");
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} else {
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error.SetError(
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process_sp->GetMetaData(GetTraceUID(), thread_id, buffer, offset));
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}
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return buffer.size();
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}
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void SBTrace::StopTrace(SBError &error, lldb::tid_t thread_id) {
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LLDB_RECORD_METHOD(void, SBTrace, StopTrace, (lldb::SBError &, lldb::tid_t),
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error, thread_id);
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ProcessSP process_sp(GetSP());
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error.Clear();
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if (!process_sp) {
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error.SetErrorString("invalid process");
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return;
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}
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error.SetError(process_sp->StopTrace(GetTraceUID(), thread_id));
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}
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void SBTrace::GetTraceConfig(SBTraceOptions &options, SBError &error) {
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error.SetErrorString("deprecated");
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}
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lldb::user_id_t SBTrace::GetTraceUID() {
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LLDB_RECORD_METHOD_NO_ARGS(lldb::user_id_t, SBTrace, GetTraceUID);
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if (m_trace_impl_sp)
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return m_trace_impl_sp->uid;
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return LLDB_INVALID_UID;
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}
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void SBTrace::SetTraceUID(lldb::user_id_t uid) {
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if (m_trace_impl_sp)
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m_trace_impl_sp->uid = uid;
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}
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SBTrace::SBTrace() {
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LLDB_RECORD_CONSTRUCTOR_NO_ARGS(SBTrace);
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m_trace_impl_sp = std::make_shared<TraceImpl>();
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if (m_trace_impl_sp)
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m_trace_impl_sp->uid = LLDB_INVALID_UID;
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}
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void SBTrace::SetSP(const ProcessSP &process_sp) { m_opaque_wp = process_sp; }
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bool SBTrace::IsValid() {
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LLDB_RECORD_METHOD_NO_ARGS(bool, SBTrace, IsValid);
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return this->operator bool();
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}
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SBTrace::operator bool() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(bool, SBTrace, operator bool);
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if (!m_trace_impl_sp)
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return false;
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if (!GetSP())
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return false;
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return true;
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}
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namespace lldb_private {
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namespace repro {
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template <>
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void RegisterMethods<SBTrace>(Registry &R) {
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LLDB_REGISTER_METHOD(void, SBTrace, StopTrace,
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(lldb::SBError &, lldb::tid_t));
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LLDB_REGISTER_METHOD(void, SBTrace, GetTraceConfig,
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(lldb::SBTraceOptions &, lldb::SBError &));
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LLDB_REGISTER_METHOD(lldb::user_id_t, SBTrace, GetTraceUID, ());
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LLDB_REGISTER_CONSTRUCTOR(SBTrace, ());
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LLDB_REGISTER_METHOD(bool, SBTrace, IsValid, ());
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LLDB_REGISTER_METHOD_CONST(bool, SBTrace, operator bool, ());
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}
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}
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}
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