fc5ef57c7d
:q! This diff is massive, but it's because it connects the client with lldb-server and also ensures that the postmortem case works. - Flatten the postmortem trace schema. The reason is that the schema has become quite complex due to the new multicore case, which defeats the original purpose of having a schema that could work for every trace plug-in. At this point, it's better that each trace plug-in defines it's own full schema. This means that the only common field is "type". -- Because of this new approach, I merged the "common" trace load and saving functionalities into the IntelPT one. This simplified the code quite a bit. If we eventually implement another trace plug-in, we can see then what we could reuse. -- The new schema, which is flattened, has now better comments and is parsed better. A change I did was to disallow hex addresses, because they are a bit error prone. I'm asking now to print the address in decimal. -- Renamed "intel" to "GenuineIntel" in the schema because that's what you see in /proc/cpuinfo. - Implemented reading the context switch trace data buffer. I had to do some refactors to do that cleanly. -- A major change that I did here was to simplify the perf_event circular buffer reading logic. It was too complex. Maybe the original Intel author had something different in mind. - Implemented all the necessary bits to read trace.json files with per-core data. - Implemented all the necessary bits to save to disk per-core trace session. - Added a test that ensures that parsing and saving to disk works. Differential Revision: https://reviews.llvm.org/D126015
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
//===-- ThreadPostMortemTrace.cpp -----------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ThreadPostMortemTrace.h"
|
|
|
|
#include <memory>
|
|
|
|
#include "Plugins/Process/Utility/RegisterContextHistory.h"
|
|
#include "lldb/Target/Process.h"
|
|
#include "lldb/Target/RegisterContext.h"
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
using namespace llvm;
|
|
|
|
void ThreadPostMortemTrace::RefreshStateAfterStop() {}
|
|
|
|
RegisterContextSP ThreadPostMortemTrace::GetRegisterContext() {
|
|
if (!m_reg_context_sp)
|
|
m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
|
|
|
|
return m_reg_context_sp;
|
|
}
|
|
|
|
RegisterContextSP
|
|
ThreadPostMortemTrace::CreateRegisterContextForFrame(StackFrame *frame) {
|
|
// Eventually this will calculate the register context based on the current
|
|
// trace position.
|
|
return std::make_shared<RegisterContextHistory>(
|
|
*this, 0, GetProcess()->GetAddressByteSize(), LLDB_INVALID_ADDRESS);
|
|
}
|
|
|
|
bool ThreadPostMortemTrace::CalculateStopInfo() { return false; }
|
|
|
|
const Optional<FileSpec> &ThreadPostMortemTrace::GetTraceFile() const {
|
|
return m_trace_file;
|
|
}
|