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
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
//===-- IntelPTThreadTraceCollection.h ------------------------ -*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef liblldb_IntelPTPerThreadTraceCollection_H_
|
|
#define liblldb_IntelPTPerThreadTraceCollection_H_
|
|
|
|
#include "IntelPTSingleBufferTrace.h"
|
|
|
|
namespace lldb_private {
|
|
namespace process_linux {
|
|
|
|
/// Manages a list of thread traces.
|
|
class IntelPTThreadTraceCollection {
|
|
public:
|
|
IntelPTThreadTraceCollection() {}
|
|
|
|
/// Dispose of all traces
|
|
void Clear();
|
|
|
|
/// \return
|
|
/// \b true if and only if this instance of tracing the provided \p tid.
|
|
bool TracesThread(lldb::tid_t tid) const;
|
|
|
|
/// \return
|
|
/// The total sum of the trace buffer sizes used by this collection.
|
|
size_t GetTotalBufferSize() const;
|
|
|
|
/// Execute the provided callback on each thread that is being traced.
|
|
///
|
|
/// \param[in] callback.tid
|
|
/// The id of the thread that is being traced.
|
|
///
|
|
/// \param[in] callback.core_trace
|
|
/// The single-buffer trace instance for the given core.
|
|
void ForEachThread(std::function<void(lldb::tid_t tid,
|
|
IntelPTSingleBufferTrace &thread_trace)>
|
|
callback);
|
|
|
|
llvm::Expected<IntelPTSingleBufferTrace &> GetTracedThread(lldb::tid_t tid);
|
|
|
|
/// Start tracing the thread given by its \p tid.
|
|
///
|
|
/// \return
|
|
/// An error if the operation failed.
|
|
llvm::Error TraceStart(lldb::tid_t tid,
|
|
const TraceIntelPTStartRequest &request);
|
|
|
|
/// Stop tracing the thread given by its \p tid.
|
|
///
|
|
/// \return
|
|
/// An error if the given thread is not being traced or tracing couldn't be
|
|
/// stopped.
|
|
llvm::Error TraceStop(lldb::tid_t tid);
|
|
|
|
size_t GetTracedThreadsCount() const;
|
|
|
|
/// \copydoc IntelPTProcessTrace::TryGetBinaryData()
|
|
llvm::Expected<llvm::Optional<std::vector<uint8_t>>>
|
|
TryGetBinaryData(const TraceGetBinaryDataRequest &request);
|
|
|
|
private:
|
|
llvm::DenseMap<lldb::tid_t, IntelPTSingleBufferTrace> m_thread_traces;
|
|
/// Total actual thread buffer size in bytes
|
|
size_t m_total_buffer_size = 0;
|
|
};
|
|
|
|
} // namespace process_linux
|
|
} // namespace lldb_private
|
|
|
|
#endif // liblldb_IntelPTPerThreadTraceCollection_H_
|