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
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
//===-- TraceIntelPTGDBRemotePackets.cpp ------------------------*- C++ -*-===//
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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 "lldb/Utility/TraceIntelPTGDBRemotePackets.h"
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using namespace llvm;
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using namespace llvm::json;
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namespace lldb_private {
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bool fromJSON(const json::Value &value, TraceIntelPTStartRequest &packet,
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Path path) {
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ObjectMapper o(value, path);
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if (!o || !fromJSON(value, (TraceStartRequest &)packet, path) ||
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!o.map("threadBufferSize", packet.threadBufferSize) ||
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!o.map("processBufferSizeLimit", packet.processBufferSizeLimit))
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return false;
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if (packet.tids && packet.processBufferSizeLimit) {
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path.report("processBufferSizeLimit must be provided");
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return false;
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}
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if (!packet.tids && !packet.processBufferSizeLimit) {
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path.report("processBufferSizeLimit must not be provided");
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return false;
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}
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return true;
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}
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json::Value toJSON(const TraceIntelPTStartRequest &packet) {
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json::Value base = toJSON((const TraceStartRequest &)packet);
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base.getAsObject()->try_emplace("threadBufferSize", packet.threadBufferSize);
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base.getAsObject()->try_emplace("processBufferSizeLimit",
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packet.processBufferSizeLimit);
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return base;
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}
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} // namespace lldb_private
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