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Walter Erquinigo cfd96f057b [trace][intel-pt] Implement the basic decoding functionality 
Depends on D89408.

This diff finally implements trace decoding!

The current interface is

  $ trace load /path/to/trace/session/file.json
  $ thread trace dump instructions

  thread #1: tid = 3842849, total instructions = 22
    [ 0] 0x40052d
    [ 1] 0x40052d
    ...
    [19] 0x400521

  $ # simply enter, which is a repeat command
    [20] 0x40052d
    [21] 0x400529
    ...

This doesn't do any disassembly, which will be done in the next diff.

Changes:
- Added an IntelPTDecoder class, that is a wrapper for libipt, which is the actual library that performs the decoding.
- Added TraceThreadDecoder class that decodes traces and memoizes the result to avoid repeating the decoding step.
- Added a DecodedThread class, which represents the output from decoding and that for the time being only stores the list of reconstructed instructions. Later it'll contain the function call hierarchy, which will enable reconstructing backtraces.
- Added basic APIs for accessing the trace in Trace.h:
  - GetInstructionCount, which counts the number of instructions traced for a given thread
  - IsTraceFailed, which returns an Error if decoding a thread failed
  - ForEachInstruction, which iterates on the instructions traced for a given thread, concealing the internal storage of threads, as plug-ins can decide to generate the instructions on the fly or to store them all in a vector, like I do.
- DumpTraceInstructions was updated to print the instructions or show an error message if decoding was impossible.
- Tests included

Differential Revision: https://reviews.llvm.org/D89283
 		2020-11-05 18:38:03 -08:00
..
ABI.cpp [lldb] Delete Value::Vector class 2020-11-04 10:21:56 +01:00
AssertFrameRecognizer.cpp [lldb] Store StackFrameRecognizers in the target instead of a global list 2020-07-17 09:26:27 +02:00
CMakeLists.txt [trace] rename ThreadIntelPT into TraceTrace 2020-10-19 15:15:02 -07:00
ExecutionContext.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
InstrumentationRuntime.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
InstrumentationRuntimeStopInfo.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
JITLoader.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
JITLoaderList.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
Language.cpp [lldb/DataFormatters] Delete GetStringPrinterEscapingHelper 2020-05-04 14:06:55 -07:00
LanguageRuntime.cpp [lldb] Delete copy operations on PluginInterface class 2020-10-09 10:37:09 +02:00
Memory.cpp [LLDB] Fix AddressSanitizer failure in MemoryCache 2020-02-27 11:17:10 -08:00
MemoryHistory.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
MemoryRegionInfo.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
ModuleCache.cpp [lldb] Use std::make_unique<> (NFC) 2020-06-24 17:48:40 -07:00
OperatingSystem.cpp [lldb] Delete copy operations on PluginInterface class 2020-10-09 10:37:09 +02:00
PathMappingList.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
Platform.cpp [lldb] GetSharedModule: Collect old modules in SmallVector 2020-10-30 15:14:31 -04:00
Process.cpp Fix raciness in the StopHook check for "has the target run". 2020-10-05 15:44:28 -07:00
ProcessTrace.cpp [trace][intel-pt] Implement the basic decoding functionality 2020-11-05 18:38:03 -08:00
Queue.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
QueueItem.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
QueueList.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
RegisterContext.cpp Remove code duplication from RegisterContextPOSIX_* 2020-06-18 01:02:46 +05:00
RegisterContextUnwind.cpp [lldb] NFC: Fix trivial typo in comments, documents, and messages 2020-04-07 01:06:16 +09:00
RegisterNumber.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
RemoteAwarePlatform.cpp [lldb/Target] Add custom interpreter option to `platform shell` 2020-09-02 16:36:10 +02:00
SectionLoadHistory.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
SectionLoadList.cpp [lldb] Switch Section-dumping code to raw_ostream 2020-05-14 11:59:18 +02:00
StackFrame.cpp [lldb] Fix a regression introduced by D75730 2020-10-22 08:38:03 -07:00
StackFrameList.cpp [lldb] Fix -Wmissing-field-initializers in StackFrameList 2020-06-09 11:58:08 +02:00
StackFrameRecognizer.cpp [lldb] Make deleting frame recognizers actually work 2020-07-23 17:43:37 +02:00
StackID.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
StopInfo.cpp [lldb] NFC: Fix trivial typo in comments, documents, and messages 2020-04-07 01:06:16 +09:00
StructuredDataPlugin.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
SystemRuntime.cpp [lldb] Have LanguageRuntime and SystemRuntime share a base class (NFC) 2020-07-24 16:28:34 -07:00
Target.cpp [lldb] GetSharedModule: Collect old modules in SmallVector 2020-10-30 15:14:31 -04:00
TargetList.cpp [TargetList] Delete the destructor 2020-11-05 16:56:37 -08:00
TargetProperties.td [lldb] Allow limiting the number of error diagnostics when parsing an expression 2020-10-13 17:12:43 +02:00
Thread.cpp [lldb][NFC] Fix warning in Thread::AutoCompleteThreadPlans 2020-08-11 10:26:01 +02:00
ThreadCollection.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
ThreadList.cpp Allow the ThreadPlanStackMap to hold the thread plans for threads 2020-04-03 14:56:28 -07:00
ThreadPlan.cpp Fix LLDB debug builds 2020-04-03 19:49:38 -07:00
ThreadPlanBase.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanCallFunction.cpp [lldb] Don't use static locals for return value storage in some *AsCString functions 2020-07-30 12:17:42 +02:00
ThreadPlanCallFunctionUsingABI.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanCallOnFunctionExit.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
ThreadPlanCallUserExpression.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanPython.cpp Add a setting to force stepping to always run all threads. 2020-08-07 14:47:31 -07:00
ThreadPlanRunToAddress.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanShouldStopHere.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
ThreadPlanStack.cpp [lldb] Fix -Wparentheses in ThreadPlanStack.cpp 2020-04-15 12:47:57 +02:00
ThreadPlanStepInRange.cpp [lldb] Use std::make_unique<> (NFC) 2020-06-24 17:48:40 -07:00
ThreadPlanStepInstruction.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanStepOut.cpp Allow the ThreadPlanStackMap to hold the thread plans for threads 2020-04-03 14:56:28 -07:00
ThreadPlanStepOverBreakpoint.cpp [lldb] Don't use static locals for return value storage in some *AsCString functions 2020-07-30 12:17:42 +02:00
ThreadPlanStepOverRange.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanStepRange.cpp Remove special Hexagon packet traversal code 2020-08-05 12:05:42 -05:00
ThreadPlanStepThrough.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanStepUntil.cpp Make ThreadPlans use TID and Process, rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadPlanTracer.cpp Make ThreadPlanTracers use TID & Process rather than Thread *. 2020-04-03 14:56:28 -07:00
ThreadSpec.cpp [lldb][NFC] Fix all formatting errors in .cpp file headers 2020-01-24 08:52:55 +01:00
ThreadTrace.cpp [trace] rename ThreadIntelPT into TraceTrace 2020-10-19 15:15:02 -07:00
Trace.cpp [trace][intel-pt] Implement the basic decoding functionality 2020-11-05 18:38:03 -08:00
TraceSessionFileParser.cpp [trace][intel-pt] Implement the basic decoding functionality 2020-11-05 18:38:03 -08:00
UnixSignals.cpp [lldb] Format remaining signal table (NFC) 2020-10-08 21:51:41 -07:00
UnwindAssembly.cpp [lldb] Delete copy operations on PluginInterface class 2020-10-09 10:37:09 +02:00
UnwindLLDB.cpp [lldb] Make UnwindLLDB a non-plugin 2020-03-10 13:56:15 +01:00