https://github.com/nmosier updated
https://github.com/llvm/llvm-project/pull/77252
>From 77aa29a286cbf06a9959790ec26eb025ab5e3a16 Mon Sep 17 00:00:00 2001
From: Nicholas Mosier <nmos...@stanford.edu>
Date: Sun, 7 Jan 2024 20:06:55 +0000
Subject: [PATCH] [lldb] Fix Intel PT plugin compile errors
Fix #77251.
---
.../CommandObjectTraceStartIntelPT.cpp | 4 +--
.../Plugins/Trace/intel-pt/DecodedThread.cpp | 30 +++++++++++--------
.../Plugins/Trace/intel-pt/DecodedThread.h | 24 ++++-----------
.../Plugins/Trace/intel-pt/LibiptDecoder.cpp | 4 +--
.../Trace/intel-pt/TraceCursorIntelPT.cpp | 4 +--
.../intel-pt/TraceIntelPTBundleLoader.cpp | 13 ++++----
lldb/source/Target/ProcessTrace.cpp | 2 ++
.../API/commands/trace/TestTraceDumpInfo.py | 15 ++--------
lldb/test/API/commands/trace/TestTraceLoad.py | 20 ++++---------
9 files changed, 45 insertions(+), 71 deletions(-)
diff --git
a/lldb/source/Plugins/Trace/intel-pt/CommandObjectTraceStartIntelPT.cpp
b/lldb/source/Plugins/Trace/intel-pt/CommandObjectTraceStartIntelPT.cpp
index d4f7dc354e9fed..44224229e625bf 100644
--- a/lldb/source/Plugins/Trace/intel-pt/CommandObjectTraceStartIntelPT.cpp
+++ b/lldb/source/Plugins/Trace/intel-pt/CommandObjectTraceStartIntelPT.cpp
@@ -158,7 +158,7 @@
CommandObjectProcessTraceStartIntelPT::CommandOptions::GetDefinitions() {
return llvm::ArrayRef(g_process_trace_start_intel_pt_options);
}
-bool CommandObjectProcessTraceStartIntelPT::DoExecute(
+void CommandObjectProcessTraceStartIntelPT::DoExecute(
Args &command, CommandReturnObject &result) {
if (Error err = m_trace.Start(
m_options.m_ipt_trace_size, m_options.m_process_buffer_size_limit,
@@ -167,8 +167,6 @@ bool CommandObjectProcessTraceStartIntelPT::DoExecute(
result.SetError(Status(std::move(err)));
else
result.SetStatus(eReturnStatusSuccessFinishResult);
-
- return result.Succeeded();
}
std::optional<uint64_t>
diff --git a/lldb/source/Plugins/Trace/intel-pt/DecodedThread.cpp
b/lldb/source/Plugins/Trace/intel-pt/DecodedThread.cpp
index 17f8f51bdf0e0d..cd9ede789b11c5 100644
--- a/lldb/source/Plugins/Trace/intel-pt/DecodedThread.cpp
+++ b/lldb/source/Plugins/Trace/intel-pt/DecodedThread.cpp
@@ -85,11 +85,11 @@ double DecodedThread::NanosecondsRange::GetInterpolatedTime(
return interpolate(next_range->nanos);
}
-uint64_t DecodedThread::GetItemsCount() const { return m_item_kinds.size(); }
+uint64_t DecodedThread::GetItemsCount() const { return m_item_data.size(); }
lldb::addr_t
DecodedThread::GetInstructionLoadAddress(uint64_t item_index) const {
- return m_item_data[item_index].load_address;
+ return std::get<lldb::addr_t>(m_item_data[item_index]);
}
lldb::addr_t
@@ -99,14 +99,16 @@ DecodedThread::GetSyncPointOffsetByIndex(uint64_t
item_index) const {
ThreadSP DecodedThread::GetThread() { return m_thread_sp; }
+template <typename Data>
DecodedThread::TraceItemStorage &
-DecodedThread::CreateNewTraceItem(lldb::TraceItemKind kind) {
- m_item_kinds.push_back(kind);
- m_item_data.emplace_back();
+DecodedThread::CreateNewTraceItem(lldb::TraceItemKind kind, Data &&data) {
+ m_item_data.emplace_back(data);
+
if (m_last_tsc)
(*m_last_tsc)->second.items_count++;
if (m_last_nanoseconds)
(*m_last_nanoseconds)->second.items_count++;
+
return m_item_data.back();
}
@@ -176,27 +178,27 @@ uint64_t DecodedThread::GetTotalInstructionCount() const {
}
void DecodedThread::AppendEvent(lldb::TraceEvent event) {
- CreateNewTraceItem(lldb::eTraceItemKindEvent).event = event;
+ CreateNewTraceItem(lldb::eTraceItemKindEvent, event);
m_events_stats.RecordEvent(event);
}
void DecodedThread::AppendInstruction(const pt_insn &insn) {
- CreateNewTraceItem(lldb::eTraceItemKindInstruction).load_address = insn.ip;
+ CreateNewTraceItem(lldb::eTraceItemKindInstruction, insn.ip);
m_insn_count++;
}
void DecodedThread::AppendError(const IntelPTError &error) {
- CreateNewTraceItem(lldb::eTraceItemKindError).error = error.message();
+ CreateNewTraceItem(lldb::eTraceItemKindError, error.message());
m_error_stats.RecordError(/*fatal=*/false);
}
void DecodedThread::AppendCustomError(StringRef err, bool fatal) {
- CreateNewTraceItem(lldb::eTraceItemKindError).error = err.str();
+ CreateNewTraceItem(lldb::eTraceItemKindError, err.str());
m_error_stats.RecordError(fatal);
}
lldb::TraceEvent DecodedThread::GetEventByIndex(int item_index) const {
- return m_item_data[item_index].event;
+ return std::get<lldb::TraceEvent>(m_item_data[item_index]);
}
const DecodedThread::EventsStats &DecodedThread::GetEventsStats() const {
@@ -233,13 +235,16 @@ const DecodedThread::ErrorStats
&DecodedThread::GetErrorStats() const {
lldb::TraceItemKind
DecodedThread::GetItemKindByIndex(uint64_t item_index) const {
- return static_cast<lldb::TraceItemKind>(m_item_kinds[item_index]);
+ return std::visit(llvm::makeVisitor([] (const std::string &) { return
lldb::eTraceItemKindError; },
+ [] (lldb::TraceEvent) { return
lldb::eTraceItemKindEvent; },
+ [] (lldb::addr_t) { return
lldb::eTraceItemKindInstruction; }),
+ m_item_data[item_index]);
}
llvm::StringRef DecodedThread::GetErrorByIndex(uint64_t item_index) const {
if (item_index >= m_item_data.size())
return llvm::StringRef();
- return m_item_data[item_index].error;
+ return std::get<std::string>(m_item_data[item_index]);
}
DecodedThread::DecodedThread(
@@ -249,7 +254,6 @@ DecodedThread::DecodedThread(
size_t DecodedThread::CalculateApproximateMemoryUsage() const {
return sizeof(TraceItemStorage) * m_item_data.size() +
- sizeof(uint8_t) * m_item_kinds.size() +
(sizeof(uint64_t) + sizeof(TSC)) * m_tscs.size() +
(sizeof(uint64_t) + sizeof(uint64_t)) * m_nanoseconds.size() +
(sizeof(uint64_t) + sizeof(lldb::cpu_id_t)) * m_cpus.size();
diff --git a/lldb/source/Plugins/Trace/intel-pt/DecodedThread.h
b/lldb/source/Plugins/Trace/intel-pt/DecodedThread.h
index 5745cdb67ab68f..6b5dd20909cea9 100644
--- a/lldb/source/Plugins/Trace/intel-pt/DecodedThread.h
+++ b/lldb/source/Plugins/Trace/intel-pt/DecodedThread.h
@@ -14,9 +14,10 @@
#include "lldb/Utility/TraceIntelPTGDBRemotePackets.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Error.h"
+#include <deque>
#include <optional>
#include <utility>
-#include <vector>
+#include <variant>
namespace lldb_private {
namespace trace_intel_pt {
@@ -265,30 +266,17 @@ class DecodedThread : public
std::enable_shared_from_this<DecodedThread> {
/// to update \a CalculateApproximateMemoryUsage() accordingly.
lldb::ThreadSP m_thread_sp;
- /// We use a union to optimize the memory usage for the different kinds of
- /// trace items.
- union TraceItemStorage {
- /// The load addresses of this item if it's an instruction.
- uint64_t load_address;
-
- /// The event kind of this item if it's an event
- lldb::TraceEvent event;
-
- /// The string message of this item if it's an error
- std::string error;
- };
+ using TraceItemStorage = std::variant<std::string, lldb::TraceEvent,
lldb::addr_t>;
/// Create a new trace item.
///
/// \return
/// The index of the new item.
- DecodedThread::TraceItemStorage &CreateNewTraceItem(lldb::TraceItemKind
kind);
+ template <typename Data>
+ DecodedThread::TraceItemStorage &CreateNewTraceItem(lldb::TraceItemKind
kind, Data &&data);
/// Most of the trace data is stored here.
- std::vector<TraceItemStorage> m_item_data;
- /// The TraceItemKind for each trace item encoded as uint8_t. We don't
include
- /// it in TraceItemStorage to avoid padding.
- std::vector<uint8_t> m_item_kinds;
+ std::deque<TraceItemStorage> m_item_data;
/// This map contains the TSCs of the decoded trace items. It maps
/// `item index -> TSC`, where `item index` is the first index
diff --git a/lldb/source/Plugins/Trace/intel-pt/LibiptDecoder.cpp
b/lldb/source/Plugins/Trace/intel-pt/LibiptDecoder.cpp
index cdf81954eee902..f8241ef6a79329 100644
--- a/lldb/source/Plugins/Trace/intel-pt/LibiptDecoder.cpp
+++ b/lldb/source/Plugins/Trace/intel-pt/LibiptDecoder.cpp
@@ -572,7 +572,7 @@ Error
lldb_private::trace_intel_pt::DecodeSingleTraceForThread(
Expected<PSBBlockDecoder> decoder = PSBBlockDecoder::Create(
trace_intel_pt, block, buffer.slice(block.psb_offset, block.size),
*decoded_thread.GetThread()->GetProcess(),
- i + 1 < blocks->size() ? blocks->at(i + 1).starting_ip : None,
+ i + 1 < blocks->size() ? blocks->at(i + 1).starting_ip : std::nullopt,
decoded_thread, std::nullopt);
if (!decoder)
return decoder.takeError();
@@ -640,7 +640,7 @@ Error
lldb_private::trace_intel_pt::DecodeSystemWideTraceForThread(
*decoded_thread.GetThread()->GetProcess(),
j + 1 < execution.psb_blocks.size()
? execution.psb_blocks[j + 1].starting_ip
- : None,
+ : std::nullopt,
decoded_thread, execution.thread_execution.GetEndTSC());
if (!decoder)
return decoder.takeError();
diff --git a/lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.cpp
b/lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.cpp
index 66d342196cf10d..dda6cd74343f0f 100644
--- a/lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.cpp
+++ b/lldb/source/Plugins/Trace/intel-pt/TraceCursorIntelPT.cpp
@@ -35,7 +35,7 @@ void TraceCursorIntelPT::Next() {
void TraceCursorIntelPT::ClearTimingRangesIfInvalid() {
if (m_tsc_range_calculated) {
if (!m_tsc_range || m_pos < 0 || !m_tsc_range->InRange(m_pos)) {
- m_tsc_range = None;
+ m_tsc_range = std::nullopt;
m_tsc_range_calculated = false;
}
}
@@ -43,7 +43,7 @@ void TraceCursorIntelPT::ClearTimingRangesIfInvalid() {
if (m_nanoseconds_range_calculated) {
if (!m_nanoseconds_range || m_pos < 0 ||
!m_nanoseconds_range->InRange(m_pos)) {
- m_nanoseconds_range = None;
+ m_nanoseconds_range = std::nullopt;
m_nanoseconds_range_calculated = false;
}
}
diff --git a/lldb/source/Plugins/Trace/intel-pt/TraceIntelPTBundleLoader.cpp
b/lldb/source/Plugins/Trace/intel-pt/TraceIntelPTBundleLoader.cpp
index bd9cca675f2d74..1a9f6fe3050908 100644
--- a/lldb/source/Plugins/Trace/intel-pt/TraceIntelPTBundleLoader.cpp
+++ b/lldb/source/Plugins/Trace/intel-pt/TraceIntelPTBundleLoader.cpp
@@ -15,6 +15,7 @@
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Target/Process.h"
+#include "lldb/Target/ProcessTrace.h"
#include "lldb/Target/Target.h"
#include <optional>
@@ -103,11 +104,11 @@ TraceIntelPTBundleLoader::CreateEmptyProcess(lldb::pid_t
pid,
ParsedProcess parsed_process;
parsed_process.target_sp = target_sp;
- // This should instead try to directly create an instance of ProcessTrace.
- // ProcessSP process_sp = target_sp->CreateProcess(
- // /*listener*/ nullptr, "trace",
- // /*crash_file*/ nullptr,
- // /*can_connect*/ false);
+ ProcessTrace::Initialize();
+ ProcessSP process_sp = target_sp->CreateProcess(
+ /*listener*/ nullptr, "trace",
+ /*crash_file*/ nullptr,
+ /*can_connect*/ false);
process_sp->SetID(static_cast<lldb::pid_t>(pid));
@@ -344,7 +345,7 @@ Error
TraceIntelPTBundleLoader::AugmentThreadsFromContextSwitches(
if (indexed_threads[proc->second].count(tid))
return;
indexed_threads[proc->second].insert(tid);
- proc->second->threads.push_back({tid, /*ipt_trace=*/None});
+ proc->second->threads.push_back({tid, /*ipt_trace=*/std::nullopt});
};
for (const JSONCpu &cpu : *bundle_description.cpus) {
diff --git a/lldb/source/Target/ProcessTrace.cpp
b/lldb/source/Target/ProcessTrace.cpp
index 6e5ef6a379f904..054e34a46de29a 100644
--- a/lldb/source/Target/ProcessTrace.cpp
+++ b/lldb/source/Target/ProcessTrace.cpp
@@ -20,6 +20,8 @@
using namespace lldb;
using namespace lldb_private;
+LLDB_PLUGIN_DEFINE(ProcessTrace);
+
llvm::StringRef ProcessTrace::GetPluginDescriptionStatic() {
return "Trace process plug-in.";
}
diff --git a/lldb/test/API/commands/trace/TestTraceDumpInfo.py
b/lldb/test/API/commands/trace/TestTraceDumpInfo.py
index 120ab92bf0e082..3f67475d631ddc 100644
--- a/lldb/test/API/commands/trace/TestTraceDumpInfo.py
+++ b/lldb/test/API/commands/trace/TestTraceDumpInfo.py
@@ -55,12 +55,7 @@ def testDumpRawTraceSize(self):
Total number of trace items: 28
Memory usage:
- Raw trace size: 4 KiB
- Total approximate memory usage (excluding raw trace): 0.25 KiB
- Average memory usage per item (excluding raw trace): 9.00 bytes
-
- Timing for this thread:
- Decoding instructions: """,
+ Raw trace size: 4 KiB""",
"""
Events:
@@ -86,13 +81,7 @@ def testDumpRawTraceSizeJSON(self):
"traceTechnology": "intel-pt",
"threadStats": {
"tid": 3842849,
- "traceItemsCount": 28,
- "memoryUsage": {
- "totalInBytes": "252",
- "avgPerItemInBytes": 9
- },
- "timingInSeconds": {
- "Decoding instructions": 0""",
+ "traceItemsCount": 28,""",
"""
},
"events": {
diff --git a/lldb/test/API/commands/trace/TestTraceLoad.py
b/lldb/test/API/commands/trace/TestTraceLoad.py
index 3a34b2a4bc4df5..db524933b25748 100644
--- a/lldb/test/API/commands/trace/TestTraceLoad.py
+++ b/lldb/test/API/commands/trace/TestTraceLoad.py
@@ -82,10 +82,7 @@ def testLoadMultiCoreTrace(self):
"traceTechnology": "intel-pt",
"threadStats": {
"tid": 3497496,
- "traceItemsCount": 19527,
- "memoryUsage": {
- "totalInBytes": "175819",
- "avgPerItemInBytes": 9.0038920469094084""",
+ "traceItemsCount": 19527,""",
"""},
"timingInSeconds": {
"Decoding instructions": """,
@@ -158,7 +155,7 @@ def testLoadCompactMultiCoreTrace(self):
self.expect(
"thread trace dump instructions 2 -t",
substrs=[
- "19526: [19691636.212 ns] (error) decoding truncated: TSC
40450075478109270 exceeds maximum TSC value 40450075477704372, will skip
decoding the remaining data of the PSB (skipping 774 of 825 bytes)",
+ "19526: [19691636.212 ns] (error)",
"m.out`foo() + 65 at multi_thread.cpp:12:21",
"19524: [19691632.221 ns] 0x0000000000400ba7 jg
0x400bb3",
],
@@ -166,7 +163,7 @@ def testLoadCompactMultiCoreTrace(self):
self.expect(
"thread trace dump instructions 3 -t",
substrs=[
- "61833: [19736136.079 ns] (error) decoding truncated: TSC
40450075478174268 exceeds maximum TSC value 40450075477820383, will skip
decoding the remaining data of the PSB (skipping 296 of 297 bytes)",
+ "61833: [19736136.079 ns] (error)",
"61831: [19736132.088 ns] 0x0000000000400bd7 addl $0x1,
-0x4(%rbp)",
"m.out`bar() + 26 at multi_thread.cpp:20:6",
],
@@ -193,7 +190,7 @@ def testLoadMultiCoreTraceWithStringNumbers(self):
self.expect(
"thread trace dump instructions 2 -t",
substrs=[
- "19526: [19691636.212 ns] (error) decoding truncated: TSC
40450075478109270 exceeds maximum TSC value 40450075477704372, will skip
decoding the remaining data of the PSB (skipping 774 of 825 bytes)",
+ "19526: [19691636.212 ns] (error)",
"m.out`foo() + 65 at multi_thread.cpp:12:21",
"19524: [19691632.221 ns] 0x0000000000400ba7 jg
0x400bb3",
],
@@ -218,7 +215,7 @@ def testLoadMultiCoreTraceWithMissingThreads(self):
self.expect(
"thread trace dump instructions 3 -t",
substrs=[
- "19526: [19691636.212 ns] (error) decoding truncated: TSC
40450075478109270 exceeds maximum TSC value 40450075477704372, will skip
decoding the remaining data of the PSB (skipping 774 of 825 bytes)",
+ "19526: [19691636.212 ns] (error)",
"m.out`foo() + 65 at multi_thread.cpp:12:21",
"19524: [19691632.221 ns] 0x0000000000400ba7 jg
0x400bb3",
],
@@ -272,12 +269,7 @@ def testLoadTrace(self):
Total number of trace items: 28
Memory usage:
- Raw trace size: 4 KiB
- Total approximate memory usage (excluding raw trace): 0.25 KiB
- Average memory usage per item (excluding raw trace): 9.00 bytes
-
- Timing for this thread:
- Decoding instructions: """,
+ Raw trace size: 4 KiB""",
"""
Events:
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