cd8122b27f
Add statistics about the memory usage of the string pool. I'm particularly interested in the memory used by the allocator, i.e. the number of bytes actually used by the allocator it self as well as the number of bytes allocated through the allocator. Differential revision: https://reviews.llvm.org/D117914
244 lines
9.6 KiB
C++
244 lines
9.6 KiB
C++
//===-- Statistics.cpp ----------------------------------------------------===//
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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/Target/Statistics.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/UnixSignals.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace llvm;
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static void EmplaceSafeString(llvm::json::Object &obj, llvm::StringRef key,
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const std::string &str) {
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if (str.empty())
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return;
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if (LLVM_LIKELY(llvm::json::isUTF8(str)))
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obj.try_emplace(key, str);
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else
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obj.try_emplace(key, llvm::json::fixUTF8(str));
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}
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json::Value StatsSuccessFail::ToJSON() const {
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return json::Object{{"successes", successes}, {"failures", failures}};
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}
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static double elapsed(const StatsTimepoint &start, const StatsTimepoint &end) {
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StatsDuration::Duration elapsed =
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end.time_since_epoch() - start.time_since_epoch();
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return elapsed.count();
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}
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void TargetStats::CollectStats(Target &target) {
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m_module_identifiers.clear();
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for (ModuleSP module_sp : target.GetImages().Modules())
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m_module_identifiers.emplace_back((intptr_t)module_sp.get());
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}
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json::Value ModuleStats::ToJSON() const {
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json::Object module;
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EmplaceSafeString(module, "path", path);
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EmplaceSafeString(module, "uuid", uuid);
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EmplaceSafeString(module, "triple", triple);
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module.try_emplace("identifier", identifier);
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module.try_emplace("symbolTableParseTime", symtab_parse_time);
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module.try_emplace("symbolTableIndexTime", symtab_index_time);
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module.try_emplace("symbolTableLoadedFromCache", symtab_loaded_from_cache);
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module.try_emplace("symbolTableSavedToCache", symtab_saved_to_cache);
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module.try_emplace("debugInfoParseTime", debug_parse_time);
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module.try_emplace("debugInfoIndexTime", debug_index_time);
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module.try_emplace("debugInfoByteSize", (int64_t)debug_info_size);
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module.try_emplace("debugInfoIndexLoadedFromCache",
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debug_info_index_loaded_from_cache);
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module.try_emplace("debugInfoIndexSavedToCache",
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debug_info_index_saved_to_cache);
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return module;
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}
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llvm::json::Value ConstStringStats::ToJSON() const {
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json::Object obj;
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obj.try_emplace<int64_t>("bytesTotal", stats.GetBytesTotal());
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obj.try_emplace<int64_t>("bytesUsed", stats.GetBytesUsed());
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obj.try_emplace<int64_t>("bytesUnused", stats.GetBytesUnused());
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return obj;
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}
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json::Value TargetStats::ToJSON(Target &target) {
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CollectStats(target);
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json::Array json_module_uuid_array;
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for (auto module_identifier : m_module_identifiers)
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json_module_uuid_array.emplace_back(module_identifier);
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json::Object target_metrics_json{
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{m_expr_eval.name, m_expr_eval.ToJSON()},
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{m_frame_var.name, m_frame_var.ToJSON()},
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{"moduleIdentifiers", std::move(json_module_uuid_array)}};
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if (m_launch_or_attach_time && m_first_private_stop_time) {
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double elapsed_time =
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elapsed(*m_launch_or_attach_time, *m_first_private_stop_time);
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target_metrics_json.try_emplace("launchOrAttachTime", elapsed_time);
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}
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if (m_launch_or_attach_time && m_first_public_stop_time) {
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double elapsed_time =
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elapsed(*m_launch_or_attach_time, *m_first_public_stop_time);
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target_metrics_json.try_emplace("firstStopTime", elapsed_time);
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}
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target_metrics_json.try_emplace("targetCreateTime",
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m_create_time.get().count());
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json::Array breakpoints_array;
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double totalBreakpointResolveTime = 0.0;
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// Rport both the normal breakpoint list and the internal breakpoint list.
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for (int i = 0; i < 2; ++i) {
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BreakpointList &breakpoints = target.GetBreakpointList(i == 1);
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std::unique_lock<std::recursive_mutex> lock;
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breakpoints.GetListMutex(lock);
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size_t num_breakpoints = breakpoints.GetSize();
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for (size_t i = 0; i < num_breakpoints; i++) {
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Breakpoint *bp = breakpoints.GetBreakpointAtIndex(i).get();
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breakpoints_array.push_back(bp->GetStatistics());
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totalBreakpointResolveTime += bp->GetResolveTime().count();
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}
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}
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ProcessSP process_sp = target.GetProcessSP();
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if (process_sp) {
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UnixSignalsSP unix_signals_sp = process_sp->GetUnixSignals();
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if (unix_signals_sp)
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target_metrics_json.try_emplace("signals",
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unix_signals_sp->GetHitCountStatistics());
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uint32_t stop_id = process_sp->GetStopID();
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target_metrics_json.try_emplace("stopCount", stop_id);
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}
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target_metrics_json.try_emplace("breakpoints", std::move(breakpoints_array));
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target_metrics_json.try_emplace("totalBreakpointResolveTime",
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totalBreakpointResolveTime);
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return target_metrics_json;
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}
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void TargetStats::SetLaunchOrAttachTime() {
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m_launch_or_attach_time = StatsClock::now();
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m_first_private_stop_time = llvm::None;
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}
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void TargetStats::SetFirstPrivateStopTime() {
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// Launching and attaching has many paths depending on if synchronous mode
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// was used or if we are stopping at the entry point or not. Only set the
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// first stop time if it hasn't already been set.
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if (!m_first_private_stop_time)
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m_first_private_stop_time = StatsClock::now();
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}
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void TargetStats::SetFirstPublicStopTime() {
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// Launching and attaching has many paths depending on if synchronous mode
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// was used or if we are stopping at the entry point or not. Only set the
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// first stop time if it hasn't already been set.
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if (!m_first_public_stop_time)
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m_first_public_stop_time = StatsClock::now();
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}
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bool DebuggerStats::g_collecting_stats = false;
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llvm::json::Value DebuggerStats::ReportStatistics(Debugger &debugger,
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Target *target) {
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json::Array json_targets;
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json::Array json_modules;
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double symtab_parse_time = 0.0;
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double symtab_index_time = 0.0;
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double debug_parse_time = 0.0;
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double debug_index_time = 0.0;
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uint32_t symtabs_loaded = 0;
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uint32_t symtabs_saved = 0;
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uint32_t debug_index_loaded = 0;
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uint32_t debug_index_saved = 0;
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uint64_t debug_info_size = 0;
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if (target) {
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json_targets.emplace_back(target->ReportStatistics());
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} else {
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for (const auto &target : debugger.GetTargetList().Targets())
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json_targets.emplace_back(target->ReportStatistics());
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}
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std::vector<ModuleStats> modules;
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std::lock_guard<std::recursive_mutex> guard(
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Module::GetAllocationModuleCollectionMutex());
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const size_t num_modules = Module::GetNumberAllocatedModules();
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for (size_t image_idx = 0; image_idx < num_modules; ++image_idx) {
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Module *module = Module::GetAllocatedModuleAtIndex(image_idx);
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ModuleStats module_stat;
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module_stat.identifier = (intptr_t)module;
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module_stat.path = module->GetFileSpec().GetPath();
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if (ConstString object_name = module->GetObjectName()) {
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module_stat.path.append(1, '(');
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module_stat.path.append(object_name.GetStringRef().str());
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module_stat.path.append(1, ')');
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}
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module_stat.uuid = module->GetUUID().GetAsString();
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module_stat.triple = module->GetArchitecture().GetTriple().str();
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module_stat.symtab_parse_time = module->GetSymtabParseTime().get().count();
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module_stat.symtab_index_time = module->GetSymtabIndexTime().get().count();
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Symtab *symtab = module->GetSymtab();
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if (symtab) {
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module_stat.symtab_loaded_from_cache = symtab->GetWasLoadedFromCache();
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if (module_stat.symtab_loaded_from_cache)
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++symtabs_loaded;
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module_stat.symtab_saved_to_cache = symtab->GetWasSavedToCache();
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if (module_stat.symtab_saved_to_cache)
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++symtabs_saved;
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}
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SymbolFile *sym_file = module->GetSymbolFile();
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if (sym_file) {
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module_stat.debug_index_time = sym_file->GetDebugInfoIndexTime().count();
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module_stat.debug_parse_time = sym_file->GetDebugInfoParseTime().count();
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module_stat.debug_info_size = sym_file->GetDebugInfoSize();
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module_stat.debug_info_index_loaded_from_cache =
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sym_file->GetDebugInfoIndexWasLoadedFromCache();
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if (module_stat.debug_info_index_loaded_from_cache)
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++debug_index_loaded;
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module_stat.debug_info_index_saved_to_cache =
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sym_file->GetDebugInfoIndexWasSavedToCache();
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if (module_stat.debug_info_index_saved_to_cache)
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++debug_index_saved;
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}
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symtab_parse_time += module_stat.symtab_parse_time;
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symtab_index_time += module_stat.symtab_index_time;
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debug_parse_time += module_stat.debug_parse_time;
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debug_index_time += module_stat.debug_index_time;
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debug_info_size += module_stat.debug_info_size;
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json_modules.emplace_back(module_stat.ToJSON());
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}
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ConstStringStats const_string_stats;
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json::Object json_memory{
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{"strings", const_string_stats.ToJSON()},
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};
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json::Object global_stats{
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{"targets", std::move(json_targets)},
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{"modules", std::move(json_modules)},
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{"memory", std::move(json_memory)},
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{"totalSymbolTableParseTime", symtab_parse_time},
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{"totalSymbolTableIndexTime", symtab_index_time},
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{"totalSymbolTablesLoadedFromCache", symtabs_loaded},
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{"totalSymbolTablesSavedToCache", symtabs_saved},
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{"totalDebugInfoParseTime", debug_parse_time},
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{"totalDebugInfoIndexTime", debug_index_time},
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{"totalDebugInfoIndexLoadedFromCache", debug_index_loaded},
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{"totalDebugInfoIndexSavedToCache", debug_index_saved},
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{"totalDebugInfoByteSize", debug_info_size},
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};
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return std::move(global_stats);
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}
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