dongjunduo created this revision.
Herald added a project: All.
dongjunduo requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay.
Herald added a project: clang.
The time profiler traces the stages during the clang compile
process. Each compiling stage of a single source file
corresponds to a separately .json file which holds its
time tracing data. However, the .json files are stored in the
same path/directory as its corresponding stage's '-o' option.
For example, if we compile the "demo.cc" to "demo.o" with option
"-o /tmp/demo.o", the time trace data file path is "/tmp/demo.json".
A typical c++ project can contain multiple source files in different
path, but all the json files' paths can be a mess.
The option "-ftime-trace-path" allows you to specify where the json
files should be stored. This allows the users to place the time trace
data files of interest in the desired location for further data analysis.
Usage:
clang/clang++ -ftime-trace -ftime-trace-path=/path-you-want/ ...
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D128048
Files:
clang/include/clang/Driver/Options.td
clang/include/clang/Frontend/FrontendOptions.h
clang/lib/Driver/ToolChains/Clang.cpp
clang/tools/driver/cc1_main.cpp
Index: clang/tools/driver/cc1_main.cpp
===================================================================
--- clang/tools/driver/cc1_main.cpp
+++ clang/tools/driver/cc1_main.cpp
@@ -254,8 +254,9 @@
llvm::TimerGroup::clearAll();
if (llvm::timeTraceProfilerEnabled()) {
- SmallString<128> Path(Clang->getFrontendOpts().OutputFile);
- llvm::sys::path::replace_extension(Path, "json");
+ SmallString<128> Path(Clang->getFrontendOpts().TimeTracePath);
+
Path.append(llvm::sys::path::filename(Clang->getFrontendOpts().OutputFile));
+ Path.append(".json");
if (auto profilerOutput = Clang->createOutputFile(
Path.str(), /*Binary=*/false, /*RemoveFileOnSignal=*/false,
/*useTemporary=*/false)) {
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -6183,6 +6183,7 @@
Args.AddLastArg(CmdArgs, options::OPT_ftime_report_EQ);
Args.AddLastArg(CmdArgs, options::OPT_ftime_trace);
Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_granularity_EQ);
+ Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_path);
Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
Args.AddLastArg(CmdArgs, options::OPT_malign_double);
Args.AddLastArg(CmdArgs, options::OPT_fno_temp_file);
Index: clang/include/clang/Frontend/FrontendOptions.h
===================================================================
--- clang/include/clang/Frontend/FrontendOptions.h
+++ clang/include/clang/Frontend/FrontendOptions.h
@@ -499,6 +499,9 @@
/// Minimum time granularity (in microseconds) traced by time profiler.
unsigned TimeTraceGranularity;
+ /// Path which stores the output files of time profiler.
+ std::string TimeTracePath;
+
public:
FrontendOptions()
: DisableFree(false), RelocatablePCH(false), ShowHelp(false),
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2828,6 +2828,10 @@
HelpText<"Minimum time granularity (in microseconds) traced by time
profiler">,
Flags<[CC1Option, CoreOption]>,
MarshallingInfoInt<FrontendOpts<"TimeTraceGranularity">, "500u">;
+def ftime_trace_path : Joined<["-"], "ftime-trace-path=">, Group<f_Group>,
+ HelpText<"Path which stores the output files of time profiler">,
+ Flags<[CC1Option, CoreOption]>,
+ MarshallingInfoString<FrontendOpts<"TimeTracePath">>;
def fproc_stat_report : Joined<["-"], "fproc-stat-report">, Group<f_Group>,
HelpText<"Print subprocess statistics">;
def fproc_stat_report_EQ : Joined<["-"], "fproc-stat-report=">, Group<f_Group>,
Index: clang/tools/driver/cc1_main.cpp
===================================================================
--- clang/tools/driver/cc1_main.cpp
+++ clang/tools/driver/cc1_main.cpp
@@ -254,8 +254,9 @@
llvm::TimerGroup::clearAll();
if (llvm::timeTraceProfilerEnabled()) {
- SmallString<128> Path(Clang->getFrontendOpts().OutputFile);
- llvm::sys::path::replace_extension(Path, "json");
+ SmallString<128> Path(Clang->getFrontendOpts().TimeTracePath);
+ Path.append(llvm::sys::path::filename(Clang->getFrontendOpts().OutputFile));
+ Path.append(".json");
if (auto profilerOutput = Clang->createOutputFile(
Path.str(), /*Binary=*/false, /*RemoveFileOnSignal=*/false,
/*useTemporary=*/false)) {
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -6183,6 +6183,7 @@
Args.AddLastArg(CmdArgs, options::OPT_ftime_report_EQ);
Args.AddLastArg(CmdArgs, options::OPT_ftime_trace);
Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_granularity_EQ);
+ Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_path);
Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
Args.AddLastArg(CmdArgs, options::OPT_malign_double);
Args.AddLastArg(CmdArgs, options::OPT_fno_temp_file);
Index: clang/include/clang/Frontend/FrontendOptions.h
===================================================================
--- clang/include/clang/Frontend/FrontendOptions.h
+++ clang/include/clang/Frontend/FrontendOptions.h
@@ -499,6 +499,9 @@
/// Minimum time granularity (in microseconds) traced by time profiler.
unsigned TimeTraceGranularity;
+ /// Path which stores the output files of time profiler.
+ std::string TimeTracePath;
+
public:
FrontendOptions()
: DisableFree(false), RelocatablePCH(false), ShowHelp(false),
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2828,6 +2828,10 @@
HelpText<"Minimum time granularity (in microseconds) traced by time profiler">,
Flags<[CC1Option, CoreOption]>,
MarshallingInfoInt<FrontendOpts<"TimeTraceGranularity">, "500u">;
+def ftime_trace_path : Joined<["-"], "ftime-trace-path=">, Group<f_Group>,
+ HelpText<"Path which stores the output files of time profiler">,
+ Flags<[CC1Option, CoreOption]>,
+ MarshallingInfoString<FrontendOpts<"TimeTracePath">>;
def fproc_stat_report : Joined<["-"], "fproc-stat-report">, Group<f_Group>,
HelpText<"Print subprocess statistics">;
def fproc_stat_report_EQ : Joined<["-"], "fproc-stat-report=">, Group<f_Group>,
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
