[lld-macho] Fix parsing of --time-trace-{granularity,file}

[int3]

Summary

We needed to use Joined instead of Flag. This wasn't caught
because the relevant test that was copied from LLD-ELF was still
invoking LLD-ELF instead of LLD-MachO...

[int3]

lld/MachO/Driver.cpp

993

LLD-ELF defaults to 500 too

[int3]

update

lld/MachO/Config.h

struct Configuration {
   bool searchDylibsFirst = false;
   bool saveTemps = false;
   bool adhocCodesign = false;
   bool emitFunctionStarts = false;
   bool timeTraceEnabled = false;
   uint32_t headerPad;
   uint32_t dylibCompatibilityVersion = 0;
   uint32_t dylibCurrentVersion = 0;
-  uint32_t timeTraceGranularity = 0;
+  uint32_t timeTraceGranularity = 500;
   std::string progName;
   llvm::StringRef installName;
   llvm::StringRef mapFile;
   llvm::StringRef outputFile;
   llvm::StringRef ltoObjPath;
   bool demangle = false;
   llvm::MachO::Target target;
   PlatformInfo platformInfo;

lld/MachO/Driver.cpp

message(StringRef("Framework search paths:") +
             (config->frameworkSearchPaths.size()
                  ? "\n\t" + join(config->frameworkSearchPaths, "\n\t")
                  : ""));
   }
 
   config->progName = argsArr[0];
 
   config->timeTraceEnabled = args.hasArg(OPT_time_trace);
+  config->timeTraceGranularity =
+      args::getInteger(args, OPT_time_trace_granularity_eq, 500);
 
   // Initialize time trace profiler.
   if (config->timeTraceEnabled)
     timeTraceProfilerInitialize(config->timeTraceGranularity, config->progName);
 
   {
-    TimeTraceScope timeScope("Link", StringRef("ExecuteLinker"));
+    TimeTraceScope timeScope("ExecuteLinker");
 
     initLLVM(); // must be run before any call to addFile()
 
     for (const Arg *arg : args) {
       const Option &opt = arg->getOption();
       warnIfDeprecatedOption(opt);
       warnIfUnimplementedOption(opt);
     }

lld/MachO/Options.td

def version: Flag<["--"], "version">,
     Group<grp_lld>;
 def lto_legacy_pass_manager: Flag<["--"], "lto-legacy-pass-manager">,
     HelpText<"Use the legacy pass manager in LLVM">,
     Group<grp_lld>;
 def no_lto_legacy_pass_manager : Flag<["--"], "no-lto-legacy-pass-manager">,
     HelpText<"Use the new pass manager in LLVM">,
     Group<grp_lld>;
 def time_trace: Flag<["--"], "time-trace">, HelpText<"Record time trace">;
-def time_trace_granularity: Flag<["--"], "time-trace-granularity">,
+def time_trace_granularity_eq: Joined<["--"], "time-trace-granularity=">,
     HelpText<"Minimum time granularity (in microseconds) traced by time profiler">;
-def time_trace_file_eq: Flag<["--"], "time-trace-file=">, HelpText<"Specify time trace output file">;
+def time_trace_file_eq: Joined<["--"], "time-trace-file=">, HelpText<"Specify time trace output file">;
 
 // This is a complete Options.td compiled from Apple's ld(1) manpage
 // dated 2018-03-07 and cross checked with ld64 source code in repo
 // https://github.com/apple-opensource/ld64 at git tag "512.4" dated
 // 2018-03-18.
 
 // Flags<[HelpHidden]> marks options that are not yet ported to lld,
 // and serve as a scoreboard for annotating our progress toward

lld/test/MachO/time-trace.s

 # REQUIRES: x86
-# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
+# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t.o
 
 # Test implicit trace file name
-# RUN: ld.lld --time-trace --time-trace-granularity=0 -o %t1.macho %t.o
+# RUN: %lld --time-trace --time-trace-granularity=0 -o %t1.macho %t.o
 # RUN: cat %t1.macho.time-trace \
 # RUN:   | %python -c 'import json, sys; json.dump(json.loads(sys.stdin.read()), sys.stdout, sort_keys=True, indent=2)' \
 # RUN:   | FileCheck %s
 
 # Test specified trace file name
-# RUN: ld.lld --time-trace --time-trace-file=%t2.json --time-trace-granularity=0 -o %t2.macho %t.o
+# RUN: %lld --time-trace --time-trace-file=%t2.json --time-trace-granularity=0 -o %t2.macho %t.o
 # RUN: cat %t2.json \
 # RUN:   | %python -c 'import json, sys; json.dump(json.loads(sys.stdin.read()), sys.stdout, sort_keys=True, indent=2)' \
 # RUN:   | FileCheck %s
 
 # Test trace requested to stdout
-# RUN: ld.lld --time-trace --time-trace-file=- --time-trace-granularity=0 -o %t3.macho %t.o \
+# RUN: %lld --time-trace --time-trace-file=- --time-trace-granularity=0 -o %t3.macho %t.o \
 # RUN:   | %python -c 'import json, sys; json.dump(json.loads(sys.stdin.read()), sys.stdout, sort_keys=True, indent=2)' \
 # RUN:   | FileCheck %s
 
 # CHECK:      "beginningOfTime": {{[0-9]{16},}}
 # CHECK-NEXT: "traceEvents": [
 
 # Check one event has correct fields
 # CHECK:      "dur":
 # CHECK-NEXT: "name":
 # CHECK-NEXT: "ph":
 # CHECK-NEXT: "pid":
 # CHECK-NEXT: "tid":
 # CHECK-NEXT: "ts":
 
 # Check there is an ExecuteLinker event
 # CHECK: "name": "ExecuteLinker"
 
 # Check process_name entry field
-# CHECK: "name": "ld.lld{{(.exe)?}}"
+# CHECK: "name": "ld64.lld{{(.exe)?}}"
 # CHECK: "name": "process_name"
 # CHECK: "name": "thread_name"
 
-.globl _start
-_start:
+.globl _main
+_main:
   ret