1 #include "bolt/Profile/DataAggregator.h"
2 #include "bolt/Rewrite/RewriteInstance.h"
3 #include "bolt/Utils/CommandLineOpts.h"
4 #include "llvm/MC/TargetRegistry.h"
5 #include "llvm/Object/Binary.h"
6 #include "llvm/Support/CommandLine.h"
7 #include "llvm/Support/Errc.h"
8 #include "llvm/Support/Error.h"
9 #include "llvm/Support/Path.h"
10 #include "llvm/Support/TargetSelect.h"
11 
12 using namespace llvm;
13 using namespace bolt;
14 
15 namespace opts {
16 
17 static cl::OptionCategory *HeatmapCategories[] = {&HeatmapCategory,
18                                                   &BoltOutputCategory};
19 
20 static cl::opt<std::string> InputFilename(cl::Positional,
21                                           cl::desc("<executable>"),
22                                           cl::Required,
23                                           cl::cat(HeatmapCategory));
24 
25 } // namespace opts
26 
27 static StringRef ToolName;
28 
29 static void report_error(StringRef Message, std::error_code EC) {
30   assert(EC);
31   errs() << ToolName << ": '" << Message << "': " << EC.message() << ".\n";
32   exit(1);
33 }
34 
35 static void report_error(StringRef Message, Error E) {
36   assert(E);
37   errs() << ToolName << ": '" << Message << "': " << toString(std::move(E))
38          << ".\n";
39   exit(1);
40 }
41 
42 static std::string GetExecutablePath(const char *Argv0) {
43   SmallString<256> ExecutablePath(Argv0);
44   // Do a PATH lookup if Argv0 isn't a valid path.
45   if (!llvm::sys::fs::exists(ExecutablePath))
46     if (llvm::ErrorOr<std::string> P =
47             llvm::sys::findProgramByName(ExecutablePath))
48       ExecutablePath = *P;
49   return std::string(ExecutablePath.str());
50 }
51 
52 int main(int argc, char **argv) {
53   cl::HideUnrelatedOptions(makeArrayRef(opts::HeatmapCategories));
54   cl::ParseCommandLineOptions(argc, argv, "");
55 
56   if (opts::PerfData.empty()) {
57     errs() << ToolName << ": expected -perfdata=<filename> option.\n";
58     exit(1);
59   }
60 
61   opts::HeatmapMode = true;
62   opts::AggregateOnly = true;
63   if (!sys::fs::exists(opts::InputFilename))
64     report_error(opts::InputFilename, errc::no_such_file_or_directory);
65 
66   // Output to stdout by default
67   if (opts::OutputFilename.empty())
68     opts::OutputFilename = "-";
69 
70   // Initialize targets and assembly printers/parsers.
71   llvm::InitializeAllTargetInfos();
72   llvm::InitializeAllTargetMCs();
73   llvm::InitializeAllAsmParsers();
74   llvm::InitializeAllDisassemblers();
75 
76   llvm::InitializeAllTargets();
77   llvm::InitializeAllAsmPrinters();
78 
79   ToolName = argv[0];
80   std::string ToolPath = GetExecutablePath(argv[0]);
81   Expected<OwningBinary<Binary>> BinaryOrErr =
82       createBinary(opts::InputFilename);
83   if (Error E = BinaryOrErr.takeError())
84     report_error(opts::InputFilename, std::move(E));
85   Binary &Binary = *BinaryOrErr.get().getBinary();
86 
87   if (auto *e = dyn_cast<ELFObjectFileBase>(&Binary)) {
88     auto RIOrErr =
89         RewriteInstance::createRewriteInstance(e, argc, argv, ToolPath);
90     if (Error E = RIOrErr.takeError())
91       report_error("RewriteInstance", std::move(E));
92 
93     RewriteInstance &RI = *RIOrErr.get();
94     if (Error E = RI.setProfile(opts::PerfData))
95       report_error(opts::PerfData, std::move(E));
96 
97     if (Error E = RI.run())
98       report_error(opts::InputFilename, std::move(E));
99   } else {
100     report_error(opts::InputFilename, object_error::invalid_file_type);
101   }
102 
103   return EXIT_SUCCESS;
104 }
105