llvm-profdata.cpp revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
1//===- llvm-profdata.cpp - LLVM profile data tool -------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// llvm-profdata merges .profdata files.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/ADT/StringRef.h"
15#include "llvm/ProfileData/InstrProfReader.h"
16#include "llvm/ProfileData/InstrProfWriter.h"
17#include "llvm/Support/CommandLine.h"
18#include "llvm/Support/FileSystem.h"
19#include "llvm/Support/Format.h"
20#include "llvm/Support/ManagedStatic.h"
21#include "llvm/Support/MemoryBuffer.h"
22#include "llvm/Support/PrettyStackTrace.h"
23#include "llvm/Support/Signals.h"
24#include "llvm/Support/raw_ostream.h"
25
26using namespace llvm;
27
28static void exitWithError(const Twine &Message, StringRef Whence = "") {
29  errs() << "error: ";
30  if (!Whence.empty())
31    errs() << Whence << ": ";
32  errs() << Message << "\n";
33  ::exit(1);
34}
35
36int merge_main(int argc, const char *argv[]) {
37  cl::list<std::string> Inputs(cl::Positional, cl::Required, cl::OneOrMore,
38                               cl::desc("<filenames...>"));
39
40  cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
41                                      cl::init("-"),
42                                      cl::desc("Output file"));
43  cl::alias OutputFilenameA("o", cl::desc("Alias for --output"), cl::Required,
44                            cl::aliasopt(OutputFilename));
45
46  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
47
48  if (OutputFilename.compare("-") == 0)
49    exitWithError("Cannot write indexed profdata format to stdout.");
50
51  std::string ErrorInfo;
52  raw_fd_ostream Output(OutputFilename.data(), ErrorInfo, sys::fs::F_None);
53  if (!ErrorInfo.empty())
54    exitWithError(ErrorInfo, OutputFilename);
55
56  InstrProfWriter Writer;
57  for (const auto &Filename : Inputs) {
58    std::unique_ptr<InstrProfReader> Reader;
59    if (error_code ec = InstrProfReader::create(Filename, Reader))
60      exitWithError(ec.message(), Filename);
61
62    for (const auto &I : *Reader)
63      if (error_code EC = Writer.addFunctionCounts(I.Name, I.Hash, I.Counts))
64        errs() << Filename << ": " << I.Name << ": " << EC.message() << "\n";
65    if (Reader->hasError())
66      exitWithError(Reader->getError().message(), Filename);
67  }
68  Writer.write(Output);
69
70  return 0;
71}
72
73int show_main(int argc, const char *argv[]) {
74  cl::opt<std::string> Filename(cl::Positional, cl::Required,
75                                cl::desc("<profdata-file>"));
76
77  cl::opt<bool> ShowCounts("counts", cl::init(false),
78                           cl::desc("Show counter values for shown functions"));
79  cl::opt<bool> ShowAllFunctions("all-functions", cl::init(false),
80                                 cl::desc("Details for every function"));
81  cl::opt<std::string> ShowFunction("function",
82                                    cl::desc("Details for matching functions"));
83
84  cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
85                                      cl::init("-"),
86                                      cl::desc("Output file"));
87  cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
88                            cl::aliasopt(OutputFilename));
89
90  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data summary\n");
91
92  std::unique_ptr<InstrProfReader> Reader;
93  if (error_code EC = InstrProfReader::create(Filename, Reader))
94    exitWithError(EC.message(), Filename);
95
96  if (OutputFilename.empty())
97    OutputFilename = "-";
98
99  std::string ErrorInfo;
100  raw_fd_ostream OS(OutputFilename.data(), ErrorInfo, sys::fs::F_Text);
101  if (!ErrorInfo.empty())
102    exitWithError(ErrorInfo, OutputFilename);
103
104  if (ShowAllFunctions && !ShowFunction.empty())
105    errs() << "warning: -function argument ignored: showing all functions\n";
106
107  uint64_t MaxFunctionCount = 0, MaxBlockCount = 0;
108  size_t ShownFunctions = 0, TotalFunctions = 0;
109  for (const auto &Func : *Reader) {
110    bool Show = ShowAllFunctions ||
111                (!ShowFunction.empty() &&
112                 Func.Name.find(ShowFunction) != Func.Name.npos);
113
114    ++TotalFunctions;
115    assert(Func.Counts.size() > 0 && "function missing entry counter");
116    if (Func.Counts[0] > MaxFunctionCount)
117      MaxFunctionCount = Func.Counts[0];
118
119    if (Show) {
120      if (!ShownFunctions)
121        OS << "Counters:\n";
122      ++ShownFunctions;
123
124      OS << "  " << Func.Name << ":\n"
125         << "    Hash: " << format("0x%016" PRIx64, Func.Hash) << "\n"
126         << "    Counters: " << Func.Counts.size() << "\n"
127         << "    Function count: " << Func.Counts[0] << "\n";
128    }
129
130    if (Show && ShowCounts)
131      OS << "    Block counts: [";
132    for (size_t I = 1, E = Func.Counts.size(); I < E; ++I) {
133      if (Func.Counts[I] > MaxBlockCount)
134        MaxBlockCount = Func.Counts[I];
135      if (Show && ShowCounts)
136        OS << (I == 1 ? "" : ", ") << Func.Counts[I];
137    }
138    if (Show && ShowCounts)
139      OS << "]\n";
140  }
141  if (Reader->hasError())
142    exitWithError(Reader->getError().message(), Filename);
143
144  if (ShowAllFunctions || !ShowFunction.empty())
145    OS << "Functions shown: " << ShownFunctions << "\n";
146  OS << "Total functions: " << TotalFunctions << "\n";
147  OS << "Maximum function count: " << MaxFunctionCount << "\n";
148  OS << "Maximum internal block count: " << MaxBlockCount << "\n";
149  return 0;
150}
151
152int main(int argc, const char *argv[]) {
153  // Print a stack trace if we signal out.
154  sys::PrintStackTraceOnErrorSignal();
155  PrettyStackTraceProgram X(argc, argv);
156  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
157
158  StringRef ProgName(sys::path::filename(argv[0]));
159  if (argc > 1) {
160    int (*func)(int, const char *[]) = nullptr;
161
162    if (strcmp(argv[1], "merge") == 0)
163      func = merge_main;
164    else if (strcmp(argv[1], "show") == 0)
165      func = show_main;
166
167    if (func) {
168      std::string Invocation(ProgName.str() + " " + argv[1]);
169      argv[1] = Invocation.c_str();
170      return func(argc - 1, argv + 1);
171    }
172
173    if (strcmp(argv[1], "-h") == 0 ||
174        strcmp(argv[1], "-help") == 0 ||
175        strcmp(argv[1], "--help") == 0) {
176
177      errs() << "OVERVIEW: LLVM profile data tools\n\n"
178             << "USAGE: " << ProgName << " <command> [args...]\n"
179             << "USAGE: " << ProgName << " <command> -help\n\n"
180             << "Available commands: merge, show\n";
181      return 0;
182    }
183  }
184
185  if (argc < 2)
186    errs() << ProgName << ": No command specified!\n";
187  else
188    errs() << ProgName << ": Unknown command!\n";
189
190  errs() << "USAGE: " << ProgName << " <merge|show> [args...]\n";
191  return 1;
192}
193