[llvm-cov] Disable name and path truncation
[oota-llvm.git] / tools / llvm-cov / TestingSupport.cpp
1 //===- TestingSupport.cpp - Convert objects files into test files --------===//
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 #include "llvm/Object/ObjectFile.h"
11 #include "llvm/Support/CommandLine.h"
12 #include "llvm/Support/LEB128.h"
13 #include "llvm/Support/ManagedStatic.h"
14 #include "llvm/Support/PrettyStackTrace.h"
15 #include "llvm/Support/Signals.h"
16 #include "llvm/Support/raw_ostream.h"
17 #include <functional>
18 #include <system_error>
19
20 using namespace llvm;
21 using namespace object;
22
23 int convertForTestingMain(int argc, const char *argv[]) {
24   sys::PrintStackTraceOnErrorSignal();
25   PrettyStackTraceProgram X(argc, argv);
26   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
27
28   cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
29                                        cl::desc("<Source file>"));
30
31   cl::opt<std::string> OutputFilename(
32       "o", cl::Required,
33       cl::desc(
34           "File with the profile data obtained after an instrumented run"));
35
36   cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
37
38   auto ObjErr = llvm::object::ObjectFile::createObjectFile(InputSourceFile);
39   if (auto Err = ObjErr.getError()) {
40     errs() << "error: " << Err.message() << "\n";
41     return 1;
42   }
43   ObjectFile *OF = ObjErr.get().getBinary();
44   auto BytesInAddress = OF->getBytesInAddress();
45   if (BytesInAddress != 8) {
46     errs() << "error: 64 bit binary expected\n";
47     return 1;
48   }
49
50   // Look for the sections that we are interested in.
51   int FoundSectionCount = 0;
52   SectionRef ProfileNames, CoverageMapping;
53   for (const auto &Section : OF->sections()) {
54     StringRef Name;
55     if (Section.getName(Name))
56       return 1;
57     if (Name == "__llvm_prf_names") {
58       ProfileNames = Section;
59     } else if (Name == "__llvm_covmap") {
60       CoverageMapping = Section;
61     } else
62       continue;
63     ++FoundSectionCount;
64   }
65   if (FoundSectionCount != 2)
66     return 1;
67
68   // Get the contents of the given sections.
69   uint64_t ProfileNamesAddress = ProfileNames.getAddress();
70   StringRef CoverageMappingData;
71   StringRef ProfileNamesData;
72   if (CoverageMapping.getContents(CoverageMappingData) ||
73       ProfileNames.getContents(ProfileNamesData))
74     return 1;
75
76   int FD;
77   if (auto Err =
78           sys::fs::openFileForWrite(OutputFilename, FD, sys::fs::F_None)) {
79     errs() << "error: " << Err.message() << "\n";
80     return 1;
81   }
82
83   raw_fd_ostream OS(FD, true);
84   OS << "llvmcovmtestdata";
85   encodeULEB128(ProfileNamesData.size(), OS);
86   encodeULEB128(ProfileNamesAddress, OS);
87   OS << ProfileNamesData << CoverageMappingData;
88
89   return 0;
90 }