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Use -fdebug-compilation-dir to form absolute paths in coverage mappings 

This allows users to explicitly request relative paths with
`-fdebug-compilation-dir .`.

Fixes PR43614

Reviewers: vsk, arphaman

Differential Revision: https://reviews.llvm.org/D68733

llvm-svn: 374266
This commit is contained in:
Reid Kleckner 2019-10-10 00:54:33 +00:00
parent b577efe456
commit f6777964bd
3 changed files with 40 additions and 9 deletions
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25
clang/lib/CodeGen/CoverageMappingGen.cpp
View File

@ -1278,13 +1278,6 @@ std::string getCoverageSection(const CodeGenModule &CGM) {
CGM.getContext().getTargetInfo().getTriple().getObjectFormat());
}
std::string normalizeFilename(StringRef Filename) {
llvm::SmallString<256> Path(Filename);
llvm::sys::fs::make_absolute(Path);
llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
return Path.str().str();
}
} // end anonymous namespace
static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
@ -1317,6 +1310,24 @@ static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
}
}
CoverageMappingModuleGen::CoverageMappingModuleGen(
CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
: CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {
// Honor -fdebug-compilation-dir in paths in coverage data. Otherwise, use the
// regular working directory when normalizing paths.
if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
CWD = CGM.getCodeGenOpts().DebugCompilationDir;
else
llvm::sys::fs::current_path(CWD);
}
std::string CoverageMappingModuleGen::normalizeFilename(StringRef Filename) {
llvm::SmallString<256> Path(Filename);
llvm::sys::fs::make_absolute(CWD, Path);
llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
return Path.str().str();
}
void CoverageMappingModuleGen::addFunctionMappingRecord(
llvm::GlobalVariable *NamePtr, StringRef NameValue, uint64_t FuncHash,
const std::string &CoverageMapping, bool IsUsed) {

8
clang/lib/CodeGen/CoverageMappingGen.h
View File

@ -54,10 +54,14 @@ class CoverageMappingModuleGen {
std::vector<llvm::Constant *> FunctionNames;
llvm::StructType *FunctionRecordTy;
std::vector<std::string> CoverageMappings;
SmallString<256> CWD;
/// Make the filename absolute, remove dots, and normalize slashes to local
/// path style.
std::string normalizeFilename(StringRef Filename);
public:
CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
: CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo);
CoverageSourceInfo &getSourceInfo() const {
return SourceInfo;

16
clang/test/CoverageMapping/debug-dir.cpp Normal file
View File

@ -0,0 +1,16 @@
// %s expands to an absolute path, so to test relative paths we need to create a
// clean directory, put the source there, and cd into it.
// RUN: rm -rf %t
// RUN: mkdir -p %t/foobar
// RUN: cd %t
// RUN: cp %s foobar/debug-dir.cpp
// RUN: %clang_cc1 -fprofile-instrument=clang -fcoverage-mapping -emit-llvm -main-file-name debug-dir.cpp foobar/debug-dir.cpp -o - | FileCheck -check-prefix=ABSOLUTE %s
//
// ABSOLUTE: @__llvm_coverage_mapping = {{.*"\\01.*clang.*test.*CoverageMapping.*.*foobar.*debug-dir\.cpp}}
// RUN: %clang_cc1 -fprofile-instrument=clang -fcoverage-mapping -emit-llvm -main-file-name debug-dir.cpp foobar/debug-dir.cpp -fdebug-compilation-dir . -o - | FileCheck -check-prefix=RELATIVE %s
//
// RELATIVE: @__llvm_coverage_mapping = {{.*"\\01[^/]*foobar.*debug-dir\.cpp}}
void f1() {}