aaboud added a subscriber: bwyma.
aaboud updated this revision to Diff 81640.
aaboud added a comment.
Moved getChecksum from SourceManager to CGDebugInfo.
Also, now checksum is emitted only for CodeView.
https://reviews.llvm.org/D27641
Files:
lib/CodeGen/CGDebugInfo.cpp
lib/CodeGen/CGDebugInfo.h
test/CodeGen/debug-info-file-checksum.c
test/CodeGen/debug-info-file-checksum.c.source
Index: lib/CodeGen/CGDebugInfo.h
===================================================================
--- lib/CodeGen/CGDebugInfo.h
+++ lib/CodeGen/CGDebugInfo.h
@@ -442,6 +442,10 @@
/// Remap a given path with the current debug prefix map
std::string remapDIPath(StringRef) const;
+ /// Get the file checksum debug info for input file ID.
+ llvm::DIFile::ChecksumKind getChecksum(FileID FID,
+ SmallString<32> &Checksum) const;
+
/// Get the file debug info descriptor for the input location.
llvm::DIFile *getOrCreateFile(SourceLocation Loc);
Index: lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- lib/CodeGen/CGDebugInfo.cpp
+++ lib/CodeGen/CGDebugInfo.cpp
@@ -41,6 +41,7 @@
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MD5.h"
#include "llvm/Support/Path.h"
using namespace clang;
using namespace clang::CodeGen;
@@ -320,19 +321,46 @@
return StringRef();
}
+llvm::DIFile::ChecksumKind
+CGDebugInfo::getChecksum(FileID FID, SmallString<32> &Checksum) const {
+ Checksum.clear();
+
+ if (!CGM.getCodeGenOpts().EmitCodeView)
+ return llvm::DIFile::CSK_None;
+
+ SourceManager &SM = CGM.getContext().getSourceManager();
+ bool Invalid;
+ llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid);
+ if (Invalid)
+ return llvm::DIFile::CSK_None;
+
+ llvm::MD5 Hash;
+ llvm::MD5::MD5Result Result;
+
+ Hash.update(MemBuffer->getBuffer());
+ Hash.final(Result);
+
+ Hash.stringifyResult(Result, Checksum);
+ return llvm::DIFile::CSK_MD5;
+}
+
llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
if (!Loc.isValid())
// If Location is not valid then use main input file.
return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
- remapDIPath(TheCU->getDirectory()));
+ remapDIPath(TheCU->getDirectory()),
+ TheCU->getFile()->getChecksumKind(),
+ TheCU->getFile()->getChecksum());
SourceManager &SM = CGM.getContext().getSourceManager();
PresumedLoc PLoc = SM.getPresumedLoc(Loc);
if (PLoc.isInvalid() || StringRef(PLoc.getFilename()).empty())
// If the location is not valid then use main input file.
return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
- remapDIPath(TheCU->getDirectory()));
+ remapDIPath(TheCU->getDirectory()),
+ TheCU->getFile()->getChecksumKind(),
+ TheCU->getFile()->getChecksum());
// Cache the results.
const char *fname = PLoc.getFilename();
@@ -344,16 +372,22 @@
return cast<llvm::DIFile>(V);
}
+ SmallString<32> Checksum;
+ llvm::DIFile::ChecksumKind CSKind = getChecksum(SM.getFileID(Loc), Checksum);
+
llvm::DIFile *F = DBuilder.createFile(remapDIPath(PLoc.getFilename()),
- remapDIPath(getCurrentDirname()));
+ remapDIPath(getCurrentDirname()),
+ CSKind, Checksum);
DIFileCache[fname].reset(F);
return F;
}
llvm::DIFile *CGDebugInfo::getOrCreateMainFile() {
return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
- remapDIPath(TheCU->getDirectory()));
+ remapDIPath(TheCU->getDirectory()),
+ TheCU->getFile()->getChecksumKind(),
+ TheCU->getFile()->getChecksum());
}
std::string CGDebugInfo::remapDIPath(StringRef Path) const {
@@ -396,6 +430,8 @@
}
void CGDebugInfo::CreateCompileUnit() {
+ SmallString<32> Checksum;
+ llvm::DIFile::ChecksumKind CSKind = llvm::DIFile::CSK_None;
// Should we be asking the SourceManager for the main file name, instead of
// accepting it as an argument? This just causes the main file name to
@@ -422,6 +458,7 @@
llvm::sys::path::append(MainFileDirSS, MainFileName);
MainFileName = MainFileDirSS.str();
}
+ CSKind = getChecksum(SM.getMainFileID(), Checksum);
}
llvm::dwarf::SourceLanguage LangTag;
@@ -467,7 +504,8 @@
// FIXME - Eliminate TheCU.
TheCU = DBuilder.createCompileUnit(
LangTag, DBuilder.createFile(remapDIPath(MainFileName),
- remapDIPath(getCurrentDirname())),
+ remapDIPath(getCurrentDirname()), CSKind,
+ Checksum),
Producer, LO.Optimize, CGM.getCodeGenOpts().DwarfDebugFlags, RuntimeVers,
CGM.getCodeGenOpts().SplitDwarfFile, EmissionKind, 0 /* DWOid */,
CGM.getCodeGenOpts().SplitDwarfInlining);
Index: test/CodeGen/debug-info-file-checksum.c
===================================================================
--- test/CodeGen/debug-info-file-checksum.c
+++ test/CodeGen/debug-info-file-checksum.c
@@ -0,0 +1,5 @@
+// RUN: %clang -emit-llvm -S -g -gcodeview -x c %s.source -o - | FileCheck %s
+
+// Check that "checksum" is created correctly for the compiled file.
+
+// CHECK: !DIFile(filename:{{.*}}, directory:{{.*}}, checksumkind: CSK_MD5, checksum: "a3b7d27af071accdeccaa933fc603608")
Index: test/CodeGen/debug-info-file-checksum.c.source
===================================================================
--- test/CodeGen/debug-info-file-checksum.c.source
+++ test/CodeGen/debug-info-file-checksum.c.source
@@ -0,0 +1,3 @@
+int foo(int x) {
+ return x+1;
+}
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