#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/config.h"
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#if LLVM_ENABLE_ZLIB == 1 && HAVE_ZLIB_H
case zlib::DefaultCompression: return Z_DEFAULT_COMPRESSION;
case zlib::BestSizeCompression: return 9;
}
+ llvm_unreachable("Invalid zlib::CompressionLevel!");
}
static zlib::Status encodeZlibReturnValue(int ReturnValue) {
Status Res = encodeZlibReturnValue(::compress2(
(Bytef *)TmpBuffer.get(), &CompressedSize,
(const Bytef *)InputBuffer.data(), InputBuffer.size(), CLevel));
- if (Res == StatusOK)
+ if (Res == StatusOK) {
CompressedBuffer.reset(MemoryBuffer::getMemBufferCopy(
StringRef(TmpBuffer.get(), CompressedSize)));
+ // Tell MSan that memory initialized by zlib is valid.
+ __msan_unpoison(CompressedBuffer->getBufferStart(), CompressedSize);
+ }
return Res;
}
Status Res = encodeZlibReturnValue(
::uncompress((Bytef *)TmpBuffer.get(), (uLongf *)&UncompressedSize,
(const Bytef *)InputBuffer.data(), InputBuffer.size()));
- if (Res == StatusOK)
+ if (Res == StatusOK) {
UncompressedBuffer.reset(MemoryBuffer::getMemBufferCopy(
StringRef(TmpBuffer.get(), UncompressedSize)));
+ // Tell MSan that memory initialized by zlib is valid.
+ __msan_unpoison(UncompressedBuffer->getBufferStart(), UncompressedSize);
+ }
return Res;
}
+uint32_t zlib::crc32(StringRef Buffer) {
+ return ::crc32(0, (const Bytef *)Buffer.data(), Buffer.size());
+}
+
#else
bool zlib::isAvailable() { return false; }
zlib::Status zlib::compress(StringRef InputBuffer,
size_t UncompressedSize) {
return zlib::StatusUnsupported;
}
+uint32_t zlib::crc32(StringRef Buffer) {
+ llvm_unreachable("zlib::crc32 is unavailable");
+}
#endif