#include <string>
namespace llvm {
- class Module;
- class ModuleProvider;
- class MemoryBuffer;
- class ModulePass;
class BitstreamWriter;
+ class MemoryBuffer;
+ class DataStreamer;
class LLVMContext;
+ class Module;
+ class ModulePass;
class raw_ostream;
-
- /// getBitcodeModuleProvider - Read the header of the specified bitcode buffer
+
+ /// getLazyBitcodeModule - Read the header of the specified bitcode buffer
/// and prepare for lazy deserialization of function bodies. If successful,
/// this takes ownership of 'buffer' and returns a non-null pointer. On
/// error, this returns null, *does not* take ownership of Buffer, and fills
/// in *ErrMsg with an error description if ErrMsg is non-null.
- ModuleProvider *getBitcodeModuleProvider(MemoryBuffer *Buffer,
- LLVMContext& Context,
- std::string *ErrMsg = 0);
+ Module *getLazyBitcodeModule(MemoryBuffer *Buffer,
+ LLVMContext &Context,
+ std::string *ErrMsg = 0);
+
+ /// getStreamedBitcodeModule - Read the header of the specified stream
+ /// and prepare for lazy deserialization and streaming of function bodies.
+ /// On error, this returns null, and fills in *ErrMsg with an error
+ /// description if ErrMsg is non-null.
+ Module *getStreamedBitcodeModule(const std::string &name,
+ DataStreamer *streamer,
+ LLVMContext &Context,
+ std::string *ErrMsg = 0);
+
+ /// getBitcodeTargetTriple - Read the header of the specified bitcode
+ /// buffer and extract just the triple information. If successful,
+ /// this returns a string and *does not* take ownership
+ /// of 'buffer'. On error, this returns "", and fills in *ErrMsg
+ /// if ErrMsg is non-null.
+ std::string getBitcodeTargetTriple(MemoryBuffer *Buffer,
+ LLVMContext &Context,
+ std::string *ErrMsg = 0);
/// ParseBitcodeFile - Read the specified bitcode file, returning the module.
/// If an error occurs, this returns null and fills in *ErrMsg if it is
/// non-null. This method *never* takes ownership of Buffer.
- Module *ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
+ Module *ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext &Context,
std::string *ErrMsg = 0);
/// WriteBitcodeToFile - Write the specified module to the specified
- /// raw output stream.
+ /// raw output stream. For streams where it matters, the given stream
+ /// should be in "binary" mode.
void WriteBitcodeToFile(const Module *M, raw_ostream &Out);
- /// WriteBitcodeToStream - Write the specified module to the specified
- /// raw output stream.
- void WriteBitcodeToStream(const Module *M, BitstreamWriter &Stream);
-
/// createBitcodeWriterPass - Create and return a pass that writes the module
/// to the specified ostream.
ModulePass *createBitcodeWriterPass(raw_ostream &Str);
-
-
- /// isBitcodeWrapper - Return true fi this is a wrapper for LLVM IR bitcode
- /// files.
- static bool inline isBitcodeWrapper(unsigned char *BufPtr,
- unsigned char *BufEnd) {
- return (BufPtr != BufEnd && BufPtr[0] == 0xDE && BufPtr[1] == 0xC0 &&
- BufPtr[2] == 0x17 && BufPtr[3] == 0x0B);
+
+
+ /// isBitcodeWrapper - Return true if the given bytes are the magic bytes
+ /// for an LLVM IR bitcode wrapper.
+ ///
+ inline bool isBitcodeWrapper(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ // See if you can find the hidden message in the magic bytes :-).
+ // (Hint: it's a little-endian encoding.)
+ return BufPtr != BufEnd &&
+ BufPtr[0] == 0xDE &&
+ BufPtr[1] == 0xC0 &&
+ BufPtr[2] == 0x17 &&
+ BufPtr[3] == 0x0B;
+ }
+
+ /// isRawBitcode - Return true if the given bytes are the magic bytes for
+ /// raw LLVM IR bitcode (without a wrapper).
+ ///
+ inline bool isRawBitcode(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ // These bytes sort of have a hidden message, but it's not in
+ // little-endian this time, and it's a little redundant.
+ return BufPtr != BufEnd &&
+ BufPtr[0] == 'B' &&
+ BufPtr[1] == 'C' &&
+ BufPtr[2] == 0xc0 &&
+ BufPtr[3] == 0xde;
+ }
+
+ /// isBitcode - Return true if the given bytes are the magic bytes for
+ /// LLVM IR bitcode, either with or without a wrapper.
+ ///
+ inline bool isBitcode(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ return isBitcodeWrapper(BufPtr, BufEnd) ||
+ isRawBitcode(BufPtr, BufEnd);
}
-
+
/// SkipBitcodeWrapperHeader - Some systems wrap bc files with a special
/// header for padding or other reasons. The format of this header is:
///
/// uint32_t BitcodeSize; // Size of traditional bitcode file.
/// ... potentially other gunk ...
/// };
- ///
+ ///
/// This function is called when we find a file with a matching magic number.
/// In this case, skip down to the subsection of the file that is actually a
/// BC file.
- static inline bool SkipBitcodeWrapperHeader(unsigned char *&BufPtr,
- unsigned char *&BufEnd) {
+ /// If 'VerifyBufferSize' is true, check that the buffer is large enough to
+ /// contain the whole bitcode file.
+ inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
+ const unsigned char *&BufEnd,
+ bool VerifyBufferSize) {
enum {
KnownHeaderSize = 4*4, // Size of header we read.
OffsetField = 2*4, // Offset in bytes to Offset field.
SizeField = 3*4 // Offset in bytes to Size field.
};
-
+
// Must contain the header!
if (BufEnd-BufPtr < KnownHeaderSize) return true;
-
+
unsigned Offset = ( BufPtr[OffsetField ] |
(BufPtr[OffsetField+1] << 8) |
(BufPtr[OffsetField+2] << 16) |
(BufPtr[SizeField +1] << 8) |
(BufPtr[SizeField +2] << 16) |
(BufPtr[SizeField +3] << 24));
-
+
// Verify that Offset+Size fits in the file.
- if (Offset+Size > unsigned(BufEnd-BufPtr))
+ if (VerifyBufferSize && Offset+Size > unsigned(BufEnd-BufPtr))
return true;
BufPtr += Offset;
BufEnd = BufPtr+Size;
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