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Add support for reading unaligned bytecode buffers

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5819 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-04-19 21:45:17 +00:00
parent 14e8e29105
commit f6099df194
1 changed files with 11 additions and 0 deletions
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11
lib/Bytecode/Reader/Reader.cpp
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@ -639,8 +639,19 @@ Module *BytecodeParser::ParseBytecode(const uchar *Buf, const uchar *EndBuf) {
Module *ParseBytecodeBuffer(const unsigned char *Buffer, unsigned Length,
std::string *ErrorStr) {
BytecodeParser Parser;
unsigned char *PtrToDelete = 0;
if ((intptr_t)Buffer & 3) { // If the buffer is not 4 byte aligned...
// Allocate a new buffer to hold the bytecode...
PtrToDelete = new unsigned char[Length+4];
unsigned Offset = 4-((intptr_t)PtrToDelete & 3); // Make sure it's aligned
memcpy(PtrToDelete+Offset, Buffer, Length); // Copy it over
Buffer = PtrToDelete+Offset;
}
Module *R = Parser.ParseBytecode(Buffer, Buffer+Length);
if (ErrorStr) *ErrorStr = Parser.getError();
delete [] PtrToDelete; // Delete alignment buffer if neccesary
return R;
}