diff options
| -rw-r--r-- | lld/COFF/PDB.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lld/COFF/PDB.cpp b/lld/COFF/PDB.cpp index 94af920d5e7a..8ca74ebc661e 100644 --- a/lld/COFF/PDB.cpp +++ b/lld/COFF/PDB.cpp @@ -950,7 +950,7 @@ void DebugSHandler::finish() { // must also be rewritten to use the PDB string table. for (const UnrelocatedFpoData &subsec : frameDataSubsecs) { // Relocate the first four bytes of the subection and reinterpret them as a - // 32 bit integer. + // 32 bit little-endian integer. SectionChunk *debugChunk = subsec.debugChunk; ArrayRef<uint8_t> subsecData = subsec.subsecData; uint32_t relocIndex = subsec.relocIndex; @@ -959,8 +959,9 @@ void DebugSHandler::finish() { debugChunk->writeAndRelocateSubsection(debugChunk->getContents(), unrelocatedRvaStart, relocIndex, &relocatedRvaStart[0]); - uint32_t rvaStart; - memcpy(&rvaStart, &relocatedRvaStart[0], sizeof(uint32_t)); + // Use of memcpy here avoids violating type-based aliasing rules. + support::ulittle32_t rvaStart; + memcpy(&rvaStart, &relocatedRvaStart[0], sizeof(support::ulittle32_t)); // Copy each frame data record, add in rvaStart, translate string table // indices, and add the record to the PDB. |