Author: Fangrui Song Date: 2020-12-20T20:01:20-08:00 New Revision: 791fe7ac57a9b660554219a99d63e07abfaa0982
URL: https://github.com/llvm/llvm-project/commit/791fe7ac57a9b660554219a99d63e07abfaa0982 DIFF: https://github.com/llvm/llvm-project/commit/791fe7ac57a9b660554219a99d63e07abfaa0982.diff LOG: [lld-macho] Fix memcpy ub after D93267 Added: Modified: lld/MachO/UnwindInfoSection.cpp Removed: ################################################################################ diff --git a/lld/MachO/UnwindInfoSection.cpp b/lld/MachO/UnwindInfoSection.cpp index acb4a9d69b79..b4c3a31f8565 100644 --- a/lld/MachO/UnwindInfoSection.cpp +++ b/lld/MachO/UnwindInfoSection.cpp @@ -318,8 +318,9 @@ void UnwindInfoSection::writeTo(uint8_t *buf) const { *ep++ = (it->second << COMPRESSED_ENTRY_FUNC_OFFSET_BITS) | (cuep->functionAddress - functionAddressBase); } - memcpy(ep, page.localEncodings.data(), - page.localEncodings.size() * sizeof(uint32_t)); + if (page.localEncodings.size() != 0) + memcpy(ep, page.localEncodings.data(), + page.localEncodings.size() * sizeof(uint32_t)); } else { auto *p2p = reinterpret_cast<unwind_info_regular_second_level_page_header *>(pp); _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
