tree 7381ac4f00db30165cad69252a2b864534b28a8e
parent 5bb6fe119091ac7fc9ba12cd04af7b9b6c537a9e
author Steven Wu <stevenwu@apple.com> 1553202091 +0000
committer Steven Wu <stevenwu@apple.com> 1553202091 +0000

[Object] Fix reading objects created with -fembed-bitcode-marker

Currently, this fails with many tools, e.g.

$ clang -fembed-bitcode-marker -c -o test.o test.c
$ nm test.o
nm: test.o The file was not recognized as a valid object file

-fembed-bitcode-marker creates a LLVM,bitcode section consisting of a single
byte. When reading the object file, IRObjectFile::findBitcodeInObject succeeds,
causing SymbolicFile::createSymbolicFile to try to read the "bitcode" rather
than using the outer Mach-O data - when then fails.

Fix this by making findBitcodeInObject return an error if the section size <= 1.

Patched by: Nicholas Allegra

Differential Revision: https://reviews.llvm.org/D44373

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356718 91177308-0d34-0410-b5e6-96231b3b80d8