[PATCH] D121349: [WebAssembly] Second phase of implementing extended const proposal.

Mon Mar 14 14:34:50 PDT 2022

saugustine added a comment.

This patch triggers a bunch of uninitialized memory under msan errors when running llvm-project/lld/test/wasm:data-layout.s (and several others) as below:

  exit status 2
  ==1915==WARNING: MemorySanitizer: use-of-uninitialized-value
      #0 0x55e0ff9ca683 in (anonymous namespace)::WasmDumper::dump() /llvm-project/llvm/tools/obj2yaml/wasm2yaml.cpp:374:13
      #1 0x55e0ff9c1b87 in wasm2yaml(llvm::raw_ostream&, llvm::object::WasmObjectFile const&) llvm-project/llvm/tools/obj2yaml/wasm2yaml.cpp:411:50
      #2 0x55e0ff9be3c9 in dumpObject llvm-project/llvm/tools/obj2yaml/obj2yaml.cpp:40:29
      #3 0x55e0ff9be3c9 in dumpInput llvm-project/llvm/tools/obj2yaml/obj2yaml.cpp:67:12
      #4 0x55e0ff9be3c9 in main llvm-project/llvm/tools/obj2yaml/obj2yaml.cpp:89:19
      #5 0x7f7a5befc8d2 in __libc_start_main (/usr/grte/v5/lib64/libc.so.6+0x628d2) (BuildId: 7cfed7708e5ab7fcb286b373de21ee76)
      #6 0x55e0ff798429 in _start /usr/grte/v5/debug-src/src/csu/../sysdeps/x86_64/start.S:120

  SUMMARY: MemorySanitizer: use-of-uninitialized-value llvm-project/llvm/tools/obj2yaml/wasm2yaml.cpp:374:13 in (anonymous namespace)::WasmDumper::dump()
  Exiting
  FileCheck error: '<stdin>' is empty.
  FileCheck command line:  llvm-project/llvm/FileCheck --allow-unused-prefixes llvm-project/lld/test/wasm/data-layout.s -check-prefix=CHECK-SHARED

Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D121349/new/

https://reviews.llvm.org/D121349