[compiler-rt] [msan] Mark allocator padding as uninitialized, with new origin tag (PR #157187)

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github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- compiler-rt/test/msan/allocator_padding.cpp compiler-rt/lib/msan/msan.h compiler-rt/lib/msan/msan_allocator.cpp compiler-rt/lib/msan/msan_report.cpp compiler-rt/test/msan/zero_alloc.cpp
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/compiler-rt/lib/msan/msan_report.cpp b/compiler-rt/lib/msan/msan_report.cpp
index 8fc18aace..cd0bf6723 100644
--- a/compiler-rt/lib/msan/msan_report.cpp
+++ b/compiler-rt/lib/msan/msan_report.cpp
@@ -91,9 +91,8 @@ static void DescribeOrigin(u32 id) {
                d.Default());
         break;
       case STACK_TRACE_TAG_ALLOC_PADDING:
-        Printf(
-            "  %sUninitialized value is outside of heap allocation%s\n",
-            d.Origin(), d.Default());
+        Printf("  %sUninitialized value is outside of heap allocation%s\n",
+               d.Origin(), d.Default());
         break;
       default:
         Printf("  %sUninitialized value was created%s\n", d.Origin(),

``````````

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https://github.com/llvm/llvm-project/pull/157187