[WebAssembly][lld] Fix crash when applying relocations to debug sections

Debug sections are special in that they can contain relocations against
symbols that are not present in the final output (i.e. not live).
However it is also possible to have R_WASM_TABLE_INDEX relocations
against symbols that don't have a table index assigned (since they are
not address taken by actual code.

Fixes: https://github.com/emscripten-core/emscripten/issues/9023
Differential Revision: https://reviews.llvm.org/D66435

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@369423 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MCParser/WasmAsmParser.cpp b/lib/MC/MCParser/WasmAsmParser.cpp
index 28d4459fecd4498a02cb56bb054bade628ecc606..0c242aed706d1be1d85e888c717f6c791c5c1dea 100644 (file)
--- a/lib/MC/MCParser/WasmAsmParser.cpp
+++ b/lib/MC/MCParser/WasmAsmParser.cpp
@@ -123,6 +123,7 @@ public:
                     // See use of .init_array in WasmObjectWriter and
                     // TargetLoweringObjectFileWasm
                     .StartsWith(".init_array", SectionKind::getData())
+                    .StartsWith(".debug_", SectionKind::getMetadata())
                     .Default(Optional<SectionKind>());
     if (!Kind.hasValue())
       return Parser->Error(Lexer->getLoc(), "unknown section kind: " + Name);