Bug 1373663 - Establish non-oom precondition for patching. r=luke

--HG-- extra : rebase_source : af62b9d5264a6ea5458818167eb3c4ef4f8edf4a
dothq · Jun 21, 2017 · e111b5c · e111b5c
1 parent 3085458
commit e111b5c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/js/src/wasm/WasmBaselineCompile.cpp b/js/src/wasm/WasmBaselineCompile.cpp
@@ -2341,6 +2341,10 @@ class BaseCompiler
         // frame size. Flush the constant pool in case it needs to be patched.
         MOZ_ASSERT(maxFramePushed_ >= localSize_);
         masm.flush();
+
+        // Precondition for patching.
+        if (masm.oom())
+            return false;
         masm.patchAdd32ToPtr(stackAddOffset_, Imm32(-int32_t(maxFramePushed_ - localSize_)));
 
         // Since we just overflowed the stack, to be on the safe side, pop the