Bug 1371317: ARM simulator: don't assert when triggering a second interrupt; r=luke

MozReview-Commit-ID: CqmCkNFk93t

--HG--
extra : rebase_source : f6aada78431b547d8d7392d8b0adf70b493b423a
extra : histedit_source : 7f0b27e2a5621bc126a741157668d638ed8aac47

js/src/jit/arm/Simulator-arm.h

@@ -193,7 +193,9 @@ class Simulator
     T get_pc_as() const { return reinterpret_cast<T>(get_pc()); }
 
     void trigger_wasm_interrupt() {
-        MOZ_ASSERT(!wasm_interrupt_);
+        // This can be called several times if a single interrupt isn't caught
+        // and handled by the simulator, but this is fine; once the current
+        // instruction is done executing, the interrupt will be handled anyhow.
         wasm_interrupt_ = true;
     }