Bug 1563889 - Use AutoEnterOOMUnsafeRegion in JitScript::ensureProfileString. r=djvj

Differential Revision: https://phabricator.services.mozilla.com/D38977

--HG--
extra : moz-landing-system : lando

js/src/jit-test/tests/profiler/bug1563889.js

@@ -0,0 +1,3 @@
+// |jit-test| skip-if: !('oomTest' in this)
+for (var i = 0; i < 20; i++) {}
+oomTest(enableGeckoProfiling);

js/src/jit/JitScript.cpp

@@ -204,9 +204,10 @@ void JitScript::ensureProfileString(JSContext* cx, JSScript* script) {
     return;
   }
 
+  AutoEnterOOMUnsafeRegion oomUnsafe;
   profileString_ = cx->runtime()->geckoProfiler().profileString(cx, script);
   if (!profileString_) {
-    MOZ_CRASH("Failed to allocate profile string");
+    oomUnsafe.crash("Failed to allocate profile string");
   }
 }