Bug 1370820: Allow disabling async stacks for the JS shell; r=jandem

MozReview-Commit-ID: 2mDd0r2PV2A

--HG--
extra : rebase_source : 718e836bab5420295a6220a3849f6c59b3934eb5
extra : histedit_source : 378dfb5a339ab93c8e1097a02fd6b6d110cfc6c9

js/src/shell/js.cpp

@@ -267,6 +267,7 @@ static bool enableNativeRegExp = false;
 static bool enableUnboxedArrays = false;
 static bool enableSharedMemory = SHARED_MEMORY_DEFAULT;
 static bool enableWasmAlwaysBaseline = false;
+static bool enableAsyncStacks = false;
 #ifdef JS_GC_ZEAL
 static uint32_t gZealBits = 0;
 static uint32_t gZealFrequency = 0;
@@ -7771,6 +7772,7 @@ SetContextOptions(JSContext* cx, const OptionParser& op)
     enableNativeRegExp = !op.getBoolOption("no-native-regexp");
     enableUnboxedArrays = op.getBoolOption("unboxed-arrays");
     enableWasmAlwaysBaseline = op.getBoolOption("wasm-always-baseline");
+    enableAsyncStacks = !op.getBoolOption("no-async-stacks");
 
     JS::ContextOptionsRef(cx).setBaseline(enableBaseline)
                              .setIon(enableIon)
@@ -7778,7 +7780,8 @@ SetContextOptions(JSContext* cx, const OptionParser& op)
                              .setWasm(enableWasm)
                              .setWasmAlwaysBaseline(enableWasmAlwaysBaseline)
                              .setNativeRegExp(enableNativeRegExp)
-                             .setUnboxedArrays(enableUnboxedArrays);
+                             .setUnboxedArrays(enableUnboxedArrays)
+                             .setAsyncStack(enableAsyncStacks);
 
     if (op.getBoolOption("wasm-check-bce"))
         jit::JitOptions.wasmAlwaysCheckBounds = true;
@@ -8379,6 +8382,7 @@ main(int argc, char** argv, char** envp)
         || !op.addStringOption('z', "gc-zeal", "LEVEL(;LEVEL)*[,N]", gc::ZealModeHelpText)
 #endif
         || !op.addStringOption('\0', "module-load-path", "DIR", "Set directory to load modules from")
+        || !op.addBoolOption('\0', "no-async-stacks", "Disable async stacks")
     )
     {
         return EXIT_FAILURE;