PPC/s390: Add a debug v8 API SetDetachedWindowReason

Port 63dc5556

Original Commit Message:

    A window is a Blink concept. This API marks the context as backing
    a detached window. This doesn't necessarily mean that the context is
    detached.

    Every time a JS function is called within a context that has a non-zero
    DetachedWindowReason, Runtime::kReportDetachedWindowAccess is invoked,
    which will report this call to Blink via a callback, which in turn can
    report number of such calls via UKM metrics.

R=bartekn@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I2243898115287e103ba5700499b9547fe155dceb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1919954Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#65018}

src/builtins/ppc/builtins-ppc.cc

@@ -2036,6 +2036,14 @@ void Builtins::Generate_CallFunction(MacroAssembler* masm,
           Operand(SharedFunctionInfo::IsStrictBit::kMask |
                   SharedFunctionInfo::IsNativeBit::kMask));
   __ bne(&done_convert, cr0);
+
+  // Check if the window is marked as detached.
+  Label detached_window, after_detached_window;
+  __ LoadNativeContextSlot(Context::DETACHED_WINDOW_REASON_INDEX, r6);
+  __ CmpSmiLiteral(r6, Smi::zero(), r0);
+  __ bne(&detached_window);
+  __ bind(&after_detached_window);
+
   {
     // ----------- S t a t e -------------
     //  -- r3 : the number of arguments (not including the receiver)
@@ -2109,6 +2117,15 @@ void Builtins::Generate_CallFunction(MacroAssembler* masm,
     __ push(r4);
     __ CallRuntime(Runtime::kThrowConstructorNonCallableError);
   }
+
+  __ bind(&detached_window);
+  {
+    FrameScope frame(masm, StackFrame::INTERNAL);
+    __ PushCallerSaved(kDontSaveFPRegs, r6);
+    __ CallRuntime(Runtime::kReportDetachedWindowAccess);
+    __ PopCallerSaved(kDontSaveFPRegs, r6);
+  }
+  __ jmp(&after_detached_window);
 }
 
 namespace {

src/builtins/s390/builtins-s390.cc

@@ -2094,6 +2094,14 @@ void Builtins::Generate_CallFunction(MacroAssembler* masm,
           Operand(SharedFunctionInfo::IsStrictBit::kMask |
                   SharedFunctionInfo::IsNativeBit::kMask));
   __ bne(&done_convert);
+
+  // Check if the window is marked as detached.
+  Label detached_window, after_detached_window;
+  __ LoadNativeContextSlot(Context::DETACHED_WINDOW_REASON_INDEX, r5);
+  __ CmpSmiLiteral(r5, Smi::zero(), r0);
+  __ bne(&detached_window);
+  __ bind(&after_detached_window);
+
   {
     // ----------- S t a t e -------------
     //  -- r2 : the number of arguments (not including the receiver)
@@ -2167,6 +2175,15 @@ void Builtins::Generate_CallFunction(MacroAssembler* masm,
     __ push(r3);
     __ CallRuntime(Runtime::kThrowConstructorNonCallableError);
   }
+
+  __ bind(&detached_window);
+  {
+    FrameScope frame(masm, StackFrame::INTERNAL);
+    __ PushCallerSaved(kDontSaveFPRegs, r5);
+    __ CallRuntime(Runtime::kReportDetachedWindowAccess);
+    __ PopCallerSaved(kDontSaveFPRegs, r5);
+  }
+  __ jmp(&after_detached_window);
 }
 
 namespace {