Add m-esr52 at 52.6.0

1 files changed, 48 insertions, 0 deletions

diff --git a/js/src/jit/mips32/Bailouts-mips32.cpp b/js/src/jit/mips32/Bailouts-mips32.cpp
new file mode 100644
index 000000000..1b92d729c
--- /dev/null
+++ b/js/src/jit/mips32/Bailouts-mips32.cpp
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jit/mips32/Bailouts-mips32.h"
+
+#include "jscntxt.h"
+#include "jscompartment.h"
+
+using namespace js;
+using namespace js::jit;
+
+BailoutFrameInfo::BailoutFrameInfo(const JitActivationIterator& activations,
+                                   BailoutStack* bailout)
+  : machine_(bailout->machine())
+{
+    uint8_t* sp = bailout->parentStackPointer();
+    framePointer_ = sp + bailout->frameSize();
+    topFrameSize_ = framePointer_ - sp;
+
+    JSScript* script = ScriptFromCalleeToken(((JitFrameLayout*) framePointer_)->calleeToken());
+    JitActivation* activation = activations.activation()->asJit();
+    topIonScript_ = script->ionScript();
+
+    attachOnJitActivation(activations);
+
+    if (bailout->frameClass() == FrameSizeClass::None()) {
+        snapshotOffset_ = bailout->snapshotOffset();
+        return;
+    }
+
+    // Compute the snapshot offset from the bailout ID.
+    JSRuntime* rt = activation->compartment()->runtimeFromMainThread();
+    JitCode* code = rt->jitRuntime()->getBailoutTable(bailout->frameClass());
+    uintptr_t tableOffset = bailout->tableOffset();
+    uintptr_t tableStart = reinterpret_cast<uintptr_t>(code->raw());
+
+    MOZ_ASSERT(tableOffset >= tableStart &&
+               tableOffset < tableStart + code->instructionsSize());
+    MOZ_ASSERT((tableOffset - tableStart) % BAILOUT_TABLE_ENTRY_SIZE == 0);
+
+    uint32_t bailoutId = ((tableOffset - tableStart) / BAILOUT_TABLE_ENTRY_SIZE) - 1;
+    MOZ_ASSERT(bailoutId < BAILOUT_TABLE_SIZE);
+
+    snapshotOffset_ = topIonScript_->bailoutToSnapshot(bailoutId);
+}