1 files changed, 57 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 0000000000..ac0fd14bd1
--- /dev/null
+++ b/js/src/jit/mips32/Bailouts-mips32.cpp
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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 "jit/JitFrames.h"
+#include "jit/JitRuntime.h"
+#include "jit/ScriptFromCalleeToken.h"
+#include "vm/JSContext.h"
+#include "vm/Realm.h"
+
+#include "vm/JSScript-inl.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();
+  TrampolinePtr code = rt->jitRuntime()->getBailoutTable(bailout->frameClass());
+#ifdef DEBUG
+  uint32_t tableSize =
+      rt->jitRuntime()->getBailoutTableSize(bailout->frameClass());
+#endif
+  uintptr_t tableOffset = bailout->tableOffset();
+  uintptr_t tableStart = reinterpret_cast<uintptr_t>(code.value);
+
+  MOZ_ASSERT(tableOffset >= tableStart && tableOffset < tableStart + tableSize);
+  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);
+}