js/src/vm/FrameIter-inl.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef vm_FrameIter_inl_h
   8 #define vm_FrameIter_inl_h
   9
  10 #include "vm/FrameIter.h"
  11
  12 #include "mozilla/Assertions.h"  // MOZ_ASSERT, MOZ_CRASH
  13
  14 #include "jit/JSJitFrameIter.h"  // js::jit::{InlineFrameIterator,MaybeReadFallback,ReadFrame_Actuals}
  15
  16 #include "vm/Stack-inl.h"  // js::InterpreterFrame::unaliasedForEachActual
  17
  18 namespace js {
  19
  20 template <class Op>
  21 inline void FrameIter::unaliasedForEachActual(JSContext* cx, Op op) {
  22   switch (data_.state_) {
  23     case DONE:
  24       break;
  25     case INTERP:
  26       interpFrame()->unaliasedForEachActual(op);
  27       return;
  28     case JIT:
  29       MOZ_ASSERT(isJSJit());
  30       if (jsJitFrame().isIonJS()) {
  31         jit::MaybeReadFallback recover(cx, activation()->asJit(),
  32                                        &jsJitFrame());
  33         ionInlineFrames_.unaliasedForEachActual(cx, op, recover);
  34       } else if (jsJitFrame().isBailoutJS()) {
  35         // :TODO: (Bug 1070962) If we are introspecting the frame which is
  36         // being bailed, then we might be in the middle of recovering
  37         // instructions. Stacking computeInstructionResults implies that we
  38         // might be recovering result twice. In the mean time, to avoid
  39         // that, we just return Undefined values for instruction results
  40         // which are not yet recovered.
  41         jit::MaybeReadFallback fallback;
  42         ionInlineFrames_.unaliasedForEachActual(cx, op, fallback);
  43       } else {
  44         MOZ_ASSERT(jsJitFrame().isBaselineJS());
  45         jsJitFrame().unaliasedForEachActual(op);
  46       }
  47       return;
  48   }
  49   MOZ_CRASH("Unexpected state");
  50 }
  51
  52 }  // namespace js
  53
  54 #endif  // vm_FrameIter_inl_h