Martin Kustermann
660cf26dbb
This is the next step towards preventing compiler from directly peeking into runtime and instead interact with runtime through a well defined surface. This CL decouples the hand-written stub codes from the runtime. The target architecture dependent stubs are moved to dart::compiler::StubCodeCompiler which use dart::compiler::target:* for accessing any runtime related code. The generation of type testing stubs is moved to separate files for the time being. Issue https://github.com/dart-lang/sdk/issues/31709 Change-Id: Icd0995b18a7bac496b1e12231cf437943f5c94f1 Reviewed-on: https://dart-review.googlesource.com/c/92720 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com> Auto-Submit: Martin Kustermann <kustermann@google.com>
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_FRAME_LAYOUT_H_
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#define RUNTIME_VM_FRAME_LAYOUT_H_
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// FrameLayout structure captures configuration specific properties of the
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// frame layout used by the runtime system and compiler.
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//
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// Runtime system uses runtime_frame_layout defined in stack_frame.h.
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// Compiler uses compiler::target::frame_layout defined in runtime_api.h
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namespace dart {
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// Forward declarations.
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class LocalVariable;
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struct FrameLayout {
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// The offset (in words) from FP to the first object.
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int first_object_from_fp;
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// The offset (in words) from FP to the last fixed object.
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int last_fixed_object_from_fp;
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// The offset (in words) from FP to the first local.
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int param_end_from_fp;
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// The offset (in words) from FP to the first local.
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int first_local_from_fp;
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// The fixed size of the frame.
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int dart_fixed_frame_size;
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// The offset (in words) from FP to the saved pool (if applicable).
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int saved_caller_pp_from_fp;
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// The offset (in words) from FP to the code object (if applicable).
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int code_from_fp;
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// Entry and exit frame layout.
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int exit_link_slot_from_entry_fp;
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// The number of fixed slots below the saved PC.
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int saved_below_pc() const { return -first_local_from_fp; }
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// Returns the FP-relative index where [variable] can be found (assumes
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// [variable] is not captured), in words.
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int FrameSlotForVariable(const LocalVariable* variable) const;
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// Returns the FP-relative index where [variable_index] can be found (assumes
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// [variable_index] comes from a [LocalVariable::index()], which is not
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// captured).
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int FrameSlotForVariableIndex(int index) const;
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// Returns the variable index from a FP-relative index.
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intptr_t VariableIndexForFrameSlot(intptr_t frame_slot) const {
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if (frame_slot <= first_local_from_fp) {
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return frame_slot - first_local_from_fp;
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} else {
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ASSERT(frame_slot > param_end_from_fp);
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return frame_slot - param_end_from_fp;
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}
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}
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// Called to initialize the stack frame layout during startup.
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static void Init();
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};
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} // namespace dart
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#endif // RUNTIME_VM_FRAME_LAYOUT_H_
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