js/src/jit/Linker.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 jit_Linker_h
   8 #define jit_Linker_h
   9
  10 #include "mozilla/Maybe.h"
  11
  12 #include <stdint.h>
  13
  14 #include "jstypes.h"
  15
  16 #include "jit/AutoWritableJitCode.h"
  17 #include "jit/MacroAssembler.h"
  18 #include "vm/Runtime.h"
  19
  20 struct JS_PUBLIC_API JSContext;
  21
  22 namespace js {
  23 namespace jit {
  24
  25 class JitCode;
  26
  27 enum class CodeKind : uint8_t;
  28
  29 class Linker {
  30   MacroAssembler& masm;
  31   mozilla::Maybe<AutoWritableJitCodeFallible> awjcf;
  32
  33   JitCode* fail(JSContext* cx) {
  34     ReportOutOfMemory(cx);
  35     return nullptr;
  36   }
  37
  38  public:
  39   // Construct a linker with a rooted macro assembler.
  40   explicit Linker(MacroAssembler& masm) : masm(masm) { masm.finish(); }
  41
  42   // Create a new JitCode object and populate it with the contents of the
  43   // macro assember buffer.
  44   //
  45   // This method cannot GC. Errors are reported to the context.
  46   JitCode* newCode(JSContext* cx, CodeKind kind);
  47 };
  48
  49 }  // namespace jit
  50 }  // namespace js
  51
  52 #endif /* jit_Linker_h */