Zachary Anderson
103881d01c
i.e. #ifndef VM_WHATEVER -> #ifndef RUNTIME_VM_WHATEVER This lets us remove a hack from the PRESUBMIT.py script that existed for reasons that are no longer valid, and sets us up to add some presubmit checks for the GN build. R=asiva@google.com, rmacnak@google.com Review URL: https://codereview.chromium.org/2450713004 .
136 lines
4.9 KiB
C++
136 lines
4.9 KiB
C++
// Copyright (c) 2012, 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_GLOBALS_H_
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#define RUNTIME_VM_GLOBALS_H_
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// This file contains global definitions for the VM library only. Anything that
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// is more globally useful should be added to 'vm/globals.h'.
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#include "platform/globals.h"
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#if defined(_WIN32)
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// Undef conflicting defines.
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#undef PARITY_EVEN
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#undef PARITY_ODD
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#undef near
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#endif // defined(_WIN32)
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// The following #defines are invalidated.
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#undef OVERFLOW // From math.h conflicts in constants_ia32.h
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namespace dart {
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// Smi value range is from -(2^N) to (2^N)-1.
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// N=30 (32-bit build) or N=62 (64-bit build).
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const intptr_t kSmiBits = kBitsPerWord - 2;
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const intptr_t kSmiMax = (static_cast<intptr_t>(1) << kSmiBits) - 1;
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const intptr_t kSmiMin = -(static_cast<intptr_t>(1) << kSmiBits);
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// Hard coded from above but for 32-bit architectures.
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const intptr_t kSmiBits32 = kBitsPerInt32 - 2;
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const intptr_t kSmiMax32 = (static_cast<intptr_t>(1) << kSmiBits32) - 1;
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const intptr_t kSmiMin32 = -(static_cast<intptr_t>(1) << kSmiBits32);
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#define kPosInfinity bit_cast<double>(DART_UINT64_C(0x7ff0000000000000))
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#define kNegInfinity bit_cast<double>(DART_UINT64_C(0xfff0000000000000))
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// The expression ARRAY_SIZE(array) is a compile-time constant of type
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// size_t which represents the number of elements of the given
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// array. You should only use ARRAY_SIZE on statically allocated
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// arrays.
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#define ARRAY_SIZE(array) \
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((sizeof(array) / sizeof(*(array))) / \
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static_cast<intptr_t>(!(sizeof(array) % sizeof(*(array)))))
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// The expression OFFSET_OF(type, field) computes the byte-offset of
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// the specified field relative to the containing type.
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//
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// The expression OFFSET_OF_RETURNED_VALUE(type, accessor) computes the
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// byte-offset of the return value of the accessor to the containing type.
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//
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// None of these use 0 or NULL, which causes a problem with the compiler
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// warnings we have enabled (which is also why 'offsetof' doesn't seem to work).
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// The workaround is to use the non-zero value kOffsetOfPtr.
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const intptr_t kOffsetOfPtr = 32;
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#define OFFSET_OF(type, field) \
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(reinterpret_cast<intptr_t>(&(reinterpret_cast<type*>(kOffsetOfPtr)->field)) \
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- kOffsetOfPtr)
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#define OFFSET_OF_RETURNED_VALUE(type, accessor) \
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(reinterpret_cast<intptr_t>( \
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(reinterpret_cast<type*>(kOffsetOfPtr)->accessor())) - kOffsetOfPtr)
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#define OPEN_ARRAY_START(type, align) \
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do { \
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const uword result = reinterpret_cast<uword>(this) + sizeof(*this); \
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ASSERT(Utils::IsAligned(result, sizeof(align))); \
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return reinterpret_cast<type*>(result); \
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} while (0)
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// A type large enough to contain the value of the C++ vtable. This is needed
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// to support the handle operations.
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typedef uword cpp_vtable;
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// When using GCC we can use GCC attributes to ensure that certain
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// contants are 8 or 16 byte aligned.
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#if defined(TARGET_OS_WINDOWS)
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#define ALIGN8 __declspec(align(8))
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#define ALIGN16 __declspec(align(16))
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#else
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#define ALIGN8 __attribute__((aligned(8)))
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#define ALIGN16 __attribute__((aligned(16)))
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#endif
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// Zap value used to indicate uninitialized handle area (debug purposes).
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#if defined(ARCH_IS_32_BIT)
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static const uword kZapUninitializedWord = 0xabababab;
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#else
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static const uword kZapUninitializedWord = 0xabababababababab;
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#endif
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// Macros to get the contents of the fp register.
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#if defined(TARGET_OS_WINDOWS)
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#if defined(HOST_ARCH_IA32)
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#define COPY_FP_REGISTER(fp) __asm { mov fp, ebp }; // NOLINT
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#elif defined(HOST_ARCH_X64)
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#define COPY_FP_REGISTER(fp) UNIMPLEMENTED();
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#else
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#error Unknown host architecture.
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#endif
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#else // !defined(TARGET_OS_WINDOWS))
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// Assume GCC-like inline syntax is valid.
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#if defined(HOST_ARCH_IA32)
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#define COPY_FP_REGISTER(fp) asm volatile ("movl %%ebp, %0" : "=r" (fp) );
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#elif defined(HOST_ARCH_X64)
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#define COPY_FP_REGISTER(fp) asm volatile ("movq %%rbp, %0" : "=r" (fp) );
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#elif defined(HOST_ARCH_ARM)
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# if defined(TARGET_OS_MAC)
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#define COPY_FP_REGISTER(fp) asm volatile ("mov %0, r7" : "=r" (fp) );
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# else
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#define COPY_FP_REGISTER(fp) asm volatile ("mov %0, r11" : "=r" (fp) );
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# endif
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#elif defined(HOST_ARCH_ARM64)
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#define COPY_FP_REGISTER(fp) asm volatile ("mov %0, x29" : "=r" (fp) );
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#elif defined(HOST_ARCH_MIPS)
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#define COPY_FP_REGISTER(fp) asm volatile ("move %0, $fp" : "=r" (fp) );
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#else
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#error Unknown host architecture.
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#endif
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#endif // !defined(TARGET_OS_WINDOWS))
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} // namespace dart
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#endif // RUNTIME_VM_GLOBALS_H_
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