mirror of
https://github.com/dart-lang/sdk
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e5602b0652
Bring other architectures into agreement with arm about the order in which LoadObject should consider its options. TEST=ci Change-Id: I277e692020acc6581b3d19a87a85d95c8badd696 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/250322 Reviewed-by: Alexander Markov <alexmarkov@google.com> Reviewed-by: Siva Annamalai <asiva@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
214 lines
8.1 KiB
C++
214 lines
8.1 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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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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#if !defined(DART_COMPRESSED_POINTERS)
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const intptr_t kSmiBits = kBitsPerWord - 2;
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#else
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const intptr_t kSmiBits = 30;
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#endif
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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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#if defined(DART_COMPRESSED_POINTERS)
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static constexpr int kCompressedWordSize = kInt32Size;
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static constexpr int kCompressedWordSizeLog2 = kInt32SizeLog2;
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typedef uint32_t compressed_uword;
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typedef int32_t compressed_word;
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#else
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static constexpr int kCompressedWordSize = kWordSize;
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static constexpr int kCompressedWordSizeLog2 = kWordSizeLog2;
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typedef uintptr_t compressed_uword;
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typedef intptr_t compressed_word;
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#endif
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const int kMaxAddrSpaceMB = (kWordSize <= 4) ? 4096 : kMaxInt;
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// Number of bytes per BigInt digit.
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const intptr_t kBytesPerBigIntDigit = 4;
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// The default old gen heap size in MB, where 0 -- unlimited.
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// 32-bit: OS limit is 2 or 3 GB
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// 64-bit: Linux's limit is
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// sysctl vm.max_map_count (default 2^16) * 512 KB OldPages = 32 GB
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// Set the VM limit below the OS limit to increase the likelihood of failing
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// gracefully with a Dart OutOfMemory exception instead of SIGABORT.
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const intptr_t kDefaultMaxOldGenHeapSize = (kWordSize <= 4) ? 1536 : 30720;
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const intptr_t kDefaultNewGenSemiMaxSize = (kWordSize <= 4) ? 8 : 16;
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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))))) // NOLINT
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#if defined(PRODUCT) && defined(DEBUG)
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#error Both PRODUCT and DEBUG defined.
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#endif // defined(PRODUCT) && defined(DEBUG)
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#if defined(PRODUCT)
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#define NOT_IN_PRODUCT(code)
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#define ONLY_IN_PRODUCT(code) code
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#else // defined(PRODUCT)
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#define NOT_IN_PRODUCT(code) code
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#define ONLY_IN_PRODUCT(code)
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#endif // defined(PRODUCT)
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#if defined(DART_PRECOMPILED_RUNTIME) && defined(DART_PRECOMPILER)
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#error DART_PRECOMPILED_RUNTIME and DART_PRECOMPILER are mutually exclusive
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#endif // defined(DART_PRECOMPILED_RUNTIME) && defined(DART_PRECOMPILER)
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#if defined(DART_PRECOMPILED_RUNTIME) && defined(DART_NOSNAPSHOT)
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#error DART_PRECOMPILED_RUNTIME and DART_NOSNAPSHOT are mutually exclusive
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#endif // defined(DART_PRECOMPILED_RUNTIME) && defined(DART_NOSNAPSHOT)
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#if defined(DART_PRECOMPILED_RUNTIME)
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#define NOT_IN_PRECOMPILED(code)
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#define ONLY_IN_PRECOMPILED(code) code
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#else
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#define NOT_IN_PRECOMPILED(code) code
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#define ONLY_IN_PRECOMPILED(code)
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#endif // defined(DART_PRECOMPILED_RUNTIME)
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#if defined(TARGET_ARCH_IA32)
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#define NOT_IN_IA32(code)
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#else
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#define NOT_IN_IA32(code) code
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#endif
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#if defined(DART_PRECOMPILED_RUNTIME)
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#define NOT_IN_PRECOMPILED_RUNTIME(code)
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#else
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#define NOT_IN_PRECOMPILED_RUNTIME(code) code
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#endif // defined(DART_PRECOMPILED_RUNTIME)
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#if !defined(PRODUCT) || defined(DART_HOST_OS_FUCHSIA) || \
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defined(DART_TARGET_OS_FUCHSIA) || defined(DART_TARGET_OS_ANDROID)
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#define SUPPORT_TIMELINE 1
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#endif
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#if defined(ARCH_IS_64_BIT) && !defined(IS_SIMARM_HOST64)
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#define HASH_IN_OBJECT_HEADER 1
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#endif
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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>( \
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&(reinterpret_cast<type*>(kOffsetOfPtr)->field)) - \
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kOffsetOfPtr) // NOLINT
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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())) - \
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kOffsetOfPtr) // NOLINT
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#define SIZE_OF_RETURNED_VALUE(type, method) \
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sizeof(reinterpret_cast<type*>(kOffsetOfPtr)->method())
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#define SIZE_OF_DEREFERENCED_RETURNED_VALUE(type, method) \
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sizeof(*(reinterpret_cast<type*>(kOffsetOfPtr))->method())
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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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// constants are 8 or 16 byte aligned.
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#if defined(DART_HOST_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(DART_HOST_OS_WINDOWS)
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// clang-format off
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#if defined(HOST_ARCH_IA32)
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#define COPY_FP_REGISTER(fp) \
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__asm { mov fp, ebp} \
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; // NOLINT
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// clang-format on
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#else
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// Inline assembly is only available on x86; return the stack pointer instead.
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#define COPY_FP_REGISTER(fp) fp = OSThread::GetCurrentStackPointer();
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#endif
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#else // !defined(DART_HOST_OS_WINDOWS))
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// Assume GCC-compatible builtins.
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#define COPY_FP_REGISTER(fp) \
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fp = reinterpret_cast<uintptr_t>(__builtin_frame_address(0));
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#endif // !defined(DART_HOST_OS_WINDOWS))
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#if defined(TARGET_ARCH_ARM) || defined(TARGET_ARCH_ARM64) || \
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defined(TARGET_ARCH_X64) || defined(TARGET_ARCH_RISCV32) || \
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defined(TARGET_ARCH_RISCV64)
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#define TARGET_USES_OBJECT_POOL 1
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#endif
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#if defined(DART_PRECOMPILER) && \
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(defined(TARGET_ARCH_X64) || defined(TARGET_ARCH_ARM) || \
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defined(TARGET_ARCH_ARM64) || defined(TARGET_ARCH_RISCV32) || \
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defined(TARGET_ARCH_RISCV64))
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#define DART_SUPPORT_PRECOMPILATION 1
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#endif
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} // namespace dart
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#endif // RUNTIME_VM_GLOBALS_H_
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