You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
170 lines
7.2 KiB
170 lines
7.2 KiB
//===-- internal_defs.h -----------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SCUDO_INTERNAL_DEFS_H_
|
|
#define SCUDO_INTERNAL_DEFS_H_
|
|
|
|
#include "platform.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifndef SCUDO_DEBUG
|
|
#define SCUDO_DEBUG 0
|
|
#endif
|
|
|
|
#define ARRAY_SIZE(A) (sizeof(A) / sizeof((A)[0]))
|
|
|
|
// String related macros.
|
|
|
|
#define STRINGIFY_(S) #S
|
|
#define STRINGIFY(S) STRINGIFY_(S)
|
|
#define CONCATENATE_(S, C) S##C
|
|
#define CONCATENATE(S, C) CONCATENATE_(S, C)
|
|
|
|
// Attributes & builtins related macros.
|
|
|
|
#define INTERFACE __attribute__((visibility("default")))
|
|
#define HIDDEN __attribute__((visibility("hidden")))
|
|
#define WEAK __attribute__((weak))
|
|
#define ALWAYS_INLINE inline __attribute__((always_inline))
|
|
#define ALIAS(X) __attribute__((alias(X)))
|
|
#define FORMAT(F, A) __attribute__((format(printf, F, A)))
|
|
#define NOINLINE __attribute__((noinline))
|
|
#define NORETURN __attribute__((noreturn))
|
|
#define LIKELY(X) __builtin_expect(!!(X), 1)
|
|
#define UNLIKELY(X) __builtin_expect(!!(X), 0)
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
// __builtin_prefetch(X) generates prefetchnt0 on x86
|
|
#define PREFETCH(X) __asm__("prefetchnta (%0)" : : "r"(X))
|
|
#else
|
|
#define PREFETCH(X) __builtin_prefetch(X)
|
|
#endif
|
|
#define UNUSED __attribute__((unused))
|
|
#define USED __attribute__((used))
|
|
#define NOEXCEPT noexcept
|
|
|
|
// This check is only available on Clang. This is essentially an alias of
|
|
// C++20's 'constinit' specifier which will take care of this when (if?) we can
|
|
// ask all libc's that use Scudo to compile us with C++20. Dynamic
|
|
// initialization is bad; Scudo is designed to be lazy-initializated on the
|
|
// first call to malloc/free (and friends), and this generally happens in the
|
|
// loader somewhere in libdl's init. After the loader is done, control is
|
|
// transferred to libc's initialization, and the dynamic initializers are run.
|
|
// If there's a dynamic initializer for Scudo, then it will clobber the
|
|
// already-initialized Scudo, and re-initialize all its members back to default
|
|
// values, causing various explosions. Unfortunately, marking
|
|
// scudo::Allocator<>'s constructor as 'constexpr' isn't sufficient to prevent
|
|
// dynamic initialization, as default initialization is fine under 'constexpr'
|
|
// (but not 'constinit'). Clang at -O0, and gcc at all opt levels will emit a
|
|
// dynamic initializer for any constant-initialized variables if there is a mix
|
|
// of default-initialized and constant-initialized variables.
|
|
//
|
|
// If you're looking at this because your build failed, you probably introduced
|
|
// a new member to scudo::Allocator<> (possibly transiently) that didn't have an
|
|
// initializer. The fix is easy - just add one.
|
|
#if defined(__has_attribute)
|
|
#if __has_attribute(require_constant_initialization)
|
|
#define SCUDO_REQUIRE_CONSTANT_INITIALIZATION \
|
|
__attribute__((__require_constant_initialization__))
|
|
#else
|
|
#define SCUDO_REQUIRE_CONSTANT_INITIALIZATION
|
|
#endif
|
|
#endif
|
|
|
|
namespace scudo {
|
|
|
|
typedef unsigned long uptr;
|
|
typedef unsigned char u8;
|
|
typedef unsigned short u16;
|
|
typedef unsigned int u32;
|
|
typedef unsigned long long u64;
|
|
typedef signed long sptr;
|
|
typedef signed char s8;
|
|
typedef signed short s16;
|
|
typedef signed int s32;
|
|
typedef signed long long s64;
|
|
|
|
// The following two functions have platform specific implementations.
|
|
void outputRaw(const char *Buffer);
|
|
void NORETURN die();
|
|
|
|
#define RAW_CHECK_MSG(Expr, Msg) \
|
|
do { \
|
|
if (UNLIKELY(!(Expr))) { \
|
|
outputRaw(Msg); \
|
|
die(); \
|
|
} \
|
|
} while (false)
|
|
|
|
#define RAW_CHECK(Expr) RAW_CHECK_MSG(Expr, #Expr)
|
|
|
|
void NORETURN reportCheckFailed(const char *File, int Line,
|
|
const char *Condition, u64 Value1, u64 Value2);
|
|
|
|
#define CHECK_IMPL(C1, Op, C2) \
|
|
do { \
|
|
scudo::u64 V1 = (scudo::u64)(C1); \
|
|
scudo::u64 V2 = (scudo::u64)(C2); \
|
|
if (UNLIKELY(!(V1 Op V2))) { \
|
|
scudo::reportCheckFailed(__FILE__, __LINE__, \
|
|
"(" #C1 ") " #Op " (" #C2 ")", V1, V2); \
|
|
scudo::die(); \
|
|
} \
|
|
} while (false)
|
|
|
|
#define CHECK(A) CHECK_IMPL((A), !=, 0)
|
|
#define CHECK_EQ(A, B) CHECK_IMPL((A), ==, (B))
|
|
#define CHECK_NE(A, B) CHECK_IMPL((A), !=, (B))
|
|
#define CHECK_LT(A, B) CHECK_IMPL((A), <, (B))
|
|
#define CHECK_LE(A, B) CHECK_IMPL((A), <=, (B))
|
|
#define CHECK_GT(A, B) CHECK_IMPL((A), >, (B))
|
|
#define CHECK_GE(A, B) CHECK_IMPL((A), >=, (B))
|
|
|
|
#if SCUDO_DEBUG
|
|
#define DCHECK(A) CHECK(A)
|
|
#define DCHECK_EQ(A, B) CHECK_EQ(A, B)
|
|
#define DCHECK_NE(A, B) CHECK_NE(A, B)
|
|
#define DCHECK_LT(A, B) CHECK_LT(A, B)
|
|
#define DCHECK_LE(A, B) CHECK_LE(A, B)
|
|
#define DCHECK_GT(A, B) CHECK_GT(A, B)
|
|
#define DCHECK_GE(A, B) CHECK_GE(A, B)
|
|
#else
|
|
#define DCHECK(A) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_EQ(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_NE(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_LT(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_LE(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_GT(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#define DCHECK_GE(A, B) \
|
|
do { \
|
|
} while (false)
|
|
#endif
|
|
|
|
// The superfluous die() call effectively makes this macro NORETURN.
|
|
#define UNREACHABLE(Msg) \
|
|
do { \
|
|
CHECK(0 && Msg); \
|
|
die(); \
|
|
} while (0)
|
|
|
|
} // namespace scudo
|
|
|
|
#endif // SCUDO_INTERNAL_DEFS_H_
|