mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 07:32:44 +00:00
460 lines
14 KiB
C++
460 lines
14 KiB
C++
//===-- sanitizer_internal_defs.h -------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer.
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// It contains macro used in run-time libraries code.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_DEFS_H
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#define SANITIZER_DEFS_H
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#include "sanitizer_platform.h"
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#ifndef SANITIZER_DEBUG
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# define SANITIZER_DEBUG 0
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#endif
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#define SANITIZER_STRINGIFY_(S) #S
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#define SANITIZER_STRINGIFY(S) SANITIZER_STRINGIFY_(S)
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// Only use SANITIZER_*ATTRIBUTE* before the function return type!
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#if SANITIZER_WINDOWS
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#if SANITIZER_IMPORT_INTERFACE
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# define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllimport)
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#else
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# define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllexport)
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#endif
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# define SANITIZER_WEAK_ATTRIBUTE
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#elif SANITIZER_GO
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# define SANITIZER_INTERFACE_ATTRIBUTE
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# define SANITIZER_WEAK_ATTRIBUTE
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#else
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# define SANITIZER_INTERFACE_ATTRIBUTE __attribute__((visibility("default")))
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# define SANITIZER_WEAK_ATTRIBUTE __attribute__((weak))
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#endif
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// TLS is handled differently on different platforms
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#if SANITIZER_LINUX || SANITIZER_NETBSD || \
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SANITIZER_FREEBSD || SANITIZER_OPENBSD
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# define SANITIZER_TLS_INITIAL_EXEC_ATTRIBUTE \
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__attribute__((tls_model("initial-exec"))) thread_local
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#else
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# define SANITIZER_TLS_INITIAL_EXEC_ATTRIBUTE
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#endif
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//--------------------------- WEAK FUNCTIONS ---------------------------------//
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// When working with weak functions, to simplify the code and make it more
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// portable, when possible define a default implementation using this macro:
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//
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// SANITIZER_INTERFACE_WEAK_DEF(<return_type>, <name>, <parameter list>)
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//
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// For example:
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// SANITIZER_INTERFACE_WEAK_DEF(bool, compare, int a, int b) { return a > b; }
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//
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#if SANITIZER_WINDOWS
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#include "sanitizer_win_defs.h"
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# define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...) \
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WIN_WEAK_EXPORT_DEF(ReturnType, Name, __VA_ARGS__)
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#else
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# define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...) \
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extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE \
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ReturnType Name(__VA_ARGS__)
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#endif
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// SANITIZER_SUPPORTS_WEAK_HOOKS means that we support real weak functions that
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// will evaluate to a null pointer when not defined.
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#ifndef SANITIZER_SUPPORTS_WEAK_HOOKS
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#if (SANITIZER_LINUX || SANITIZER_SOLARIS) && !SANITIZER_GO
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# define SANITIZER_SUPPORTS_WEAK_HOOKS 1
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// Before Xcode 4.5, the Darwin linker doesn't reliably support undefined
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// weak symbols. Mac OS X 10.9/Darwin 13 is the first release only supported
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// by Xcode >= 4.5.
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#elif SANITIZER_MAC && \
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__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1090 && !SANITIZER_GO
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# define SANITIZER_SUPPORTS_WEAK_HOOKS 1
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#else
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# define SANITIZER_SUPPORTS_WEAK_HOOKS 0
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#endif
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#endif // SANITIZER_SUPPORTS_WEAK_HOOKS
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// For some weak hooks that will be called very often and we want to avoid the
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// overhead of executing the default implementation when it is not necessary,
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// we can use the flag SANITIZER_SUPPORTS_WEAK_HOOKS to only define the default
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// implementation for platforms that doesn't support weak symbols. For example:
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//
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// #if !SANITIZER_SUPPORT_WEAK_HOOKS
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// SANITIZER_INTERFACE_WEAK_DEF(bool, compare_hook, int a, int b) {
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// return a > b;
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// }
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// #endif
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//
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// And then use it as: if (compare_hook) compare_hook(a, b);
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//----------------------------------------------------------------------------//
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// We can use .preinit_array section on Linux to call sanitizer initialization
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// functions very early in the process startup (unless PIC macro is defined).
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//
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// On FreeBSD, .preinit_array functions are called with rtld_bind_lock writer
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// lock held. It will lead to dead lock if unresolved PLT functions (which helds
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// rtld_bind_lock reader lock) are called inside .preinit_array functions.
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//
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// FIXME: do we have anything like this on Mac?
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#ifndef SANITIZER_CAN_USE_PREINIT_ARRAY
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#if ((SANITIZER_LINUX && !SANITIZER_ANDROID) || SANITIZER_OPENBSD || \
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SANITIZER_FUCHSIA || SANITIZER_NETBSD) && !defined(PIC)
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#define SANITIZER_CAN_USE_PREINIT_ARRAY 1
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// Before Solaris 11.4, .preinit_array is fully supported only with GNU ld.
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// FIXME: Check for those conditions.
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#elif SANITIZER_SOLARIS && !defined(PIC)
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# define SANITIZER_CAN_USE_PREINIT_ARRAY 1
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#else
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# define SANITIZER_CAN_USE_PREINIT_ARRAY 0
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#endif
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#endif // SANITIZER_CAN_USE_PREINIT_ARRAY
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// GCC does not understand __has_feature
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#if !defined(__has_feature)
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# define __has_feature(x) 0
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#endif
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// Older GCCs do not understand __has_attribute.
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#if !defined(__has_attribute)
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# define __has_attribute(x) 0
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#endif
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// For portability reasons we do not include stddef.h, stdint.h or any other
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// system header, but we do need some basic types that are not defined
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// in a portable way by the language itself.
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namespace __sanitizer {
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#if defined(_WIN64)
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// 64-bit Windows uses LLP64 data model.
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typedef unsigned long long uptr;
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typedef signed long long sptr;
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#else
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typedef unsigned long uptr;
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typedef signed long sptr;
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#endif // defined(_WIN64)
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#if defined(__x86_64__)
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// Since x32 uses ILP32 data model in 64-bit hardware mode, we must use
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// 64-bit pointer to unwind stack frame.
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typedef unsigned long long uhwptr;
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#else
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typedef uptr uhwptr;
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#endif
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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typedef unsigned long long u64;
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typedef signed char s8;
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typedef signed short s16;
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typedef signed int s32;
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typedef signed long long s64;
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#if SANITIZER_WINDOWS
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// On Windows, files are HANDLE, which is a synonim of void*.
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// Use void* to avoid including <windows.h> everywhere.
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typedef void* fd_t;
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typedef unsigned error_t;
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#else
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typedef int fd_t;
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typedef int error_t;
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#endif
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#if SANITIZER_SOLARIS && !defined(_LP64)
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typedef long pid_t;
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#else
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typedef int pid_t;
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#endif
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#if SANITIZER_FREEBSD || SANITIZER_NETBSD || \
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SANITIZER_OPENBSD || SANITIZER_MAC || \
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(SANITIZER_SOLARIS && (defined(_LP64) || _FILE_OFFSET_BITS == 64)) || \
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(SANITIZER_LINUX && defined(__x86_64__))
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typedef u64 OFF_T;
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#else
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typedef uptr OFF_T;
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#endif
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typedef u64 OFF64_T;
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#if (SANITIZER_WORDSIZE == 64) || SANITIZER_MAC
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typedef uptr operator_new_size_type;
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#else
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# if SANITIZER_OPENBSD || defined(__s390__) && !defined(__s390x__)
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// Special case: 31-bit s390 has unsigned long as size_t.
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typedef unsigned long operator_new_size_type;
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# else
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typedef u32 operator_new_size_type;
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# endif
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#endif
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typedef u64 tid_t;
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// ----------- ATTENTION -------------
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// This header should NOT include any other headers to avoid portability issues.
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// Common defs.
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#ifndef INLINE
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#define INLINE inline
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#endif
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#define INTERFACE_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
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#define SANITIZER_WEAK_DEFAULT_IMPL \
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extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
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#define SANITIZER_WEAK_CXX_DEFAULT_IMPL \
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extern "C++" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
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// Platform-specific defs.
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#if defined(_MSC_VER)
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# define ALWAYS_INLINE __forceinline
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// FIXME(timurrrr): do we need this on Windows?
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# define ALIAS(x)
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# define ALIGNED(x) __declspec(align(x))
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# define FORMAT(f, a)
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# define NOINLINE __declspec(noinline)
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# define NORETURN __declspec(noreturn)
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# define THREADLOCAL __declspec(thread)
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# define LIKELY(x) (x)
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# define UNLIKELY(x) (x)
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# define PREFETCH(x) /* _mm_prefetch(x, _MM_HINT_NTA) */ (void)0
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# define WARN_UNUSED_RESULT
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#else // _MSC_VER
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# define ALWAYS_INLINE inline __attribute__((always_inline))
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# define ALIAS(x) __attribute__((alias(x)))
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// Please only use the ALIGNED macro before the type.
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// Using ALIGNED after the variable declaration is not portable!
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# define ALIGNED(x) __attribute__((aligned(x)))
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# define FORMAT(f, a) __attribute__((format(printf, f, a)))
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# define NOINLINE __attribute__((noinline))
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# define NORETURN __attribute__((noreturn))
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# define THREADLOCAL __thread
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# define LIKELY(x) __builtin_expect(!!(x), 1)
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# define UNLIKELY(x) __builtin_expect(!!(x), 0)
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# if defined(__i386__) || defined(__x86_64__)
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// __builtin_prefetch(x) generates prefetchnt0 on x86
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# define PREFETCH(x) __asm__("prefetchnta (%0)" : : "r" (x))
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# else
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# define PREFETCH(x) __builtin_prefetch(x)
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# endif
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# define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#endif // _MSC_VER
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#if !defined(_MSC_VER) || defined(__clang__)
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# define UNUSED __attribute__((unused))
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# define USED __attribute__((used))
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#else
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# define UNUSED
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# define USED
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#endif
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#if !defined(_MSC_VER) || defined(__clang__) || MSC_PREREQ(1900)
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# define NOEXCEPT noexcept
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#else
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# define NOEXCEPT throw()
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#endif
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// Unaligned versions of basic types.
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typedef ALIGNED(1) u16 uu16;
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typedef ALIGNED(1) u32 uu32;
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typedef ALIGNED(1) u64 uu64;
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typedef ALIGNED(1) s16 us16;
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typedef ALIGNED(1) s32 us32;
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typedef ALIGNED(1) s64 us64;
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#if SANITIZER_WINDOWS
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} // namespace __sanitizer
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typedef unsigned long DWORD;
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namespace __sanitizer {
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typedef DWORD thread_return_t;
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# define THREAD_CALLING_CONV __stdcall
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#else // _WIN32
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typedef void* thread_return_t;
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# define THREAD_CALLING_CONV
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#endif // _WIN32
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typedef thread_return_t (THREAD_CALLING_CONV *thread_callback_t)(void* arg);
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// NOTE: Functions below must be defined in each run-time.
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void NORETURN Die();
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void NORETURN CheckFailed(const char *file, int line, const char *cond,
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u64 v1, u64 v2);
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// Check macro
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#define RAW_CHECK_MSG(expr, msg) do { \
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if (UNLIKELY(!(expr))) { \
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RawWrite(msg); \
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Die(); \
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} \
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} while (0)
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#define RAW_CHECK(expr) RAW_CHECK_MSG(expr, #expr)
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#define CHECK_IMPL(c1, op, c2) \
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do { \
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__sanitizer::u64 v1 = (__sanitizer::u64)(c1); \
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__sanitizer::u64 v2 = (__sanitizer::u64)(c2); \
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if (UNLIKELY(!(v1 op v2))) \
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__sanitizer::CheckFailed(__FILE__, __LINE__, \
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"(" #c1 ") " #op " (" #c2 ")", v1, v2); \
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} while (false) \
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/**/
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#define CHECK(a) CHECK_IMPL((a), !=, 0)
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#define CHECK_EQ(a, b) CHECK_IMPL((a), ==, (b))
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#define CHECK_NE(a, b) CHECK_IMPL((a), !=, (b))
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#define CHECK_LT(a, b) CHECK_IMPL((a), <, (b))
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#define CHECK_LE(a, b) CHECK_IMPL((a), <=, (b))
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#define CHECK_GT(a, b) CHECK_IMPL((a), >, (b))
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#define CHECK_GE(a, b) CHECK_IMPL((a), >=, (b))
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#if SANITIZER_DEBUG
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#define DCHECK(a) CHECK(a)
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#define DCHECK_EQ(a, b) CHECK_EQ(a, b)
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#define DCHECK_NE(a, b) CHECK_NE(a, b)
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#define DCHECK_LT(a, b) CHECK_LT(a, b)
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#define DCHECK_LE(a, b) CHECK_LE(a, b)
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#define DCHECK_GT(a, b) CHECK_GT(a, b)
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#define DCHECK_GE(a, b) CHECK_GE(a, b)
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#else
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#define DCHECK(a)
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#define DCHECK_EQ(a, b)
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#define DCHECK_NE(a, b)
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#define DCHECK_LT(a, b)
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#define DCHECK_LE(a, b)
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#define DCHECK_GT(a, b)
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#define DCHECK_GE(a, b)
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#endif
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#define UNREACHABLE(msg) do { \
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CHECK(0 && msg); \
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Die(); \
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} while (0)
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#define UNIMPLEMENTED() UNREACHABLE("unimplemented")
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#define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
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#define IMPL_PASTE(a, b) a##b
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#define IMPL_COMPILER_ASSERT(pred, line) \
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typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1]
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// Limits for integral types. We have to redefine it in case we don't
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// have stdint.h (like in Visual Studio 9).
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#undef __INT64_C
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#undef __UINT64_C
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#if SANITIZER_WORDSIZE == 64
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# define __INT64_C(c) c ## L
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# define __UINT64_C(c) c ## UL
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#else
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# define __INT64_C(c) c ## LL
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# define __UINT64_C(c) c ## ULL
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#endif // SANITIZER_WORDSIZE == 64
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#undef INT32_MIN
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#define INT32_MIN (-2147483647-1)
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#undef INT32_MAX
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#define INT32_MAX (2147483647)
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#undef UINT32_MAX
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#define UINT32_MAX (4294967295U)
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#undef INT64_MIN
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#define INT64_MIN (-__INT64_C(9223372036854775807)-1)
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#undef INT64_MAX
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#define INT64_MAX (__INT64_C(9223372036854775807))
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#undef UINT64_MAX
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#define UINT64_MAX (__UINT64_C(18446744073709551615))
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#undef UINTPTR_MAX
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#if SANITIZER_WORDSIZE == 64
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# define UINTPTR_MAX (18446744073709551615UL)
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#else
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# define UINTPTR_MAX (4294967295U)
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#endif // SANITIZER_WORDSIZE == 64
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enum LinkerInitialized { LINKER_INITIALIZED = 0 };
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#if !defined(_MSC_VER) || defined(__clang__)
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#if SANITIZER_S390_31
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#define GET_CALLER_PC() \
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(__sanitizer::uptr) __builtin_extract_return_addr(__builtin_return_address(0))
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#else
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#define GET_CALLER_PC() (__sanitizer::uptr) __builtin_return_address(0)
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#endif
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#define GET_CURRENT_FRAME() (__sanitizer::uptr) __builtin_frame_address(0)
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inline void Trap() {
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__builtin_trap();
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}
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#else
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extern "C" void* _ReturnAddress(void);
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extern "C" void* _AddressOfReturnAddress(void);
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# pragma intrinsic(_ReturnAddress)
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# pragma intrinsic(_AddressOfReturnAddress)
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#define GET_CALLER_PC() (__sanitizer::uptr) _ReturnAddress()
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// CaptureStackBackTrace doesn't need to know BP on Windows.
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#define GET_CURRENT_FRAME() \
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(((__sanitizer::uptr)_AddressOfReturnAddress()) + sizeof(__sanitizer::uptr))
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extern "C" void __ud2(void);
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# pragma intrinsic(__ud2)
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inline void Trap() {
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__ud2();
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}
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#endif
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#define HANDLE_EINTR(res, f) \
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{ \
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int rverrno; \
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do { \
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res = (f); \
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} while (internal_iserror(res, &rverrno) && rverrno == EINTR); \
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}
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// Forces the compiler to generate a frame pointer in the function.
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#define ENABLE_FRAME_POINTER \
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do { \
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volatile __sanitizer::uptr enable_fp; \
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enable_fp = GET_CURRENT_FRAME(); \
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(void)enable_fp; \
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} while (0)
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} // namespace __sanitizer
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namespace __asan {
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using namespace __sanitizer;
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}
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namespace __dsan {
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using namespace __sanitizer;
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}
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namespace __dfsan {
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using namespace __sanitizer;
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}
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namespace __lsan {
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using namespace __sanitizer;
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}
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namespace __msan {
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using namespace __sanitizer;
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}
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namespace __hwasan {
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using namespace __sanitizer;
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}
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namespace __tsan {
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using namespace __sanitizer;
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}
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namespace __scudo {
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using namespace __sanitizer;
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}
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namespace __ubsan {
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using namespace __sanitizer;
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}
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namespace __xray {
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using namespace __sanitizer;
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}
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namespace __interception {
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using namespace __sanitizer;
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}
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namespace __hwasan {
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using namespace __sanitizer;
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}
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#endif // SANITIZER_DEFS_H
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