diff options
Diffstat (limited to 'vpx_ports')
| -rw-r--r-- | vpx_ports/compiler_attributes.h | 59 | ||||
| -rw-r--r-- | vpx_ports/mem.h | 30 | ||||
| -rw-r--r-- | vpx_ports/vpx_ports.mk | 1 |
3 files changed, 60 insertions, 30 deletions
diff --git a/vpx_ports/compiler_attributes.h b/vpx_ports/compiler_attributes.h new file mode 100644 index 000000000..354352016 --- /dev/null +++ b/vpx_ports/compiler_attributes.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2020 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef VPX_VPX_PORTS_COMPILER_ATTRIBUTES_H_ +#define VPX_VPX_PORTS_COMPILER_ATTRIBUTES_H_ + +#if !defined(__has_feature) +#define __has_feature(x) 0 +#endif // !defined(__has_feature) + +#if !defined(__has_attribute) +#define __has_attribute(x) 0 +#endif // !defined(__has_attribute) + +//------------------------------------------------------------------------------ +// Sanitizer attributes. + +#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) +#define VPX_WITH_ASAN 1 +#else +#define VPX_WITH_ASAN 0 +#endif // __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) + +#if defined(__clang__) && __has_attribute(no_sanitize) +#define VPX_NO_UNSIGNED_OVERFLOW_CHECK \ + __attribute__((no_sanitize("unsigned-integer-overflow"))) +#endif + +#ifndef VPX_NO_UNSIGNED_OVERFLOW_CHECK +#define VPX_NO_UNSIGNED_OVERFLOW_CHECK +#endif + +//------------------------------------------------------------------------------ +// Variable attributes. + +#if __has_attribute(uninitialized) +// Attribute "uninitialized" disables -ftrivial-auto-var-init=pattern for +// the specified variable. +// +// -ftrivial-auto-var-init is security risk mitigation feature, so attribute +// should not be used "just in case", but only to fix real performance +// bottlenecks when other approaches do not work. In general the compiler is +// quite effective at eliminating unneeded initializations introduced by the +// flag, e.g. when they are followed by actual initialization by a program. +// However if compiler optimization fails and code refactoring is hard, the +// attribute can be used as a workaround. +#define VPX_UNINITIALIZED __attribute__((uninitialized)) +#else +#define VPX_UNINITIALIZED +#endif // __has_attribute(uninitialized) + +#endif // VPX_VPX_PORTS_COMPILER_ATTRIBUTES_H_ diff --git a/vpx_ports/mem.h b/vpx_ports/mem.h index 4e9041304..5eccfe8f5 100644 --- a/vpx_ports/mem.h +++ b/vpx_ports/mem.h @@ -41,34 +41,4 @@ #define CAST_TO_BYTEPTR(x) ((uint8_t *)((uintptr_t)(x))) #endif // CONFIG_VP9_HIGHBITDEPTH -#if !defined(__has_feature) -#define __has_feature(x) 0 -#endif // !defined(__has_feature) - -#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) -#define VPX_WITH_ASAN 1 -#else -#define VPX_WITH_ASAN 0 -#endif // __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) - -#if !defined(__has_attribute) -#define __has_attribute(x) 0 -#endif // !defined(__has_attribute) - -#if __has_attribute(uninitialized) -// Attribute "uninitialized" disables -ftrivial-auto-var-init=pattern for -// the specified variable. -// -// -ftrivial-auto-var-init is security risk mitigation feature, so attribute -// should not be used "just in case", but only to fix real performance -// bottlenecks when other approaches do not work. In general the compiler is -// quite effective at eliminating unneeded initializations introduced by the -// flag, e.g. when they are followed by actual initialization by a program. -// However if compiler optimization fails and code refactoring is hard, the -// attribute can be used as a workaround. -#define VPX_UNINITIALIZED __attribute__((uninitialized)) -#else -#define VPX_UNINITIALIZED -#endif // __has_attribute(uninitialized) - #endif // VPX_VPX_PORTS_MEM_H_ diff --git a/vpx_ports/vpx_ports.mk b/vpx_ports/vpx_ports.mk index 53fbd1e80..233177369 100644 --- a/vpx_ports/vpx_ports.mk +++ b/vpx_ports/vpx_ports.mk @@ -12,6 +12,7 @@ PORTS_SRCS-yes += vpx_ports.mk PORTS_SRCS-yes += bitops.h +PORTS_SRCS-yes += compiler_attributes.h PORTS_SRCS-yes += mem.h PORTS_SRCS-yes += msvc.h PORTS_SRCS-yes += static_assert.h |