The Tor Browser: security/sandbox/chromium/base/compiler

security/sandbox/chromium/base/compiler_specific.h@141e0f1194b1 (annotated)

security/sandbox/chromium/base/compiler_specific.h

Wed, 31 Dec 2014 07:16:47 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:16:47 +0100
branch: TOR_BUG_9701
changeset 3: 141e0f1194b1
permissions: -rw-r--r--

Revert simplistic fix pending revisit of Mozilla integration attempt.

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #ifndef BASE_COMPILER_SPECIFIC_H_
 #define BASE_COMPILER_SPECIFIC_H_
 #include "build/build_config.h"
 #if defined(COMPILER_MSVC)
 // Macros for suppressing and disabling warnings on MSVC.
 //
 // Warning numbers are enumerated at:
 // http://msdn.microsoft.com/en-us/library/8x5x43k7(VS.80).aspx
 //
 // The warning pragma:
 // http://msdn.microsoft.com/en-us/library/2c8f766e(VS.80).aspx
 //
 // Using __pragma instead of #pragma inside macros:
 // http://msdn.microsoft.com/en-us/library/d9x1s805.aspx
 // MSVC_SUPPRESS_WARNING disables warning |n| for the remainder of the line and
 // for the next line of the source file.
 #define MSVC_SUPPRESS_WARNING(n) __pragma(warning(suppress:n))
 // MSVC_PUSH_DISABLE_WARNING pushes |n| onto a stack of warnings to be disabled.
 // The warning remains disabled until popped by MSVC_POP_WARNING.
 #define MSVC_PUSH_DISABLE_WARNING(n) __pragma(warning(push)) \
                                      __pragma(warning(disable:n))
 // MSVC_PUSH_WARNING_LEVEL pushes |n| as the global warning level.  The level
 // remains in effect until popped by MSVC_POP_WARNING().  Use 0 to disable all
 // warnings.
 #define MSVC_PUSH_WARNING_LEVEL(n) __pragma(warning(push, n))
 // Pop effects of innermost MSVC_PUSH_* macro.
 #define MSVC_POP_WARNING() __pragma(warning(pop))
 #define MSVC_DISABLE_OPTIMIZE() __pragma(optimize("", off))
 #define MSVC_ENABLE_OPTIMIZE() __pragma(optimize("", on))
 // Allows exporting a class that inherits from a non-exported base class.
 // This uses suppress instead of push/pop because the delimiter after the
 // declaration (either "," or "{") has to be placed before the pop macro.
 //
 // Example usage:
 // class EXPORT_API Foo : NON_EXPORTED_BASE(public Bar) {
 //
 // MSVC Compiler warning C4275:
 // non dll-interface class 'Bar' used as base for dll-interface class 'Foo'.
 // Note that this is intended to be used only when no access to the base class'
 // static data is done through derived classes or inline methods. For more info,
 // see http://msdn.microsoft.com/en-us/library/3tdb471s(VS.80).aspx
 #define NON_EXPORTED_BASE(code) MSVC_SUPPRESS_WARNING(4275) \
                                 code
 #else  // Not MSVC
 #define MSVC_SUPPRESS_WARNING(n)
 #define MSVC_PUSH_DISABLE_WARNING(n)
 #define MSVC_PUSH_WARNING_LEVEL(n)
 #define MSVC_POP_WARNING()
 #define MSVC_DISABLE_OPTIMIZE()
 #define MSVC_ENABLE_OPTIMIZE()
 #define NON_EXPORTED_BASE(code) code
 #endif  // COMPILER_MSVC
 // Annotate a variable indicating it's ok if the variable is not used.
 // (Typically used to silence a compiler warning when the assignment
 // is important for some other reason.)
 // Use like:
 //   int x ALLOW_UNUSED = ...;
 #if defined(COMPILER_GCC)
 #define ALLOW_UNUSED __attribute__((unused))
 #else
 #define ALLOW_UNUSED
 #endif
 // Annotate a function indicating it should not be inlined.
 // Use like:
 //   NOINLINE void DoStuff() { ... }
 #if defined(COMPILER_GCC)
 #define NOINLINE __attribute__((noinline))
 #elif defined(COMPILER_MSVC)
 #define NOINLINE __declspec(noinline)
 #else
 #define NOINLINE
 #endif
 // Specify memory alignment for structs, classes, etc.
 // Use like:
 //   class ALIGNAS(16) MyClass { ... }
 //   ALIGNAS(16) int array[4];
 #if defined(COMPILER_MSVC)
 #define ALIGNAS(byte_alignment) __declspec(align(byte_alignment))
 #elif defined(COMPILER_GCC)
 #define ALIGNAS(byte_alignment) __attribute__((aligned(byte_alignment)))
 #endif
 // Return the byte alignment of the given type (available at compile time).  Use
 // sizeof(type) prior to checking __alignof to workaround Visual C++ bug:
 // http://goo.gl/isH0C
 // Use like:
 //   ALIGNOF(int32)  // this would be 4
 #if defined(COMPILER_MSVC)
 #define ALIGNOF(type) (sizeof(type) - sizeof(type) + __alignof(type))
 #elif defined(COMPILER_GCC)
 #define ALIGNOF(type) __alignof__(type)
 #endif
 // Annotate a virtual method indicating it must be overriding a virtual
 // method in the parent class.
 // Use like:
 //   virtual void foo() OVERRIDE;
 #if defined(COMPILER_MSVC)
 #define OVERRIDE override
 #elif defined(__clang__)
 #define OVERRIDE override
 #else
 #define OVERRIDE
 #endif
 // Annotate a virtual method indicating that subclasses must not override it,
 // or annotate a class to indicate that it cannot be subclassed.
 // Use like:
 //   virtual void foo() FINAL;
 //   class B FINAL : public A {};
 #if defined(COMPILER_MSVC)
 // TODO(jered): Change this to "final" when chromium no longer uses MSVC 2010.
 #define FINAL sealed
 #elif defined(__clang__)
 #define FINAL final
 #else
 #define FINAL
 #endif
 // Annotate a function indicating the caller must examine the return value.
 // Use like:
 //   int foo() WARN_UNUSED_RESULT;
 // To explicitly ignore a result, see |ignore_result()| in <base/basictypes.h>.
 #if defined(COMPILER_GCC)
 #define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
 #else
 #define WARN_UNUSED_RESULT
 #endif
 // Tell the compiler a function is using a printf-style format string.
 // |format_param| is the one-based index of the format string parameter;
 // |dots_param| is the one-based index of the "..." parameter.
 // For v*printf functions (which take a va_list), pass 0 for dots_param.
 // (This is undocumented but matches what the system C headers do.)
 #if defined(COMPILER_GCC)
 #define PRINTF_FORMAT(format_param, dots_param) \
     __attribute__((format(printf, format_param, dots_param)))
 #else
 #define PRINTF_FORMAT(format_param, dots_param)
 #endif
 // WPRINTF_FORMAT is the same, but for wide format strings.
 // This doesn't appear to yet be implemented in any compiler.
 // See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38308 .
 #define WPRINTF_FORMAT(format_param, dots_param)
 // If available, it would look like:
 //   __attribute__((format(wprintf, format_param, dots_param)))
 // MemorySanitizer annotations.
 #ifdef MEMORY_SANITIZER
 extern "C" {
 void __msan_unpoison(const void *p, unsigned long s);
 }  // extern "C"
 // Mark a memory region fully initialized.
 // Use this to annotate code that deliberately reads uninitialized data, for
 // example a GC scavenging root set pointers from the stack.
 #define MSAN_UNPOISON(p, s)  __msan_unpoison(p, s)
 #else  // MEMORY_SANITIZER
 #define MSAN_UNPOISON(p, s)
 #endif  // MEMORY_SANITIZER
 #endif  // BASE_COMPILER_SPECIFIC_H_

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security/sandbox/chromium/base/compiler_specific.h@141e0f1194b1 (annotated)

security/sandbox/chromium/base/compiler_specific.h