diff options
Diffstat (limited to 'lib/sanitizer_common/sanitizer_internal_defs.h')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_internal_defs.h | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/lib/sanitizer_common/sanitizer_internal_defs.h b/lib/sanitizer_common/sanitizer_internal_defs.h index 5338f79423cc..ea5022e31bc3 100644 --- a/lib/sanitizer_common/sanitizer_internal_defs.h +++ b/lib/sanitizer_common/sanitizer_internal_defs.h @@ -21,8 +21,11 @@ // Only use SANITIZER_*ATTRIBUTE* before the function return type! #if SANITIZER_WINDOWS +#if SANITIZER_IMPORT_INTERFACE +# define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllimport) +#else # define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllexport) -// FIXME find out what we need on Windows, if anything. +#endif # define SANITIZER_WEAK_ATTRIBUTE #elif SANITIZER_GO # define SANITIZER_INTERFACE_ATTRIBUTE @@ -32,11 +35,46 @@ # define SANITIZER_WEAK_ATTRIBUTE __attribute__((weak)) #endif -#if (SANITIZER_LINUX || SANITIZER_MAC || SANITIZER_WINDOWS) && !SANITIZER_GO +//--------------------------- WEAK FUNCTIONS ---------------------------------// +// When working with weak functions, to simplify the code and make it more +// portable, when possible define a default implementation using this macro: +// +// SANITIZER_INTERFACE_WEAK_DEF(<return_type>, <name>, <parameter list>) +// +// For example: +// SANITIZER_INTERFACE_WEAK_DEF(bool, compare, int a, int b) { return a > b; } +// +#if SANITIZER_WINDOWS +#include "sanitizer_win_defs.h" +# define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...) \ + WIN_WEAK_EXPORT_DEF(ReturnType, Name, __VA_ARGS__) +#else +# define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...) \ + extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE \ + ReturnType Name(__VA_ARGS__) +#endif + +// SANITIZER_SUPPORTS_WEAK_HOOKS means that we support real weak functions that +// will evaluate to a null pointer when not defined. +#if (SANITIZER_LINUX || SANITIZER_MAC) && !SANITIZER_GO # define SANITIZER_SUPPORTS_WEAK_HOOKS 1 #else # define SANITIZER_SUPPORTS_WEAK_HOOKS 0 #endif +// For some weak hooks that will be called very often and we want to avoid the +// overhead of executing the default implementation when it is not necessary, +// we can use the flag SANITIZER_SUPPORTS_WEAK_HOOKS to only define the default +// implementation for platforms that doesn't support weak symbols. For example: +// +// #if !SANITIZER_SUPPORT_WEAK_HOOKS +// SANITIZER_INTERFACE_WEAK_DEF(bool, compare_hook, int a, int b) { +// return a > b; +// } +// #endif +// +// And then use it as: if (compare_hook) compare_hook(a, b); +//----------------------------------------------------------------------------// + // We can use .preinit_array section on Linux to call sanitizer initialization // functions very early in the process startup (unless PIC macro is defined). @@ -289,7 +327,12 @@ void NORETURN CheckFailed(const char *file, int line, const char *cond, enum LinkerInitialized { LINKER_INITIALIZED = 0 }; #if !defined(_MSC_VER) || defined(__clang__) +#if SANITIZER_S390_31 +#define GET_CALLER_PC() \ + (__sanitizer::uptr) __builtin_extract_return_addr(__builtin_return_address(0)) +#else #define GET_CALLER_PC() (__sanitizer::uptr) __builtin_return_address(0) +#endif #define GET_CURRENT_FRAME() (__sanitizer::uptr) __builtin_frame_address(0) inline void Trap() { __builtin_trap(); |