diff options
Diffstat (limited to 'src/sljit/sljitConfig.h')
| -rw-r--r-- | src/sljit/sljitConfig.h | 44 |
1 files changed, 27 insertions, 17 deletions
diff --git a/src/sljit/sljitConfig.h b/src/sljit/sljitConfig.h index 4560450..522db89 100644 --- a/src/sljit/sljitConfig.h +++ b/src/sljit/sljitConfig.h @@ -24,19 +24,19 @@ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef _SLJIT_CONFIG_H_ -#define _SLJIT_CONFIG_H_ +#ifndef SLJIT_CONFIG_H_ +#define SLJIT_CONFIG_H_ #ifdef __cplusplus extern "C" { #endif -/* --------------------------------------------------------------------- */ -/* Custom defines */ -/* --------------------------------------------------------------------- */ - -/* Put your custom defines here. This empty section will never change - which helps maintaining patches (with diff / patch utilities). */ +/* + This file contains the basic configuration options for the SLJIT compiler + and their default values. These options can be overridden in the + sljitConfigPre.h header file when SLJIT_HAVE_CONFIG_PRE is set to a + non-zero value. +*/ /* --------------------------------------------------------------------- */ /* Architecture */ @@ -63,12 +63,6 @@ extern "C" { /* Utilities */ /* --------------------------------------------------------------------- */ -/* Useful for thread-safe compiling of global functions. */ -#ifndef SLJIT_UTIL_GLOBAL_LOCK -/* Enabled by default */ -#define SLJIT_UTIL_GLOBAL_LOCK 1 -#endif - /* Implements a stack like data structure (by using mmap / VirtualAlloc */ /* or a custom allocator). */ #ifndef SLJIT_UTIL_STACK @@ -108,15 +102,31 @@ extern "C" { /* When SLJIT_PROT_EXECUTABLE_ALLOCATOR is enabled SLJIT uses an allocator which does not set writable and executable - permission flags at the same time. The trade-of is increased - memory consumption and disabled dynamic code modifications. */ + permission flags at the same time. + Instead, it creates a shared memory segment (usually backed by a file) + and maps it twice, with different permissions, depending on the use + case. + The trade-off is increased use of virtual memory, incompatibility with + fork(), and some possible additional security risks by the use of + publicly accessible files for the generated code. */ #ifndef SLJIT_PROT_EXECUTABLE_ALLOCATOR /* Disabled by default. */ #define SLJIT_PROT_EXECUTABLE_ALLOCATOR 0 #endif +/* When SLJIT_WX_EXECUTABLE_ALLOCATOR is enabled SLJIT uses an + allocator which does not set writable and executable permission + flags at the same time. + Instead, it creates a new independent map on each invocation and + switches permissions at the underlying pages as needed. + The trade-off is increased memory use and degraded performance. */ +#ifndef SLJIT_WX_EXECUTABLE_ALLOCATOR +/* Disabled by default. */ +#define SLJIT_WX_EXECUTABLE_ALLOCATOR 0 #endif +#endif /* !SLJIT_EXECUTABLE_ALLOCATOR */ + /* Force cdecl calling convention even if a better calling convention (e.g. fastcall) is supported by the C compiler. If this option is disabled (this is the default), functions @@ -159,4 +169,4 @@ extern "C" { } /* extern "C" */ #endif -#endif +#endif /* SLJIT_CONFIG_H_ */ |