JIT compiler update.
This commit is contained in:
Zoltán Herczeg
parent
25029849c3
commit
b6acebe497
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@ -158,6 +158,8 @@ extern "C" {
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#define SLJIT_CONFIG_MIPS_64 1
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#elif defined(__sparc__) || defined(__sparc)
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#define SLJIT_CONFIG_SPARC_32 1
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#elif defined(__s390x__)
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#define SLJIT_CONFIG_S390X 1
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#else
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/* Unsupported architecture */
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#define SLJIT_CONFIG_UNSUPPORTED 1
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@ -79,6 +79,7 @@
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*/
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#ifdef _WIN32
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
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static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
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{
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@ -91,65 +92,76 @@ static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
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VirtualFree(chunk, 0, MEM_RELEASE);
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}
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#else
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#ifdef __APPLE__
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#ifdef MAP_ANON
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/* Configures TARGET_OS_OSX when appropriate */
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#include <TargetConditionals.h>
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#if TARGET_OS_OSX && defined(MAP_JIT)
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#include <sys/utsname.h>
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#endif /* TARGET_OS_OSX && MAP_JIT */
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#ifdef MAP_JIT
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#else /* POSIX */
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#if defined(__APPLE__) && defined(MAP_JIT)
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/*
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On macOS systems, returns MAP_JIT if it is defined _and_ we're running on a
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version where it's OK to have more than one JIT block.
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version where it's OK to have more than one JIT block or where MAP_JIT is
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required.
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On non-macOS systems, returns MAP_JIT if it is defined.
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*/
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#include <TargetConditionals.h>
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#if TARGET_OS_OSX
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#if defined SLJIT_CONFIG_X86 && SLJIT_CONFIG_X86
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#ifdef MAP_ANON
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#include <sys/utsname.h>
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#include <stdlib.h>
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#define SLJIT_MAP_JIT (get_map_jit_flag())
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static SLJIT_INLINE int get_map_jit_flag()
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{
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#if TARGET_OS_OSX
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sljit_sw page_size = get_page_alignment() + 1;
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sljit_sw page_size;
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void *ptr;
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struct utsname name;
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static int map_jit_flag = -1;
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/*
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The following code is thread safe because multiple initialization
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sets map_jit_flag to the same value and the code has no side-effects.
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Changing the kernel version witout system restart is (very) unlikely.
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*/
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if (map_jit_flag == -1) {
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struct utsname name;
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if (map_jit_flag < 0) {
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map_jit_flag = 0;
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uname(&name);
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/* Kernel version for 10.14.0 (Mojave) */
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/* Kernel version for 10.14.0 (Mojave) or later */
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if (atoi(name.release) >= 18) {
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page_size = get_page_alignment() + 1;
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/* Only use MAP_JIT if a hardened runtime is used */
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ptr = mmap(NULL, page_size, PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANON, -1, 0);
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ptr = mmap(NULL, page_size, PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
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if (ptr == MAP_FAILED) {
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map_jit_flag = MAP_JIT;
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} else {
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if (ptr != MAP_FAILED)
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munmap(ptr, page_size);
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else
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map_jit_flag = MAP_JIT;
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}
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}
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}
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return map_jit_flag;
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#else /* !TARGET_OS_OSX */
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return MAP_JIT;
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#endif /* TARGET_OS_OSX */
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}
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#endif /* MAP_JIT */
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#endif /* MAP_ANON */
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#endif /* __APPLE__ */
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#else /* !SLJIT_CONFIG_X86 */
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#if !(defined SLJIT_CONFIG_ARM && SLJIT_CONFIG_ARM)
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#error Unsupported architecture
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#endif /* SLJIT_CONFIG_ARM */
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#include <pthread.h>
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#define SLJIT_MAP_JIT (MAP_JIT)
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) \
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apple_update_wx_flags(enable_exec)
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static SLJIT_INLINE void apple_update_wx_flags(sljit_s32 enable_exec)
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{
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pthread_jit_write_protect_np(enable_exec);
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}
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#endif /* SLJIT_CONFIG_X86 */
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#else /* !TARGET_OS_OSX */
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#define SLJIT_MAP_JIT (MAP_JIT)
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#endif /* TARGET_OS_OSX */
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#endif /* __APPLE__ && MAP_JIT */
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#ifndef SLJIT_UPDATE_WX_FLAGS
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#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
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#endif /* !SLJIT_UPDATE_WX_FLAGS */
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#ifndef SLJIT_MAP_JIT
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#define SLJIT_MAP_JIT (0)
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#endif /* !SLJIT_MAP_JIT */
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static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
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{
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@ -157,12 +169,7 @@ static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
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const int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
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#ifdef MAP_ANON
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int flags = MAP_PRIVATE | MAP_ANON;
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#ifdef MAP_JIT
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flags |= get_map_jit_flag();
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#endif
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int flags = MAP_PRIVATE | MAP_ANON | SLJIT_MAP_JIT;
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retval = mmap(NULL, size, prot, flags, -1, 0);
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#else /* !MAP_ANON */
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@ -173,14 +180,15 @@ static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
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#endif /* MAP_ANON */
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if (retval == MAP_FAILED)
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retval = NULL;
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else {
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return NULL;
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if (mprotect(retval, size, prot) < 0) {
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munmap(retval, size);
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retval = NULL;
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}
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return NULL;
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}
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SLJIT_UPDATE_WX_FLAGS(retval, (uint8_t *)retval + size, 0);
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return retval;
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}
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@ -189,7 +197,7 @@ static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
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munmap(chunk, size);
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}
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#endif
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#endif /* windows */
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/* --------------------------------------------------------------------- */
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/* Common functions */
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@ -261,6 +269,7 @@ SLJIT_API_FUNC_ATTRIBUTE void* sljit_malloc_exec(sljit_uw size)
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while (free_block) {
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if (free_block->size >= size) {
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chunk_size = free_block->size;
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SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
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if (chunk_size > size + 64) {
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/* We just cut a block from the end of the free block. */
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chunk_size -= size;
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@ -326,6 +335,7 @@ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
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allocated_size -= header->size;
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/* Connecting free blocks together if possible. */
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SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
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/* If header->prev_size == 0, free_block will equal to header.
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In this case, free_block->header.size will be > 0. */
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@ -358,6 +368,7 @@ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
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}
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}
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SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 1);
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SLJIT_ALLOCATOR_UNLOCK();
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}
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@ -367,6 +378,7 @@ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void)
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struct free_block* next_free_block;
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SLJIT_ALLOCATOR_LOCK();
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SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
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free_block = free_blocks;
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while (free_block) {
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@ -381,5 +393,6 @@ SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void)
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}
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SLJIT_ASSERT((total_size && free_blocks) || (!total_size && !free_blocks));
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SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 1);
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SLJIT_ALLOCATOR_UNLOCK();
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}
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@ -42,7 +42,7 @@ SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
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typedef sljit_uw sljit_ins;
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/* Instruction tags (most significant halfword). */
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const sljit_ins sljit_ins_const = (sljit_ins)1 << 48;
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static const sljit_ins sljit_ins_const = (sljit_ins)1 << 48;
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static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 4] = {
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14, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 0, 1
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@ -66,22 +66,22 @@ typedef sljit_uw sljit_gpr;
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* will be retired ASAP (TODO: carenas)
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*/
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const sljit_gpr r0 = 0; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 2]: 0 in address calculations; reserved */
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const sljit_gpr r1 = 1; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 3]: reserved */
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const sljit_gpr r2 = 2; /* reg_map[1]: 1st argument */
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const sljit_gpr r3 = 3; /* reg_map[2]: 2nd argument */
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const sljit_gpr r4 = 4; /* reg_map[3]: 3rd argument */
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const sljit_gpr r5 = 5; /* reg_map[4]: 4th argument */
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const sljit_gpr r6 = 6; /* reg_map[5]: 5th argument; 1st saved register */
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const sljit_gpr r7 = 7; /* reg_map[6] */
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const sljit_gpr r8 = 8; /* reg_map[7] */
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const sljit_gpr r9 = 9; /* reg_map[8] */
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const sljit_gpr r10 = 10; /* reg_map[9] */
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const sljit_gpr r11 = 11; /* reg_map[10] */
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const sljit_gpr r12 = 12; /* reg_map[11]: GOT */
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const sljit_gpr r13 = 13; /* reg_map[12]: Literal Pool pointer */
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const sljit_gpr r14 = 14; /* reg_map[0]: return address and flag register */
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const sljit_gpr r15 = 15; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 1]: stack pointer */
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static const sljit_gpr r0 = 0; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 2]: 0 in address calculations; reserved */
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static const sljit_gpr r1 = 1; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 3]: reserved */
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static const sljit_gpr r2 = 2; /* reg_map[1]: 1st argument */
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static const sljit_gpr r3 = 3; /* reg_map[2]: 2nd argument */
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static const sljit_gpr r4 = 4; /* reg_map[3]: 3rd argument */
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static const sljit_gpr r5 = 5; /* reg_map[4]: 4th argument */
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static const sljit_gpr r6 = 6; /* reg_map[5]: 5th argument; 1st saved register */
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static const sljit_gpr r7 = 7; /* reg_map[6] */
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static const sljit_gpr r8 = 8; /* reg_map[7] */
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static const sljit_gpr r9 = 9; /* reg_map[8] */
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static const sljit_gpr r10 = 10; /* reg_map[9] */
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static const sljit_gpr r11 = 11; /* reg_map[10] */
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static const sljit_gpr r12 = 12; /* reg_map[11]: GOT */
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static const sljit_gpr r13 = 13; /* reg_map[12]: Literal Pool pointer */
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static const sljit_gpr r14 = 14; /* reg_map[0]: return address and flag register */
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static const sljit_gpr r15 = 15; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 1]: stack pointer */
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/* WARNING: r12 and r13 shouldn't be used as per ABI recommendation */
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/* TODO(carenas): r12 might conflict in PIC code, reserve? */
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@ -100,8 +100,8 @@ const sljit_gpr r15 = 15; /* reg_map[SLJIT_NUMBER_OF_REGISTERS + 1]: stack point
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/* Link registers. The normal link register is r14, but since
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we use that for flags we need to use r0 instead to do fast
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calls so that flags are preserved. */
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const sljit_gpr link_r = 14; /* r14 */
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const sljit_gpr fast_link_r = 0; /* r0 */
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static const sljit_gpr link_r = 14; /* r14 */
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static const sljit_gpr fast_link_r = 0; /* r0 */
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/* Flag register layout:
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@ -110,7 +110,7 @@ const sljit_gpr fast_link_r = 0; /* r0 */
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| ZERO | 0 | 0 | C C |///////|
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+---------------+---+---+-------+-------+
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*/
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const sljit_gpr flag_r = 14; /* r14 */
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static const sljit_gpr flag_r = 14; /* r14 */
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struct sljit_s390x_const {
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struct sljit_const const_; /* must be first */
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@ -1465,7 +1465,8 @@ SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compile
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op = GET_OPCODE(op) | (op & SLJIT_I32_OP);
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switch (op) {
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case SLJIT_BREAKPOINT:
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/* TODO(mundaym): insert real breakpoint? */
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/* The following invalid instruction is emitted by gdb. */
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return push_inst(compiler, 0x0001 /* 2-byte trap */);
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case SLJIT_NOP:
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return push_inst(compiler, 0x0700 /* 2-byte nop */);
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case SLJIT_LMUL_UW:
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