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Merge pull request #89495 from akien-mga/pcre2-fix-sljit-compilation-ioscross

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pcre2: Remove unused sjlit files after last update
This commit is contained in:
Rémi Verschelde 2024-03-15 10:40:10 +01:00
commit 9c2db0c035
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GPG key ID: C3336907360768E1
6 changed files with 2 additions and 1127 deletions
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3
modules/regex/SCsub
View file

@ -29,7 +29,7 @@ if env["builtin_pcre2"]:
"pcre2_extuni.c",
"pcre2_find_bracket.c",
"pcre2_jit_compile.c",
# "pcre2_jit_match.c", "pcre2_jit_misc.c", # these files are included in pcre2_jit_compile.c.
# "pcre2_jit_match.c", "pcre2_jit_misc.c", # Included in `pcre2_jit_compile.c`.
"pcre2_maketables.c",
"pcre2_match.c",
"pcre2_match_data.c",
@ -44,6 +44,7 @@ if env["builtin_pcre2"]:
"pcre2_substring.c",
"pcre2_tables.c",
"pcre2_ucd.c",
# "pcre2_ucptables.c", # Included in `pcre2_tables.c`.
"pcre2_valid_utf.c",
"pcre2_xclass.c",
]

3
thirdparty/README.md vendored
View file

@ -769,9 +769,6 @@ Files extracted from upstream source:
- `src/sljit/`
- `AUTHORS` and `LICENCE`
A sljit patch from upstream was backported to fix macOS < 11.0 compilation
in 10.40, it can be found in the `patches` folder.
## recastnavigation

31
thirdparty/pcre2/patches/sljit-macos11-conditional.patch vendored
View file

@ -1,31 +0,0 @@
From de8fc816bc6698ab97316ed954e133e7e5098262 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlo=20Marcelo=20Arenas=20Bel=C3=B3n?= <carenas@gmail.com>
Date: Thu, 21 Apr 2022 21:01:12 -0700
Subject: [PATCH] macos: somehow allow building with a target below 11.0
While building for macOS older than 11 in Apple Silicon makes no
sense, some build systems lack the flexibility to set a target per
architecture while aiming to support multi architecture binaries.
Allow an option in those cases by using the slower runtime checks
if the toolchain allows it.
Fixes: PCRE2Project/pcre2#109
---
thirdparty/pcre2/src/sljit/sljitExecAllocator.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/thirdparty/pcre2/src/sljit/sljitExecAllocator.c b/thirdparty/pcre2/src/sljit/sljitExecAllocator.c
index 92d940ddc2..6359848cd5 100644
--- a/thirdparty/pcre2/src/sljit/sljitExecAllocator.c
+++ b/thirdparty/pcre2/src/sljit/sljitExecAllocator.c
@@ -152,6 +152,9 @@ static SLJIT_INLINE void apple_update_wx_flags(sljit_s32 enable_exec)
{
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 110000
pthread_jit_write_protect_np(enable_exec);
+#elif defined(__clang__)
+ if (__builtin_available(macOS 11.0, *))
+ pthread_jit_write_protect_np(enable_exec);
#else
#error "Must target Big Sur or newer"
#endif /* BigSur */

414
thirdparty/pcre2/src/sljit/sljitExecAllocator.c vendored
View file

@ -1,414 +0,0 @@
/*
* Stack-less Just-In-Time compiler
*
* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
This file contains a simple executable memory allocator
It is assumed, that executable code blocks are usually medium (or sometimes
large) memory blocks, and the allocator is not too frequently called (less
optimized than other allocators). Thus, using it as a generic allocator is
not suggested.
How does it work:
Memory is allocated in continuous memory areas called chunks by alloc_chunk()
Chunk format:
[ block ][ block ] ... [ block ][ block terminator ]
All blocks and the block terminator is started with block_header. The block
header contains the size of the previous and the next block. These sizes
can also contain special values.
Block size:
0 - The block is a free_block, with a different size member.
1 - The block is a block terminator.
n - The block is used at the moment, and the value contains its size.
Previous block size:
0 - This is the first block of the memory chunk.
n - The size of the previous block.
Using these size values we can go forward or backward on the block chain.
The unused blocks are stored in a chain list pointed by free_blocks. This
list is useful if we need to find a suitable memory area when the allocator
is called.
When a block is freed, the new free block is connected to its adjacent free
blocks if possible.
[ free block ][ used block ][ free block ]
and "used block" is freed, the three blocks are connected together:
[ one big free block ]
*/
/* --------------------------------------------------------------------- */
/* System (OS) functions */
/* --------------------------------------------------------------------- */
/* 64 KByte. */
#define CHUNK_SIZE (sljit_uw)0x10000u
/*
alloc_chunk / free_chunk :
* allocate executable system memory chunks
* the size is always divisible by CHUNK_SIZE
SLJIT_ALLOCATOR_LOCK / SLJIT_ALLOCATOR_UNLOCK :
* provided as part of sljitUtils
* only the allocator requires this lock, sljit is fully thread safe
as it only uses local variables
*/
#ifdef _WIN32
#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
{
return VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
}
static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
{
SLJIT_UNUSED_ARG(size);
VirtualFree(chunk, 0, MEM_RELEASE);
}
#else /* POSIX */
#if defined(__APPLE__) && defined(MAP_JIT)
/*
On macOS systems, returns MAP_JIT if it is defined _and_ we're running on a
version where it's OK to have more than one JIT block or where MAP_JIT is
required.
On non-macOS systems, returns MAP_JIT if it is defined.
*/
#include <TargetConditionals.h>
#if TARGET_OS_OSX
#if defined SLJIT_CONFIG_X86 && SLJIT_CONFIG_X86
#ifdef MAP_ANON
#include <sys/utsname.h>
#include <stdlib.h>
#define SLJIT_MAP_JIT (get_map_jit_flag())
static SLJIT_INLINE int get_map_jit_flag()
{
size_t page_size;
void *ptr;
struct utsname name;
static int map_jit_flag = -1;
if (map_jit_flag < 0) {
map_jit_flag = 0;
uname(&name);
/* Kernel version for 10.14.0 (Mojave) or later */
if (atoi(name.release) >= 18) {
page_size = get_page_alignment() + 1;
/* Only use MAP_JIT if a hardened runtime is used */
ptr = mmap(NULL, page_size, PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (ptr != MAP_FAILED)
munmap(ptr, page_size);
else
map_jit_flag = MAP_JIT;
}
}
return map_jit_flag;
}
#endif /* MAP_ANON */
#else /* !SLJIT_CONFIG_X86 */
#if !(defined SLJIT_CONFIG_ARM && SLJIT_CONFIG_ARM)
#error "Unsupported architecture"
#endif /* SLJIT_CONFIG_ARM */
#include <AvailabilityMacros.h>
#include <pthread.h>
#define SLJIT_MAP_JIT (MAP_JIT)
#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) \
apple_update_wx_flags(enable_exec)
static SLJIT_INLINE void apple_update_wx_flags(sljit_s32 enable_exec)
{
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 110000
pthread_jit_write_protect_np(enable_exec);
#elif defined(__clang__)
if (__builtin_available(macOS 11.0, *))
pthread_jit_write_protect_np(enable_exec);
#else
#error "Must target Big Sur or newer"
#endif /* BigSur */
}
#endif /* SLJIT_CONFIG_X86 */
#else /* !TARGET_OS_OSX */
#define SLJIT_MAP_JIT (MAP_JIT)
#endif /* TARGET_OS_OSX */
#endif /* __APPLE__ && MAP_JIT */
#ifndef SLJIT_UPDATE_WX_FLAGS
#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec)
#endif /* !SLJIT_UPDATE_WX_FLAGS */
#ifndef SLJIT_MAP_JIT
#define SLJIT_MAP_JIT (0)
#endif /* !SLJIT_MAP_JIT */
static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
{
void *retval;
int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
int flags = MAP_PRIVATE;
int fd = -1;
#ifdef PROT_MAX
prot |= PROT_MAX(prot);
#endif
#ifdef MAP_ANON
flags |= MAP_ANON | SLJIT_MAP_JIT;
#else /* !MAP_ANON */
if (SLJIT_UNLIKELY((dev_zero < 0) && open_dev_zero()))
return NULL;
fd = dev_zero;
#endif /* MAP_ANON */
retval = mmap(NULL, size, prot, flags, fd, 0);
if (retval == MAP_FAILED)
return NULL;
#ifdef __FreeBSD__
/* HardenedBSD's mmap lies, so check permissions again */
if (mprotect(retval, size, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) {
munmap(retval, size);
return NULL;
}
#endif /* FreeBSD */
SLJIT_UPDATE_WX_FLAGS(retval, (uint8_t *)retval + size, 0);
return retval;
}
static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
{
munmap(chunk, size);
}
#endif /* windows */
/* --------------------------------------------------------------------- */
/* Common functions */
/* --------------------------------------------------------------------- */
#define CHUNK_MASK (~(CHUNK_SIZE - 1))
struct block_header {
sljit_uw size;
sljit_uw prev_size;
};
struct free_block {
struct block_header header;
struct free_block *next;
struct free_block *prev;
sljit_uw size;
};
#define AS_BLOCK_HEADER(base, offset) \
((struct block_header*)(((sljit_u8*)base) + offset))
#define AS_FREE_BLOCK(base, offset) \
((struct free_block*)(((sljit_u8*)base) + offset))
#define MEM_START(base) ((void*)(((sljit_u8*)base) + sizeof(struct block_header)))
#define ALIGN_SIZE(size) (((size) + sizeof(struct block_header) + 7u) & ~(sljit_uw)7)
static struct free_block* free_blocks;
static sljit_uw allocated_size;
static sljit_uw total_size;
static SLJIT_INLINE void sljit_insert_free_block(struct free_block *free_block, sljit_uw size)
{
free_block->header.size = 0;
free_block->size = size;
free_block->next = free_blocks;
free_block->prev = NULL;
if (free_blocks)
free_blocks->prev = free_block;
free_blocks = free_block;
}
static SLJIT_INLINE void sljit_remove_free_block(struct free_block *free_block)
{
if (free_block->next)
free_block->next->prev = free_block->prev;
if (free_block->prev)
free_block->prev->next = free_block->next;
else {
SLJIT_ASSERT(free_blocks == free_block);
free_blocks = free_block->next;
}
}
SLJIT_API_FUNC_ATTRIBUTE void* sljit_malloc_exec(sljit_uw size)
{
struct block_header *header;
struct block_header *next_header;
struct free_block *free_block;
sljit_uw chunk_size;
SLJIT_ALLOCATOR_LOCK();
if (size < (64 - sizeof(struct block_header)))
size = (64 - sizeof(struct block_header));
size = ALIGN_SIZE(size);
free_block = free_blocks;
while (free_block) {
if (free_block->size >= size) {
chunk_size = free_block->size;
SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
if (chunk_size > size + 64) {
/* We just cut a block from the end of the free block. */
chunk_size -= size;
free_block->size = chunk_size;
header = AS_BLOCK_HEADER(free_block, chunk_size);
header->prev_size = chunk_size;
AS_BLOCK_HEADER(header, size)->prev_size = size;
}
else {
sljit_remove_free_block(free_block);
header = (struct block_header*)free_block;
size = chunk_size;
}
allocated_size += size;
header->size = size;
SLJIT_ALLOCATOR_UNLOCK();
return MEM_START(header);
}
free_block = free_block->next;
}
chunk_size = (size + sizeof(struct block_header) + CHUNK_SIZE - 1) & CHUNK_MASK;
header = (struct block_header*)alloc_chunk(chunk_size);
if (!header) {
SLJIT_ALLOCATOR_UNLOCK();
return NULL;
}
chunk_size -= sizeof(struct block_header);
total_size += chunk_size;
header->prev_size = 0;
if (chunk_size > size + 64) {
/* Cut the allocated space into a free and a used block. */
allocated_size += size;
header->size = size;
chunk_size -= size;
free_block = AS_FREE_BLOCK(header, size);
free_block->header.prev_size = size;
sljit_insert_free_block(free_block, chunk_size);
next_header = AS_BLOCK_HEADER(free_block, chunk_size);
}
else {
/* All space belongs to this allocation. */
allocated_size += chunk_size;
header->size = chunk_size;
next_header = AS_BLOCK_HEADER(header, chunk_size);
}
next_header->size = 1;
next_header->prev_size = chunk_size;
SLJIT_ALLOCATOR_UNLOCK();
return MEM_START(header);
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
{
struct block_header *header;
struct free_block* free_block;
SLJIT_ALLOCATOR_LOCK();
header = AS_BLOCK_HEADER(ptr, -(sljit_sw)sizeof(struct block_header));
allocated_size -= header->size;
/* Connecting free blocks together if possible. */
SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
/* If header->prev_size == 0, free_block will equal to header.
In this case, free_block->header.size will be > 0. */
free_block = AS_FREE_BLOCK(header, -(sljit_sw)header->prev_size);
if (SLJIT_UNLIKELY(!free_block->header.size)) {
free_block->size += header->size;
header = AS_BLOCK_HEADER(free_block, free_block->size);
header->prev_size = free_block->size;
}
else {
free_block = (struct free_block*)header;
sljit_insert_free_block(free_block, header->size);
}
header = AS_BLOCK_HEADER(free_block, free_block->size);
if (SLJIT_UNLIKELY(!header->size)) {
free_block->size += ((struct free_block*)header)->size;
sljit_remove_free_block((struct free_block*)header);
header = AS_BLOCK_HEADER(free_block, free_block->size);
header->prev_size = free_block->size;
}
/* The whole chunk is free. */
if (SLJIT_UNLIKELY(!free_block->header.prev_size && header->size == 1)) {
/* If this block is freed, we still have (allocated_size / 2) free space. */
if (total_size - free_block->size > (allocated_size * 3 / 2)) {
total_size -= free_block->size;
sljit_remove_free_block(free_block);
free_chunk(free_block, free_block->size + sizeof(struct block_header));
}
}
SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 1);
SLJIT_ALLOCATOR_UNLOCK();
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void)
{
struct free_block* free_block;
struct free_block* next_free_block;
SLJIT_ALLOCATOR_LOCK();
SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 0);
free_block = free_blocks;
while (free_block) {
next_free_block = free_block->next;
if (!free_block->header.prev_size &&
AS_BLOCK_HEADER(free_block, free_block->size)->size == 1) {
total_size -= free_block->size;
sljit_remove_free_block(free_block);
free_chunk(free_block, free_block->size + sizeof(struct block_header));
}
free_block = next_free_block;
}
SLJIT_ASSERT((total_size && free_blocks) || (!total_size && !free_blocks));
SLJIT_UPDATE_WX_FLAGS(NULL, NULL, 1);
SLJIT_ALLOCATOR_UNLOCK();
}

474
thirdparty/pcre2/src/sljit/sljitProtExecAllocator.c vendored
View file

@ -1,474 +0,0 @@
/*
* Stack-less Just-In-Time compiler
*
* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
This file contains a simple executable memory allocator
It is assumed, that executable code blocks are usually medium (or sometimes
large) memory blocks, and the allocator is not too frequently called (less
optimized than other allocators). Thus, using it as a generic allocator is
not suggested.
How does it work:
Memory is allocated in continuous memory areas called chunks by alloc_chunk()
Chunk format:
[ block ][ block ] ... [ block ][ block terminator ]
All blocks and the block terminator is started with block_header. The block
header contains the size of the previous and the next block. These sizes
can also contain special values.
Block size:
0 - The block is a free_block, with a different size member.
1 - The block is a block terminator.
n - The block is used at the moment, and the value contains its size.
Previous block size:
0 - This is the first block of the memory chunk.
n - The size of the previous block.
Using these size values we can go forward or backward on the block chain.
The unused blocks are stored in a chain list pointed by free_blocks. This
list is useful if we need to find a suitable memory area when the allocator
is called.
When a block is freed, the new free block is connected to its adjacent free
blocks if possible.
[ free block ][ used block ][ free block ]
and "used block" is freed, the three blocks are connected together:
[ one big free block ]
*/
/* --------------------------------------------------------------------- */
/* System (OS) functions */
/* --------------------------------------------------------------------- */
/* 64 KByte. */
#define CHUNK_SIZE (sljit_uw)0x10000
struct chunk_header {
void *executable;
};
/*
alloc_chunk / free_chunk :
* allocate executable system memory chunks
* the size is always divisible by CHUNK_SIZE
SLJIT_ALLOCATOR_LOCK / SLJIT_ALLOCATOR_UNLOCK :
* provided as part of sljitUtils
* only the allocator requires this lock, sljit is fully thread safe
as it only uses local variables
*/
#ifndef __NetBSD__
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#ifndef O_NOATIME
#define O_NOATIME 0
#endif
/* this is a linux extension available since kernel 3.11 */
#ifndef O_TMPFILE
#define O_TMPFILE 020200000
#endif
#ifndef _GNU_SOURCE
char *secure_getenv(const char *name);
int mkostemp(char *template, int flags);
#endif
static SLJIT_INLINE int create_tempfile(void)
{
int fd;
char tmp_name[256];
size_t tmp_name_len = 0;
char *dir;
struct stat st;
#if defined(SLJIT_SINGLE_THREADED) && SLJIT_SINGLE_THREADED
mode_t mode;
#endif
#ifdef HAVE_MEMFD_CREATE
/* this is a GNU extension, make sure to use -D_GNU_SOURCE */
fd = memfd_create("sljit", MFD_CLOEXEC);
if (fd != -1) {
fchmod(fd, 0);
return fd;
}
#endif
dir = secure_getenv("TMPDIR");
if (dir) {
tmp_name_len = strlen(dir);
if (tmp_name_len > 0 && tmp_name_len < sizeof(tmp_name)) {
if ((stat(dir, &st) == 0) && S_ISDIR(st.st_mode))
strcpy(tmp_name, dir);
}
}
#ifdef P_tmpdir
if (!tmp_name_len) {
tmp_name_len = strlen(P_tmpdir);
if (tmp_name_len > 0 && tmp_name_len < sizeof(tmp_name))
strcpy(tmp_name, P_tmpdir);
}
#endif
if (!tmp_name_len) {
strcpy(tmp_name, "/tmp");
tmp_name_len = 4;
}
SLJIT_ASSERT(tmp_name_len > 0 && tmp_name_len < sizeof(tmp_name));
if (tmp_name[tmp_name_len - 1] == '/')
tmp_name[--tmp_name_len] = '\0';
#ifdef __linux__
/*
* the previous trimming might had left an empty string if TMPDIR="/"
* so work around the problem below
*/
fd = open(tmp_name_len ? tmp_name : "/",
O_TMPFILE | O_EXCL | O_RDWR | O_NOATIME | O_CLOEXEC, 0);
if (fd != -1)
return fd;
#endif
if (tmp_name_len + 7 >= sizeof(tmp_name))
return -1;
strcpy(tmp_name + tmp_name_len, "/XXXXXX");
#if defined(SLJIT_SINGLE_THREADED) && SLJIT_SINGLE_THREADED
mode = umask(0777);
#endif
fd = mkostemp(tmp_name, O_CLOEXEC | O_NOATIME);
#if defined(SLJIT_SINGLE_THREADED) && SLJIT_SINGLE_THREADED
umask(mode);
#else
fchmod(fd, 0);
#endif
if (fd == -1)
return -1;
if (unlink(tmp_name)) {
close(fd);
return -1;
}
return fd;
}
static SLJIT_INLINE struct chunk_header* alloc_chunk(sljit_uw size)
{
struct chunk_header *retval;
int fd;
fd = create_tempfile();
if (fd == -1)
return NULL;
if (ftruncate(fd, (off_t)size)) {
close(fd);
return NULL;
}
retval = (struct chunk_header *)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (retval == MAP_FAILED) {
close(fd);
return NULL;
}
retval->executable = mmap(NULL, size, PROT_READ | PROT_EXEC, MAP_SHARED, fd, 0);
if (retval->executable == MAP_FAILED) {
munmap((void *)retval, size);
close(fd);
return NULL;
}
close(fd);
return retval;
}
#else
/*
* MAP_REMAPDUP is a NetBSD extension available sinde 8.0, make sure to
* adjust your feature macros (ex: -D_NETBSD_SOURCE) as needed
*/
static SLJIT_INLINE struct chunk_header* alloc_chunk(sljit_uw size)
{
struct chunk_header *retval;
retval = (struct chunk_header *)mmap(NULL, size,
PROT_READ | PROT_WRITE | PROT_MPROTECT(PROT_EXEC),
MAP_ANON | MAP_SHARED, -1, 0);
if (retval == MAP_FAILED)
return NULL;
retval->executable = mremap(retval, size, NULL, size, MAP_REMAPDUP);
if (retval->executable == MAP_FAILED) {
munmap((void *)retval, size);
return NULL;
}
if (mprotect(retval->executable, size, PROT_READ | PROT_EXEC) == -1) {
munmap(retval->executable, size);
munmap((void *)retval, size);
return NULL;
}
return retval;
}
#endif /* NetBSD */
static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
{
struct chunk_header *header = ((struct chunk_header *)chunk) - 1;
munmap(header->executable, size);
munmap((void *)header, size);
}
/* --------------------------------------------------------------------- */
/* Common functions */
/* --------------------------------------------------------------------- */
#define CHUNK_MASK (~(CHUNK_SIZE - 1))
struct block_header {
sljit_uw size;
sljit_uw prev_size;
sljit_sw executable_offset;
};
struct free_block {
struct block_header header;
struct free_block *next;
struct free_block *prev;
sljit_uw size;
};
#define AS_BLOCK_HEADER(base, offset) \
((struct block_header*)(((sljit_u8*)base) + offset))
#define AS_FREE_BLOCK(base, offset) \
((struct free_block*)(((sljit_u8*)base) + offset))
#define MEM_START(base) ((void*)((base) + 1))
#define ALIGN_SIZE(size) (((size) + sizeof(struct block_header) + 7u) & ~(sljit_uw)7)
static struct free_block* free_blocks;
static sljit_uw allocated_size;
static sljit_uw total_size;
static SLJIT_INLINE void sljit_insert_free_block(struct free_block *free_block, sljit_uw size)
{
free_block->header.size = 0;
free_block->size = size;
free_block->next = free_blocks;
free_block->prev = NULL;
if (free_blocks)
free_blocks->prev = free_block;
free_blocks = free_block;
}
static SLJIT_INLINE void sljit_remove_free_block(struct free_block *free_block)
{
if (free_block->next)
free_block->next->prev = free_block->prev;
if (free_block->prev)
free_block->prev->next = free_block->next;
else {
SLJIT_ASSERT(free_blocks == free_block);
free_blocks = free_block->next;
}
}
SLJIT_API_FUNC_ATTRIBUTE void* sljit_malloc_exec(sljit_uw size)
{
struct chunk_header *chunk_header;
struct block_header *header;
struct block_header *next_header;
struct free_block *free_block;
sljit_uw chunk_size;
sljit_sw executable_offset;
SLJIT_ALLOCATOR_LOCK();
if (size < (64 - sizeof(struct block_header)))
size = (64 - sizeof(struct block_header));
size = ALIGN_SIZE(size);
free_block = free_blocks;
while (free_block) {
if (free_block->size >= size) {
chunk_size = free_block->size;
if (chunk_size > size + 64) {
/* We just cut a block from the end of the free block. */
chunk_size -= size;
free_block->size = chunk_size;
header = AS_BLOCK_HEADER(free_block, chunk_size);
header->prev_size = chunk_size;
header->executable_offset = free_block->header.executable_offset;
AS_BLOCK_HEADER(header, size)->prev_size = size;
}
else {
sljit_remove_free_block(free_block);
header = (struct block_header*)free_block;
size = chunk_size;
}
allocated_size += size;
header->size = size;
SLJIT_ALLOCATOR_UNLOCK();
return MEM_START(header);
}
free_block = free_block->next;
}
chunk_size = sizeof(struct chunk_header) + sizeof(struct block_header);
chunk_size = (chunk_size + size + CHUNK_SIZE - 1) & CHUNK_MASK;
chunk_header = alloc_chunk(chunk_size);
if (!chunk_header) {
SLJIT_ALLOCATOR_UNLOCK();
return NULL;
}
executable_offset = (sljit_sw)((sljit_u8*)chunk_header->executable - (sljit_u8*)chunk_header);
chunk_size -= sizeof(struct chunk_header) + sizeof(struct block_header);
total_size += chunk_size;
header = (struct block_header *)(chunk_header + 1);
header->prev_size = 0;
header->executable_offset = executable_offset;
if (chunk_size > size + 64) {
/* Cut the allocated space into a free and a used block. */
allocated_size += size;
header->size = size;
chunk_size -= size;
free_block = AS_FREE_BLOCK(header, size);
free_block->header.prev_size = size;
free_block->header.executable_offset = executable_offset;
sljit_insert_free_block(free_block, chunk_size);
next_header = AS_BLOCK_HEADER(free_block, chunk_size);
}
else {
/* All space belongs to this allocation. */
allocated_size += chunk_size;
header->size = chunk_size;
next_header = AS_BLOCK_HEADER(header, chunk_size);
}
next_header->size = 1;
next_header->prev_size = chunk_size;
next_header->executable_offset = executable_offset;
SLJIT_ALLOCATOR_UNLOCK();
return MEM_START(header);
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
{
struct block_header *header;
struct free_block* free_block;
SLJIT_ALLOCATOR_LOCK();
header = AS_BLOCK_HEADER(ptr, -(sljit_sw)sizeof(struct block_header));
header = AS_BLOCK_HEADER(header, -header->executable_offset);
allocated_size -= header->size;
/* Connecting free blocks together if possible. */
/* If header->prev_size == 0, free_block will equal to header.
In this case, free_block->header.size will be > 0. */
free_block = AS_FREE_BLOCK(header, -(sljit_sw)header->prev_size);
if (SLJIT_UNLIKELY(!free_block->header.size)) {
free_block->size += header->size;
header = AS_BLOCK_HEADER(free_block, free_block->size);
header->prev_size = free_block->size;
}
else {
free_block = (struct free_block*)header;
sljit_insert_free_block(free_block, header->size);
}
header = AS_BLOCK_HEADER(free_block, free_block->size);
if (SLJIT_UNLIKELY(!header->size)) {
free_block->size += ((struct free_block*)header)->size;
sljit_remove_free_block((struct free_block*)header);
header = AS_BLOCK_HEADER(free_block, free_block->size);
header->prev_size = free_block->size;
}
/* The whole chunk is free. */
if (SLJIT_UNLIKELY(!free_block->header.prev_size && header->size == 1)) {
/* If this block is freed, we still have (allocated_size / 2) free space. */
if (total_size - free_block->size > (allocated_size * 3 / 2)) {
total_size -= free_block->size;
sljit_remove_free_block(free_block);
free_chunk(free_block, free_block->size +
sizeof(struct chunk_header) +
sizeof(struct block_header));
}
}
SLJIT_ALLOCATOR_UNLOCK();
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void)
{
struct free_block* free_block;
struct free_block* next_free_block;
SLJIT_ALLOCATOR_LOCK();
free_block = free_blocks;
while (free_block) {
next_free_block = free_block->next;
if (!free_block->header.prev_size &&
AS_BLOCK_HEADER(free_block, free_block->size)->size == 1) {
total_size -= free_block->size;
sljit_remove_free_block(free_block);
free_chunk(free_block, free_block->size +
sizeof(struct chunk_header) +
sizeof(struct block_header));
}
free_block = next_free_block;
}
SLJIT_ASSERT((total_size && free_blocks) || (!total_size && !free_blocks));
SLJIT_ALLOCATOR_UNLOCK();
}
SLJIT_API_FUNC_ATTRIBUTE sljit_sw sljit_exec_offset(void* ptr)
{
return ((struct block_header *)(ptr))[-1].executable_offset;
}

204
thirdparty/pcre2/src/sljit/sljitWXExecAllocator.c vendored
View file

@ -1,204 +0,0 @@
/*
* Stack-less Just-In-Time compiler
*
* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
This file contains a simple W^X executable memory allocator for POSIX
like systems and Windows
In *NIX, MAP_ANON is required (that is considered a feature) so make
sure to set the right availability macros for your system or the code
will fail to build.
If your system doesn't support mapping of anonymous pages (ex: IRIX) it
is also likely that it doesn't need this allocator and should be using
the standard one instead.
It allocates a separate map for each code block and may waste a lot of
memory, because whatever was requested, will be rounded up to the page
size (minimum 4KB, but could be even bigger).
It changes the page permissions (RW <-> RX) as needed and therefore, if you
will be updating the code after it has been generated, need to make sure to
block any concurrent execution, or could result in a SIGBUS, that could
even manifest itself at a different address than the one that was being
modified.
Only use if you are unable to use the regular allocator because of security
restrictions and adding exceptions to your application or the system are
not possible.
*/
#define SLJIT_UPDATE_WX_FLAGS(from, to, enable_exec) \
sljit_update_wx_flags((from), (to), (enable_exec))
#ifndef _WIN32
#include <sys/types.h>
#include <sys/mman.h>
#ifdef __NetBSD__
#define SLJIT_PROT_WX PROT_MPROTECT(PROT_EXEC)
#define check_se_protected(ptr, size) (0)
#else /* POSIX */
#if !(defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED)
#include <pthread.h>
#define SLJIT_SE_LOCK() pthread_mutex_lock(&se_lock)
#define SLJIT_SE_UNLOCK() pthread_mutex_unlock(&se_lock)
#endif /* !SLJIT_SINGLE_THREADED */
#define check_se_protected(ptr, size) generic_se_protected(ptr, size)
static SLJIT_INLINE int generic_se_protected(void *ptr, sljit_uw size)
{
if (SLJIT_LIKELY(!mprotect(ptr, size, PROT_EXEC)))
return mprotect(ptr, size, PROT_READ | PROT_WRITE);
return -1;
}
#endif /* NetBSD */
#ifndef SLJIT_SE_LOCK
#define SLJIT_SE_LOCK()
#endif
#ifndef SLJIT_SE_UNLOCK
#define SLJIT_SE_UNLOCK()
#endif
#ifndef SLJIT_PROT_WX
#define SLJIT_PROT_WX 0
#endif
SLJIT_API_FUNC_ATTRIBUTE void* sljit_malloc_exec(sljit_uw size)
{
#if !(defined SLJIT_SINGLE_THREADED && SLJIT_SINGLE_THREADED) \
&& !defined(__NetBSD__)
static pthread_mutex_t se_lock = PTHREAD_MUTEX_INITIALIZER;
#endif
static int se_protected = !SLJIT_PROT_WX;
int prot = PROT_READ | PROT_WRITE | SLJIT_PROT_WX;
sljit_uw* ptr;
if (SLJIT_UNLIKELY(se_protected < 0))
return NULL;
#ifdef PROT_MAX
prot |= PROT_MAX(PROT_READ | PROT_WRITE | PROT_EXEC);
#endif
size += sizeof(sljit_uw);
ptr = (sljit_uw*)mmap(NULL, size, prot, MAP_PRIVATE | MAP_ANON, -1, 0);
if (ptr == MAP_FAILED)
return NULL;
if (SLJIT_UNLIKELY(se_protected > 0)) {
SLJIT_SE_LOCK();
se_protected = check_se_protected(ptr, size);
SLJIT_SE_UNLOCK();
if (SLJIT_UNLIKELY(se_protected < 0)) {
munmap((void *)ptr, size);
return NULL;
}
}
*ptr++ = size;
return ptr;
}
#undef SLJIT_PROT_WX
#undef SLJIT_SE_UNLOCK
#undef SLJIT_SE_LOCK
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
{
sljit_uw *start_ptr = ((sljit_uw*)ptr) - 1;
munmap((void*)start_ptr, *start_ptr);
}
static void sljit_update_wx_flags(void *from, void *to, sljit_s32 enable_exec)
{
sljit_uw page_mask = (sljit_uw)get_page_alignment();
sljit_uw start = (sljit_uw)from;
sljit_uw end = (sljit_uw)to;
int prot = PROT_READ | (enable_exec ? PROT_EXEC : PROT_WRITE);
SLJIT_ASSERT(start < end);
start &= ~page_mask;
end = (end + page_mask) & ~page_mask;
mprotect((void*)start, end - start, prot);
}
#else /* windows */
SLJIT_API_FUNC_ATTRIBUTE void* sljit_malloc_exec(sljit_uw size)
{
sljit_uw *ptr;
size += sizeof(sljit_uw);
ptr = (sljit_uw*)VirtualAlloc(NULL, size,
MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
if (!ptr)
return NULL;
*ptr++ = size;
return ptr;
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_exec(void* ptr)
{
sljit_uw start = (sljit_uw)ptr - sizeof(sljit_uw);
#if defined(SLJIT_DEBUG) && SLJIT_DEBUG
sljit_uw page_mask = (sljit_uw)get_page_alignment();
SLJIT_ASSERT(!(start & page_mask));
#endif
VirtualFree((void*)start, 0, MEM_RELEASE);
}
static void sljit_update_wx_flags(void *from, void *to, sljit_s32 enable_exec)
{
DWORD oldprot;
sljit_uw page_mask = (sljit_uw)get_page_alignment();
sljit_uw start = (sljit_uw)from;
sljit_uw end = (sljit_uw)to;
DWORD prot = enable_exec ? PAGE_EXECUTE : PAGE_READWRITE;
SLJIT_ASSERT(start < end);
start &= ~page_mask;
end = (end + page_mask) & ~page_mask;
VirtualProtect((void*)start, end - start, prot, &oldprot);
}
#endif /* !windows */
SLJIT_API_FUNC_ATTRIBUTE void sljit_free_unused_memory_exec(void)
{
/* This allocator does not keep unused memory for future allocations. */
}