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3746534010
wasm-micro-runtime/core/iwasm/common/wasm_memory.c
liang.he 40c41d5110
Fix several issues reported by oss-fuzz (#3526) 
- possible integer overflow in adjust_table_max_size:
  unsigned integer overflow: 2684354559 * 2 cannot be represented in type 'uint32'
- limit max memory size in wasm_runtime_malloc
- add more checks in aot loader
- adjust compilation options
2024-06-13 16:06:36 +08:00

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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "wasm_runtime_common.h"
#include "../interpreter/wasm_runtime.h"
#include "../aot/aot_runtime.h"
#include "mem_alloc.h"
#include "wasm_memory.h"
#if WASM_ENABLE_SHARED_MEMORY != 0
#include "../common/wasm_shared_memory.h"
#endif
typedef enum Memory_Mode {
MEMORY_MODE_UNKNOWN = 0,
MEMORY_MODE_POOL,
MEMORY_MODE_ALLOCATOR,
MEMORY_MODE_SYSTEM_ALLOCATOR
} Memory_Mode;
static Memory_Mode memory_mode = MEMORY_MODE_UNKNOWN;
static mem_allocator_t pool_allocator = NULL;
static enlarge_memory_error_callback_t enlarge_memory_error_cb;
static void *enlarge_memory_error_user_data;
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
static void *allocator_user_data = NULL;
#endif
static void *(*malloc_func)(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
mem_alloc_usage_t usage,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
void *user_data,
#endif
unsigned int size) = NULL;
static void *(*realloc_func)(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
mem_alloc_usage_t usage, bool full_size_mmaped,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
void *user_data,
#endif
void *ptr, unsigned int size) = NULL;
static void (*free_func)(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
mem_alloc_usage_t usage,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
void *user_data,
#endif
void *ptr) = NULL;
static unsigned int global_pool_size;
static uint64
align_as_and_cast(uint64 size, uint64 alignment)
{
uint64 aligned_size = (size + alignment - 1) & ~(alignment - 1);
return aligned_size;
}
static bool
wasm_memory_init_with_pool(void *mem, unsigned int bytes)
{
mem_allocator_t allocator = mem_allocator_create(mem, bytes);
if (allocator) {
memory_mode = MEMORY_MODE_POOL;
pool_allocator = allocator;
global_pool_size = bytes;
return true;
}
LOG_ERROR("Init memory with pool (%p, %u) failed.\n", mem, bytes);
return false;
}
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
static bool
wasm_memory_init_with_allocator(void *_user_data, void *_malloc_func,
void *_realloc_func, void *_free_func)
{
if (_malloc_func && _free_func && _malloc_func != _free_func) {
memory_mode = MEMORY_MODE_ALLOCATOR;
allocator_user_data = _user_data;
malloc_func = _malloc_func;
realloc_func = _realloc_func;
free_func = _free_func;
return true;
}
LOG_ERROR("Init memory with allocator (%p, %p, %p, %p) failed.\n",
_user_data, _malloc_func, _realloc_func, _free_func);
return false;
}
#else
static bool
wasm_memory_init_with_allocator(void *malloc_func_ptr, void *realloc_func_ptr,
void *free_func_ptr)
{
if (malloc_func_ptr && free_func_ptr && malloc_func_ptr != free_func_ptr) {
memory_mode = MEMORY_MODE_ALLOCATOR;
malloc_func = malloc_func_ptr;
realloc_func = realloc_func_ptr;
free_func = free_func_ptr;
return true;
}
LOG_ERROR("Init memory with allocator (%p, %p, %p) failed.\n",
malloc_func_ptr, realloc_func_ptr, free_func_ptr);
return false;
}
#endif
static inline bool
is_bounds_checks_enabled(WASMModuleInstanceCommon *module_inst)
{
#if WASM_CONFIGURABLE_BOUNDS_CHECKS != 0
if (!module_inst) {
return true;
}
return wasm_runtime_is_bounds_checks_enabled(module_inst);
#else
return true;
#endif
}
bool
wasm_runtime_memory_init(mem_alloc_type_t mem_alloc_type,
const MemAllocOption *alloc_option)
{
if (mem_alloc_type == Alloc_With_Pool) {
return wasm_memory_init_with_pool(alloc_option->pool.heap_buf,
alloc_option->pool.heap_size);
}
else if (mem_alloc_type == Alloc_With_Allocator) {
return wasm_memory_init_with_allocator(
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
alloc_option->allocator.user_data,
#endif
alloc_option->allocator.malloc_func,
alloc_option->allocator.realloc_func,
alloc_option->allocator.free_func);
}
else if (mem_alloc_type == Alloc_With_System_Allocator) {
memory_mode = MEMORY_MODE_SYSTEM_ALLOCATOR;
return true;
}
else {
return false;
}
}
void
wasm_runtime_memory_destroy()
{
if (memory_mode == MEMORY_MODE_POOL) {
#if BH_ENABLE_GC_VERIFY == 0
(void)mem_allocator_destroy(pool_allocator);
#else
int ret = mem_allocator_destroy(pool_allocator);
if (ret != 0) {
/* Memory leak detected */
exit(-1);
}
#endif
}
memory_mode = MEMORY_MODE_UNKNOWN;
}
unsigned
wasm_runtime_memory_pool_size()
{
if (memory_mode == MEMORY_MODE_POOL)
return global_pool_size;
else
return UINT32_MAX;
}
static inline void *
wasm_runtime_malloc_internal(unsigned int size)
{
if (memory_mode == MEMORY_MODE_UNKNOWN) {
LOG_WARNING(
"wasm_runtime_malloc failed: memory hasn't been initialize.\n");
return NULL;
}
else if (memory_mode == MEMORY_MODE_POOL) {
return mem_allocator_malloc(pool_allocator, size);
}
else if (memory_mode == MEMORY_MODE_ALLOCATOR) {
return malloc_func(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
Alloc_For_Runtime,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
allocator_user_data,
#endif
size);
}
else {
return os_malloc(size);
}
}
static inline void *
wasm_runtime_realloc_internal(void *ptr, unsigned int size)
{
if (memory_mode == MEMORY_MODE_UNKNOWN) {
LOG_WARNING(
"wasm_runtime_realloc failed: memory hasn't been initialize.\n");
return NULL;
}
else if (memory_mode == MEMORY_MODE_POOL) {
return mem_allocator_realloc(pool_allocator, ptr, size);
}
else if (memory_mode == MEMORY_MODE_ALLOCATOR) {
if (realloc_func)
return realloc_func(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
Alloc_For_Runtime, false,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
allocator_user_data,
#endif
ptr, size);
else
return NULL;
}
else {
return os_realloc(ptr, size);
}
}
static inline void
wasm_runtime_free_internal(void *ptr)
{
if (!ptr) {
LOG_WARNING("warning: wasm_runtime_free with NULL pointer\n");
#if BH_ENABLE_GC_VERIFY != 0
exit(-1);
#endif
return;
}
if (memory_mode == MEMORY_MODE_UNKNOWN) {
LOG_WARNING("warning: wasm_runtime_free failed: "
"memory hasn't been initialize.\n");
}
else if (memory_mode == MEMORY_MODE_POOL) {
mem_allocator_free(pool_allocator, ptr);
}
else if (memory_mode == MEMORY_MODE_ALLOCATOR) {
free_func(
#if WASM_MEM_ALLOC_WITH_USAGE != 0
Alloc_For_Runtime,
#endif
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
allocator_user_data,
#endif
ptr);
}
else {
os_free(ptr);
}
}
void *
wasm_runtime_malloc(unsigned int size)
{
if (size == 0) {
LOG_WARNING("warning: wasm_runtime_malloc with size zero\n");
/* At lease alloc 1 byte to avoid malloc failed */
size = 1;
#if BH_ENABLE_GC_VERIFY != 0
exit(-1);
#endif
}
#if WASM_ENABLE_FUZZ_TEST != 0
if (size >= WASM_MEM_ALLOC_MAX_SIZE) {
LOG_WARNING("warning: wasm_runtime_malloc with too large size\n");
return NULL;
}
#endif
return wasm_runtime_malloc_internal(size);
}
void *
wasm_runtime_realloc(void *ptr, unsigned int size)
{
return wasm_runtime_realloc_internal(ptr, size);
}
void
wasm_runtime_free(void *ptr)
{
wasm_runtime_free_internal(ptr);
}
bool
wasm_runtime_get_mem_alloc_info(mem_alloc_info_t *mem_alloc_info)
{
if (memory_mode == MEMORY_MODE_POOL) {
return mem_allocator_get_alloc_info(pool_allocator, mem_alloc_info);
}
return false;
}
bool
wasm_runtime_validate_app_addr(WASMModuleInstanceCommon *module_inst_comm,
uint64 app_offset, uint64 size)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint64 max_linear_memory_size = MAX_LINEAR_MEMORY_SIZE;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
if (!is_bounds_checks_enabled(module_inst_comm)) {
return true;
}
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
goto fail;
}
#if WASM_ENABLE_MEMORY64 != 0
if (memory_inst->is_memory64)
max_linear_memory_size = MAX_LINEAR_MEM64_MEMORY_SIZE;
#endif
/* boundary overflow check */
if (size > max_linear_memory_size
|| app_offset > max_linear_memory_size - size) {
goto fail;
}
SHARED_MEMORY_LOCK(memory_inst);
if (app_offset + size <= memory_inst->memory_data_size) {
SHARED_MEMORY_UNLOCK(memory_inst);
return true;
}
SHARED_MEMORY_UNLOCK(memory_inst);
fail:
wasm_set_exception(module_inst, "out of bounds memory access");
return false;
}
bool
wasm_runtime_validate_app_str_addr(WASMModuleInstanceCommon *module_inst_comm,
uint64 app_str_offset)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
uint64 app_end_offset, max_linear_memory_size = MAX_LINEAR_MEMORY_SIZE;
char *str, *str_end;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
if (!is_bounds_checks_enabled(module_inst_comm)) {
return true;
}
if (!wasm_runtime_get_app_addr_range(module_inst_comm, app_str_offset, NULL,
&app_end_offset))
goto fail;
#if WASM_ENABLE_MEMORY64 != 0
if (module_inst->memories[0]->is_memory64)
max_linear_memory_size = MAX_LINEAR_MEM64_MEMORY_SIZE;
#endif
/* boundary overflow check, max start offset can only be size - 1, while end
* offset can be size */
if (app_str_offset >= max_linear_memory_size
|| app_end_offset > max_linear_memory_size)
goto fail;
str = wasm_runtime_addr_app_to_native(module_inst_comm, app_str_offset);
str_end = str + (app_end_offset - app_str_offset);
while (str < str_end && *str != '\0')
str++;
if (str == str_end)
goto fail;
return true;
fail:
wasm_set_exception(module_inst, "out of bounds memory access");
return false;
}
bool
wasm_runtime_validate_native_addr(WASMModuleInstanceCommon *module_inst_comm,
void *native_ptr, uint64 size)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint8 *addr = (uint8 *)native_ptr;
uint64 max_linear_memory_size = MAX_LINEAR_MEMORY_SIZE;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
if (!is_bounds_checks_enabled(module_inst_comm)) {
return true;
}
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
goto fail;
}
#if WASM_ENABLE_MEMORY64 != 0
if (memory_inst->is_memory64)
max_linear_memory_size = MAX_LINEAR_MEM64_MEMORY_SIZE;
#endif
/* boundary overflow check */
if (size > max_linear_memory_size || (uintptr_t)addr > UINTPTR_MAX - size) {
goto fail;
}
SHARED_MEMORY_LOCK(memory_inst);
if (memory_inst->memory_data <= addr
&& addr + size <= memory_inst->memory_data_end) {
SHARED_MEMORY_UNLOCK(memory_inst);
return true;
}
SHARED_MEMORY_UNLOCK(memory_inst);
fail:
wasm_set_exception(module_inst, "out of bounds memory access");
return false;
}
void *
wasm_runtime_addr_app_to_native(WASMModuleInstanceCommon *module_inst_comm,
uint64 app_offset)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint8 *addr;
bool bounds_checks;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
bounds_checks = is_bounds_checks_enabled(module_inst_comm);
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
return NULL;
}
SHARED_MEMORY_LOCK(memory_inst);
addr = memory_inst->memory_data + (uintptr_t)app_offset;
if (bounds_checks) {
if (memory_inst->memory_data <= addr
&& addr < memory_inst->memory_data_end) {
SHARED_MEMORY_UNLOCK(memory_inst);
return addr;
}
SHARED_MEMORY_UNLOCK(memory_inst);
return NULL;
}
/* If bounds checks is disabled, return the address directly */
SHARED_MEMORY_UNLOCK(memory_inst);
return addr;
}
uint64
wasm_runtime_addr_native_to_app(WASMModuleInstanceCommon *module_inst_comm,
void *native_ptr)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint8 *addr = (uint8 *)native_ptr;
bool bounds_checks;
uint64 ret;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
bounds_checks = is_bounds_checks_enabled(module_inst_comm);
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
return 0;
}
SHARED_MEMORY_LOCK(memory_inst);
if (bounds_checks) {
if (memory_inst->memory_data <= addr
&& addr < memory_inst->memory_data_end) {
ret = (uint64)(addr - memory_inst->memory_data);
SHARED_MEMORY_UNLOCK(memory_inst);
return ret;
}
}
/* If bounds checks is disabled, return the offset directly */
else if (addr != NULL) {
ret = (uint64)(addr - memory_inst->memory_data);
SHARED_MEMORY_UNLOCK(memory_inst);
return ret;
}
SHARED_MEMORY_UNLOCK(memory_inst);
return 0;
}
bool
wasm_runtime_get_app_addr_range(WASMModuleInstanceCommon *module_inst_comm,
uint64 app_offset, uint64 *p_app_start_offset,
uint64 *p_app_end_offset)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint64 memory_data_size;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
return false;
}
SHARED_MEMORY_LOCK(memory_inst);
memory_data_size = memory_inst->memory_data_size;
if (app_offset < memory_data_size) {
if (p_app_start_offset)
*p_app_start_offset = 0;
if (p_app_end_offset)
*p_app_end_offset = memory_data_size;
SHARED_MEMORY_UNLOCK(memory_inst);
return true;
}
SHARED_MEMORY_UNLOCK(memory_inst);
return false;
}
bool
wasm_runtime_get_native_addr_range(WASMModuleInstanceCommon *module_inst_comm,
uint8 *native_ptr,
uint8 **p_native_start_addr,
uint8 **p_native_end_addr)
{
WASMModuleInstance *module_inst = (WASMModuleInstance *)module_inst_comm;
WASMMemoryInstance *memory_inst;
uint8 *addr = (uint8 *)native_ptr;
bh_assert(module_inst_comm->module_type == Wasm_Module_Bytecode
|| module_inst_comm->module_type == Wasm_Module_AoT);
memory_inst = wasm_get_default_memory(module_inst);
if (!memory_inst) {
return false;
}
SHARED_MEMORY_LOCK(memory_inst);
if (memory_inst->memory_data <= addr
&& addr < memory_inst->memory_data_end) {
if (p_native_start_addr)
*p_native_start_addr = memory_inst->memory_data;
if (p_native_end_addr)
*p_native_end_addr = memory_inst->memory_data_end;
SHARED_MEMORY_UNLOCK(memory_inst);
return true;
}
SHARED_MEMORY_UNLOCK(memory_inst);
return false;
}
bool
wasm_check_app_addr_and_convert(WASMModuleInstance *module_inst, bool is_str,
uint64 app_buf_addr, uint64 app_buf_size,
void **p_native_addr)
{
WASMMemoryInstance *memory_inst = wasm_get_default_memory(module_inst);
uint8 *native_addr;
bool bounds_checks;
bh_assert(app_buf_addr <= UINTPTR_MAX && app_buf_size <= UINTPTR_MAX);
if (!memory_inst) {
wasm_set_exception(module_inst, "out of bounds memory access");
return false;
}
native_addr = memory_inst->memory_data + (uintptr_t)app_buf_addr;
bounds_checks = is_bounds_checks_enabled((wasm_module_inst_t)module_inst);
if (!bounds_checks) {
if (app_buf_addr == 0) {
native_addr = NULL;
}
goto success;
}
/* No need to check the app_offset and buf_size if memory access
boundary check with hardware trap is enabled */
#ifndef OS_ENABLE_HW_BOUND_CHECK
SHARED_MEMORY_LOCK(memory_inst);
if (app_buf_addr >= memory_inst->memory_data_size) {
goto fail;
}
if (!is_str) {
if (app_buf_size > memory_inst->memory_data_size - app_buf_addr) {
goto fail;
}
}
else {
const char *str, *str_end;
/* The whole string must be in the linear memory */
str = (const char *)native_addr;
str_end = (const char *)memory_inst->memory_data_end;
while (str < str_end && *str != '\0')
str++;
if (str == str_end)
goto fail;
}
SHARED_MEMORY_UNLOCK(memory_inst);
#endif
success:
*p_native_addr = (void *)native_addr;
return true;
#ifndef OS_ENABLE_HW_BOUND_CHECK
fail:
SHARED_MEMORY_UNLOCK(memory_inst);
wasm_set_exception(module_inst, "out of bounds memory access");
return false;
#endif
}
WASMMemoryInstance *
wasm_get_default_memory(WASMModuleInstance *module_inst)
{
if (module_inst->memories)
return module_inst->memories[0];
else
return NULL;
}
void
wasm_runtime_set_mem_bound_check_bytes(WASMMemoryInstance *memory,
uint64 memory_data_size)
{
#if WASM_ENABLE_FAST_JIT != 0 || WASM_ENABLE_JIT != 0 || WASM_ENABLE_AOT != 0
#if UINTPTR_MAX == UINT64_MAX
memory->mem_bound_check_1byte.u64 = memory_data_size - 1;
memory->mem_bound_check_2bytes.u64 = memory_data_size - 2;
memory->mem_bound_check_4bytes.u64 = memory_data_size - 4;
memory->mem_bound_check_8bytes.u64 = memory_data_size - 8;
memory->mem_bound_check_16bytes.u64 = memory_data_size - 16;
#else
memory->mem_bound_check_1byte.u32[0] = (uint32)memory_data_size - 1;
memory->mem_bound_check_2bytes.u32[0] = (uint32)memory_data_size - 2;
memory->mem_bound_check_4bytes.u32[0] = (uint32)memory_data_size - 4;
memory->mem_bound_check_8bytes.u32[0] = (uint32)memory_data_size - 8;
memory->mem_bound_check_16bytes.u32[0] = (uint32)memory_data_size - 16;
#endif
#endif
}
static void
wasm_munmap_linear_memory(void *mapped_mem, uint64 commit_size, uint64 map_size)
{
#ifdef BH_PLATFORM_WINDOWS
os_mem_decommit(mapped_mem, commit_size);
#else
(void)commit_size;
#endif
os_munmap(mapped_mem, map_size);
}
static void *
wasm_mremap_linear_memory(void *mapped_mem, uint64 old_size, uint64 new_size,
uint64 commit_size)
{
void *new_mem;
bh_assert(new_size > 0);
bh_assert(new_size > old_size);
if (mapped_mem) {
new_mem = os_mremap(mapped_mem, old_size, new_size);
}
else {
new_mem = os_mmap(NULL, new_size, MMAP_PROT_NONE, MMAP_MAP_NONE,
os_get_invalid_handle());
}
if (!new_mem) {
return NULL;
}
#ifdef BH_PLATFORM_WINDOWS
if (commit_size > 0
&& !os_mem_commit(new_mem, commit_size,
MMAP_PROT_READ | MMAP_PROT_WRITE)) {
os_munmap(new_mem, new_size);
return NULL;
}
#endif
if (os_mprotect(new_mem, commit_size, MMAP_PROT_READ | MMAP_PROT_WRITE)
!= 0) {
wasm_munmap_linear_memory(new_mem, new_size, new_size);
return NULL;
}
return new_mem;
}
static void *
wasm_mmap_linear_memory(uint64_t map_size, uint64 commit_size)
{
return wasm_mremap_linear_memory(NULL, 0, map_size, commit_size);
}
bool
wasm_enlarge_memory_internal(WASMModuleInstance *module, uint32 inc_page_count)
{
WASMMemoryInstance *memory = wasm_get_default_memory(module);
uint8 *memory_data_old, *memory_data_new, *heap_data_old;
uint32 num_bytes_per_page, heap_size;
uint32 cur_page_count, max_page_count, total_page_count;
uint64 total_size_old = 0, total_size_new;
bool ret = true, full_size_mmaped;
enlarge_memory_error_reason_t failure_reason = INTERNAL_ERROR;
if (!memory) {
ret = false;
goto return_func;
}
#ifdef OS_ENABLE_HW_BOUND_CHECK
full_size_mmaped = true;
#elif WASM_ENABLE_SHARED_MEMORY != 0
full_size_mmaped = shared_memory_is_shared(memory);
#else
full_size_mmaped = false;
#endif
memory_data_old = memory->memory_data;
total_size_old = memory->memory_data_size;
heap_data_old = memory->heap_data;
heap_size = (uint32)(memory->heap_data_end - memory->heap_data);
num_bytes_per_page = memory->num_bytes_per_page;
cur_page_count = memory->cur_page_count;
max_page_count = memory->max_page_count;
total_page_count = inc_page_count + cur_page_count;
total_size_new = num_bytes_per_page * (uint64)total_page_count;
if (inc_page_count <= 0)
/* No need to enlarge memory */
return true;
if (total_page_count < cur_page_count) { /* integer overflow */
ret = false;
goto return_func;
}
if (total_page_count > max_page_count) {
failure_reason = MAX_SIZE_REACHED;
ret = false;
goto return_func;
}
bh_assert(total_size_new
<= GET_MAX_LINEAR_MEMORY_SIZE(memory->is_memory64));
#if WASM_MEM_ALLOC_WITH_USAGE != 0
if (!(memory_data_new =
realloc_func(Alloc_For_LinearMemory, full_size_mmaped,
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
NULL,
#endif
memory_data_old, total_size_new))) {
ret = false;
goto return_func;
}
if (heap_size > 0) {
if (mem_allocator_migrate(memory->heap_handle,
(char *)heap_data_old
+ (memory_data_new - memory_data_old),
heap_size)
!= 0) {
ret = false;
}
}
memory->heap_data = memory_data_new + (heap_data_old - memory_data_old);
memory->heap_data_end = memory->heap_data + heap_size;
memory->memory_data = memory_data_new;
#else
if (full_size_mmaped) {
#ifdef BH_PLATFORM_WINDOWS
if (!os_mem_commit(memory->memory_data_end,
(mem_offset_t)(total_size_new - total_size_old),
MMAP_PROT_READ | MMAP_PROT_WRITE)) {
ret = false;
goto return_func;
}
#endif
if (os_mprotect(memory->memory_data_end,
(mem_offset_t)(total_size_new - total_size_old),
MMAP_PROT_READ | MMAP_PROT_WRITE)
!= 0) {
#ifdef BH_PLATFORM_WINDOWS
os_mem_decommit(memory->memory_data_end,
(mem_offset_t)(total_size_new - total_size_old));
#endif
ret = false;
goto return_func;
}
}
else {
if (heap_size > 0) {
if (mem_allocator_is_heap_corrupted(memory->heap_handle)) {
wasm_runtime_show_app_heap_corrupted_prompt();
ret = false;
goto return_func;
}
}
if (!(memory_data_new =
wasm_mremap_linear_memory(memory_data_old, total_size_old,
total_size_new, total_size_new))) {
ret = false;
goto return_func;
}
if (heap_size > 0) {
if (mem_allocator_migrate(memory->heap_handle,
(char *)heap_data_old
+ (memory_data_new - memory_data_old),
heap_size)
!= 0) {
/* Don't return here as memory->memory_data is obsolete and
must be updated to be correctly used later. */
ret = false;
}
}
memory->heap_data = memory_data_new + (heap_data_old - memory_data_old);
memory->heap_data_end = memory->heap_data + heap_size;
memory->memory_data = memory_data_new;
#if defined(os_writegsbase)
/* write base addr of linear memory to GS segment register */
os_writegsbase(memory_data_new);
#endif
}
#endif /* end of WASM_MEM_ALLOC_WITH_USAGE */
memory->num_bytes_per_page = num_bytes_per_page;
memory->cur_page_count = total_page_count;
memory->max_page_count = max_page_count;
SET_LINEAR_MEMORY_SIZE(memory, total_size_new);
memory->memory_data_end = memory->memory_data + total_size_new;
wasm_runtime_set_mem_bound_check_bytes(memory, total_size_new);
return_func:
if (!ret && enlarge_memory_error_cb) {
WASMExecEnv *exec_env = NULL;
#if WASM_ENABLE_INTERP != 0
if (module->module_type == Wasm_Module_Bytecode)
exec_env = ((WASMModuleInstance *)module)->cur_exec_env;
#endif
#if WASM_ENABLE_AOT != 0
if (module->module_type == Wasm_Module_AoT)
exec_env = ((AOTModuleInstance *)module)->cur_exec_env;
#endif
enlarge_memory_error_cb(inc_page_count, total_size_old, 0,
failure_reason,
(WASMModuleInstanceCommon *)module, exec_env,
enlarge_memory_error_user_data);
}
return ret;
}
void
wasm_runtime_set_enlarge_mem_error_callback(
const enlarge_memory_error_callback_t callback, void *user_data)
{
enlarge_memory_error_cb = callback;
enlarge_memory_error_user_data = user_data;
}
bool
wasm_enlarge_memory(WASMModuleInstance *module, uint32 inc_page_count)
{
bool ret = false;
#if WASM_ENABLE_SHARED_MEMORY != 0
if (module->memory_count > 0)
shared_memory_lock(module->memories[0]);
#endif
ret = wasm_enlarge_memory_internal(module, inc_page_count);
#if WASM_ENABLE_SHARED_MEMORY != 0
if (module->memory_count > 0)
shared_memory_unlock(module->memories[0]);
#endif
return ret;
}
void
wasm_deallocate_linear_memory(WASMMemoryInstance *memory_inst)
{
uint64 map_size;
bh_assert(memory_inst);
bh_assert(memory_inst->memory_data);
#ifndef OS_ENABLE_HW_BOUND_CHECK
#if WASM_ENABLE_SHARED_MEMORY != 0
if (shared_memory_is_shared(memory_inst)) {
map_size = (uint64)memory_inst->num_bytes_per_page
* memory_inst->max_page_count;
}
else
#endif
{
map_size = (uint64)memory_inst->num_bytes_per_page
* memory_inst->cur_page_count;
}
#else
map_size = 8 * (uint64)BH_GB;
#endif
#if WASM_MEM_ALLOC_WITH_USAGE != 0
(void)map_size;
free_func(Alloc_For_LinearMemory,
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
NULL,
#endif
memory_inst->memory_data);
#else
wasm_munmap_linear_memory(memory_inst->memory_data,
memory_inst->memory_data_size, map_size);
#endif
memory_inst->memory_data = NULL;
}
int
wasm_allocate_linear_memory(uint8 **data, bool is_shared_memory,
bool is_memory64, uint64 num_bytes_per_page,
uint64 init_page_count, uint64 max_page_count,
uint64 *memory_data_size)
{
uint64 map_size, page_size;
bh_assert(data);
bh_assert(memory_data_size);
#ifndef OS_ENABLE_HW_BOUND_CHECK
#if WASM_ENABLE_SHARED_MEMORY != 0
if (is_shared_memory) {
/* Allocate maximum memory size when memory is shared */
map_size = max_page_count * num_bytes_per_page;
}
else
#endif
{
map_size = init_page_count * num_bytes_per_page;
}
#else /* else of OS_ENABLE_HW_BOUND_CHECK */
/* Totally 8G is mapped, the opcode load/store address range is 0 to 8G:
* ea = i + memarg.offset
* both i and memarg.offset are u32 in range 0 to 4G
* so the range of ea is 0 to 8G
*/
map_size = 8 * (uint64)BH_GB;
#endif /* end of OS_ENABLE_HW_BOUND_CHECK */
page_size = os_getpagesize();
*memory_data_size = init_page_count * num_bytes_per_page;
bh_assert(*memory_data_size <= GET_MAX_LINEAR_MEMORY_SIZE(is_memory64));
*memory_data_size = align_as_and_cast(*memory_data_size, page_size);
if (map_size > 0) {
#if WASM_MEM_ALLOC_WITH_USAGE != 0
(void)wasm_mmap_linear_memory;
if (!(*data = malloc_func(Alloc_For_LinearMemory,
#if WASM_MEM_ALLOC_WITH_USER_DATA != 0
NULL,
#endif
*memory_data_size))) {
return BHT_ERROR;
}
#else
if (!(*data = wasm_mmap_linear_memory(map_size, *memory_data_size))) {
return BHT_ERROR;
}
#endif
}
return BHT_OK;
}
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