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Add checks to avoid wasm_runtime_malloc memory with size 0 (#507)

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In some platforms, allocating memory with size 0 may return NULL but not an empty memory block, which causes runtime load, instantiate or execute wasm/aot file failed. We add checks to try to avoid allocating memory in runtime if the size is 0. And in wasm_runtime_malloc/free, output warning if allocate memory with size 0 and free memory with NULL ptr.
Also fix some coding style issues, fix handle riscv32 ilp32d issue, and fix several wasm-c-api issues.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>
This commit is contained in:
Wenyong Huang
2021-01-28 02:16:02 -06:00
committed by GitHub
parent efd648959c
commit a5188f5574
20 changed files with 240 additions and 131 deletions
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14
core/shared/utils/uncommon/bh_read_file.c
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@ -14,7 +14,7 @@ bh_read_file_to_buffer(const char *filename, uint32 *ret_size)
{
char *buffer;
int file;
uint32 file_size, read_size;
uint32 file_size, buf_size, read_size;
struct stat stat_buf;
if (!filename || !ret_size) {
@ -36,7 +36,10 @@ bh_read_file_to_buffer(const char *filename, uint32 *ret_size)
}
file_size = (uint32)stat_buf.st_size;
if (!(buffer = (char *)BH_MALLOC(file_size))) {
/* At lease alloc 1 byte to avoid malloc failed */
buf_size = file_size > 0 ? file_size : 1;
if (!(buffer = (char *)BH_MALLOC(buf_size))) {
printf("Read file to buffer failed: alloc memory failed.\n");
_close(file);
return NULL;
@ -63,7 +66,7 @@ bh_read_file_to_buffer(const char *filename, uint32 *ret_size)
{
char *buffer;
int file;
uint32 file_size, read_size;
uint32 file_size, buf_size, read_size;
struct stat stat_buf;
if (!filename || !ret_size) {
@ -86,7 +89,10 @@ bh_read_file_to_buffer(const char *filename, uint32 *ret_size)
file_size = (uint32)stat_buf.st_size;
if (!(buffer = BH_MALLOC(file_size))) {
/* At lease alloc 1 byte to avoid malloc failed */
buf_size = file_size > 0 ? file_size : 1;
if (!(buffer = BH_MALLOC(buf_size))) {
printf("Read file to buffer failed: alloc memory failed.\n");
close(file);
return NULL;