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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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3
core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
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@ -1652,7 +1652,8 @@ static __wasi_errno_t path_get_nofollow(
static void path_put(
struct path_access *pa
) UNLOCKS(pa->fd_object->refcount) {
wasm_runtime_free(pa->path_start);
if (pa->path_start)
wasm_runtime_free(pa->path_start);
if (fd_number(pa->fd_object) != pa->fd)
close(pa->fd);
fd_object_release(pa->fd_object);