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fix: cast file descriptor to size_t for comparison in fd_prestats functions (#4582)

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```
comparison of integer expressions of different signedness:
  ‘__wasi_fd_t’ {aka ‘int’} and ‘size_t’ {aka ‘long unsigned int’}
  [-Werror=sign-compare]
  288 |     if (fd >= pt->size)
```
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liang.he 2025-08-27 07:15:08 +08:00 committed by GitHub
parent 0b97d0cb14
commit 9cb1cc4af6
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1 changed files with 3 additions and 3 deletions
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6
core/iwasm/libraries/libc-wasi/sandboxed-system-primitives/src/posix.c
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@ -285,7 +285,7 @@ fd_prestats_get_entry(struct fd_prestats *pt, __wasi_fd_t fd,
struct fd_prestat **ret) REQUIRES_SHARED(pt->lock)
{
// Test for file descriptor existence.
if (fd >= pt->size)
if ((size_t)fd >= pt->size)
return __WASI_EBADF;
struct fd_prestat *prestat = &pt->prestats[fd];
if (prestat->dir == NULL)
@ -301,7 +301,7 @@ static __wasi_errno_t
fd_prestats_remove_entry(struct fd_prestats *pt, __wasi_fd_t fd)
{
// Test for file descriptor existence.
if (fd >= pt->size)
if ((size_t)fd >= pt->size)
return __WASI_EBADF;
struct fd_prestat *prestat = &pt->prestats[fd];
@ -356,7 +356,7 @@ fd_table_get_entry(struct fd_table *ft, __wasi_fd_t fd,
REQUIRES_SHARED(ft->lock)
{
// Test for file descriptor existence.
if (fd >= ft->size) {
if ((size_t)fd >= ft->size) {
return __WASI_EBADF;
}