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Revert "Fix jump buffer leak in setjmp handler in WASI builds"

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This reverts the following commits as it's causing OOM in some cases in
ruby/ruby.wasm test suite.
* 372515f33c908b36b3f5fbd2edcb34c69b418500
* 3a730be8b464454878a42132f6fecb98ab4c1b5b
This commit is contained in:
Yuta Saito 2025-04-01 11:01:49 +00:00
parent a671b25525
commit 30e5e7c005
Notes: git 2025-04-01 16:11:17 +00:00 
Merged: https://github.com/ruby/ruby/pull/13026
2 changed files with 29 additions and 56 deletions
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4
eval_intern.h
View File

@ -102,11 +102,11 @@ extern int select_large_fdset(int, fd_set *, fd_set *, fd_set *, struct timeval
_tag.tag = Qundef; \
_tag.prev = _ec->tag; \
_tag.lock_rec = rb_ec_vm_lock_rec(_ec); \
rb_vm_tag_jmpbuf_init(&_tag);
rb_vm_tag_jmpbuf_init(&_tag.buf); \
#define EC_POP_TAG() \
_ec->tag = _tag.prev; \
rb_vm_tag_jmpbuf_deinit(&_tag); \
rb_vm_tag_jmpbuf_deinit(&_tag.buf); \
} while (0)
#define EC_TMPPOP_TAG() \

81
vm_core.h
View File

@ -946,16 +946,37 @@ typedef void *rb_jmpbuf_t[5];
Therefore, we allocates the buffer on the heap on such
environments.
*/
typedef struct _rb_vm_tag_jmpbuf {
struct _rb_vm_tag_jmpbuf *next;
rb_jmpbuf_t buf;
} *rb_vm_tag_jmpbuf_t;
typedef rb_jmpbuf_t *rb_vm_tag_jmpbuf_t;
#define RB_VM_TAG_JMPBUF_GET(jmpbuf) ((jmpbuf)->buf)
#define RB_VM_TAG_JMPBUF_GET(buf) (*buf)
static inline void
rb_vm_tag_jmpbuf_init(rb_vm_tag_jmpbuf_t *jmpbuf)
{
*jmpbuf = ruby_xmalloc(sizeof(rb_jmpbuf_t));
}
static inline void
rb_vm_tag_jmpbuf_deinit(const rb_vm_tag_jmpbuf_t *jmpbuf)
{
ruby_xfree(*jmpbuf);
}
#else
typedef rb_jmpbuf_t rb_vm_tag_jmpbuf_t;
#define RB_VM_TAG_JMPBUF_GET(jmpbuf) (jmpbuf)
#define RB_VM_TAG_JMPBUF_GET(buf) (buf)
static inline void
rb_vm_tag_jmpbuf_init(rb_vm_tag_jmpbuf_t *jmpbuf)
{
// no-op
}
static inline void
rb_vm_tag_jmpbuf_deinit(const rb_vm_tag_jmpbuf_t *jmpbuf)
{
// no-op
}
#endif
/*
@ -971,54 +992,6 @@ struct rb_vm_tag {
unsigned int lock_rec;
};
#if defined(__wasm__) && !defined(__EMSCRIPTEN__)
static inline void
_rb_vm_tag_jmpbuf_deinit_internal(rb_vm_tag_jmpbuf_t jmpbuf)
{
rb_vm_tag_jmpbuf_t buf = jmpbuf;
while (buf != NULL) {
rb_vm_tag_jmpbuf_t next = buf->next;
ruby_xfree(buf);
buf = next;
}
}
static inline void
rb_vm_tag_jmpbuf_init(struct rb_vm_tag *tag)
{
if (tag->prev != NULL && tag->prev->buf->next != NULL) {
_rb_vm_tag_jmpbuf_deinit_internal(tag->prev->buf->next);
tag->prev->buf->next = NULL;
}
tag->buf = ruby_xmalloc(sizeof *tag->buf);
tag->buf->next = NULL;
if (tag->prev != NULL) {
tag->prev->buf->next = tag->buf;
}
}
static inline void
rb_vm_tag_jmpbuf_deinit(struct rb_vm_tag *tag)
{
if (tag->prev != NULL) {
tag->prev->buf->next = NULL;
}
_rb_vm_tag_jmpbuf_deinit_internal(tag->buf);
}
#else
static inline void
rb_vm_tag_jmpbuf_init(struct rb_vm_tag *tag)
{
// no-op
}
static inline void
rb_vm_tag_jmpbuf_deinit(struct rb_vm_tag *tag)
{
// no-op
}
#endif
STATIC_ASSERT(rb_vm_tag_buf_offset, offsetof(struct rb_vm_tag, buf) > 0);
STATIC_ASSERT(rb_vm_tag_buf_end,
offsetof(struct rb_vm_tag, buf) + sizeof(rb_vm_tag_jmpbuf_t) <