undefined asyncify_get_state #7317
Description
Is there currently a recommended way to go about calling asyncify_get_state from inside native code? To manage this with other methods currently I'm doing:
#ifndef ASYNCJMP_SUPPORT_ASYNCIFY_H
#define ASYNCJMP_SUPPORT_ASYNCIFY_H
__attribute__((import_module("asyncify"), import_name("start_unwind"))) void asyncify_start_unwind(void *buf);
#define asyncify_start_unwind(buf) \
do \
{ \
extern void *pl_asyncify_unwind_buf; \
pl_asyncify_unwind_buf = (buf); \
asyncify_start_unwind((buf)); \
} while (0)
__attribute__((import_module("asyncify"), import_name("stop_unwind"))) void asyncify_stop_unwind(void);
#define asyncify_stop_unwind() \
do \
{ \
extern void *pl_asyncify_unwind_buf; \
pl_asyncify_unwind_buf = NULL; \
asyncify_stop_unwind(); \
} while (0)
__attribute__((import_module("asyncify"), import_name("start_rewind"))) void asyncify_start_rewind(void *buf);
__attribute__((import_module("asyncify"), import_name("stop_rewind"))) void asyncify_stop_rewind(void);
__attribute__((import_module("asyncify"), import_name("get_state"))) int asyncify_get_state(void);
#endifWhich all get successfully turned into exports. But for asyncify_get_state the pass raises an error:
"/opt/wasm-opt" zeroperl_unopt -O3 -o zeroperl_unopt
Fatal: call to unidenfied asyncify import: get_state
What I'm trying to achieve:
__attribute__((noinline))
ssize_t __wrap_read(int fd, void *buf, size_t count) {
if (asyncify_get_state() == 2) {
asyncify_stop_rewind();
if (have_saved_result) {
have_saved_result = false;
return saved_result;
}
return -1;
}
ssize_t r = sfs_read(fd, buf, count);
if (r >= 0) {
return r; // Fast path succeeded
}
ssize_t real_val = __real_read(fd, buf, count);
if (asyncify_get_state() == 1) {
saved_result = real_val;
have_saved_result = true;
asyncify_stop_unwind();
return real_val;
}
return real_val;
}I'm using binaryen-version_121
edit:
looking at the pass more closely I can see get_state is missing from here & here, but the documentation says that it should be there