errno != EINVAL;
}
-void qemu_prealloc_mem(int fd, char *area, size_t sz, int max_threads,
+bool qemu_prealloc_mem(int fd, char *area, size_t sz, int max_threads,
ThreadContext *tc, Error **errp)
{
static gsize initialized;
size_t numpages = DIV_ROUND_UP(sz, hpagesize);
bool use_madv_populate_write;
struct sigaction act;
+ bool rv = true;
/*
* Sense on every invocation, as MADV_POPULATE_WRITE cannot be used for
qemu_mutex_unlock(&sigbus_mutex);
error_setg_errno(errp, errno,
"qemu_prealloc_mem: failed to install signal handler");
- return;
+ return false;
}
}
if (ret) {
error_setg_errno(errp, -ret,
"qemu_prealloc_mem: preallocating memory failed");
+ rv = false;
}
if (!use_madv_populate_write) {
}
qemu_mutex_unlock(&sigbus_mutex);
}
+ return rv;
}
char *qemu_get_pid_name(pid_t pid)
void *qemu_alloc_stack(size_t *sz)
{
- void *ptr, *guardpage;
+ void *ptr;
int flags;
#ifdef CONFIG_DEBUG_STACK_USAGE
void *ptr2;
abort();
}
-#if defined(HOST_IA64)
- /* separate register stack */
- guardpage = ptr + (((*sz - pagesz) / 2) & ~pagesz);
-#elif defined(HOST_HPPA)
- /* stack grows up */
- guardpage = ptr + *sz - pagesz;
-#else
- /* stack grows down */
- guardpage = ptr;
-#endif
- if (mprotect(guardpage, pagesz, PROT_NONE) != 0) {
+ /* Stack grows down -- guard page at the bottom. */
+ if (mprotect(ptr, pagesz, PROT_NONE) != 0) {
perror("failed to set up stack guard page");
abort();
}