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#include <dlfcn.h>
#include <stdlib.h>
#include <stdarg.h>
#include "pthread_impl.h"
#include "dynlink.h"
#include "libc.h"
char *dlerror()
{
pthread_t self = __pthread_self();
if (!self->dlerror_flag) return 0;
self->dlerror_flag = 0;
char *s = self->dlerror_buf;
if (s == (void *)-1)
return "Dynamic linker failed to allocate memory for error message";
else
return s;
}
void __dl_thread_cleanup(void)
{
pthread_t self = __pthread_self();
if (self->dlerror_buf != (void *)-1)
free(self->dlerror_buf);
}
hidden void __dl_vseterr(const char *fmt, va_list ap)
{
va_list ap2;
va_copy(ap2, ap);
pthread_t self = __pthread_self();
if (self->dlerror_buf != (void *)-1)
free(self->dlerror_buf);
size_t len = vsnprintf(0, 0, fmt, ap2);
va_end(ap2);
char *buf = malloc(len+1);
if (buf) {
vsnprintf(buf, len+1, fmt, ap);
} else {
buf = (void *)-1;
}
self->dlerror_buf = buf;
self->dlerror_flag = 1;
}
hidden void __dl_seterr(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
__dl_vseterr(fmt, ap);
va_end(ap);
}
static int stub_invalid_handle(void *h)
{
__dl_seterr("Invalid library handle %p", (void *)h);
return 1;
}
weak_alias(stub_invalid_handle, __dl_invalid_handle);
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