int32
runtime·mlookup(void *v, byte **base, uintptr *size, MSpan **sp)
{
uintptr n, i;
byte *p;
MSpan *s;
g->m->mcache->local_nlookup++;
if (sizeof(void*) == 4 && g->m->mcache->local_nlookup >= (1<<30)) {
// purge cache stats to prevent overflow
runtime·lock(&runtime·mheap.lock);
runtime·purgecachedstats(g->m->mcache);
runtime·unlock(&runtime·mheap.lock);
}
s = runtime·MHeap_LookupMaybe(&runtime·mheap, v);
if(sp)
*sp = s;
if(s == nil) {
if(base)
*base = nil;
if(size)
*size = 0;
return 0;
}
p = (byte*)((uintptr)s->start<<PageShift);
if(s->sizeclass == 0) {
// Large object.
if(base)
*base = p;
if(size)
*size = s->npages<<PageShift;
return 1;
}
n = s->elemsize;
if(base) {
i = ((byte*)v - p)/n;
*base = p + i*n;
}
if(size)
*size = n;
return 1;
}
int32
runtime·mlookup ( void *v , byte **base , uintptr *size , MSpan **sp )
{
uintptr n , i;
byte *p;
MSpan *s;
#line 2214 "C:\Go\src\pkg\runtime\malloc.goc"
m->mcache->local_nlookup++;
s = runtime·MHeap_LookupMaybe ( &runtime·mheap , v ) ;
if ( sp )
*sp = s;
if ( s == nil ) {
runtime·checkfreed ( v , 1 ) ;
if ( base )
*base = nil;
if ( size )
*size = 0;
return 0;
}
#line 2227 "C:\Go\src\pkg\runtime\malloc.goc"
p = ( byte* ) ( ( uintptr ) s->start<<PageShift ) ;
if ( s->sizeclass == 0 ) {
#line 2230 "C:\Go\src\pkg\runtime\malloc.goc"
if ( base )
*base = p;
if ( size )
*size = s->npages<<PageShift;
return 1;
}
#line 2237 "C:\Go\src\pkg\runtime\malloc.goc"
if ( ( byte* ) v >= ( byte* ) s->limit ) {
#line 2239 "C:\Go\src\pkg\runtime\malloc.goc"
return 0;
}
#line 2242 "C:\Go\src\pkg\runtime\malloc.goc"
n = runtime·class_to_size[s->sizeclass];
if ( base ) {
i = ( ( byte* ) v - p ) /n;
*base = p + i*n;
}
if ( size )
*size = n;
#line 2250 "C:\Go\src\pkg\runtime\malloc.goc"
return 1;
}
