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#include "rust_internal.h"
#include "memory_region.h"
// NB: please do not commit code with this uncommented. It's
// hugely expensive and should only be used as a last resort.
//
// #define TRACK_ALLOCATIONS
memory_region::memory_region(rust_srv *srv, bool synchronized) :
_srv(srv), _parent(NULL), _live_allocations(0),
_detailed_leaks(getenv("RUST_DETAILED_LEAKS") != NULL),
_synchronized(synchronized) {
}
memory_region::memory_region(memory_region *parent) :
_srv(parent->_srv), _parent(parent), _live_allocations(0),
_detailed_leaks(parent->_detailed_leaks),
_synchronized(parent->_synchronized) {
}
void memory_region::add_alloc() {
//_live_allocations++;
sync::increment(_live_allocations);
}
void memory_region::dec_alloc() {
//_live_allocations--;
sync::decrement(_live_allocations);
}
void memory_region::free(void *mem) {
// printf("free: ptr 0x%" PRIxPTR" region=%p\n", (uintptr_t) mem, this);
if (!mem) { return; }
if (_synchronized) { _lock.lock(); }
#ifdef TRACK_ALLOCATIONS
int index = ((int *)mem)[-1];
if (_allocation_list[index] != (uint8_t *)mem - sizeof(int)) {
printf("free: ptr 0x%" PRIxPTR " is not in allocation_list\n",
(uintptr_t) mem);
_srv->fatal("not in allocation_list", __FILE__, __LINE__, "");
}
else {
// printf("freed index %d\n", index);
_allocation_list[index] = NULL;
}
mem = (void*)((uint8_t*)mem - sizeof(int));
#endif
if (_live_allocations < 1) {
_srv->fatal("live_allocs < 1", __FILE__, __LINE__, "");
}
dec_alloc();
_srv->free(mem);
if (_synchronized) { _lock.unlock(); }
}
void *
memory_region::realloc(void *mem, size_t size) {
if (_synchronized) { _lock.lock(); }
if (!mem) {
add_alloc();
}
#ifdef TRACK_ALLOCATIONS
size += sizeof(int);
mem = (void*)((uint8_t*)mem - sizeof(int));
int index = *(int *)mem;
#endif
void *newMem = _srv->realloc(mem, size);
#ifdef TRACK_ALLOCATIONS
if (_allocation_list[index] != mem) {
printf("at index %d, found %p, expected %p\n",
index, _allocation_list[index], mem);
printf("realloc: ptr 0x%" PRIxPTR " is not in allocation_list\n",
(uintptr_t) mem);
_srv->fatal("not in allocation_list", __FILE__, __LINE__, "");
}
else {
_allocation_list[index] = newMem;
(*(int*)newMem) = index;
// printf("realloc: stored %p at index %d, replacing %p\n",
// newMem, index, mem);
}
#endif
if (_synchronized) { _lock.unlock(); }
#ifdef TRACK_ALLOCATIONS
newMem = (void *)((uint8_t*)newMem + sizeof(int));
#endif
return newMem;
}
void *
memory_region::malloc(size_t size) {
if (_synchronized) { _lock.lock(); }
add_alloc();
#ifdef TRACK_ALLOCATIONS
size += sizeof(int);
#endif
void *mem = _srv->malloc(size);
#ifdef TRACK_ALLOCATIONS
int index = _allocation_list.append(mem);
int *p = (int *)mem;
*p = index;
// printf("malloc: stored %p at index %d\n", mem, index);
#endif
// printf("malloc: ptr 0x%" PRIxPTR " region=%p\n",
// (uintptr_t) mem, this);
if (_synchronized) { _lock.unlock(); }
#ifdef TRACK_ALLOCATIONS
mem = (void*)((uint8_t*)mem + sizeof(int));
#endif
return mem;
}
void *
memory_region::calloc(size_t size) {
if (_synchronized) { _lock.lock(); }
add_alloc();
#ifdef TRACK_ALLOCATIONS
size += sizeof(int);
#endif
void *mem = _srv->malloc(size);
memset(mem, 0, size);
#ifdef TRACK_ALLOCATIONS
int index = _allocation_list.append(mem);
int *p = (int *)mem;
*p = index;
// printf("calloc: stored %p at index %d\n", mem, index);
#endif
if (_synchronized) { _lock.unlock(); }
#ifdef TRACK_ALLOCATIONS
mem = (void*)((uint8_t*)mem + sizeof(int));
#endif
return mem;
}
memory_region::~memory_region() {
if (_synchronized) { _lock.lock(); }
if (_live_allocations == 0) {
if (_synchronized) { _lock.unlock(); }
return;
}
char msg[128];
snprintf(msg, sizeof(msg),
"leaked memory in rust main loop (%" PRIuPTR " objects)",
_live_allocations);
#ifdef TRACK_ALLOCATIONS
if (_detailed_leaks) {
for (size_t i = 0; i < _allocation_list.size(); i++) {
if (_allocation_list[i] != NULL) {
printf("allocation 0x%" PRIxPTR " was not freed\n",
(uintptr_t) _allocation_list[i]);
}
}
}
#endif
_srv->fatal(msg, __FILE__, __LINE__, "%d objects", _live_allocations);
if (_synchronized) { _lock.unlock(); }
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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