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Annotation of parser3/src/main/pa_memory.C, revision 1.8

1.2       paf         1: /** @file
                      2:        Parser: memory reference counting classes.
                      3: 
1.6       paf         4:        Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.2       paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
                      6: */
                      7: 
1.8     ! paf         8: static const char * const IDENT_MEMORY_C="$Date: 2005/12/16 10:15:12 $";
1.2       paf         9: 
                     10: #include "pa_sapi.h"
                     11: #include "pa_common.h"
                     12: 
                     13: void *pa_fail_alloc(const char* what, size_t size) {
                     14: #ifdef PA_DEBUG_DISABLE_GC
                     15:        SAPI::die("out of memory (in pa_fail_alloc)");
                     16: #else
                     17:        SAPI::die("out of memory: failed to %s %u bytes. "
1.4       paf        18:                "heap_used=%u, heap_free=%u, bytes_since_gc=%u, total_bytes=%u",
1.2       paf        19:                what, size,
                     20:                GC_get_heap_size(),
                     21:                GC_get_free_bytes(),
                     22:                GC_get_bytes_since_gc(),
                     23:                GC_get_total_bytes()
                     24:                );
                     25: #endif
                     26:        // never reached
                     27:        return 0;
                     28: }
                     29: 
                     30: 
                     31: #ifdef PA_DEBUG_GC_MEMORY
                     32: 
                     33: const size_t HEADTAIL_SIZE=4;
                     34: 
                     35: static size_t debug_size(size_t user_size) {
                     36:        return user_size+HEADTAIL_SIZE*2;
                     37: }
                     38: 
                     39: const int BEFORE_MARK=0xBEF0BEF0;
                     40: const int AFTER_MARK=0xAFEEAFEE;
                     41: 
1.8     ! paf        42: #error this code is known not to work: it ruins something with nonGC_DEBUG realloc
        !            43: 
1.7       paf        44: static void* fill_return_user(void* aptr, size_t /*pure_size*/) {
1.2       paf        45:        char* ptr=(char*)aptr;
                     46:        memcpy(ptr, &BEFORE_MARK, HEADTAIL_SIZE);
1.7       paf        47: //     memcpy(ptr+HEADTAIL_SIZE+pure_size, &AFTER_MARK, HEADTAIL_SIZE);
1.2       paf        48: 
                     49:        //if(ptr>=(char*)0x01c357e40 && ptr<=((char*)0x01c357e4+100))
                     50:                //printf("valid:0x%p\n", ptr);
                     51: 
                     52:        return ptr+HEADTAIL_SIZE;
                     53: }
                     54: static void* check_return_debug(void* auser_ptr) {
                     55:        char* user_ptr=(char*)auser_ptr;
                     56:        char* ptr=user_ptr-HEADTAIL_SIZE;
                     57: 
1.7       paf        58:        assert(GC_size(ptr));
1.2       paf        59:        assert(memcmp(ptr, &BEFORE_MARK, HEADTAIL_SIZE)==0);
1.7       paf        60: // don't know real size. can put it to head someday
                     61: //     assert(memcmp(ptr+HEADTAIL_SIZE+pure_size, &AFTER_MARK, HEADTAIL_SIZE)==0);
1.2       paf        62: 
                     63:        return ptr;
                     64: }
                     65: 
                     66: 
                     67: void* pa_gc_malloc(size_t size) {
                     68:        size=debug_size(size);
                     69:        return fill_return_user(GC_MALLOC(size), size);
                     70: }
                     71: 
                     72: void* pa_gc_malloc_atomic(size_t size) {
                     73:        size=debug_size(size);
                     74:        return fill_return_user(GC_MALLOC_ATOMIC(size), size);
                     75: }
                     76: 
                     77: void* pa_gc_realloc(void* user_ptr, size_t size) {
                     78:        GC_is_visible(user_ptr);
                     79: 
                     80:        //printf("realloc: 0x%p -> %u\n", ptr, size);
                     81:        size=debug_size(size);
                     82:        return fill_return_user(
                     83:                GC_realloc(
                     84:                        check_return_debug(user_ptr), 
                     85:                        size),
                     86:                size);
                     87: }
1.7       paf        88: void pa_gc_free(void* user_ptr) {
                     89:        GC_is_visible(user_ptr);
                     90:        check_return_debug(user_ptr);
1.2       paf        91:        // ignore free
                     92: }
                     93: 
                     94: 
                     95: #endif