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      1 /*
      2  * Backtrace debugging
      3  * Copyright (c) 2009, Jouni Malinen <j (at) w1.fi>
      4  *
      5  * This software may be distributed under the terms of the BSD license.
      6  * See README for more details.
      7  */
      8 
      9 #ifndef TRACE_H
     10 #define TRACE_H
     11 
     12 #define WPA_TRACE_LEN 16
     13 
     14 #ifdef WPA_TRACE
     15 #include <execinfo.h>
     16 
     17 #include "list.h"
     18 
     19 #define WPA_TRACE_INFO void *btrace[WPA_TRACE_LEN]; int btrace_num;
     20 
     21 struct wpa_trace_ref {
     22 	struct dl_list list;
     23 	const void *addr;
     24 	WPA_TRACE_INFO
     25 };
     26 #define WPA_TRACE_REF(name) struct wpa_trace_ref wpa_trace_ref_##name
     27 
     28 #define wpa_trace_dump(title, ptr) \
     29 	wpa_trace_dump_func((title), (ptr)->btrace, (ptr)->btrace_num)
     30 void wpa_trace_dump_func(const char *title, void **btrace, int btrace_num);
     31 #define wpa_trace_record(ptr) \
     32 	(ptr)->btrace_num = backtrace((ptr)->btrace, WPA_TRACE_LEN)
     33 void wpa_trace_show(const char *title);
     34 #define wpa_trace_add_ref(ptr, name, addr) \
     35 	wpa_trace_add_ref_func(&(ptr)->wpa_trace_ref_##name, (addr))
     36 void wpa_trace_add_ref_func(struct wpa_trace_ref *ref, const void *addr);
     37 #define wpa_trace_remove_ref(ptr, name, addr)	\
     38 	do { \
     39 		if ((addr)) \
     40 			dl_list_del(&(ptr)->wpa_trace_ref_##name.list); \
     41 	} while (0)
     42 void wpa_trace_check_ref(const void *addr);
     43 
     44 #else /* WPA_TRACE */
     45 
     46 #define WPA_TRACE_INFO
     47 #define WPA_TRACE_REF(n)
     48 #define wpa_trace_dump(title, ptr) do { } while (0)
     49 #define wpa_trace_record(ptr) do { } while (0)
     50 #define wpa_trace_show(title) do { } while (0)
     51 #define wpa_trace_add_ref(ptr, name, addr) do { } while (0)
     52 #define wpa_trace_remove_ref(ptr, name, addr) do { } while (0)
     53 #define wpa_trace_check_ref(addr) do { } while (0)
     54 
     55 #endif /* WPA_TRACE */
     56 
     57 
     58 #ifdef WPA_TRACE_BFD
     59 
     60 void wpa_trace_dump_funcname(const char *title, void *pc);
     61 
     62 #else /* WPA_TRACE_BFD */
     63 
     64 #define wpa_trace_dump_funcname(title, pc) do { } while (0)
     65 
     66 #endif /* WPA_TRACE_BFD */
     67 
     68 #endif /* TRACE_H */
     69