DGNum/hostapd
6
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

trace: Add active reference tracking

Browse source 
This WPA_TRACE=y additions allows components to register active references
to memory that has been provided to them as a pointer. If such an actively
referenced memory area is freed, tracer will report this as an error and
backtraces of both the invalid free and the location where this pointer
was marked referenced are shown.
This commit is contained in:
Jouni Malinen 2009-12-22 01:11:15 +02:00
parent a698d28415
commit a6ff0e0810
4 changed files with 106 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

23
src/utils/trace.h
View file

@ -20,20 +20,43 @@
#ifdef WPA_TRACE
#include <execinfo.h>
#include "list.h"
#define WPA_TRACE_INFO void *btrace[WPA_TRACE_LEN]; int btrace_num;
struct wpa_trace_ref {
struct dl_list list;
const void *addr;
WPA_TRACE_INFO
};
#define WPA_TRACE_REF(name) struct wpa_trace_ref wpa_trace_ref_##name
#define wpa_trace_dump(title, ptr) \
wpa_trace_dump_func((title), (ptr)->btrace, (ptr)->btrace_num)
void wpa_trace_dump_func(const char *title, void **btrace, int btrace_num);
#define wpa_trace_record(ptr) \
(ptr)->btrace_num = backtrace((ptr)->btrace, WPA_TRACE_LEN)
void wpa_trace_show(const char *title);
#define wpa_trace_add_ref(ptr, name, addr) \
wpa_trace_add_ref_func(&(ptr)->wpa_trace_ref_##name, (addr))
void wpa_trace_add_ref_func(struct wpa_trace_ref *ref, const void *addr);
#define wpa_trace_remove_ref(ptr, name, addr) \
do { \
if ((addr)) \
dl_list_del(&(ptr)->wpa_trace_ref_##name.list); \
} while (0)
void wpa_trace_check_ref(const void *addr);
#else /* WPA_TRACE */
#define WPA_TRACE_INFO
#define WPA_TRACE_REF(n)
#define wpa_trace_dump(title, ptr) do { } while (0)
#define wpa_trace_record(ptr) do { } while (0)
#define wpa_trace_show(title) do { } while (0)
#define wpa_trace_add_ref(ptr, name, addr) do { } while (0)
#define wpa_trace_remove_ref(ptr, name, addr) do { } while (0)
#define wpa_trace_check_ref(addr) do { } while (0)
#endif /* WPA_TRACE */