a156ffda61
The new control interface command TEST_ALLOC_FAIL and GET_ALLOC_FAIL can now be used to trigger memory allocation failures for testing purposes. TEST_ALLOC_FAIL sets a failure conditions with <count>:func[;func][;func]... string and GET_ALLOC_FAIL returns the current state using the same format. Whenever an allocation is made with a matching backtrace of calling functions, the count is decremented by one and once zero is reached, the allocation is forced to fail. Function names can be prefixed with either '=' or '?' to get different matching behavior. '=' requires this specific function to be the next one in the backtrace (i.e., do not skip any other functions in the list which is the default behavior). '?' allows the function to be optionally present in the backtrace. Signed-off-by: Jouni Malinen <j@w1.fi>
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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* Backtrace debugging
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef TRACE_H
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#define TRACE_H
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#define WPA_TRACE_LEN 16
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#ifdef WPA_TRACE
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#include <execinfo.h>
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#include "list.h"
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#define WPA_TRACE_INFO void *btrace[WPA_TRACE_LEN]; int btrace_num;
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struct wpa_trace_ref {
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struct dl_list list;
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const void *addr;
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WPA_TRACE_INFO
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};
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#define WPA_TRACE_REF(name) struct wpa_trace_ref wpa_trace_ref_##name
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#define wpa_trace_dump(title, ptr) \
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wpa_trace_dump_func((title), (ptr)->btrace, (ptr)->btrace_num)
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void wpa_trace_dump_func(const char *title, void **btrace, int btrace_num);
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#define wpa_trace_record(ptr) \
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(ptr)->btrace_num = backtrace((ptr)->btrace, WPA_TRACE_LEN)
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void wpa_trace_show(const char *title);
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#define wpa_trace_add_ref(ptr, name, addr) \
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wpa_trace_add_ref_func(&(ptr)->wpa_trace_ref_##name, (addr))
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void wpa_trace_add_ref_func(struct wpa_trace_ref *ref, const void *addr);
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#define wpa_trace_remove_ref(ptr, name, addr) \
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do { \
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if ((addr)) \
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dl_list_del(&(ptr)->wpa_trace_ref_##name.list); \
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} while (0)
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void wpa_trace_check_ref(const void *addr);
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size_t wpa_trace_calling_func(const char *buf[], size_t len);
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#else /* WPA_TRACE */
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#define WPA_TRACE_INFO
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#define WPA_TRACE_REF(n)
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#define wpa_trace_dump(title, ptr) do { } while (0)
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#define wpa_trace_record(ptr) do { } while (0)
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#define wpa_trace_show(title) do { } while (0)
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#define wpa_trace_add_ref(ptr, name, addr) do { } while (0)
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#define wpa_trace_remove_ref(ptr, name, addr) do { } while (0)
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#define wpa_trace_check_ref(addr) do { } while (0)
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#endif /* WPA_TRACE */
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#ifdef WPA_TRACE_BFD
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void wpa_trace_dump_funcname(const char *title, void *pc);
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#else /* WPA_TRACE_BFD */
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#define wpa_trace_dump_funcname(title, pc) do { } while (0)
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#endif /* WPA_TRACE_BFD */
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#endif /* TRACE_H */
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