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/* btalloc() provides a mechanism for allocating via permuted backtraces. */
void *btalloc(size_t size, unsigned bits);
#define btalloc_n_proto(n) \
void *btalloc_##n(size_t size, unsigned bits);
btalloc_n_proto(0)
btalloc_n_proto(1)
#define btalloc_n_gen(n) \
void * \
btalloc_##n(size_t size, unsigned bits) { \
void *p; \
\
if (bits == 0) { \
p = mallocx(size, 0); \
} else { \
switch (bits & 0x1U) { \
case 0: \
p = (btalloc_0(size, bits >> 1)); \
break; \
case 1: \
p = (btalloc_1(size, bits >> 1)); \
break; \
default: not_reached(); \
} \
} \
/* Intentionally sabotage tail call optimization. */ \
expect_ptr_not_null(p, "Unexpected mallocx() failure"); \
return p; \
}
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