mirror of
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c9f415d7ea
replacement is subject to conditions on the replacement functions.
they may only call functions which are async-signal-safe, as specified
either by POSIX or as an implementation-defined extension. if any
allocator functions are replaced, at least malloc, realloc, and free
must be provided. if calloc is not provided, it will behave as
malloc+memset. any of the memalign-family functions not provided will
fail with ENOMEM.
in order to implement the above properties, calloc and __memalign
check that they are using their own malloc or free, respectively.
choice to check malloc or free is based on considerations of
supporting __simple_malloc. in order to make this work, calloc is
split into separate versions for __simple_malloc and full malloc;
commit ba819787ee already did most of
the split anyway, and completing it saves an extra call frame.
previously, use of -Bsymbolic-functions made dynamic interposition
impossible. now, we are using an explicit dynamic-list, so add
allocator functions to the list. most are not referenced anyway, but
all are added for completeness.
45 lines
403 B
Plaintext
45 lines
403 B
Plaintext
{
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environ;
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__environ;
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stdin;
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stdout;
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stderr;
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malloc;
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calloc;
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realloc;
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free;
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memalign;
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posix_memalign;
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aligned_alloc;
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malloc_usable_size;
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timezone;
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daylight;
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tzname;
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__timezone;
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__daylight;
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__tzname;
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signgam;
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__signgam;
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optarg;
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optind;
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opterr;
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optreset;
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__optreset;
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getdate_err;
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h_errno;
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program_invocation_name;
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program_invocation_short_name;
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__progname;
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__progname_full;
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__stack_chk_guard;
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};
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