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@ -294,6 +294,28 @@ the performance impact for storing such information would be prohibitive.
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There are a number of allocator implementations available on the Internet
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which focus on detecting and pinpointing problems by trading performance for
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extra sanity checks and detailed diagnostics.
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.Sh ENVIRONMENT
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The following environment variables affect the execution of the allocation
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functions:
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.Bl -tag -width ".Ev MALLOC_OPTIONS"
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.It Ev MALLOC_OPTIONS
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If the environment variable
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.Ev MALLOC_OPTIONS
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is set, the characters it contains will be interpreted as flags to the
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allocation functions.
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.El
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.Sh EXAMPLES
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To dump core whenever a problem occurs:
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.Pp
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.Bd -literal -offset indent
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ln -s 'A' /etc/malloc.conf
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.Ed
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.Pp
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To specify in the source that a program does no return value checking
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on calls to these functions:
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.Bd -literal -offset indent
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_malloc_options = "X";
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.Ed
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.Sh DIAGNOSTICS
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If any of the memory allocation/deallocation functions detect an error or
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warning condition, a message will be printed to file descriptor
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@ -319,28 +341,6 @@ this function is likely to result in a crash or deadlock.
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.Pp
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All messages are prefixed by
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.Dq Ao Ar progname Ac Ns Li \&: Pq malloc .
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.Sh ENVIRONMENT
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The following environment variables affect the execution of the allocation
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functions:
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.Bl -tag -width ".Ev MALLOC_OPTIONS"
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.It Ev MALLOC_OPTIONS
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If the environment variable
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.Ev MALLOC_OPTIONS
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is set, the characters it contains will be interpreted as flags to the
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allocation functions.
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.El
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.Sh EXAMPLES
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To dump core whenever a problem occurs:
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.Pp
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.Bd -literal -offset indent
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ln -s 'A' /etc/malloc.conf
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.Ed
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.Pp
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To specify in the source that a program does no return value checking
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on calls to these functions:
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.Bd -literal -offset indent
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_malloc_options = "X";
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.Ed
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.Sh SEE ALSO
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.Xr emalloc 3 ,
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.Xr malloc 3 ,
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