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Letting malloc() help to find initialization failures and uses-after-free.

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Change was suggested by Mike Frysinger.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5345 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Benno Schulenberg 2015-08-06 09:01:33 +00:00
parent 24d6b7fcf7
commit 30daf4d43f
3 changed files with 15 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2015-08-06 Benno Schulenberg <bensberg@justemail.net>
* src/nano.c (main): For --enable-debug builds, let malloc() help
to find initialization failures and uses-after-free. Suggested by
Mike Frysinger.
2015-08-04 Benno Schulenberg <bensberg@justemail.net> 2015-08-04 Benno Schulenberg <bensberg@justemail.net>
* src/nano.c (main), src/files.c (read_file), src/rcfile.c, * src/nano.c (main), src/files.c (read_file), src/rcfile.c,
doc/man/nano.1, doc/man/nanorc.5, doc/texinfo/nano.texi: Add doc/man/nano.1, doc/man/nanorc.5, doc/texinfo/nano.texi: Add

6
src/nano.c
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@ -2196,6 +2196,12 @@ int main(int argc, char **argv)
}; };
#endif #endif
#ifdef DEBUG
/* Help to find failed-to-initialize and use-after-free problems. */
mallopt(M_CHECK_ACTION, 3);
mallopt(M_PERTURB, 0x4c);
#endif
#ifdef ENABLE_UTF8 #ifdef ENABLE_UTF8
{ {
/* If the locale set exists and uses UTF-8, we should use /* If the locale set exists and uses UTF-8, we should use

4
src/nano.h
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@ -54,6 +54,10 @@
#include <stdarg.h> #include <stdarg.h>
#endif #endif
#ifdef DEBUG
#include <malloc.h>
#endif
/* Suppress warnings for __attribute__((warn_unused_result)). */ /* Suppress warnings for __attribute__((warn_unused_result)). */
#define IGNORE_CALL_RESULT(call) do { if (call) {} } while(0) #define IGNORE_CALL_RESULT(call) do { if (call) {} } while(0)