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mmap.c (backtrace_vector_release): Make sure freed block is aligned on 8-byte boundary.

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* mmap.c (backtrace_vector_release): Make sure freed block is
	aligned on 8-byte boundary.

From-SVN: r192945
This commit is contained in:
Ian Lance Taylor 2012-10-29 15:43:37 +00:00 committed by Ian Lance Taylor
parent 13a6a8d23f
commit 8277de3441
2 changed files with 17 additions and 2 deletions
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5
libbacktrace/ChangeLog
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@ -1,3 +1,8 @@
2012-10-29 Ian Lance Taylor <iant@google.com>
* mmap.c (backtrace_vector_release): Make sure freed block is
aligned on 8-byte boundary.
2012-10-26 Ian Lance Taylor <iant@google.com>
PR other/55087

14
libbacktrace/mmap.c
View File

@ -229,8 +229,18 @@ backtrace_vector_release (struct backtrace_state *state,
backtrace_error_callback error_callback,
void *data)
{
backtrace_free (state, (char *) vec->base + vec->size, vec->alc,
error_callback, data);
size_t size;
size_t alc;
size_t aligned;
/* Make sure that the block that we free is aligned on an 8-byte
boundary. */
size = vec->size;
alc = vec->alc;
aligned = (size + 7) & ~ (size_t) 7;
alc -= aligned - size;
backtrace_free (state, (char *) vec->base + size, alc, error_callback, data);
vec->alc = 0;
return 1;
}