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rtp_engine: Skip useless self-assignment in ast_rtp_engine_unload_format.

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When running valgrind on Asterisk, it complained about:

    ==32423== Source and destination overlap in memcpy(0x85a920, 0x85a920, 304)
    ==32423==    at 0x4C2F71C: memcpy@@GLIBC_2.14 (in /usr/lib/valgrind/...)
    ==32423==    by 0x55BA91: ast_rtp_engine_unload_format (rtp_engine.c:2292)
    ==32423==    by 0x4EEFB7: ast_format_attr_unreg_interface (format.c:1437)

The code in question is a struct assignment, which may be performed by
memcpy as a compiler optimization. It is changed to only copy the struct
contents if source and destination are different.

ASTERISK-25219 #close

Change-Id: I6d3546c326b03378ca8e9b8cefd41c16e0088b9a
This commit is contained in:
Walter Doekes
2015-07-02 13:10:59 +02:00
parent c12ace3ab3
commit 13a318bbb1
1 changed files with 3 additions and 1 deletions
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4
main/rtp_engine.c
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@@ -1798,7 +1798,9 @@ int ast_rtp_engine_unload_format(struct ast_format *format)
rtp_engine_mime_type_cleanup(x);
continue;
}
ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
if (x != y) {
ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
}
y++;
}
mime_types_len = y;