512fc6db7b
This fix was cherry-picked by Mozilla from upstream libevent-2.1 to its bundled copy of libevent-2.0.21 in mozilla-esr45. * gnu/packages/patches/libevent-2.0-evbuffer-add-use-last-with-datap.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/libevent.scm (libevent-2.0)[source][patches]: Add it.
38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
From a8769ef12d7e223e33fc47bed03fba2bfa2f3536 Mon Sep 17 00:00:00 2001
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From: Marcus Sundberg <marcus@marcussundberg.com>
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Date: Sat, 26 Mar 2016 20:11:43 +0100
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Subject: [PATCH] evbuffer_add: Use last_with_datap if set, not last.
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evbuffer_add() would always put data in the last chain, even if there
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was available space in a previous chain, and in doing so it also
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failed to update last_with_datap, causing subsequent calls to other
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functions that do look at last_with_datap to add data in the middle
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of the evbuffer instead of at the end.
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Fixes the evbuffer_add() part of issue #335, and the evbuffer/add2 and
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evbuffer/add3 tests, and also prevents wasting space available in the
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chain pointed to by last_with_datap.
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---
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buffer.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/buffer.c b/buffer.c
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index 7cca0e8a..f378b731 100644
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--- a/buffer.c
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+++ b/buffer.c
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@@ -1732,7 +1732,11 @@ evbuffer_add(struct evbuffer *buf, const void *data_in, size_t datlen)
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goto done;
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}
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- chain = buf->last;
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+ if (*buf->last_with_datap == NULL) {
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+ chain = buf->last;
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+ } else {
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+ chain = *buf->last_with_datap;
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+ }
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/* If there are no chains allocated for this buffer, allocate one
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* big enough to hold all the data. */
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--
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2.12.0
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