commit 1eebb566911380c22768a8d25061a8f917688349 Author: Nick Mathewson nickm@torproject.org Date: Mon Mar 11 14:52:56 2013 -0400

Another possible diagnostic for 8031.

This time, I'm checking whether our calculated offset matches our real offset, in each case, as we go along. I don't think this is the bug, but it can't hurt to check. --- src/or/microdesc.c | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/src/or/microdesc.c b/src/or/microdesc.c index 7d3f631..bb9668d 100644 --- a/src/or/microdesc.c +++ b/src/or/microdesc.c @@ -415,7 +415,7 @@ microdesc_cache_rebuild(microdesc_cache_t *cache, int force) microdesc_t **mdp; smartlist_t *wrote; ssize_t size; - off_t off = 0; + off_t off = 0, off_real; int orig_size, new_size;

if (cache == NULL) { @@ -458,6 +458,14 @@ microdesc_cache_rebuild(microdesc_cache_t *cache, int force) tor_assert(((size_t)size) == annotation_len + md->bodylen); md->off = off + annotation_len; off += size; + off_real = tor_fd_getpos(fd); + if (off_real != off) { + log_warn(LD_BUG, "Discontinuity in position in microdescriptor cache." + "By my count, I'm at "I64_FORMAT + ", but I should be at "I64_FORMAT, + I64_PRINTF_ARG(off), I64_PRINTF_ARG(off_real)); + off = off_real; + } if (md->saved_location != SAVED_IN_CACHE) { tor_free(md->body); md->saved_location = SAVED_IN_CACHE;