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r12919@catbus: nickm | 2007-05-24 13:04:56 -0400

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backport candidate: Warn when using a version of libevent before 1.3b to run a server on osx or bsd: these versions of libevent interact badly with userspace threads.


svn:r10307
This commit is contained in:
Nick Mathewson 2007-05-24 17:13:05 +00:00
parent 4c6398a8f0
commit 212a3c3478
2 changed files with 26 additions and 3 deletions
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2
ChangeLog
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@ -117,6 +117,8 @@ Changes in version 0.2.0.1-alpha - 2007-??-??
o Minor features (other):
- More unit tests.
- Warn when using a version of libevent before 1.3b to run a server on
OSX or BSD: these versions interact badly with userspace threads.
o Removed features:
- Removed support for the old binary "version 0" controller protocol.

27
src/or/config.c
View File

@ -598,7 +598,7 @@ typedef enum {
/* Note: we compare these, so it's important that "old" precede everything,
* and that "other" come last. */
LE_OLD=0, LE_10C, LE_10D, LE_10E, LE_11, LE_11A, LE_11B, LE_12, LE_12A,
LE_13, LE_13A,
LE_13, LE_13A, LE_13B,
LE_OTHER
} le_version_t;
static le_version_t decode_libevent_version(void);
@ -4034,6 +4034,7 @@ static const struct {
{ "1.2a", LE_12A },
{ "1.3", LE_13 },
{ "1.3a", LE_13A },
{ "1.3b", LE_13B },
{ NULL, LE_OTHER }
};
@ -4060,10 +4061,11 @@ decode_libevent_version(void)
static void
check_libevent_version(const char *m, int server)
{
int buggy = 0, iffy = 0, slow = 0;
int buggy = 0, iffy = 0, slow = 0, thread_unsafe = 0;
le_version_t version;
const char *v = event_get_version();
const char *badness = NULL;
const char *sad_os = "";
version = decode_libevent_version();
@ -4096,7 +4098,26 @@ check_libevent_version(const char *m, int server)
buggy = 1;
}
if (buggy) {
/* Libevent versions before 1.3b do very badly on operating systems with
* user-space threading implementations. */
#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
if (server && version < LE_13B) {
thread_unsafe = 1;
sad_os = "BSD variants"
}
#elif defined(__APPLE__) || defined(__darwin__)
if (server && version < LE_13B) {
thread_unsafe = 1;
sad_os = "Mac OS X";
}
#endif
if (thread_unsafe) {
log(LOG_WARN, LD_GENERAL,
"Libevent version %s often crashes when running a Tor server with %s. "
"Please use the latest version of libevent (1.3b or later)",v,sad_os);
badness = "BROKEN";
} else if (buggy) {
log(LOG_WARN, LD_GENERAL,
"There are known bugs in using %s with libevent %s. "
"Please use the latest version of libevent.", m, v);