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Drop detection logic for pre-1.3 busted libevents

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This won't actually break them any worse than they were broken before:
it just removes a set of warnings that nobody was actually seeing, I
hope.

Closes 6826
This commit is contained in:
Nick Mathewson 2013-01-16 14:31:01 -05:00
parent 65e6e68981
commit b30d06255c
2 changed files with 7 additions and 42 deletions
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5
changes/bug6826 Normal file
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@ -0,0 +1,5 @@
o Removed features:
- Drop support for detecting and warning about versions of Libevent
before 1.3e. Nothing reasonable ships with them any longer;
warning the user about them shouldn't be needed. Resolves ticket
6826.

44
src/common/compat_libevent.c
View File

@ -407,39 +407,15 @@ void
tor_check_libevent_version(const char *m, int server,
const char **badness_out)
{
int buggy = 0, iffy = 0, slow = 0, thread_unsafe = 0;
int thread_unsafe = 0;
le_version_t version;
const char *v = NULL;
const char *badness = NULL;
const char *sad_os = "";
(void) m;
version = tor_get_libevent_version(&v);
/* It would be better to disable known-buggy methods rather than warning
* about them. But the problem is that with older versions of Libevent,
* it's not trivial to get them to change their methods once they're
* initialized... and with newer versions of Libevent, they aren't actually
* broken. But we should revisit this if we ever find a post-1.4 version
* of Libevent where we need to disable a given method. */
if (!strcmp(m, "kqueue")) {
if (version < V_OLD(1,1,'b'))
buggy = 1;
} else if (!strcmp(m, "epoll")) {
if (version < V(1,1,0))
iffy = 1;
} else if (!strcmp(m, "poll")) {
if (version < V_OLD(1,0,'e'))
buggy = 1;
if (version < V(1,1,0))
slow = 1;
} else if (!strcmp(m, "select")) {
if (version < V(1,1,0))
slow = 1;
} else if (!strcmp(m, "win32")) {
if (version < V_OLD(1,1,'b'))
buggy = 1;
}
/* Libevent versions before 1.3b do very badly on operating systems with
* user-space threading implementations. */
#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
@ -459,22 +435,6 @@ tor_check_libevent_version(const char *m, int server,
"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 serious bugs in using %s with libevent %s. "
"Please use the latest version of libevent.", m, v);
badness = "BROKEN";
} else if (iffy) {
log(LOG_WARN, LD_GENERAL,
"There are minor bugs in using %s with libevent %s. "
"You may want to use the latest version of libevent.", m, v);
badness = "BUGGY";
} else if (slow && server) {
log(LOG_WARN, LD_GENERAL,
"libevent %s can be very slow with %s. "
"When running a server, please use the latest version of libevent.",
v,m);
badness = "SLOW";
}
*badness_out = badness;