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Merge remote-tracking branch 'public/remove_old_libevent_autoconf_stuff'

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This commit is contained in:
Nick Mathewson 2015-04-23 10:27:01 -04:00
commit c366e1fa32
5 changed files with 8 additions and 118 deletions
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3
changes/deprecated-libevents Normal file
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@ -0,0 +1,3 @@
o New system requirements:
- Tor no longer includes workarounds for Libevent versions before 1.3e.
Libevent 2.0 or later is recommended. Closes ticket #15248.

16
configure.ac
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@ -438,15 +438,6 @@ AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
AC_SUBST(TOR_LIB_IPHLPAPI)
dnl We need to do this before we try our disgusting hack below.
AC_CHECK_HEADERS([sys/types.h])
dnl This is a disgusting hack so we safely include older libevent headers.
AC_CHECK_TYPE(u_int64_t, unsigned long long)
AC_CHECK_TYPE(u_int32_t, unsigned long)
AC_CHECK_TYPE(u_int16_t, unsigned short)
AC_CHECK_TYPE(u_int8_t, unsigned char)
tor_libevent_pkg_redhat="libevent"
tor_libevent_pkg_debian="libevent-dev"
tor_libevent_devpkg_redhat="libevent-devel"
@ -487,13 +478,10 @@ save_CPPFLAGS="$CPPFLAGS"
LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
AC_CHECK_FUNCS([event_get_version \
event_get_version_number \
event_get_method \
event_set_log_callback \
AC_CHECK_FUNCS([event_get_version_number \
evutil_secure_rng_set_urandom_device_file \
evutil_secure_rng_init \
event_base_loopexit])
])
AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
[#include <event.h>
])

88
src/common/compat_libevent.c
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@ -56,11 +56,6 @@ typedef uint32_t le_version_t;
* it is. */
#define LE_OTHER V(0,0,99)
#if 0
static le_version_t tor_get_libevent_version(const char **v_out);
#endif
#if defined(HAVE_EVENT_SET_LOG_CALLBACK) || defined(RUNNING_DOXYGEN)
/** A string which, if it appears in a libevent log, should be ignored. */
static const char *suppress_msg = NULL;
/** Callback function passed to event_set_log() so we can intercept
@ -107,17 +102,6 @@ suppress_libevent_log_msg(const char *msg)
{
suppress_msg = msg;
}
#else
void
configure_libevent_logging(void)
{
}
void
suppress_libevent_log_msg(const char *msg)
{
(void)msg;
}
#endif
#ifndef HAVE_EVENT2_EVENT_H
/** Work-alike replacement for event_new() on pre-Libevent-2.0 systems. */
@ -275,19 +259,11 @@ tor_libevent_initialize(tor_libevent_cfg *torcfg)
exit(1);
}
#if defined(HAVE_EVENT_GET_VERSION) && defined(HAVE_EVENT_GET_METHOD)
/* Making this a NOTICE for now so we can link bugs to a libevent versions
* or methods better. */
log_info(LD_GENERAL,
"Initialized libevent version %s using method %s. Good.",
event_get_version(), tor_libevent_get_method());
#else
log_notice(LD_GENERAL,
"Initialized old libevent (version 1.0b or earlier).");
log_warn(LD_GENERAL,
"You have a *VERY* old version of libevent. It is likely to be buggy; "
"please build Tor with a more recent version.");
#endif
#ifdef USE_BUFFEREVENTS
tor_libevent_set_tick_timeout(torcfg->msec_per_tick);
@ -301,27 +277,14 @@ tor_libevent_get_base, (void))
return the_event_base;
}
#ifndef HAVE_EVENT_BASE_LOOPEXIT
/** Replacement for event_base_loopexit on some very old versions of Libevent
* that we are not yet brave enough to deprecate. */
int
tor_event_base_loopexit(struct event_base *base, struct timeval *tv)
{
tor_assert(base == the_event_base);
return event_loopexit(tv);
}
#endif
/** Return the name of the Libevent backend we're using. */
const char *
tor_libevent_get_method(void)
{
#ifdef HAVE_EVENT2_EVENT_H
return event_base_get_method(the_event_base);
#elif defined(HAVE_EVENT_GET_METHOD)
return event_get_method();
#else
return "<unknown>";
return event_get_method();
#endif
}
@ -376,54 +339,12 @@ le_versions_compatibility(le_version_t v)
return 5;
}
#if 0
/** Return the version number of the currently running version of Libevent.
* See le_version_t for info on the format.
*/
static le_version_t
tor_get_libevent_version(const char **v_out)
{
const char *v;
le_version_t r;
#if defined(HAVE_EVENT_GET_VERSION_NUMBER)
v = event_get_version();
r = event_get_version_number();
#elif defined (HAVE_EVENT_GET_VERSION)
v = event_get_version();
r = tor_decode_libevent_version(v);
#else
v = "pre-1.0c";
r = LE_OLD;
#endif
if (v_out)
*v_out = v;
return r;
}
#endif
/** Return a string representation of the version of the currently running
* version of Libevent. */
const char *
tor_libevent_get_version_str(void)
{
#ifdef HAVE_EVENT_GET_VERSION
return event_get_version();
#else
return "pre-1.0c";
#endif
}
/**
* Compare the current Libevent method and version to a list of versions
* which are known not to work. Warn the user as appropriate.
*/
void
tor_check_libevent_version(const char *m, int server,
const char **badness_out)
{
(void) m;
(void) server;
*badness_out = NULL;
}
#if defined(LIBEVENT_VERSION)
@ -452,7 +373,7 @@ tor_check_libevent_header_compatibility(void)
/* In libevent versions before 2.0, it's hard to keep binary compatibility
* between upgrades, and unpleasant to detect when the version we compiled
* against is unlike the version we have linked against. Here's how. */
#if defined(HEADER_VERSION) && defined(HAVE_EVENT_GET_VERSION)
#if defined(HEADER_VERSION)
/* We have a header-file version and a function-call version. Easy. */
if (strcmp(HEADER_VERSION, event_get_version())) {
le_version_t v1, v2;
@ -474,7 +395,7 @@ tor_check_libevent_header_compatibility(void)
else
log_info(LD_GENERAL, "I think these versions are binary-compatible.");
}
#elif defined(HAVE_EVENT_GET_VERSION)
#else
/* event_get_version but no _EVENT_VERSION. We might be in 1.4.0-beta or
earlier, where that's normal. To see whether we were compiled with an
earlier version, let's see whether the struct event defines MIN_HEAP_IDX.
@ -504,9 +425,6 @@ tor_check_libevent_header_compatibility(void)
}
#endif
#elif defined(HEADER_VERSION)
#warn "_EVENT_VERSION is defined but not get_event_version(): Libevent is odd."
#else
/* Your libevent is ancient. */
#endif
}

7
src/common/compat_libevent.h
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@ -52,12 +52,7 @@ periodic_timer_t *periodic_timer_new(struct event_base *base,
void *data);
void periodic_timer_free(periodic_timer_t *);
#ifdef HAVE_EVENT_BASE_LOOPEXIT
#define tor_event_base_loopexit event_base_loopexit
#else
struct timeval;
int tor_event_base_loopexit(struct event_base *base, struct timeval *tv);
#endif
/** Defines a configuration for using libevent with Tor: passed as an argument
* to tor_libevent_initialize() to describe how we want to set up. */
@ -74,8 +69,6 @@ typedef struct tor_libevent_cfg {
void tor_libevent_initialize(tor_libevent_cfg *cfg);
MOCK_DECL(struct event_base *, tor_libevent_get_base, (void));
const char *tor_libevent_get_method(void);
void tor_check_libevent_version(const char *m, int server,
const char **badness_out);
void tor_check_libevent_header_compatibility(void);
const char *tor_libevent_get_version_str(void);
const char *tor_libevent_get_header_version_str(void);

12
src/or/config.c
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@ -6748,7 +6748,6 @@ get_num_cpus(const or_options_t *options)
static void
init_libevent(const or_options_t *options)
{
const char *badness=NULL;
tor_libevent_cfg cfg;
tor_assert(options);
@ -6769,17 +6768,6 @@ init_libevent(const or_options_t *options)
tor_libevent_initialize(&cfg);
suppress_libevent_log_msg(NULL);
tor_check_libevent_version(tor_libevent_get_method(),
server_mode(get_options()),
&badness);
if (badness) {
const char *v = tor_libevent_get_version_str();
const char *m = tor_libevent_get_method();
control_event_general_status(LOG_WARN,
"BAD_LIBEVENT VERSION=%s METHOD=%s BADNESS=%s RECOVERED=NO",
v, m, badness);
}
}
/** Return a newly allocated string holding a filename relative to the data