[or-cvs] [tor/master] Refactor a bit so that it is safe to include math.h, and mostly not needed.
Nick Mathewson
nickm at seul.org
Tue Dec 15 19:42:13 UTC 2009
Author: Nick Mathewson <nickm at torproject.org>
Date: Tue, 15 Dec 2009 14:32:55 -0500
Subject: Refactor a bit so that it is safe to include math.h, and mostly not needed.
Commit: e56747f9cf29ed788baf8805bfe391925d8a19da
---
src/common/log.c | 2 +-
src/common/log.h | 4 +-
src/common/util.c | 49 +++++++++++++++++++++++++++++---------
src/common/util.h | 4 ++-
src/or/circuitbuild.c | 61 ++++++++++++++----------------------------------
src/or/or.h | 7 +++--
src/tools/Makefile.am | 6 ++--
7 files changed, 68 insertions(+), 65 deletions(-)
diff --git a/src/common/log.c b/src/common/log.c
index 5b5b9e0..ef65be8 100644
--- a/src/common/log.c
+++ b/src/common/log.c
@@ -328,7 +328,7 @@ logv(int severity, log_domain_mask_t domain, const char *funcname,
/** Output a message to the log. */
void
-_log(int severity, log_domain_mask_t domain, const char *format, ...)
+tor_log(int severity, log_domain_mask_t domain, const char *format, ...)
{
va_list ap;
if (severity > _log_global_min_severity)
diff --git a/src/common/log.h b/src/common/log.h
index f1a6164..9f9a427 100644
--- a/src/common/log.h
+++ b/src/common/log.h
@@ -140,9 +140,9 @@ void change_callback_log_severity(int loglevelMin, int loglevelMax,
void log_set_application_name(const char *name);
/* Outputs a message to stdout */
-void _log(int severity, log_domain_mask_t domain, const char *format, ...)
+void tor_log(int severity, log_domain_mask_t domain, const char *format, ...)
CHECK_PRINTF(3,4);
-#define log _log /* hack it so we don't conflict with log() as much */
+#define log tor_log /* hack it so we don't conflict with log() as much */
#ifdef __GNUC__
extern int _log_global_min_severity;
diff --git a/src/common/util.c b/src/common/util.c
index 06c8909..e70a9ea 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -16,6 +16,7 @@
#include "orconfig.h"
#include "util.h"
#include "log.h"
+#undef log
#include "crypto.h"
#include "torint.h"
#include "container.h"
@@ -30,6 +31,11 @@
#include <pwd.h>
#endif
+/* math.h needs this on Linux */
+#ifndef __USE_ISOC99
+#define __USE_ISOC99 1
+#endif
+#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@@ -278,7 +284,7 @@ tor_log_mallinfo(int severity)
struct mallinfo mi;
memset(&mi, 0, sizeof(mi));
mi = mallinfo();
- log(severity, LD_MM,
+ tor_log(severity, LD_MM,
"mallinfo() said: arena=%d, ordblks=%d, smblks=%d, hblks=%d, "
"hblkhd=%d, usmblks=%d, fsmblks=%d, uordblks=%d, fordblks=%d, "
"keepcost=%d",
@@ -301,6 +307,25 @@ tor_log_mallinfo(int severity)
* Math
* ===== */
+/**
+ * Returns the natural logarithm of d base 2. We define this wrapper here so
+ * as to make it easier not to conflict with Tor's log() macro.
+ */
+double
+tor_mathlog(double d)
+{
+ return log(d);
+}
+
+/** Return the long integer closest to d. We define this wrapper here so
+ * that not all users of math.h need to use the right incancations to get
+ * the c99 functions. */
+long
+tor_lround(double d)
+{
+ return lround(d);
+}
+
/** Returns floor(log2(u64)). If u64 is 0, (incorrectly) returns 0. */
int
tor_log2(uint64_t u64)
@@ -1650,12 +1675,12 @@ check_private_dir(const char *dirname, cpd_check_t check)
tor_free(f);
if (r) {
if (errno != ENOENT) {
- log(LOG_WARN, LD_FS, "Directory %s cannot be read: %s", dirname,
- strerror(errno));
+ log_warn(LD_FS, "Directory %s cannot be read: %s", dirname,
+ strerror(errno));
return -1;
}
if (check == CPD_NONE) {
- log(LOG_WARN, LD_FS, "Directory %s does not exist.", dirname);
+ log_warn(LD_FS, "Directory %s does not exist.", dirname);
return -1;
} else if (check == CPD_CREATE) {
log_info(LD_GENERAL, "Creating directory %s", dirname);
@@ -1665,7 +1690,7 @@ check_private_dir(const char *dirname, cpd_check_t check)
r = mkdir(dirname, 0700);
#endif
if (r) {
- log(LOG_WARN, LD_FS, "Error creating directory %s: %s", dirname,
+ log_warn(LD_FS, "Error creating directory %s: %s", dirname,
strerror(errno));
return -1;
}
@@ -1675,7 +1700,7 @@ check_private_dir(const char *dirname, cpd_check_t check)
return 0;
}
if (!(st.st_mode & S_IFDIR)) {
- log(LOG_WARN, LD_FS, "%s is not a directory", dirname);
+ log_warn(LD_FS, "%s is not a directory", dirname);
return -1;
}
#ifndef MS_WINDOWS
@@ -1688,7 +1713,7 @@ check_private_dir(const char *dirname, cpd_check_t check)
pw = getpwuid(st.st_uid);
- log(LOG_WARN, LD_FS, "%s is not owned by this user (%s, %d) but by "
+ log_warn(LD_FS, "%s is not owned by this user (%s, %d) but by "
"%s (%d). Perhaps you are running Tor as the wrong user?",
dirname, process_ownername, (int)getuid(),
pw ? pw->pw_name : "<unknown>", (int)st.st_uid);
@@ -1697,9 +1722,9 @@ check_private_dir(const char *dirname, cpd_check_t check)
return -1;
}
if (st.st_mode & 0077) {
- log(LOG_WARN, LD_FS, "Fixing permissions on directory %s", dirname);
+ log_warn(LD_FS, "Fixing permissions on directory %s", dirname);
if (chmod(dirname, 0700)) {
- log(LOG_WARN, LD_FS, "Could not chmod directory %s: %s", dirname,
+ log_warn(LD_FS, "Could not chmod directory %s: %s", dirname,
strerror(errno));
return -1;
} else {
@@ -1784,7 +1809,7 @@ start_writing_to_file(const char *fname, int open_flags, int mode,
} else {
open_name = new_file->tempname = tor_malloc(tempname_len);
if (tor_snprintf(new_file->tempname, tempname_len, "%s.tmp", fname)<0) {
- log(LOG_WARN, LD_GENERAL, "Failed to generate filename");
+ log_warn(LD_GENERAL, "Failed to generate filename");
goto err;
}
/* We always replace an existing temporary file if there is one. */
@@ -1796,7 +1821,7 @@ start_writing_to_file(const char *fname, int open_flags, int mode,
new_file->binary = 1;
if ((new_file->fd = open(open_name, open_flags, mode)) < 0) {
- log(LOG_WARN, LD_FS, "Couldn't open \"%s\" (%s) for writing: %s",
+ log_warn(LD_FS, "Couldn't open \"%s\" (%s) for writing: %s",
open_name, fname, strerror(errno));
goto err;
}
@@ -1933,7 +1958,7 @@ write_chunks_to_file_impl(const char *fname, const smartlist_t *chunks,
{
result = write_all(fd, chunk->bytes, chunk->len, 0);
if (result < 0) {
- log(LOG_WARN, LD_FS, "Error writing to \"%s\": %s", fname,
+ log_warn(LD_FS, "Error writing to \"%s\": %s", fname,
strerror(errno));
goto err;
}
diff --git a/src/common/util.h b/src/common/util.h
index 85234f5..17cbb4a 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -43,7 +43,7 @@
* stderr. */
#define tor_assert(expr) STMT_BEGIN \
if (PREDICT_UNLIKELY(!(expr))) { \
- log(LOG_ERR, LD_BUG, "%s:%d: %s: Assertion %s failed; aborting.", \
+ log_err(LD_BUG, "%s:%d: %s: Assertion %s failed; aborting.", \
_SHORT_FILE_, __LINE__, __func__, #expr); \
fprintf(stderr,"%s:%d %s: Assertion %s failed; aborting.\n", \
_SHORT_FILE_, __LINE__, __func__, #expr); \
@@ -152,6 +152,8 @@ void tor_log_mallinfo(int severity);
#define bool_neq(a,b) (!(a)!=!(b))
/* Math functions */
+double tor_mathlog(double d) ATTR_CONST;
+long tor_lround(double d) ATTR_CONST;
int tor_log2(uint64_t u64) ATTR_CONST;
uint64_t round_to_power_of_2(uint64_t u64);
unsigned round_to_next_multiple_of(unsigned number, unsigned divisor);
diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c
index de9ebe1..d8cf4e4 100644
--- a/src/or/circuitbuild.c
+++ b/src/or/circuitbuild.c
@@ -13,41 +13,13 @@
#include "or.h"
#include "crypto.h"
+#undef log
+#include <math.h>
#ifndef MIN
#define MIN(a,b) ((a)<(b)?(a):(b))
#endif
-/*
- * This madness is needed because if we simply #undef log
- * before including or.h or log.h, we get linker collisions
- * and random segfaults due to memory corruption (and
- * not even at calls to log() either!)
- */
- /* XXX022 somebody should rename Tor's log() function, so we can
- * remove this wart. -RD */
-#undef log
-
-/*
- * Linux doesn't provide lround in math.h by default, but mac os does...
- * It's best just to leave math.h out of the picture entirely.
- */
-//#define log math_h_log
-//#include <math.h>
-//#undef log
-long int lround(double x);
-double ln(double x);
-double log(double x);
-double pow(double x, double y);
-
-double
-ln(double x)
-{
- return log(x);
-}
-
-#define log _log
-
/********* START VARIABLES **********/
/** Global list of circuit build times */
// FIXME: Add this as a member for entry_guard_t instead of global?
@@ -523,9 +495,9 @@ circuit_build_times_update_alpha(circuit_build_times_t *cbt)
}
if (x[i] < cbt->Xm) {
- a += ln(cbt->Xm);
+ a += tor_mathlog(cbt->Xm);
} else {
- a += ln(x[i]);
+ a += tor_mathlog(x[i]);
}
n++;
}
@@ -536,7 +508,7 @@ circuit_build_times_update_alpha(circuit_build_times_t *cbt)
}
tor_assert(n==cbt->total_build_times);
- a -= n*ln(cbt->Xm);
+ a -= n*tor_mathlog(cbt->Xm);
a = n/a;
cbt->alpha = a;
@@ -611,7 +583,8 @@ circuit_build_times_generate_sample(circuit_build_times_t *cbt,
tor_assert(0 <= u && u < 1.0);
/* circuit_build_times_calculate_timeout returns <= INT32_MAX */
- ret = (build_time_t)lround(circuit_build_times_calculate_timeout(cbt, u));
+ ret = (build_time_t)
+ tor_lround(circuit_build_times_calculate_timeout(cbt, u));
tor_assert(ret > 0);
return ret;
}
@@ -624,7 +597,7 @@ circuit_build_times_add_timeout_worker(circuit_build_times_t *cbt,
build_time_t gentime = circuit_build_times_generate_sample(cbt,
quantile_cutoff, MAX_SYNTHETIC_QUANTILE);
- if (gentime < (build_time_t)lround(cbt->timeout_ms)) {
+ if (gentime < (build_time_t)tor_lround(cbt->timeout_ms)) {
log_warn(LD_CIRC,
"Generated a synthetic timeout LESS than the current timeout: "
"%ums vs %lfms using Xm: %d a: %lf, q: %lf",
@@ -658,7 +631,8 @@ circuit_build_times_initial_alpha(circuit_build_times_t *cbt,
// -ln(1-0.8)/(ln(CircBuildTimeout)-ln(Xm))=a
tor_assert(quantile >= 0);
tor_assert(cbt->Xm > 0);
- cbt->alpha = ln(1.0-quantile)/(ln(cbt->Xm)-ln(timeout_ms));
+ cbt->alpha = tor_mathlog(1.0-quantile)/
+ (tor_mathlog(cbt->Xm)-tor_mathlog(timeout_ms));
tor_assert(cbt->alpha > 0);
}
@@ -795,7 +769,7 @@ circuit_build_times_network_check_live(circuit_build_times_t *cbt)
"Network is flaky. No activity for %ld seconds. "
"Temporarily raising timeout to %lds.",
(long int)(now - cbt->liveness.network_last_live),
- lround(circuit_build_times_get_initial_timeout()/1000));
+ tor_lround(circuit_build_times_get_initial_timeout()/1000));
cbt->timeout_ms = circuit_build_times_get_initial_timeout();
}
@@ -849,7 +823,8 @@ circuit_build_times_network_check_changed(circuit_build_times_t *cbt)
log_notice(LD_CIRC,
"Network connection speed appears to have changed. Resetting "
"timeout to %lds after %d timeouts and %d buildtimes.",
- lround(cbt->timeout_ms/1000), timeout_count, total_build_times);
+ tor_lround(cbt->timeout_ms/1000), timeout_count,
+ total_build_times);
return 1;
}
@@ -921,7 +896,7 @@ circuit_build_times_set_timeout(circuit_build_times_t *cbt)
log_info(LD_CIRC,
"Set circuit build timeout to %lds (%lfms, Xm: %d, a: %lf) "
- "based on %d circuit times", lround(cbt->timeout_ms/1000),
+ "based on %d circuit times", tor_lround(cbt->timeout_ms/1000),
cbt->timeout_ms, cbt->Xm, cbt->alpha, cbt->total_build_times);
}
@@ -1083,7 +1058,7 @@ void
circuit_log_path(int severity, unsigned int domain, origin_circuit_t *circ)
{
char *s = circuit_list_path(circ,1);
- log(severity,domain,"%s",s);
+ tor_log(severity,domain,"%s",s);
tor_free(s);
}
@@ -1402,7 +1377,7 @@ inform_testing_reachability(void)
"CHECKING_REACHABILITY DIRADDRESS=%s:%d",
me->address, me->dir_port);
}
- log(LOG_NOTICE, LD_OR, "Now checking whether ORPort %s:%d%s %s reachable... "
+ log_notice(LD_OR, "Now checking whether ORPort %s:%d%s %s reachable... "
"(this may take up to %d minutes -- look for log "
"messages indicating success)",
me->address, me->or_port,
@@ -1527,7 +1502,7 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
or_options_t *options = get_options();
has_completed_circuit=1;
/* FFFF Log a count of known routers here */
- log(LOG_NOTICE, LD_GENERAL,
+ log_notice(LD_GENERAL,
"Tor has successfully opened a circuit. "
"Looks like client functionality is working.");
control_event_bootstrap(BOOTSTRAP_STATUS_DONE, 0);
@@ -1582,7 +1557,7 @@ void
circuit_note_clock_jumped(int seconds_elapsed)
{
int severity = server_mode(get_options()) ? LOG_WARN : LOG_NOTICE;
- log(severity, LD_GENERAL, "Your system clock just jumped %d seconds %s; "
+ tor_log(severity, LD_GENERAL, "Your system clock just jumped %d seconds %s; "
"assuming established circuits no longer work.",
seconds_elapsed >=0 ? seconds_elapsed : -seconds_elapsed,
seconds_elapsed >=0 ? "forward" : "backward");
diff --git a/src/or/or.h b/src/or/or.h
index 2e575f5..054568d 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -3002,7 +3002,7 @@ typedef uint32_t build_time_t;
* at which point we switch back to computing the timeout from
* our saved history.
*/
-#define NETWORK_NONLIVE_TIMEOUT_COUNT (lround(RECENT_CIRCUITS*0.15))
+#define NETWORK_NONLIVE_TIMEOUT_COUNT (tor_lround(RECENT_CIRCUITS*0.15))
/**
* This tells us when to toss out the last streak of N timeouts.
@@ -3010,7 +3010,8 @@ typedef uint32_t build_time_t;
* If instead we start getting cells, we switch back to computing the timeout
* from our saved history.
*/
-#define NETWORK_NONLIVE_DISCARD_COUNT (lround(NETWORK_NONLIVE_TIMEOUT_COUNT*2))
+#define NETWORK_NONLIVE_DISCARD_COUNT \
+ (tor_lround(NETWORK_NONLIVE_TIMEOUT_COUNT*2))
/**
* Maximum count of timeouts that finish the first hop in the past
@@ -3019,7 +3020,7 @@ typedef uint32_t build_time_t;
* This tells us to abandon timeout history and set
* the timeout back to BUILD_TIMEOUT_INITIAL_VALUE.
*/
-#define MAX_RECENT_TIMEOUT_COUNT (lround(RECENT_CIRCUITS*0.8))
+#define MAX_RECENT_TIMEOUT_COUNT (tor_lround(RECENT_CIRCUITS*0.8))
/** Information about the state of our local network connection */
typedef struct {
diff --git a/src/tools/Makefile.am b/src/tools/Makefile.am
index b1e8baf..0880668 100644
--- a/src/tools/Makefile.am
+++ b/src/tools/Makefile.am
@@ -3,16 +3,16 @@ noinst_PROGRAMS = tor-checkkey
tor_resolve_SOURCES = tor-resolve.c
tor_resolve_LDFLAGS = @TOR_LDFLAGS_libevent@
-tor_resolve_LDADD = ../common/libor.a @TOR_LIB_WS32@
+tor_resolve_LDADD = -lm ../common/libor.a @TOR_LIB_WS32@
tor_gencert_SOURCES = tor-gencert.c
tor_gencert_LDFLAGS = @TOR_LDFLAGS_zlib@ @TOR_LDFLAGS_openssl@ \
@TOR_LDFLAGS_libevent@
tor_gencert_LDADD = ../common/libor.a ../common/libor-crypto.a \
- -lz -lcrypto @TOR_LIB_WS32@ @TOR_LIB_GDI@
+ -lm -lz -lcrypto @TOR_LIB_WS32@ @TOR_LIB_GDI@
tor_checkkey_SOURCES = tor-checkkey.c
tor_checkkey_LDFLAGS = @TOR_LDFLAGS_zlib@ @TOR_LDFLAGS_openssl@ \
@TOR_LDFLAGS_libevent@
tor_checkkey_LDADD = ../common/libor.a ../common/libor-crypto.a \
- -lz -lcrypto @TOR_LIB_WS32@ @TOR_LIB_GDI@
+ -lm -lz -lcrypto @TOR_LIB_WS32@ @TOR_LIB_GDI@
--
1.5.6.5
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