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Refactor a bit so that it is safe to include math.h, and mostly not needed.

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This commit is contained in:
Nick Mathewson 2009-12-15 14:32:55 -05:00
parent d086c9a7f7
commit e56747f9cf
7 changed files with 68 additions and 65 deletions
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2
src/common/log.c
View File

@ -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)

4
src/common/log.h
View File

@ -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;

49
src/common/util.c
View File

@ -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;
}

4
src/common/util.h
View File

@ -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);

61
src/or/circuitbuild.c
View File

@ -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");

7
src/or/or.h
View File

@ -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 {

6
src/tools/Makefile.am
View File

@ -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@