tor-commits July 2016

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[tor/master] Add a function to simplify a fraction.
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 09c25697d74cdfdefe5fa365e4691cc9401e2129 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 11:23:34 2016 -0400 Add a function to simplify a fraction. Apparently remembering euclid's algorithm does pay off sooner or later. --- src/common/util.c | 23 +++++++++++++++++++++++ src/common/util.h | 2 ++ src/test/test_util.c | 26 ++++++++++++++++++++++++++ 3 files changed, 51 insertions(+) diff --git a/src/common/util.c b/src/common/util.c index d936156..5a73098 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -580,6 +580,29 @@ add_laplace_noise(int64_t signal, double random, double delta_f, return signal + noise; } +/* Helper: return greatest common divisor of a,b */ +static uint64_t +gcd64(uint64_t a, uint64_t b) +{ + while (b) { + uint64_t t = b; + b = a % b; + a = t; + } + return a; +} + +/* Given a fraction *numer / *denom, simplify it. + * Requires that the denominator is greater than 0. */ +void +simplify_fraction64(uint64_t *numer, uint64_t *denom) +{ + tor_assert(denom); + uint64_t gcd = gcd64(*numer, *denom); + *numer /= gcd; + *denom /= gcd; +} + /** Return the number of bits set in v. */ int n_bits_set_u8(uint8_t v) diff --git a/src/common/util.h b/src/common/util.h index a6638aa..9face0c 100644 --- a/src/common/util.h +++ b/src/common/util.h @@ -152,6 +152,8 @@ int64_t add_laplace_noise(int64_t signal, double random, double delta_f, double epsilon); int n_bits_set_u8(uint8_t v); int64_t clamp_double_to_int64(double number); +void simplify_fraction64(uint64_t *numer, uint64_t *denom); + /* Compute the CEIL of a divided by b, for nonnegative a * and positive b. Works on integer types only. Not defined if a+b can diff --git a/src/test/test_util.c b/src/test/test_util.c index 38df7bb..e173569 100644 --- a/src/test/test_util.c +++ b/src/test/test_util.c @@ -4657,6 +4657,31 @@ test_util_mathlog(void *arg) } static void +test_util_fraction(void *arg) +{ + uint64_t a,b; + (void)arg; + + a = 99; b = 30; + simplify_fraction64(&a,&b); + tt_u64_op(a, OP_EQ, 33); + tt_u64_op(b, OP_EQ, 10); + + a = 3000000; b = 10000000; + simplify_fraction64(&a,&b); + tt_u64_op(a, OP_EQ, 3); + tt_u64_op(b, OP_EQ, 10); + + a = 0; b = 15; + simplify_fraction64(&a,&b); + tt_u64_op(a, OP_EQ, 0); + tt_u64_op(b, OP_EQ, 1); + + done: + ; +} + +static void test_util_round_to_next_multiple_of(void *arg) { (void)arg; @@ -5479,6 +5504,7 @@ struct testcase_t util_tests[] = { UTIL_TEST(read_file_eof_zero_bytes, 0), UTIL_TEST(write_chunks_to_file, 0), UTIL_TEST(mathlog, 0), + UTIL_TEST(fraction, 0), UTIL_TEST(weak_random, 0), { "socket_ipv4", test_util_socket, TT_FORK, &passthrough_setup, (void*)"4" },

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[tor/master] fix identifier mistake :(
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 019b7ddb9f9599f7040b1477b47956626c88bb45 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 10:44:51 2016 -0400 fix identifier mistake :( --- src/common/compat_time.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index bdbf2b5..0d28439 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -484,7 +484,7 @@ monotime_diff_nsec(const monotime_t *start, #ifdef _WIN32 printf(I64_FORMAT" res\n", I64_PRINTF_ARG(result)); #endif - return res; + return result; } int64_t

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[tor/master] Redux^3: Temporarily add windows verbosity to track down jenkins failures
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 160d2c6aab6016b0e5774a3b909dd8c03bb2467a Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 08:56:55 2016 -0400 Redux^3: Temporarily add windows verbosity to track down jenkins failures --- src/common/compat_time.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index 1ff5cc1..bdbf2b5 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -471,20 +471,20 @@ int64_t monotime_diff_nsec(const monotime_t *start, const monotime_t *end) { -#ifdef _WIN32 - puts("m_d_n: 1"); -#endif if (BUG(monotime_initialized == 0)) { monotime_init(); } -#ifdef _WIN32 - puts("m_d_n: 2"); -#endif const int64_t diff_ticks = end->pcount_ - start->pcount_; #ifdef _WIN32 puts("m_d_n: 3"); + printf(I64_FORMAT" diff_ticks\n", I64_PRINTF_ARG(diff_ticks)); + printf(I64_FORMAT" ticks per second\n", I64_PRINTF_ARG(ticks_per_second)); +#endif + const int64_t result = (diff_ticks * ONE_BILLION) / ticks_per_second; +#ifdef _WIN32 + printf(I64_FORMAT" res\n", I64_PRINTF_ARG(result)); #endif - return (diff_ticks * ONE_BILLION) / ticks_per_second; + return res; } int64_t

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[tor/master] Redux^2: Temporarily add windows verbosity to track down jenkins failures
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 0cef69713c16f2ecf428c952cd909b484ed0212a Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 08:56:55 2016 -0400 Redux^2: Temporarily add windows verbosity to track down jenkins failures --- src/common/compat_time.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index da30a41..1ff5cc1 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -312,7 +312,7 @@ int64_t monotime_diff_nsec(const monotime_t *start, const monotime_t *end) { - if (BUG(mach_time_info.denom == 0)) { +n if (BUG(mach_time_info.denom == 0)) { monotime_init(); } const int64_t diff_ticks = end->abstime_ - start->abstime_; @@ -471,10 +471,19 @@ int64_t monotime_diff_nsec(const monotime_t *start, const monotime_t *end) { +#ifdef _WIN32 + puts("m_d_n: 1"); +#endif if (BUG(monotime_initialized == 0)) { monotime_init(); } +#ifdef _WIN32 + puts("m_d_n: 2"); +#endif const int64_t diff_ticks = end->pcount_ - start->pcount_; +#ifdef _WIN32 + puts("m_d_n: 3"); +#endif return (diff_ticks * ONE_BILLION) / ticks_per_second; } @@ -587,11 +596,20 @@ uint64_t monotime_absolute_nsec(void) { monotime_t now; +#ifdef _WIN32 + puts("m_a_n: 1"); +#endif if (BUG(monotime_initialized == 0)) { monotime_init(); } +#ifdef _WIN32 + puts("m_a_n: 2"); +#endif monotime_get(&now); +#ifdef _WIN32 + puts("m_a_n: 3"); +#endif return monotime_diff_nsec(&initialized_at, &now); }

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[tor/master] Fix integer overflow in the rate-limiter (#19435).
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 77459b97aac15949c5160ca8abb9af792f02ac73 Author: Ivan Markin <twim(a)riseup.net> Date: Fri Jun 17 03:44:58 2016 +0000 Fix integer overflow in the rate-limiter (#19435). --- changes/bug19435 | 6 ++++++ src/common/util.c | 14 ++++++++++++-- src/common/util.h | 1 + 3 files changed, 19 insertions(+), 2 deletions(-) diff --git a/changes/bug19435 b/changes/bug19435 new file mode 100644 index 0000000..ccd916b --- /dev/null +++ b/changes/bug19435 @@ -0,0 +1,6 @@ + o Major bugfixes (user interface): + - Fix an integer overflow in the rate-limiter that caused displaying of + wrong number of suppressed messages (if there are too many of them). + If the number of messages hits the limit of messages per interval the + rate-limiter drops a warning and doesn't count any further. + Fixes bug 19435. diff --git a/src/common/util.c b/src/common/util.c index 538aeb1..72efd89 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -1983,7 +1983,9 @@ update_approx_time(time_t now) /** If the rate-limiter lim is ready at now, return the number * of calls to rate_limit_is_ready (including this one!) since the last time - * rate_limit_is_ready returned nonzero. Otherwise return 0. */ + * rate_limit_is_ready returned nonzero. Otherwise return 0. + * If the call number hits RATELIM_TOOMANY limit, drop a warning + * about this event and stop counting. */ static int rate_limit_is_ready(ratelim_t *lim, time_t now) { @@ -1993,7 +1995,15 @@ rate_limit_is_ready(ratelim_t *lim, time_t now) lim->n_calls_since_last_time = 0; return res; } else { - ++lim->n_calls_since_last_time; + if (lim->n_calls_since_last_time < RATELIM_TOOMANY) { + ++lim->n_calls_since_last_time; + } else if (lim->n_calls_since_last_time == RATELIM_TOOMANY) { + log_warn(LD_GENERAL, + "Enormously large number of messages (%d). It's probably a bug.", + RATELIM_TOOMANY); + ++lim->n_calls_since_last_time; + } + return 0; } } diff --git a/src/common/util.h b/src/common/util.h index 0d48eac..837d2e9 100644 --- a/src/common/util.h +++ b/src/common/util.h @@ -292,6 +292,7 @@ typedef struct ratelim_t { } ratelim_t; #define RATELIM_INIT(r) { (r), 0, 0 } +#define RATELIM_TOOMANY (16*1000) char *rate_limit_log(ratelim_t *lim, time_t now);

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[tor/master] Tweaks on 19435 fix:
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit fb7f90c181dc44ae9f23cb4d16cac25609463d9f Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 09:59:48 2016 -0400 Tweaks on 19435 fix: * Raise limit: 16k isn't all that high. * Don't log when limit exceded; log later on. * Say "over" when we log more than we say we log. * Add target version to changes file --- changes/bug19435 | 4 ++-- src/common/util.c | 12 ++++-------- src/common/util.h | 2 +- 3 files changed, 7 insertions(+), 11 deletions(-) diff --git a/changes/bug19435 b/changes/bug19435 index ccd916b..d0a29d1 100644 --- a/changes/bug19435 +++ b/changes/bug19435 @@ -2,5 +2,5 @@ - Fix an integer overflow in the rate-limiter that caused displaying of wrong number of suppressed messages (if there are too many of them). If the number of messages hits the limit of messages per interval the - rate-limiter drops a warning and doesn't count any further. - Fixes bug 19435. + rate-limiter doesn't count any further. + Fixes bug 19435; bugfix on 0.2.4.11-alpha. diff --git a/src/common/util.c b/src/common/util.c index 72efd89..d936156 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -1995,12 +1995,7 @@ rate_limit_is_ready(ratelim_t *lim, time_t now) lim->n_calls_since_last_time = 0; return res; } else { - if (lim->n_calls_since_last_time < RATELIM_TOOMANY) { - ++lim->n_calls_since_last_time; - } else if (lim->n_calls_since_last_time == RATELIM_TOOMANY) { - log_warn(LD_GENERAL, - "Enormously large number of messages (%d). It's probably a bug.", - RATELIM_TOOMANY); + if (lim->n_calls_since_last_time <= RATELIM_TOOMANY) { ++lim->n_calls_since_last_time; } @@ -2020,11 +2015,12 @@ rate_limit_log(ratelim_t *lim, time_t now) return tor_strdup(""); } else { char *cp=NULL; + const char *opt_over = (n >= RATELIM_TOOMANY) ? "over " : ""; /* XXXX this is not exactly correct: the messages could have occurred * any time between the old value of lim->allowed and now. */ tor_asprintf(&cp, - " [%d similar message(s) suppressed in last %d seconds]", - n-1, lim->rate); + " [%s%d similar message(s) suppressed in last %d seconds]", + opt_over, n-1, lim->rate); return cp; } } else { diff --git a/src/common/util.h b/src/common/util.h index 837d2e9..a6638aa 100644 --- a/src/common/util.h +++ b/src/common/util.h @@ -292,7 +292,7 @@ typedef struct ratelim_t { } ratelim_t; #define RATELIM_INIT(r) { (r), 0, 0 } -#define RATELIM_TOOMANY (16*1000) +#define RATELIM_TOOMANY (16*1000*1000) char *rate_limit_log(ratelim_t *lim, time_t now);

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[tor/master] debugging: print ticks-per-second on windows. is it 0?
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 264fb7eb82f5df59247f1e2f4ea906fd9a0def61 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 09:44:41 2016 -0400 debugging: print ticks-per-second on windows. is it 0? --- src/common/compat_time.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index 9fac0bc..da30a41 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -404,6 +404,7 @@ monotime_init_internal(void) tor_assert(li.QuadPart); puts("win32-mii-6"); ticks_per_second = li.QuadPart; + printf(I64_FORMAT" ticks per second\n", I64_PRINTF_ARG(ticks_per_second)); last_pctr = 0; pctr_offset = 0;

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[tor/master] Redux: Temporarily add windows verbosity to track down jenkins failures
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit e77c23e455513ddb8f9fa5ad59f08fa1fa43cec6 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 08:56:55 2016 -0400 Redux: Temporarily add windows verbosity to track down jenkins failures --- src/test/test_util.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/src/test/test_util.c b/src/test/test_util.c index 38df7bb..2dfa109 100644 --- a/src/test/test_util.c +++ b/src/test/test_util.c @@ -5296,12 +5296,31 @@ test_util_monotonic_time(void *arg) uint64_t nsec1, nsec2, usec1, msec1; uint64_t nsecc1, nsecc2, usecc1, msecc1; +#ifdef _WIN32 + puts("Test-1"); +#endif + monotime_get(&mt1); +#ifdef _WIN32 + puts("Test-2"); +#endif monotime_coarse_get(&mtc1); +#ifdef _WIN32 + puts("Test-3"); +#endif nsec1 = monotime_absolute_nsec(); +#ifdef _WIN32 + puts("Test-4"); +#endif usec1 = monotime_absolute_usec(); msec1 = monotime_absolute_msec(); +#ifdef _WIN32 + puts("Test-5"); +#endif nsecc1 = monotime_coarse_absolute_nsec(); +#ifdef _WIN32 + puts("Test-6"); +#endif usecc1 = monotime_coarse_absolute_usec(); msecc1 = monotime_coarse_absolute_msec();

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[tor/master] Temporarily add some windows verbosity to track down unit test failure on jenkins.
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 1033713c9c2ef70be7caf847562cbb709ea7db29 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 08:56:55 2016 -0400 Temporarily add some windows verbosity to track down unit test failure on jenkins. --- src/common/compat_time.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index 4757225..9fac0bc 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -388,24 +388,33 @@ static GetTickCount64_fn_t GetTickCount64_fn = NULL; static void monotime_init_internal(void) { + puts("win32-mii-1"); tor_assert(!monotime_initialized); BOOL ok = InitializeCriticalSectionAndSpinCount(&monotime_lock, 200); tor_assert(ok); + puts("win32-mii-2"); ok = InitializeCriticalSectionAndSpinCount(&monotime_coarse_lock, 200); tor_assert(ok); + puts("win32-mii-3"); LARGE_INTEGER li; ok = QueryPerformanceFrequency(&li); + puts("win32-mii-4"); tor_assert(ok); + puts("win32-mii-5"); tor_assert(li.QuadPart); + puts("win32-mii-6"); ticks_per_second = li.QuadPart; last_pctr = 0; pctr_offset = 0; + puts("win32-mii-7"); HANDLE h = load_windows_system_library(TEXT("kernel32.dll")); + puts("win32-mii-8"); if (h) { GetTickCount64_fn = (GetTickCount64_fn_t) GetProcAddress(h, "GetTickCount64"); } + puts("win32-mii-9"); // FreeLibrary(h) ? } @@ -541,10 +550,19 @@ monotime_init(void) if (!monotime_initialized) { monotime_init_internal(); monotime_initialized = 1; +#ifdef _WIN32 + puts("mi-0"); +#endif monotime_get(&initialized_at); +#ifdef _WIN32 + puts("mi-1"); +#endif #ifdef MONOTIME_COARSE_FN_IS_DIFFERENT monotime_coarse_get(&initialized_at_coarse); #endif +#ifdef _WIN32 + puts("mi-2"); +#endif } }

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[tor/master] Try a little harder to work around mingw clock_gettime weirdness
by nickm＠torproject.org 26 Jul '16

26 Jul '16

commit 3f9c036821ee5b3c5f3958d7dc41d62a450da36e Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 26 08:22:23 2016 -0400 Try a little harder to work around mingw clock_gettime weirdness --- src/common/compat_time.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/common/compat_time.c b/src/common/compat_time.c index a50760e..4757225 100644 --- a/src/common/compat_time.c +++ b/src/common/compat_time.c @@ -13,7 +13,6 @@ #include "compat.h" #ifdef _WIN32 -#undef HAVE_CLOCK_GETTIME #include <winsock2.h> #include <windows.h> #endif @@ -45,6 +44,10 @@ #endif #endif +#ifdef _WIN32 +#undef HAVE_CLOCK_GETTIME +#endif + #ifdef TOR_UNIT_TESTS /** Delay for msec milliseconds. Only used in tests. */ void

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tor-commits July 2016