mirror of
https://github.com/isar/libmdbx.git
synced 2024-12-30 02:34:13 +08:00
mdbx-test: remove entropy source and use fully determined PRNG.
This commit is contained in:
Leonid Yuriev
parent
aec884f0d1
commit
cd73caac1c
@ -609,10 +609,6 @@ int main(int argc, char *const argv[]) {
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if (global::config::cleanup_before)
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cleanup();
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log_trace(">> probe entropy_ticks()");
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entropy_ticks();
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log_trace("<< probe entropy_ticks()");
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if (global::actors.size() == 1) {
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logging::setup("main");
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global::singlemode = true;
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@ -200,7 +200,7 @@ bool testcase_nested::trim_tail(unsigned window_width) {
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while (fifo.size() > window_width) {
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uint64_t tail_serial = fifo.back().first;
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const unsigned tail_count = fifo.back().second;
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log_verbose("nested: pop-tail (serial %" PRIu64 ", count %u)",
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log_verbose("nested: trim-tail (serial %" PRIu64 ", count %u)",
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tail_serial, tail_count);
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fifo.pop_back();
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for (unsigned n = 0; n < tail_count; ++n) {
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178
test/utils.cc
178
test/utils.cc
@ -101,164 +101,6 @@ bool is_samedata(const MDBX_val *a, const MDBX_val *b) {
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//-----------------------------------------------------------------------------
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/* TODO: replace my 'libmera' from t1ha. */
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uint64_t entropy_ticks(void) {
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#if defined(EMSCRIPTEN)
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return (uint64_t)emscripten_get_now();
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#endif /* EMSCRIPTEN */
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#if defined(__APPLE__) || defined(__MACH__)
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return mach_absolute_time();
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#endif /* defined(__APPLE__) || defined(__MACH__) */
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#if defined(__sun__) || defined(__sun)
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return gethrtime();
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#endif /* __sun__ */
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#if defined(__GNUC__) || defined(__clang__)
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#if defined(__ia64__)
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uint64_t ticks;
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__asm __volatile("mov %0=ar.itc" : "=r"(ticks));
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return ticks;
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#elif defined(__hppa__)
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uint64_t ticks;
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__asm __volatile("mfctl 16, %0" : "=r"(ticks));
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return ticks;
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#elif defined(__s390__)
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uint64_t ticks;
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__asm __volatile("stck 0(%0)" : : "a"(&(ticks)) : "memory", "cc");
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return ticks;
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#elif defined(__alpha__) || defined(__alpha)
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uint64_t ticks;
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__asm __volatile("rpcc %0" : "=r"(ticks));
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return ticks;
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#elif defined(__sparc__) || defined(__sparc) || defined(__sparc64__) || \
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defined(__sparc64) || defined(__sparc_v8plus__) || \
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defined(__sparc_v8plus) || defined(__sparc_v8plusa__) || \
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defined(__sparc_v8plusa) || defined(__sparc_v9__) || defined(__sparc_v9)
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union {
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uint64_t u64;
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struct {
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#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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uint32_t h, l;
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#else
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uint32_t l, h;
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#endif
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} u32;
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} cycles;
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#if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || \
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defined(__sparc_v9__) || defined(__sparc_v8plus) || \
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defined(__sparc_v8plusa) || defined(__sparc_v9)
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#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul || \
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defined(__sparc64__) || defined(__sparc64)
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__asm __volatile("rd %%tick, %0" : "=r"(cycles.u64));
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#else
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__asm __volatile("rd %%tick, %1; srlx %1, 32, %0"
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: "=r"(cycles.u32.h), "=r"(cycles.u32.l));
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#endif /* __sparc64__ */
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#else
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__asm __volatile(".byte 0x83, 0x41, 0x00, 0x00; mov %%g1, %0"
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: "=r"(cycles.u64)
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:
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: "%g1");
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#endif /* __sparc8plus__ || __sparc_v9__ */
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return cycles.u64;
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#elif (defined(__powerpc64__) || defined(__ppc64__) || defined(__ppc64) || \
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defined(__powerpc64))
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uint64_t ticks;
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__asm __volatile("mfspr %0, 268" : "=r"(ticks));
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return ticks;
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#elif (defined(__powerpc__) || defined(__ppc__) || defined(__powerpc) || \
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defined(__ppc))
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#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul
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uint64_t ticks;
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__asm __volatile("mftb %0" : "=r"(ticks));
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*now = ticks;
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#else
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uint64_t ticks;
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uint32_t low, high_before, high_after;
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__asm __volatile("mftbu %0; mftb %1; mftbu %2"
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: "=r"(high_before), "=r"(low), "=r"(high_after));
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ticks = (uint64_t)high_after << 32;
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ticks |= low & /* zeroes if high part has changed */
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~(high_before - high_after);
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#endif
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#elif (defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 7)) && \
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!defined(MDBX_SAFE4QEMU)
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uint64_t virtual_timer;
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__asm __volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer));
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return virtual_timer;
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#elif (defined(__ARM_ARCH) && __ARM_ARCH > 5 && __ARM_ARCH < 8) || \
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defined(_M_ARM)
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static uint32_t pmcntenset = 0x00425B00;
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if (unlikely(pmcntenset == 0x00425B00)) {
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uint32_t pmuseren;
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#ifdef _M_ARM
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pmuseren = _MoveFromCoprocessor(15, 0, 9, 14, 0);
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#else
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__asm("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
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#endif
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if (1 & pmuseren /* Is it allowed for user mode code? */) {
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#ifdef _M_ARM
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pmcntenset = _MoveFromCoprocessor(15, 0, 9, 12, 1);
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#else
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__asm("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
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#endif
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} else
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pmcntenset = 0;
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}
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if (pmcntenset & 0x80000000ul /* Is it counting? */) {
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#ifdef _M_ARM
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return __rdpmccntr64();
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#else
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uint32_t pmccntr;
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__asm __volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
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return pmccntr;
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#endif
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}
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#elif ((defined(_MIPS_ISA) && defined(_MIPS_ISA_MIPS2) && \
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_MIPS_ISA >= _MIPS_ISA_MIPS2) || \
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(defined(__mips) && __mips >= 2) || defined(_R4000)) && \
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!defined(MDBX_SAFE4QEMU) /* QEMU may not emulate the CC register \
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(High-resolution cycle counter) */
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unsigned count;
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__asm __volatile("rdhwr %0, $2" : "=r"(count));
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return count;
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#endif /* arch selector */
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#endif /* __GNUC__ || __clang__ */
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#if defined(__e2k__) || defined(__ia32__)
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return __rdtsc();
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#elif defined(_WIN32) || defined(_WIN64) || defined(_WINDOWS)
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LARGE_INTEGER PerformanceCount;
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if (QueryPerformanceCounter(&PerformanceCount))
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return PerformanceCount.QuadPart;
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return GetTickCount64();
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#else
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struct timespec ts;
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#if defined(CLOCK_MONOTONIC_COARSE)
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clockid_t clk_id = CLOCK_MONOTONIC_COARSE;
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#elif defined(CLOCK_MONOTONIC_RAW)
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clockid_t clk_id = CLOCK_MONOTONIC_RAW;
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#else
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clockid_t clk_id = CLOCK_MONOTONIC;
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#endif
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int rc = clock_gettime(clk_id, &ts);
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if (unlikely(rc))
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failure_perror("clock_gettime()", rc);
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return (((uint64_t)ts.tv_sec) << 32) + ts.tv_nsec;
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#endif
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}
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//-----------------------------------------------------------------------------
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uint64_t prng64_white(uint64_t &state) {
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state = prng64_map2_careless(state);
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return bleach64(state);
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@ -303,8 +145,6 @@ uint64_t prng64(void) { return prng64_white(prng_state); }
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void prng_fill(void *ptr, size_t bytes) { prng_fill(prng_state, ptr, bytes); }
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uint64_t entropy_white() { return bleach64(entropy_ticks()); }
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double double_from_lower(uint64_t salt) {
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#ifdef IEEE754_DOUBLE_BIAS
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ieee754_double r;
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@ -336,25 +176,25 @@ double double_from_upper(uint64_t salt) {
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#endif
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}
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bool flipcoin() { return bleach32((uint32_t)entropy_ticks()) & 1; }
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bool flipcoin_x2() { return (bleach32((uint32_t)entropy_ticks()) & 3) == 0; }
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bool flipcoin_x3() { return (bleach32((uint32_t)entropy_ticks()) & 7) == 0; }
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bool flipcoin_x4() { return (bleach32((uint32_t)entropy_ticks()) & 15) == 0; }
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bool flipcoin() { return prng32() & 1; }
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bool flipcoin_x2() { return (prng32() & 3) == 0; }
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bool flipcoin_x3() { return (prng32() & 7) == 0; }
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bool flipcoin_x4() { return (prng32() & 15) == 0; }
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bool flipcoin_n(unsigned n) {
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return (bleach64(entropy_ticks()) & ((UINT64_C(1) << n) - 1)) == 0;
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return (prng64() & ((UINT64_C(1) << n) - 1)) == 0;
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}
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bool jitter(unsigned probability_percent) {
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const uint32_t top = UINT32_MAX - UINT32_MAX % 100;
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uint32_t dice, edge = (top) / 100 * probability_percent;
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do
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dice = bleach32((uint32_t)entropy_ticks());
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dice = prng32();
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while (dice >= top);
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return dice < edge;
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}
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void jitter_delay(bool extra) {
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unsigned dice = entropy_white() & 3;
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unsigned dice = prng32() & 3;
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if (dice == 0) {
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log_trace("== jitter.no-delay");
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} else {
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@ -367,8 +207,8 @@ void jitter_delay(bool extra) {
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osal_yield();
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cpu_relax();
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if (dice > 2) {
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unsigned us = entropy_white() &
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(extra ? 0xffff /* 656 ms */ : 0x3ff /* 1 ms */);
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unsigned us =
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prng32() & (extra ? 0xffff /* 656 ms */ : 0x3ff /* 1 ms */);
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log_trace("== jitter.delay: %0.6f", us / 1000000.0);
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osal_udelay(us);
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}
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@ -292,8 +292,6 @@ inline bool is_samedata(const MDBX_val &a, const MDBX_val &b) {
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}
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std::string format(const char *fmt, ...);
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uint64_t entropy_ticks(void);
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uint64_t entropy_white(void);
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static inline uint64_t bleach64(uint64_t v) {
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// Tommy Ettinger, https://www.blogger.com/profile/04953541827437796598
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// http://mostlymangling.blogspot.com/2019/01/better-stronger-mixer-and-test-procedure.html
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