https://github.com/mozilla/gecko-dev
Tip revision: 02b4ae79b24aae2346b1338e2bf095a571192061 authored by Ryan VanderMeulen on 21 October 2019, 16:13:46 UTC
Bug 1590150 - Turn off ESR60 cron jobs. r=tomprince, a=release DONTBUILD
Bug 1590150 - Turn off ESR60 cron jobs. r=tomprince, a=release DONTBUILD
Tip revision: 02b4ae7
jsutil.cpp
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* Various JS utility functions. */
#include "jsutil.h"
#include "mozilla/Assertions.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Maybe.h"
#include "mozilla/PodOperations.h"
#include "mozilla/ThreadLocal.h"
#include <stdio.h>
#include "jstypes.h"
#include "js/Utility.h"
#include "util/Windows.h"
#include "vm/HelperThreads.h"
using namespace js;
using mozilla::CeilingLog2Size;
using mozilla::PodArrayZero;
#if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
/* For OOM testing functionality in Utility.h. */
namespace js {
mozilla::Atomic<AutoEnterOOMUnsafeRegion*> AutoEnterOOMUnsafeRegion::owner_;
namespace oom {
JS_PUBLIC_DATA uint32_t targetThread = 0;
MOZ_THREAD_LOCAL(uint32_t) threadType;
JS_PUBLIC_DATA uint64_t maxAllocations = UINT64_MAX;
JS_PUBLIC_DATA uint64_t counter = 0;
JS_PUBLIC_DATA bool failAlways = true;
JS_PUBLIC_DATA uint32_t stackTargetThread = 0;
JS_PUBLIC_DATA uint64_t maxStackChecks = UINT64_MAX;
JS_PUBLIC_DATA uint64_t stackCheckCounter = 0;
JS_PUBLIC_DATA bool stackCheckFailAlways = true;
JS_PUBLIC_DATA uint32_t interruptTargetThread = 0;
JS_PUBLIC_DATA uint64_t maxInterruptChecks = UINT64_MAX;
JS_PUBLIC_DATA uint64_t interruptCheckCounter = 0;
JS_PUBLIC_DATA bool interruptCheckFailAlways = true;
bool InitThreadType(void) { return threadType.init(); }
void SetThreadType(ThreadType type) { threadType.set(type); }
uint32_t GetThreadType(void) { return threadType.get(); }
static inline bool IsHelperThreadType(uint32_t thread) {
return thread != THREAD_TYPE_NONE && thread != THREAD_TYPE_COOPERATING;
}
void SimulateOOMAfter(uint64_t allocations, uint32_t thread, bool always) {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(targetThread) || IsHelperThreadType(thread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
MOZ_ASSERT(counter + allocations > counter);
MOZ_ASSERT(thread > js::THREAD_TYPE_NONE && thread < js::THREAD_TYPE_MAX);
targetThread = thread;
maxAllocations = counter + allocations;
failAlways = always;
}
void ResetSimulatedOOM() {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(targetThread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
targetThread = THREAD_TYPE_NONE;
maxAllocations = UINT64_MAX;
failAlways = false;
}
void SimulateStackOOMAfter(uint64_t checks, uint32_t thread, bool always) {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(stackTargetThread) || IsHelperThreadType(thread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
MOZ_ASSERT(stackCheckCounter + checks > stackCheckCounter);
MOZ_ASSERT(thread > js::THREAD_TYPE_NONE && thread < js::THREAD_TYPE_MAX);
stackTargetThread = thread;
maxStackChecks = stackCheckCounter + checks;
stackCheckFailAlways = always;
}
void ResetSimulatedStackOOM() {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(stackTargetThread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
stackTargetThread = THREAD_TYPE_NONE;
maxStackChecks = UINT64_MAX;
stackCheckFailAlways = false;
}
void SimulateInterruptAfter(uint64_t checks, uint32_t thread, bool always) {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(interruptTargetThread) || IsHelperThreadType(thread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
MOZ_ASSERT(interruptCheckCounter + checks > interruptCheckCounter);
MOZ_ASSERT(thread > js::THREAD_TYPE_NONE && thread < js::THREAD_TYPE_MAX);
interruptTargetThread = thread;
maxInterruptChecks = interruptCheckCounter + checks;
interruptCheckFailAlways = always;
}
void ResetSimulatedInterrupt() {
Maybe<AutoLockHelperThreadState> lock;
if (IsHelperThreadType(interruptTargetThread)) {
lock.emplace();
HelperThreadState().waitForAllThreadsLocked(lock.ref());
}
interruptTargetThread = THREAD_TYPE_NONE;
maxInterruptChecks = UINT64_MAX;
interruptCheckFailAlways = false;
}
} // namespace oom
} // namespace js
#endif // defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
JS_PUBLIC_DATA arena_id_t js::MallocArena;
void js::InitMallocAllocator() { MallocArena = moz_create_arena(); }
void js::ShutDownMallocAllocator() {
// Until Bug 1364359 is fixed it is unsafe to call moz_dispose_arena.
// moz_dispose_arena(MallocArena);
}
JS_PUBLIC_API void JS_Assert(const char* s, const char* file, int ln) {
MOZ_ReportAssertionFailure(s, file, ln);
MOZ_CRASH();
}
#ifdef __linux__
#include <malloc.h>
#include <stdlib.h>
namespace js {
// This function calls all the vanilla heap allocation functions. It is never
// called, and exists purely to help config/check_vanilla_allocations.py. See
// that script for more details.
extern MOZ_COLD void AllTheNonBasicVanillaNewAllocations() {
// posix_memalign and aligned_alloc aren't available on all Linux
// configurations.
// valloc was deprecated in Android 5.0
// char* q;
// posix_memalign((void**)&q, 16, 16);
intptr_t p = intptr_t(malloc(16)) + intptr_t(calloc(1, 16)) +
intptr_t(realloc(nullptr, 16)) + intptr_t(new char) +
intptr_t(new char) + intptr_t(new char) +
intptr_t(new char[16]) + intptr_t(memalign(16, 16)) +
// intptr_t(q) +
// intptr_t(aligned_alloc(16, 16)) +
// intptr_t(valloc(4096)) +
intptr_t(strdup("dummy"));
printf("%u\n", uint32_t(p)); // make sure |p| is not optimized away
free((int*)p); // this would crash if ever actually called
MOZ_CRASH();
}
} // namespace js
#endif // __linux__
#ifdef JS_BASIC_STATS
#include <math.h>
/*
* Histogram bins count occurrences of values <= the bin label, as follows:
*
* linear: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more
* 2**x: 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 or more
* 10**x: 0, 1, 10, 100, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9 or more
*
* We wish to count occurrences of 0 and 1 values separately, always.
*/
static uint32_t BinToVal(unsigned logscale, unsigned bin) {
MOZ_ASSERT(bin <= 10);
if (bin <= 1 || logscale == 0) return bin;
--bin;
if (logscale == 2) return JS_BIT(bin);
MOZ_ASSERT(logscale == 10);
return uint32_t(pow(10.0, (double)bin));
}
static unsigned ValToBin(unsigned logscale, uint32_t val) {
unsigned bin;
if (val <= 1) return val;
bin = (logscale == 10)
? (unsigned)ceil(log10((double)val))
: (logscale == 2) ? (unsigned)CeilingLog2Size(val) : val;
return Min(bin, 10U);
}
void JS_BasicStatsAccum(JSBasicStats* bs, uint32_t val) {
unsigned oldscale, newscale, bin;
double mean;
++bs->num;
if (bs->max < val) bs->max = val;
bs->sum += val;
bs->sqsum += (double)val * val;
oldscale = bs->logscale;
if (oldscale != 10) {
mean = bs->sum / bs->num;
if (bs->max > 16 && mean > 8) {
newscale = (bs->max > 1e6 && mean > 1000) ? 10 : 2;
if (newscale != oldscale) {
uint32_t newhist[11], newbin;
PodArrayZero(newhist);
for (bin = 0; bin <= 10; bin++) {
newbin = ValToBin(newscale, BinToVal(oldscale, bin));
newhist[newbin] += bs->hist[bin];
}
js_memcpy(bs->hist, newhist, sizeof bs->hist);
bs->logscale = newscale;
}
}
}
bin = ValToBin(bs->logscale, val);
++bs->hist[bin];
}
double JS_MeanAndStdDev(uint32_t num, double sum, double sqsum, double* sigma) {
double var;
if (num == 0 || sum == 0) {
*sigma = 0;
return 0;
}
var = num * sqsum - sum * sum;
if (var < 0 || num == 1)
var = 0;
else
var /= (double)num * (num - 1);
/* Windows says sqrt(0.0) is "-1.#J" (?!) so we must test. */
*sigma = (var != 0) ? sqrt(var) : 0;
return sum / num;
}
void JS_DumpBasicStats(JSBasicStats* bs, const char* title, FILE* fp) {
double mean, sigma;
mean = JS_MeanAndStdDevBS(bs, &sigma);
fprintf(fp, "\nmean %s %g, std. deviation %g, max %lu\n", title, mean, sigma,
(unsigned long)bs->max);
JS_DumpHistogram(bs, fp);
}
void JS_DumpHistogram(JSBasicStats* bs, FILE* fp) {
unsigned bin;
uint32_t cnt, max;
double sum, mean;
for (bin = 0, max = 0, sum = 0; bin <= 10; bin++) {
cnt = bs->hist[bin];
if (max < cnt) max = cnt;
sum += cnt;
}
mean = sum / cnt;
for (bin = 0; bin <= 10; bin++) {
unsigned val = BinToVal(bs->logscale, bin);
unsigned end = (bin == 10) ? 0 : BinToVal(bs->logscale, bin + 1);
cnt = bs->hist[bin];
if (val + 1 == end)
fprintf(fp, " [%6u]", val);
else if (end != 0)
fprintf(fp, "[%6u, %6u]", val, end - 1);
else
fprintf(fp, "[%6u, +inf]", val);
fprintf(fp, ": %8u ", cnt);
if (cnt != 0) {
if (max > 1e6 && mean > 1e3)
cnt = uint32_t(ceil(log10((double)cnt)));
else if (max > 16 && mean > 8)
cnt = CeilingLog2Size(cnt);
for (unsigned i = 0; i < cnt; i++) putc('*', fp);
}
putc('\n', fp);
}
}
#endif /* JS_BASIC_STATS */