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Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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UXP/xpcom/base/nsMemoryReporterManager.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsAtomTable.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsPrintfCString.h"
#include "nsServiceManagerUtils.h"
#include "nsMemoryReporterManager.h"
#include "nsITimer.h"
#include "nsThreadUtils.h"
#include "nsPIDOMWindow.h"
#include "nsIObserverService.h"
#include "nsIGlobalObject.h"
#include "nsIXPConnect.h"
#if defined(XP_UNIX) || defined(MOZ_DMD)
#include "nsMemoryInfoDumper.h"
#endif
#include "mozilla/Attributes.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Preferences.h"
#include "mozilla/Services.h"
#include "mozilla/Telemetry.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/dom/PMemoryReportRequestParent.h" // for dom::MemoryReport
#include "mozilla/dom/ContentParent.h"
#include "mozilla/ipc/FileDescriptorUtils.h"
#ifdef XP_WIN
#include <process.h>
#ifndef getpid
#define getpid _getpid
#endif
#else
#include <unistd.h>
#endif
using namespace mozilla;
#if defined(MOZ_MEMORY)
# define HAVE_JEMALLOC_STATS 1
# include "mozmemory.h"
#endif // MOZ_MEMORY
#if defined(XP_LINUX)
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
static MOZ_MUST_USE nsresult
GetProcSelfStatmField(int aField, int64_t* aN)
{
// There are more than two fields, but we're only interested in the first
// two.
static const int MAX_FIELD = 2;
size_t fields[MAX_FIELD];
MOZ_ASSERT(aField < MAX_FIELD, "bad field number");
FILE* f = fopen("/proc/self/statm", "r");
if (f) {
int nread = fscanf(f, "%zu %zu", &fields[0], &fields[1]);
fclose(f);
if (nread == MAX_FIELD) {
*aN = fields[aField] * getpagesize();
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
static MOZ_MUST_USE nsresult
GetProcSelfSmapsPrivate(int64_t* aN)
{
// You might be tempted to calculate USS by subtracting the "shared" value
// from the "resident" value in /proc/<pid>/statm. But at least on Linux,
// statm's "shared" value actually counts pages backed by files, which has
// little to do with whether the pages are actually shared. /proc/self/smaps
// on the other hand appears to give us the correct information.
FILE* f = fopen("/proc/self/smaps", "r");
if (NS_WARN_IF(!f)) {
return NS_ERROR_UNEXPECTED;
}
// We carry over the end of the buffer to the beginning to make sure we only
// interpret complete lines.
static const uint32_t carryOver = 32;
static const uint32_t readSize = 4096;
int64_t amount = 0;
char buffer[carryOver + readSize + 1];
// Fill the beginning of the buffer with spaces, as a sentinel for the first
// iteration.
memset(buffer, ' ', carryOver);
for (;;) {
size_t bytes = fread(buffer + carryOver, sizeof(*buffer), readSize, f);
char* end = buffer + bytes;
char* ptr = buffer;
end[carryOver] = '\0';
// We are looking for lines like "Private_{Clean,Dirty}: 4 kB".
while ((ptr = strstr(ptr, "Private"))) {
if (ptr >= end) {
break;
}
ptr += sizeof("Private_Xxxxx:");
amount += strtol(ptr, nullptr, 10);
}
if (bytes < readSize) {
// We do not expect any match within the end of the buffer.
MOZ_ASSERT(!strstr(end, "Private"));
break;
}
// Carry the end of the buffer over to the beginning.
memcpy(buffer, end, carryOver);
}
fclose(f);
// Convert from kB to bytes.
*aN = amount * 1024;
return NS_OK;
}
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static MOZ_MUST_USE nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
return GetProcSelfStatmField(0, aN);
}
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
return GetProcSelfStatmField(1, aN);
}
static MOZ_MUST_USE nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#define HAVE_RESIDENT_UNIQUE_REPORTER 1
static MOZ_MUST_USE nsresult
ResidentUniqueDistinguishedAmount(int64_t* aN)
{
return GetProcSelfSmapsPrivate(aN);
}
#ifdef HAVE_MALLINFO
#define HAVE_SYSTEM_HEAP_REPORTER 1
static MOZ_MUST_USE nsresult
SystemHeapSize(int64_t* aSizeOut)
{
struct mallinfo info = mallinfo();
// The documentation in the glibc man page makes it sound like |uordblks|
// would suffice, but that only gets the small allocations that are put in
// the brk heap. We need |hblkhd| as well to get the larger allocations
// that are mmapped.
//
// The fields in |struct mallinfo| are all |int|, <sigh>, so it is
// unreliable if memory usage gets high. However, the system heap size on
// Linux should usually be zero (so long as jemalloc is enabled) so that
// shouldn't be a problem. Nonetheless, cast the |int|s to |size_t| before
// adding them to provide a small amount of extra overflow protection.
*aSizeOut = size_t(info.hblkhd) + size_t(info.uordblks);
return NS_OK;
}
#endif
#elif defined(__DragonFly__) || defined(__FreeBSD__) \
|| defined(__NetBSD__) || defined(__OpenBSD__) \
|| defined(__FreeBSD_kernel__)
#include <sys/param.h>
#include <sys/sysctl.h>
#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <sys/user.h>
#endif
#include <unistd.h>
#if defined(__NetBSD__)
#undef KERN_PROC
#define KERN_PROC KERN_PROC2
#define KINFO_PROC struct kinfo_proc2
#else
#define KINFO_PROC struct kinfo_proc
#endif
#if defined(__DragonFly__)
#define KP_SIZE(kp) (kp.kp_vm_map_size)
#define KP_RSS(kp) (kp.kp_vm_rssize * getpagesize())
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#define KP_SIZE(kp) (kp.ki_size)
#define KP_RSS(kp) (kp.ki_rssize * getpagesize())
#elif defined(__NetBSD__)
#define KP_SIZE(kp) (kp.p_vm_msize * getpagesize())
#define KP_RSS(kp) (kp.p_vm_rssize * getpagesize())
#elif defined(__OpenBSD__)
#define KP_SIZE(kp) ((kp.p_vm_dsize + kp.p_vm_ssize \
+ kp.p_vm_tsize) * getpagesize())
#define KP_RSS(kp) (kp.p_vm_rssize * getpagesize())
#endif
static MOZ_MUST_USE nsresult
GetKinfoProcSelf(KINFO_PROC* aProc)
{
int mib[] = {
CTL_KERN,
KERN_PROC,
KERN_PROC_PID,
getpid(),
#if defined(__NetBSD__) || defined(__OpenBSD__)
sizeof(KINFO_PROC),
1,
#endif
};
u_int miblen = sizeof(mib) / sizeof(mib[0]);
size_t size = sizeof(KINFO_PROC);
if (sysctl(mib, miblen, aProc, &size, nullptr, 0)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static MOZ_MUST_USE nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
KINFO_PROC proc;
nsresult rv = GetKinfoProcSelf(&proc);
if (NS_SUCCEEDED(rv)) {
*aN = KP_SIZE(proc);
}
return rv;
}
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
KINFO_PROC proc;
nsresult rv = GetKinfoProcSelf(&proc);
if (NS_SUCCEEDED(rv)) {
*aN = KP_RSS(proc);
}
return rv;
}
static MOZ_MUST_USE nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#ifdef __FreeBSD__
#include <libutil.h>
#include <algorithm>
static MOZ_MUST_USE nsresult
GetKinfoVmentrySelf(int64_t* aPrss, uint64_t* aMaxreg)
{
int cnt;
struct kinfo_vmentry* vmmap;
struct kinfo_vmentry* kve;
if (!(vmmap = kinfo_getvmmap(getpid(), &cnt))) {
return NS_ERROR_FAILURE;
}
if (aPrss) {
*aPrss = 0;
}
if (aMaxreg) {
*aMaxreg = 0;
}
for (int i = 0; i < cnt; i++) {
kve = &vmmap[i];
if (aPrss) {
*aPrss += kve->kve_private_resident;
}
if (aMaxreg) {
*aMaxreg = std::max(*aMaxreg, kve->kve_end - kve->kve_start);
}
}
free(vmmap);
return NS_OK;
}
#define HAVE_PRIVATE_REPORTER 1
static MOZ_MUST_USE nsresult
PrivateDistinguishedAmount(int64_t* aN)
{
int64_t priv;
nsresult rv = GetKinfoVmentrySelf(&priv, nullptr);
NS_ENSURE_SUCCESS(rv, rv);
*aN = priv * getpagesize();
return NS_OK;
}
#define HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER 1
static MOZ_MUST_USE nsresult
VsizeMaxContiguousDistinguishedAmount(int64_t* aN)
{
uint64_t biggestRegion;
nsresult rv = GetKinfoVmentrySelf(nullptr, &biggestRegion);
if (NS_SUCCEEDED(rv)) {
*aN = biggestRegion;
}
return NS_OK;
}
#endif // FreeBSD
#elif defined(SOLARIS)
#include <procfs.h>
#include <fcntl.h>
#include <unistd.h>
static void
XMappingIter(int64_t& aVsize, int64_t& aResident)
{
aVsize = -1;
aResident = -1;
int mapfd = open("/proc/self/xmap", O_RDONLY);
struct stat st;
prxmap_t* prmapp = nullptr;
if (mapfd >= 0) {
if (!fstat(mapfd, &st)) {
int nmap = st.st_size / sizeof(prxmap_t);
while (1) {
// stat(2) on /proc/<pid>/xmap returns an incorrect value,
// prior to the release of Solaris 11.
// Here is a workaround for it.
nmap *= 2;
prmapp = (prxmap_t*)malloc((nmap + 1) * sizeof(prxmap_t));
if (!prmapp) {
// out of memory
break;
}
int n = pread(mapfd, prmapp, (nmap + 1) * sizeof(prxmap_t), 0);
if (n < 0) {
break;
}
if (nmap >= n / sizeof(prxmap_t)) {
aVsize = 0;
aResident = 0;
for (int i = 0; i < n / sizeof(prxmap_t); i++) {
aVsize += prmapp[i].pr_size;
aResident += prmapp[i].pr_rss * prmapp[i].pr_pagesize;
}
break;
}
free(prmapp);
}
free(prmapp);
}
close(mapfd);
}
}
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static MOZ_MUST_USE nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
int64_t vsize, resident;
XMappingIter(vsize, resident);
if (vsize == -1) {
return NS_ERROR_FAILURE;
}
*aN = vsize;
return NS_OK;
}
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
int64_t vsize, resident;
XMappingIter(vsize, resident);
if (resident == -1) {
return NS_ERROR_FAILURE;
}
*aN = resident;
return NS_OK;
}
static MOZ_MUST_USE nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#elif defined(XP_MACOSX)
#include <mach/mach_init.h>
#include <mach/mach_vm.h>
#include <mach/shared_region.h>
#include <mach/task.h>
#include <sys/sysctl.h>
static MOZ_MUST_USE bool
GetTaskBasicInfo(struct task_basic_info* aTi)
{
mach_msg_type_number_t count = TASK_BASIC_INFO_COUNT;
kern_return_t kr = task_info(mach_task_self(), TASK_BASIC_INFO,
(task_info_t)aTi, &count);
return kr == KERN_SUCCESS;
}
// The VSIZE figure on Mac includes huge amounts of shared memory and is always
// absurdly high, eg. 2GB+ even at start-up. But both 'top' and 'ps' report
// it, so we might as well too.
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static MOZ_MUST_USE nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
task_basic_info ti;
if (!GetTaskBasicInfo(&ti)) {
return NS_ERROR_FAILURE;
}
*aN = ti.virtual_size;
return NS_OK;
}
// If we're using jemalloc on Mac, we need to instruct jemalloc to purge the
// pages it has madvise(MADV_FREE)'d before we read our RSS in order to get
// an accurate result. The OS will take away MADV_FREE'd pages when there's
// memory pressure, so ideally, they shouldn't count against our RSS.
//
// Purging these pages can take a long time for some users (see bug 789975),
// so we provide the option to get the RSS without purging first.
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmountHelper(int64_t* aN, bool aDoPurge)
{
#ifdef HAVE_JEMALLOC_STATS
if (aDoPurge) {
Telemetry::AutoTimer<Telemetry::MEMORY_FREE_PURGED_PAGES_MS> timer;
jemalloc_purge_freed_pages();
}
#endif
task_basic_info ti;
if (!GetTaskBasicInfo(&ti)) {
return NS_ERROR_FAILURE;
}
*aN = ti.resident_size;
return NS_OK;
}
static MOZ_MUST_USE nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ false);
}
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ true);
}
#define HAVE_RESIDENT_UNIQUE_REPORTER 1
static bool
InSharedRegion(mach_vm_address_t aAddr, cpu_type_t aType)
{
mach_vm_address_t base;
mach_vm_address_t size;
switch (aType) {
case CPU_TYPE_ARM:
base = SHARED_REGION_BASE_ARM;
size = SHARED_REGION_SIZE_ARM;
break;
case CPU_TYPE_I386:
base = SHARED_REGION_BASE_I386;
size = SHARED_REGION_SIZE_I386;
break;
case CPU_TYPE_X86_64:
base = SHARED_REGION_BASE_X86_64;
size = SHARED_REGION_SIZE_X86_64;
break;
default:
return false;
}
return base <= aAddr && aAddr < (base + size);
}
static MOZ_MUST_USE nsresult
ResidentUniqueDistinguishedAmount(int64_t* aN)
{
if (!aN) {
return NS_ERROR_FAILURE;
}
cpu_type_t cpu_type;
size_t len = sizeof(cpu_type);
if (sysctlbyname("sysctl.proc_cputype", &cpu_type, &len, NULL, 0) != 0) {
return NS_ERROR_FAILURE;
}
// Roughly based on libtop_update_vm_regions in
// http://www.opensource.apple.com/source/top/top-100.1.2/libtop.c
size_t privatePages = 0;
mach_vm_size_t size = 0;
for (mach_vm_address_t addr = MACH_VM_MIN_ADDRESS; ; addr += size) {
vm_region_top_info_data_t info;
mach_msg_type_number_t infoCount = VM_REGION_TOP_INFO_COUNT;
mach_port_t objectName;
kern_return_t kr =
mach_vm_region(mach_task_self(), &addr, &size, VM_REGION_TOP_INFO,
reinterpret_cast<vm_region_info_t>(&info),
&infoCount, &objectName);
if (kr == KERN_INVALID_ADDRESS) {
// Done iterating VM regions.
break;
} else if (kr != KERN_SUCCESS) {
return NS_ERROR_FAILURE;
}
if (InSharedRegion(addr, cpu_type) && info.share_mode != SM_PRIVATE) {
continue;
}
switch (info.share_mode) {
case SM_LARGE_PAGE:
// NB: Large pages are not shareable and always resident.
case SM_PRIVATE:
privatePages += info.private_pages_resident;
privatePages += info.shared_pages_resident;
break;
case SM_COW:
privatePages += info.private_pages_resident;
if (info.ref_count == 1) {
// Treat copy-on-write pages as private if they only have one reference.
privatePages += info.shared_pages_resident;
}
break;
case SM_SHARED:
default:
break;
}
}
vm_size_t pageSize;
if (host_page_size(mach_host_self(), &pageSize) != KERN_SUCCESS) {
pageSize = PAGE_SIZE;
}
*aN = privatePages * pageSize;
return NS_OK;
}
#elif defined(XP_WIN)
#include <windows.h>
#include <psapi.h>
#include <algorithm>
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static MOZ_MUST_USE nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
MEMORYSTATUSEX s;
s.dwLength = sizeof(s);
if (!GlobalMemoryStatusEx(&s)) {
return NS_ERROR_FAILURE;
}
*aN = s.ullTotalVirtual - s.ullAvailVirtual;
return NS_OK;
}
static MOZ_MUST_USE nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
PROCESS_MEMORY_COUNTERS pmc;
pmc.cb = sizeof(PROCESS_MEMORY_COUNTERS);
if (!GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc))) {
return NS_ERROR_FAILURE;
}
*aN = pmc.WorkingSetSize;
return NS_OK;
}
static MOZ_MUST_USE nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#define HAVE_RESIDENT_UNIQUE_REPORTER 1
static MOZ_MUST_USE nsresult
ResidentUniqueDistinguishedAmount(int64_t* aN)
{
// Determine how many entries we need.
PSAPI_WORKING_SET_INFORMATION tmp;
DWORD tmpSize = sizeof(tmp);
memset(&tmp, 0, tmpSize);
HANDLE proc = GetCurrentProcess();
QueryWorkingSet(proc, &tmp, tmpSize);
// Fudge the size in case new entries are added between calls.
size_t entries = tmp.NumberOfEntries * 2;
if (!entries) {
return NS_ERROR_FAILURE;
}
DWORD infoArraySize = tmpSize + (entries * sizeof(PSAPI_WORKING_SET_BLOCK));
UniqueFreePtr<PSAPI_WORKING_SET_INFORMATION> infoArray(
static_cast<PSAPI_WORKING_SET_INFORMATION*>(malloc(infoArraySize)));
if (!infoArray) {
return NS_ERROR_FAILURE;
}
if (!QueryWorkingSet(proc, infoArray.get(), infoArraySize)) {
return NS_ERROR_FAILURE;
}
entries = static_cast<size_t>(infoArray->NumberOfEntries);
size_t privatePages = 0;
for (size_t i = 0; i < entries; i++) {
// Count shared pages that only one process is using as private.
if (!infoArray->WorkingSetInfo[i].Shared ||
infoArray->WorkingSetInfo[i].ShareCount <= 1) {
privatePages++;
}
}
SYSTEM_INFO si;
GetSystemInfo(&si);
*aN = privatePages * si.dwPageSize;
return NS_OK;
}
#define HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER 1
static MOZ_MUST_USE nsresult
VsizeMaxContiguousDistinguishedAmount(int64_t* aN)
{
SIZE_T biggestRegion = 0;
MEMORY_BASIC_INFORMATION vmemInfo = { 0 };
for (size_t currentAddress = 0; ; ) {
if (!VirtualQuery((LPCVOID)currentAddress, &vmemInfo, sizeof(vmemInfo))) {
// Something went wrong, just return whatever we've got already.
break;
}
if (vmemInfo.State == MEM_FREE) {
biggestRegion = std::max(biggestRegion, vmemInfo.RegionSize);
}
SIZE_T lastAddress = currentAddress;
currentAddress += vmemInfo.RegionSize;
// If we overflow, we've examined all of the address space.
if (currentAddress < lastAddress) {
break;
}
}
*aN = biggestRegion;
return NS_OK;
}
#define HAVE_PRIVATE_REPORTER 1
static MOZ_MUST_USE nsresult
PrivateDistinguishedAmount(int64_t* aN)
{
PROCESS_MEMORY_COUNTERS_EX pmcex;
pmcex.cb = sizeof(PROCESS_MEMORY_COUNTERS_EX);
if (!GetProcessMemoryInfo(GetCurrentProcess(),
(PPROCESS_MEMORY_COUNTERS) &pmcex, sizeof(pmcex))) {
return NS_ERROR_FAILURE;
}
*aN = pmcex.PrivateUsage;
return NS_OK;
}
#define HAVE_SYSTEM_HEAP_REPORTER 1
// Windows can have multiple separate heaps. During testing there were multiple
// heaps present but the non-default ones had sizes no more than a few 10s of
// KiBs. So we combine their sizes into a single measurement.
static MOZ_MUST_USE nsresult
SystemHeapSize(int64_t* aSizeOut)
{
// Get the number of heaps.
DWORD nHeaps = GetProcessHeaps(0, nullptr);
NS_ENSURE_TRUE(nHeaps != 0, NS_ERROR_FAILURE);
// Get handles to all heaps, checking that the number of heaps hasn't
// changed in the meantime.
UniquePtr<HANDLE[]> heaps(new HANDLE[nHeaps]);
DWORD nHeaps2 = GetProcessHeaps(nHeaps, heaps.get());
NS_ENSURE_TRUE(nHeaps2 != 0 && nHeaps2 == nHeaps, NS_ERROR_FAILURE);
// Lock and iterate over each heap to get its size.
int64_t heapsSize = 0;
for (DWORD i = 0; i < nHeaps; i++) {
HANDLE heap = heaps[i];
NS_ENSURE_TRUE(HeapLock(heap), NS_ERROR_FAILURE);
int64_t heapSize = 0;
PROCESS_HEAP_ENTRY entry;
entry.lpData = nullptr;
while (HeapWalk(heap, &entry)) {
// We don't count entry.cbOverhead, because we just want to measure the
// space available to the program.
if (entry.wFlags & PROCESS_HEAP_ENTRY_BUSY) {
heapSize += entry.cbData;
}
}
// Check this result only after unlocking the heap, so that we don't leave
// the heap locked if there was an error.
DWORD lastError = GetLastError();
// I have no idea how things would proceed if unlocking this heap failed...
NS_ENSURE_TRUE(HeapUnlock(heap), NS_ERROR_FAILURE);
NS_ENSURE_TRUE(lastError == ERROR_NO_MORE_ITEMS, NS_ERROR_FAILURE);
heapsSize += heapSize;
}
*aSizeOut = heapsSize;
return NS_OK;
}
struct SegmentKind
{
DWORD mState;
DWORD mType;
DWORD mProtect;
int mIsStack;
};
struct SegmentEntry : public PLDHashEntryHdr
{
static PLDHashNumber HashKey(const void* aKey)
{
auto kind = static_cast<const SegmentKind*>(aKey);
return mozilla::HashGeneric(kind->mState, kind->mType, kind->mProtect,
kind->mIsStack);
}
static bool MatchEntry(const PLDHashEntryHdr* aEntry, const void* aKey)
{
auto kind = static_cast<const SegmentKind*>(aKey);
auto entry = static_cast<const SegmentEntry*>(aEntry);
return kind->mState == entry->mKind.mState &&
kind->mType == entry->mKind.mType &&
kind->mProtect == entry->mKind.mProtect &&
kind->mIsStack == entry->mKind.mIsStack;
}
static void InitEntry(PLDHashEntryHdr* aEntry, const void* aKey)
{
auto kind = static_cast<const SegmentKind*>(aKey);
auto entry = static_cast<SegmentEntry*>(aEntry);
entry->mKind = *kind;
entry->mCount = 0;
entry->mSize = 0;
}
static const PLDHashTableOps Ops;
SegmentKind mKind; // The segment kind.
uint32_t mCount; // The number of segments of this kind.
size_t mSize; // The combined size of segments of this kind.
};
/* static */ const PLDHashTableOps SegmentEntry::Ops = {
SegmentEntry::HashKey,
SegmentEntry::MatchEntry,
PLDHashTable::MoveEntryStub,
PLDHashTable::ClearEntryStub,
SegmentEntry::InitEntry
};
class WindowsAddressSpaceReporter final : public nsIMemoryReporter
{
~WindowsAddressSpaceReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
// First iterate over all the segments and record how many of each kind
// there were and their aggregate sizes. We use a hash table for this
// because there are a couple of dozen different kinds possible.
PLDHashTable table(&SegmentEntry::Ops, sizeof(SegmentEntry));
MEMORY_BASIC_INFORMATION info = { 0 };
bool isPrevSegStackGuard = false;
for (size_t currentAddress = 0; ; ) {
if (!VirtualQuery((LPCVOID)currentAddress, &info, sizeof(info))) {
// Something went wrong, just return whatever we've got already.
break;
}
size_t size = info.RegionSize;
// Note that |type| and |protect| are ignored in some cases.
DWORD state = info.State;
DWORD type =
(state == MEM_RESERVE || state == MEM_COMMIT) ? info.Type : 0;
DWORD protect = (state == MEM_COMMIT) ? info.Protect : 0;
bool isStack = isPrevSegStackGuard &&
state == MEM_COMMIT &&
type == MEM_PRIVATE &&
protect == PAGE_READWRITE;
SegmentKind kind = { state, type, protect, isStack ? 1 : 0 };
auto entry =
static_cast<SegmentEntry*>(table.Add(&kind, mozilla::fallible));
if (entry) {
entry->mCount += 1;
entry->mSize += size;
}
isPrevSegStackGuard = info.State == MEM_COMMIT &&
info.Type == MEM_PRIVATE &&
info.Protect == (PAGE_READWRITE|PAGE_GUARD);
size_t lastAddress = currentAddress;
currentAddress += size;
// If we overflow, we've examined all of the address space.
if (currentAddress < lastAddress) {
break;
}
}
// Then iterate over the hash table and report the details for each segment
// kind.
for (auto iter = table.Iter(); !iter.Done(); iter.Next()) {
// For each range of pages, we consider one or more of its State, Type
// and Protect values. These are documented at
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366775%28v=vs.85%29.aspx
// (for State and Type) and
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366786%28v=vs.85%29.aspx
// (for Protect).
//
// Not all State values have accompanying Type and Protection values.
bool doType = false;
bool doProtect = false;
auto entry = static_cast<const SegmentEntry*>(iter.Get());
nsCString path("address-space");
switch (entry->mKind.mState) {
case MEM_FREE:
path.AppendLiteral("/free");
break;
case MEM_RESERVE:
path.AppendLiteral("/reserved");
doType = true;
break;
case MEM_COMMIT:
path.AppendLiteral("/commit");
doType = true;
doProtect = true;
break;
default:
// Should be impossible, but handle it just in case.
path.AppendLiteral("/???");
break;
}
if (doType) {
switch (entry->mKind.mType) {
case MEM_IMAGE:
path.AppendLiteral("/image");
break;
case MEM_MAPPED:
path.AppendLiteral("/mapped");
break;
case MEM_PRIVATE:
path.AppendLiteral("/private");
break;
default:
// Should be impossible, but handle it just in case.
path.AppendLiteral("/???");
break;
}
}
if (doProtect) {
DWORD protect = entry->mKind.mProtect;
// Basic attributes. Exactly one of these should be set.
if (protect & PAGE_EXECUTE) {
path.AppendLiteral("/execute");
}
if (protect & PAGE_EXECUTE_READ) {
path.AppendLiteral("/execute-read");
}
if (protect & PAGE_EXECUTE_READWRITE) {
path.AppendLiteral("/execute-readwrite");
}
if (protect & PAGE_EXECUTE_WRITECOPY) {
path.AppendLiteral("/execute-writecopy");
}
if (protect & PAGE_NOACCESS) {
path.AppendLiteral("/noaccess");
}
if (protect & PAGE_READONLY) {
path.AppendLiteral("/readonly");
}
if (protect & PAGE_READWRITE) {
path.AppendLiteral("/readwrite");
}
if (protect & PAGE_WRITECOPY) {
path.AppendLiteral("/writecopy");
}
// Modifiers. At most one of these should be set.
if (protect & PAGE_GUARD) {
path.AppendLiteral("+guard");
}
if (protect & PAGE_NOCACHE) {
path.AppendLiteral("+nocache");
}
if (protect & PAGE_WRITECOMBINE) {
path.AppendLiteral("+writecombine");
}
// Annotate likely stack segments, too.
if (entry->mKind.mIsStack) {
path.AppendLiteral("+stack");
}
}
// Append the segment count.
path.AppendPrintf("(segments=%u)", entry->mCount);
aHandleReport->Callback(
EmptyCString(), path, KIND_OTHER, UNITS_BYTES, entry->mSize,
NS_LITERAL_CSTRING("From MEMORY_BASIC_INFORMATION."), aData);
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(WindowsAddressSpaceReporter, nsIMemoryReporter)
#endif // XP_<PLATFORM>
#ifdef HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER
class VsizeMaxContiguousReporter final : public nsIMemoryReporter
{
~VsizeMaxContiguousReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
if (NS_SUCCEEDED(VsizeMaxContiguousDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"vsize-max-contiguous", KIND_OTHER, UNITS_BYTES, amount,
"Size of the maximum contiguous block of available virtual memory.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(VsizeMaxContiguousReporter, nsIMemoryReporter)
#endif
#ifdef HAVE_PRIVATE_REPORTER
class PrivateReporter final : public nsIMemoryReporter
{
~PrivateReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
if (NS_SUCCEEDED(PrivateDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"private", KIND_OTHER, UNITS_BYTES, amount,
"Memory that cannot be shared with other processes, including memory that is "
"committed and marked MEM_PRIVATE, data that is not mapped, and executable "
"pages that have been written to.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(PrivateReporter, nsIMemoryReporter)
#endif
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
class VsizeReporter final : public nsIMemoryReporter
{
~VsizeReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
if (NS_SUCCEEDED(VsizeDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"vsize", KIND_OTHER, UNITS_BYTES, amount,
"Memory mapped by the process, including code and data segments, the heap, "
"thread stacks, memory explicitly mapped by the process via mmap and similar "
"operations, and memory shared with other processes. This is the vsize figure "
"as reported by 'top' and 'ps'. This figure is of limited use on Mac, where "
"processes share huge amounts of memory with one another. But even on other "
"operating systems, 'resident' is a much better measure of the memory "
"resources used by the process.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(VsizeReporter, nsIMemoryReporter)
class ResidentReporter final : public nsIMemoryReporter
{
~ResidentReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
if (NS_SUCCEEDED(ResidentDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"resident", KIND_OTHER, UNITS_BYTES, amount,
"Memory mapped by the process that is present in physical memory, also known "
"as the resident set size (RSS). This is the best single figure to use when "
"considering the memory resources used by the process, but it depends both on "
"other processes being run and details of the OS kernel and so is best used "
"for comparing the memory usage of a single process at different points in "
"time.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ResidentReporter, nsIMemoryReporter)
#endif // HAVE_VSIZE_AND_RESIDENT_REPORTERS
#ifdef HAVE_RESIDENT_UNIQUE_REPORTER
class ResidentUniqueReporter final : public nsIMemoryReporter
{
~ResidentUniqueReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
if (NS_SUCCEEDED(ResidentUniqueDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"resident-unique", KIND_OTHER, UNITS_BYTES, amount,
"Memory mapped by the process that is present in physical memory and not "
"shared with any other processes. This is also known as the process's unique "
"set size (USS). This is the amount of RAM we'd expect to be freed if we "
"closed this process.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ResidentUniqueReporter, nsIMemoryReporter)
#endif // HAVE_RESIDENT_UNIQUE_REPORTER
#ifdef HAVE_SYSTEM_HEAP_REPORTER
class SystemHeapReporter final : public nsIMemoryReporter
{
~SystemHeapReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
if (NS_SUCCEEDED(SystemHeapSize(&amount))) {
MOZ_COLLECT_REPORT(
"system-heap-allocated", KIND_OTHER, UNITS_BYTES, amount,
"Memory used by the system allocator that is currently allocated to the "
"application. This is distinct from the jemalloc heap that Firefox uses for "
"most or all of its heap allocations. Ideally this number is zero, but "
"on some platforms we cannot force every heap allocation through jemalloc.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(SystemHeapReporter, nsIMemoryReporter)
#endif // HAVE_SYSTEM_HEAP_REPORTER
#ifdef XP_UNIX
#include <sys/resource.h>
#define HAVE_RESIDENT_PEAK_REPORTER 1
static MOZ_MUST_USE nsresult
ResidentPeakDistinguishedAmount(int64_t* aN)
{
struct rusage usage;
if (0 == getrusage(RUSAGE_SELF, &usage)) {
// The units for ru_maxrrs:
// - Mac: bytes
// - Solaris: pages? But some sources it actually always returns 0, so
// check for that
// - Linux, {Net/Open/Free}BSD, DragonFly: KiB
#ifdef XP_MACOSX
*aN = usage.ru_maxrss;
#elif defined(SOLARIS)
*aN = usage.ru_maxrss * getpagesize();
#else
*aN = usage.ru_maxrss * 1024;
#endif
if (*aN > 0) {
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
class ResidentPeakReporter final : public nsIMemoryReporter
{
~ResidentPeakReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
if (NS_SUCCEEDED(ResidentPeakDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"resident-peak", KIND_OTHER, UNITS_BYTES, amount,
"The peak 'resident' value for the lifetime of the process.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ResidentPeakReporter, nsIMemoryReporter)
#define HAVE_PAGE_FAULT_REPORTERS 1
class PageFaultsSoftReporter final : public nsIMemoryReporter
{
~PageFaultsSoftReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
struct rusage usage;
int err = getrusage(RUSAGE_SELF, &usage);
if (err == 0) {
int64_t amount = usage.ru_minflt;
MOZ_COLLECT_REPORT(
"page-faults-soft", KIND_OTHER, UNITS_COUNT_CUMULATIVE, amount,
"The number of soft page faults (also known as 'minor page faults') that "
"have occurred since the process started. A soft page fault occurs when the "
"process tries to access a page which is present in physical memory but is "
"not mapped into the process's address space. For instance, a process might "
"observe soft page faults when it loads a shared library which is already "
"present in physical memory. A process may experience many thousands of soft "
"page faults even when the machine has plenty of available physical memory, "
"and because the OS services a soft page fault without accessing the disk, "
"they impact performance much less than hard page faults.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(PageFaultsSoftReporter, nsIMemoryReporter)
static MOZ_MUST_USE nsresult
PageFaultsHardDistinguishedAmount(int64_t* aAmount)
{
struct rusage usage;
int err = getrusage(RUSAGE_SELF, &usage);
if (err != 0) {
return NS_ERROR_FAILURE;
}
*aAmount = usage.ru_majflt;
return NS_OK;
}
class PageFaultsHardReporter final : public nsIMemoryReporter
{
~PageFaultsHardReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
if (NS_SUCCEEDED(PageFaultsHardDistinguishedAmount(&amount))) {
MOZ_COLLECT_REPORT(
"page-faults-hard", KIND_OTHER, UNITS_COUNT_CUMULATIVE, amount,
"The number of hard page faults (also known as 'major page faults') that have "
"occurred since the process started. A hard page fault occurs when a process "
"tries to access a page which is not present in physical memory. The "
"operating system must access the disk in order to fulfill a hard page fault. "
"When memory is plentiful, you should see very few hard page faults. But if "
"the process tries to use more memory than your machine has available, you "
"may see many thousands of hard page faults. Because accessing the disk is up "
"to a million times slower than accessing RAM, the program may run very "
"slowly when it is experiencing more than 100 or so hard page faults a "
"second.");
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(PageFaultsHardReporter, nsIMemoryReporter)
#endif // XP_UNIX
/**
** memory reporter implementation for jemalloc and OSX malloc,
** to obtain info on total memory in use (that we know about,
** at least -- on OSX, there are sometimes other zones in use).
**/
#ifdef HAVE_JEMALLOC_STATS
static size_t
HeapOverhead(jemalloc_stats_t* aStats)
{
return aStats->waste + aStats->bookkeeping +
aStats->page_cache + aStats->bin_unused;
}
// This has UNITS_PERCENTAGE, so it is multiplied by 100x *again* on top of the
// 100x for the percentage.
static int64_t
HeapOverheadFraction(jemalloc_stats_t* aStats)
{
size_t heapOverhead = HeapOverhead(aStats);
size_t heapCommitted = aStats->allocated + heapOverhead;
return int64_t(10000 * (heapOverhead / (double)heapCommitted));
}
class JemallocHeapReporter final : public nsIMemoryReporter
{
~JemallocHeapReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
jemalloc_stats_t stats;
jemalloc_stats(&stats);
MOZ_COLLECT_REPORT(
"heap-committed/allocated", KIND_OTHER, UNITS_BYTES, stats.allocated,
"Memory mapped by the heap allocator that is currently allocated to the "
"application. This may exceed the amount of memory requested by the "
"application because the allocator regularly rounds up request sizes. (The "
"exact amount requested is not recorded.)");
MOZ_COLLECT_REPORT(
"heap-allocated", KIND_OTHER, UNITS_BYTES, stats.allocated,
"The same as 'heap-committed/allocated'.");
// We mark this and the other heap-overhead reporters as KIND_NONHEAP
// because KIND_HEAP memory means "counted in heap-allocated", which
// this is not.
MOZ_COLLECT_REPORT(
"explicit/heap-overhead/bin-unused", KIND_NONHEAP, UNITS_BYTES,
stats.bin_unused,
"Unused bytes due to fragmentation in the bins used for 'small' (<= 2 KiB) "
"allocations. These bytes will be used if additional allocations occur.");
if (stats.waste > 0) {
MOZ_COLLECT_REPORT(
"explicit/heap-overhead/waste", KIND_NONHEAP, UNITS_BYTES,
stats.waste,
"Committed bytes which do not correspond to an active allocation and which the "
"allocator is not intentionally keeping alive (i.e., not "
"'explicit/heap-overhead/{bookkeeping,page-cache,bin-unused}').");
}
MOZ_COLLECT_REPORT(
"explicit/heap-overhead/bookkeeping", KIND_NONHEAP, UNITS_BYTES,
stats.bookkeeping,
"Committed bytes which the heap allocator uses for internal data structures.");
MOZ_COLLECT_REPORT(
"explicit/heap-overhead/page-cache", KIND_NONHEAP, UNITS_BYTES,
stats.page_cache,
"Memory which the allocator could return to the operating system, but hasn't. "
"The allocator keeps this memory around as an optimization, so it doesn't "
"have to ask the OS the next time it needs to fulfill a request. This value "
"is typically not larger than a few megabytes.");
MOZ_COLLECT_REPORT(
"heap-committed/overhead", KIND_OTHER, UNITS_BYTES,
HeapOverhead(&stats),
"The sum of 'explicit/heap-overhead/*'.");
MOZ_COLLECT_REPORT(
"heap-mapped", KIND_OTHER, UNITS_BYTES, stats.mapped,
"Amount of memory currently mapped. Includes memory that is uncommitted, i.e. "
"neither in physical memory nor paged to disk.");
MOZ_COLLECT_REPORT(
"heap-chunksize", KIND_OTHER, UNITS_BYTES, stats.chunksize,
"Size of chunks.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(JemallocHeapReporter, nsIMemoryReporter)
#endif // HAVE_JEMALLOC_STATS
// Why is this here? At first glance, you'd think it could be defined and
// registered with nsMemoryReporterManager entirely within nsAtomTable.cpp.
// However, the obvious time to register it is when the table is initialized,
// and that happens before XPCOM components are initialized, which means the
// RegisterStrongMemoryReporter call fails. So instead we do it here.
class AtomTablesReporter final : public nsIMemoryReporter
{
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
~AtomTablesReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
size_t Main, Static;
NS_SizeOfAtomTablesIncludingThis(MallocSizeOf, &Main, &Static);
MOZ_COLLECT_REPORT(
"explicit/atom-tables/main", KIND_HEAP, UNITS_BYTES, Main,
"Memory used by the main atoms table.");
MOZ_COLLECT_REPORT(
"explicit/atom-tables/static", KIND_HEAP, UNITS_BYTES, Static,
"Memory used by the static atoms table.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(AtomTablesReporter, nsIMemoryReporter)
#ifdef DEBUG
// Ideally, this would be implemented in BlockingResourceBase.cpp.
// However, this ends up breaking the linking step of various unit tests due
// to adding a new dependency to libdmd for a commonly used feature (mutexes)
// in DMD builds. So instead we do it here.
class DeadlockDetectorReporter final : public nsIMemoryReporter
{
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
~DeadlockDetectorReporter() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
MOZ_COLLECT_REPORT(
"explicit/deadlock-detector", KIND_HEAP, UNITS_BYTES,
BlockingResourceBase::SizeOfDeadlockDetector(MallocSizeOf),
"Memory used by the deadlock detector.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(DeadlockDetectorReporter, nsIMemoryReporter)
#endif
#ifdef MOZ_DMD
namespace mozilla {
namespace dmd {
class DMDReporter final : public nsIMemoryReporter
{
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
dmd::Sizes sizes;
dmd::SizeOf(&sizes);
MOZ_COLLECT_REPORT(
"explicit/dmd/stack-traces/used", KIND_HEAP, UNITS_BYTES,
sizes.mStackTracesUsed,
"Memory used by stack traces which correspond to at least "
"one heap block DMD is tracking.");
MOZ_COLLECT_REPORT(
"explicit/dmd/stack-traces/unused", KIND_HEAP, UNITS_BYTES,
sizes.mStackTracesUnused,
"Memory used by stack traces which don't correspond to any heap "
"blocks DMD is currently tracking.");
MOZ_COLLECT_REPORT(
"explicit/dmd/stack-traces/table", KIND_HEAP, UNITS_BYTES,
sizes.mStackTraceTable,
"Memory used by DMD's stack trace table.");
MOZ_COLLECT_REPORT(
"explicit/dmd/live-block-table", KIND_HEAP, UNITS_BYTES,
sizes.mLiveBlockTable,
"Memory used by DMD's live block table.");
MOZ_COLLECT_REPORT(
"explicit/dmd/dead-block-list", KIND_HEAP, UNITS_BYTES,
sizes.mDeadBlockTable,
"Memory used by DMD's dead block list.");
return NS_OK;
}
private:
~DMDReporter() {}
};
NS_IMPL_ISUPPORTS(DMDReporter, nsIMemoryReporter)
} // namespace dmd
} // namespace mozilla
#endif // MOZ_DMD
/**
** nsMemoryReporterManager implementation
**/
NS_IMPL_ISUPPORTS(nsMemoryReporterManager, nsIMemoryReporterManager)
NS_IMETHODIMP
nsMemoryReporterManager::Init()
{
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
// Under normal circumstances this function is only called once. However,
// we've (infrequently) seen memory report dumps in crash reports that
// suggest that this function is sometimes called multiple times. That in
// turn means that multiple reporters of each kind are registered, which
// leads to duplicated reports of individual measurements such as "resident",
// "vsize", etc.
//
// It's unclear how these multiple calls can occur. The only plausible theory
// so far is badly-written extensions, because this function is callable from
// JS code via nsIMemoryReporter.idl.
//
// Whatever the cause, it's a bad thing. So we protect against it with the
// following check.
static bool isInited = false;
if (isInited) {
NS_WARNING("nsMemoryReporterManager::Init() has already been called!");
return NS_OK;
}
isInited = true;
#if defined(HAVE_JEMALLOC_STATS) && defined(MOZ_GLUE_IN_PROGRAM)
if (!jemalloc_stats) {
return NS_ERROR_FAILURE;
}
#endif
#ifdef HAVE_JEMALLOC_STATS
RegisterStrongReporter(new JemallocHeapReporter());
#endif
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
RegisterStrongReporter(new VsizeReporter());
RegisterStrongReporter(new ResidentReporter());
#endif
#ifdef HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER
RegisterStrongReporter(new VsizeMaxContiguousReporter());
#endif
#ifdef HAVE_RESIDENT_PEAK_REPORTER
RegisterStrongReporter(new ResidentPeakReporter());
#endif
#ifdef HAVE_RESIDENT_UNIQUE_REPORTER
RegisterStrongReporter(new ResidentUniqueReporter());
#endif
#ifdef HAVE_PAGE_FAULT_REPORTERS
RegisterStrongReporter(new PageFaultsSoftReporter());
RegisterStrongReporter(new PageFaultsHardReporter());
#endif
#ifdef HAVE_PRIVATE_REPORTER
RegisterStrongReporter(new PrivateReporter());
#endif
#ifdef HAVE_SYSTEM_HEAP_REPORTER
RegisterStrongReporter(new SystemHeapReporter());
#endif
RegisterStrongReporter(new AtomTablesReporter());
#ifdef DEBUG
RegisterStrongReporter(new DeadlockDetectorReporter());
#endif
#ifdef MOZ_DMD
RegisterStrongReporter(new mozilla::dmd::DMDReporter());
#endif
#ifdef XP_WIN
RegisterStrongReporter(new WindowsAddressSpaceReporter());
#endif
#ifdef XP_UNIX
nsMemoryInfoDumper::Initialize();
#endif
return NS_OK;
}
nsMemoryReporterManager::nsMemoryReporterManager()
: mMutex("nsMemoryReporterManager::mMutex")
, mIsRegistrationBlocked(false)
, mStrongReporters(new StrongReportersTable())
, mWeakReporters(new WeakReportersTable())
, mSavedStrongReporters(nullptr)
, mSavedWeakReporters(nullptr)
, mNextGeneration(1)
, mPendingProcessesState(nullptr)
, mPendingReportersState(nullptr)
{
}
nsMemoryReporterManager::~nsMemoryReporterManager()
{
delete mStrongReporters;
delete mWeakReporters;
NS_ASSERTION(!mSavedStrongReporters, "failed to restore strong reporters");
NS_ASSERTION(!mSavedWeakReporters, "failed to restore weak reporters");
}
#ifdef MOZ_WIDGET_GONK
#define DEBUG_CHILD_PROCESS_MEMORY_REPORTING 1
#endif
#ifdef DEBUG_CHILD_PROCESS_MEMORY_REPORTING
#define MEMORY_REPORTING_LOG(format, ...) \
printf_stderr("++++ MEMORY REPORTING: " format, ##__VA_ARGS__);
#else
#define MEMORY_REPORTING_LOG(...)
#endif
NS_IMETHODIMP
nsMemoryReporterManager::GetReports(
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandleReportData,
nsIFinishReportingCallback* aFinishReporting,
nsISupports* aFinishReportingData,
bool aAnonymize)
{
return GetReportsExtended(aHandleReport, aHandleReportData,
aFinishReporting, aFinishReportingData,
aAnonymize,
/* minimize = */ false,
/* DMDident = */ EmptyString());
}
NS_IMETHODIMP
nsMemoryReporterManager::GetReportsExtended(
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandleReportData,
nsIFinishReportingCallback* aFinishReporting,
nsISupports* aFinishReportingData,
bool aAnonymize,
bool aMinimize,
const nsAString& aDMDDumpIdent)
{
nsresult rv;
// Memory reporters are not necessarily threadsafe, so this function must
// be called from the main thread.
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
uint32_t generation = mNextGeneration++;
if (mPendingProcessesState) {
// A request is in flight. Don't start another one. And don't report
// an error; just ignore it, and let the in-flight request finish.
MEMORY_REPORTING_LOG("GetReports (gen=%u, s->gen=%u): abort\n",
generation, mPendingProcessesState->mGeneration);
return NS_OK;
}
MEMORY_REPORTING_LOG("GetReports (gen=%u)\n", generation);
uint32_t concurrency = Preferences::GetUint("memory.report_concurrency", 1);
MOZ_ASSERT(concurrency >= 1);
if (concurrency < 1) {
concurrency = 1;
}
mPendingProcessesState = new PendingProcessesState(generation,
aAnonymize,
aMinimize,
concurrency,
aHandleReport,
aHandleReportData,
aFinishReporting,
aFinishReportingData,
aDMDDumpIdent);
if (aMinimize) {
nsCOMPtr<nsIRunnable> callback =
NewRunnableMethod(this, &nsMemoryReporterManager::StartGettingReports);
rv = MinimizeMemoryUsage(callback);
} else {
rv = StartGettingReports();
}
return rv;
}
nsresult
nsMemoryReporterManager::StartGettingReports()
{
PendingProcessesState* s = mPendingProcessesState;
nsresult rv;
// Get reports for this process.
FILE* parentDMDFile = nullptr;
#ifdef MOZ_DMD
if (!s->mDMDDumpIdent.IsEmpty()) {
rv = nsMemoryInfoDumper::OpenDMDFile(s->mDMDDumpIdent, getpid(),
&parentDMDFile);
if (NS_WARN_IF(NS_FAILED(rv))) {
// Proceed with the memory report as if DMD were disabled.
parentDMDFile = nullptr;
}
}
#endif
// This is async.
GetReportsForThisProcessExtended(s->mHandleReport, s->mHandleReportData,
s->mAnonymize, parentDMDFile,
s->mFinishReporting, s->mFinishReportingData);
nsTArray<ContentParent*> childWeakRefs;
ContentParent::GetAll(childWeakRefs);
if (!childWeakRefs.IsEmpty()) {
// Request memory reports from child processes. This happens
// after the parent report so that the parent's main thread will
// be free to process the child reports, instead of causing them
// to be buffered and consume (possibly scarce) memory.
for (size_t i = 0; i < childWeakRefs.Length(); ++i) {
s->mChildrenPending.AppendElement(childWeakRefs[i]);
}
nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID);
// Don't use NS_ENSURE_* here; can't return until the report is finished.
if (NS_WARN_IF(!timer)) {
FinishReporting();
return NS_ERROR_FAILURE;
}
rv = timer->InitWithFuncCallback(TimeoutCallback,
this, kTimeoutLengthMS,
nsITimer::TYPE_ONE_SHOT);
if (NS_WARN_IF(NS_FAILED(rv))) {
FinishReporting();
return rv;
}
MOZ_ASSERT(!s->mTimer);
s->mTimer.swap(timer);
}
return NS_OK;
}
void
nsMemoryReporterManager::DispatchReporter(
nsIMemoryReporter* aReporter, bool aIsAsync,
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandleReportData,
bool aAnonymize)
{
MOZ_ASSERT(mPendingReportersState);
// Grab refs to everything used in the lambda function.
RefPtr<nsMemoryReporterManager> self = this;
nsCOMPtr<nsIMemoryReporter> reporter = aReporter;
nsCOMPtr<nsIHandleReportCallback> handleReport = aHandleReport;
nsCOMPtr<nsISupports> handleReportData = aHandleReportData;
nsCOMPtr<nsIRunnable> event = NS_NewRunnableFunction(
[self, reporter, aIsAsync, handleReport, handleReportData, aAnonymize] () {
reporter->CollectReports(handleReport, handleReportData, aAnonymize);
if (!aIsAsync) {
self->EndReport();
}
});
NS_DispatchToMainThread(event);
mPendingReportersState->mReportsPending++;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetReportsForThisProcessExtended(
nsIHandleReportCallback* aHandleReport, nsISupports* aHandleReportData,
bool aAnonymize, FILE* aDMDFile,
nsIFinishReportingCallback* aFinishReporting,
nsISupports* aFinishReportingData)
{
// Memory reporters are not necessarily threadsafe, so this function must
// be called from the main thread.
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
if (NS_WARN_IF(mPendingReportersState)) {
// Report is already in progress.
return NS_ERROR_IN_PROGRESS;
}
#ifdef MOZ_DMD
if (aDMDFile) {
// Clear DMD's reportedness state before running the memory
// reporters, to avoid spurious twice-reported warnings.
dmd::ClearReports();
}
#else
MOZ_ASSERT(!aDMDFile);
#endif
mPendingReportersState = new PendingReportersState(
aFinishReporting, aFinishReportingData, aDMDFile);
{
mozilla::MutexAutoLock autoLock(mMutex);
for (auto iter = mStrongReporters->Iter(); !iter.Done(); iter.Next()) {
DispatchReporter(iter.Key(), iter.Data(),
aHandleReport, aHandleReportData, aAnonymize);
}
for (auto iter = mWeakReporters->Iter(); !iter.Done(); iter.Next()) {
nsCOMPtr<nsIMemoryReporter> reporter = iter.Key();
DispatchReporter(reporter, iter.Data(),
aHandleReport, aHandleReportData, aAnonymize);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::EndReport()
{
if (--mPendingReportersState->mReportsPending == 0) {
#ifdef MOZ_DMD
if (mPendingReportersState->mDMDFile) {
nsMemoryInfoDumper::DumpDMDToFile(mPendingReportersState->mDMDFile);
}
#endif
if (mPendingProcessesState) {
// This is the parent process.
EndProcessReport(mPendingProcessesState->mGeneration, true);
} else {
mPendingReportersState->mFinishReporting->Callback(
mPendingReportersState->mFinishReportingData);
}
delete mPendingReportersState;
mPendingReportersState = nullptr;
}
return NS_OK;
}
nsMemoryReporterManager::PendingProcessesState*
nsMemoryReporterManager::GetStateForGeneration(uint32_t aGeneration)
{
// Memory reporting only happens on the main thread.
MOZ_RELEASE_ASSERT(NS_IsMainThread());
PendingProcessesState* s = mPendingProcessesState;
if (!s) {
// If we reach here, then:
//
// - A child process reported back too late, and no subsequent request
// is in flight.
//
// So there's nothing to be done. Just ignore it.
MEMORY_REPORTING_LOG(
"HandleChildReports: no request in flight (aGen=%u)\n",
aGeneration);
return nullptr;
}
if (aGeneration != s->mGeneration) {
// If we reach here, a child process must have reported back, too late,
// while a subsequent (higher-numbered) request is in flight. Again,
// ignore it.
MOZ_ASSERT(aGeneration < s->mGeneration);
MEMORY_REPORTING_LOG(
"HandleChildReports: gen mismatch (aGen=%u, s->gen=%u)\n",
aGeneration, s->mGeneration);
return nullptr;
}
return s;
}
// This function has no return value. If something goes wrong, there's no
// clear place to report the problem to, but that's ok -- we will end up
// hitting the timeout and executing TimeoutCallback().
void
nsMemoryReporterManager::HandleChildReport(
uint32_t aGeneration,
const dom::MemoryReport& aChildReport)
{
PendingProcessesState* s = GetStateForGeneration(aGeneration);
if (!s) {
return;
}
// Child reports should have a non-empty process.
MOZ_ASSERT(!aChildReport.process().IsEmpty());
// If the call fails, ignore and continue.
s->mHandleReport->Callback(aChildReport.process(),
aChildReport.path(),
aChildReport.kind(),
aChildReport.units(),
aChildReport.amount(),
aChildReport.desc(),
s->mHandleReportData);
}
/* static */ bool
nsMemoryReporterManager::StartChildReport(mozilla::dom::ContentParent* aChild,
const PendingProcessesState* aState)
{
if (!aChild->IsAlive()) {
MEMORY_REPORTING_LOG("StartChildReports (gen=%u): child exited before"
" its report was started\n",
aState->mGeneration);
return false;
}
mozilla::dom::MaybeFileDesc dmdFileDesc = void_t();
#ifdef MOZ_DMD
if (!aState->mDMDDumpIdent.IsEmpty()) {
FILE *dmdFile = nullptr;
nsresult rv = nsMemoryInfoDumper::OpenDMDFile(aState->mDMDDumpIdent,
aChild->Pid(), &dmdFile);
if (NS_WARN_IF(NS_FAILED(rv))) {
// Proceed with the memory report as if DMD were disabled.
dmdFile = nullptr;
}
if (dmdFile) {
dmdFileDesc = mozilla::ipc::FILEToFileDescriptor(dmdFile);
fclose(dmdFile);
}
}
#endif
return aChild->SendPMemoryReportRequestConstructor(
aState->mGeneration, aState->mAnonymize, aState->mMinimize, dmdFileDesc);
}
void
nsMemoryReporterManager::EndProcessReport(uint32_t aGeneration, bool aSuccess)
{
PendingProcessesState* s = GetStateForGeneration(aGeneration);
if (!s) {
return;
}
MOZ_ASSERT(s->mNumProcessesRunning > 0);
s->mNumProcessesRunning--;
s->mNumProcessesCompleted++;
MEMORY_REPORTING_LOG("HandleChildReports (aGen=%u): process %u %s"
" (%u running, %u pending)\n",
aGeneration, s->mNumProcessesCompleted,
aSuccess ? "completed" : "exited during report",
s->mNumProcessesRunning,
static_cast<unsigned>(s->mChildrenPending.Length()));
// Start pending children up to the concurrency limit.
while (s->mNumProcessesRunning < s->mConcurrencyLimit &&
!s->mChildrenPending.IsEmpty()) {
// Pop last element from s->mChildrenPending
RefPtr<ContentParent> nextChild;
nextChild.swap(s->mChildrenPending.LastElement());
s->mChildrenPending.TruncateLength(s->mChildrenPending.Length() - 1);
// Start report (if the child is still alive).
if (StartChildReport(nextChild, s)) {
++s->mNumProcessesRunning;
MEMORY_REPORTING_LOG("HandleChildReports (aGen=%u): started child report"
" (%u running, %u pending)\n",
aGeneration, s->mNumProcessesRunning,
static_cast<unsigned>(s->mChildrenPending.Length()));
}
}
// If all the child processes (if any) have reported, we can cancel
// the timer (if started) and finish up. Otherwise, just return.
if (s->mNumProcessesRunning == 0) {
MOZ_ASSERT(s->mChildrenPending.IsEmpty());
if (s->mTimer) {
s->mTimer->Cancel();
}
FinishReporting();
}
}
/* static */ void
nsMemoryReporterManager::TimeoutCallback(nsITimer* aTimer, void* aData)
{
nsMemoryReporterManager* mgr = static_cast<nsMemoryReporterManager*>(aData);
PendingProcessesState* s = mgr->mPendingProcessesState;
// Release assert because: if the pointer is null we're about to
// crash regardless of DEBUG, and this way the compiler doesn't
// complain about unused variables.
MOZ_RELEASE_ASSERT(s, "mgr->mPendingProcessesState");
MEMORY_REPORTING_LOG("TimeoutCallback (s->gen=%u; %u running, %u pending)\n",
s->mGeneration, s->mNumProcessesRunning,
static_cast<unsigned>(s->mChildrenPending.Length()));
// We don't bother sending any kind of cancellation message to the child
// processes that haven't reported back.
mgr->FinishReporting();
}
nsresult
nsMemoryReporterManager::FinishReporting()
{
// Memory reporting only happens on the main thread.
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
MOZ_ASSERT(mPendingProcessesState);
MEMORY_REPORTING_LOG("FinishReporting (s->gen=%u; %u processes reported)\n",
mPendingProcessesState->mGeneration,
mPendingProcessesState->mNumProcessesCompleted);
// Call this before deleting |mPendingProcessesState|. That way, if
// |mFinishReportData| calls GetReports(), it will silently abort, as
// required.
nsresult rv = mPendingProcessesState->mFinishReporting->Callback(
mPendingProcessesState->mFinishReportingData);
delete mPendingProcessesState;
mPendingProcessesState = nullptr;
return rv;
}
nsMemoryReporterManager::PendingProcessesState::PendingProcessesState(
uint32_t aGeneration, bool aAnonymize, bool aMinimize,
uint32_t aConcurrencyLimit,
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandleReportData,
nsIFinishReportingCallback* aFinishReporting,
nsISupports* aFinishReportingData,
const nsAString& aDMDDumpIdent)
: mGeneration(aGeneration)
, mAnonymize(aAnonymize)
, mMinimize(aMinimize)
, mChildrenPending()
, mNumProcessesRunning(1) // reporting starts with the parent
, mNumProcessesCompleted(0)
, mConcurrencyLimit(aConcurrencyLimit)
, mHandleReport(aHandleReport)
, mHandleReportData(aHandleReportData)
, mFinishReporting(aFinishReporting)
, mFinishReportingData(aFinishReportingData)
, mDMDDumpIdent(aDMDDumpIdent)
{
}
static void
CrashIfRefcountIsZero(nsISupports* aObj)
{
// This will probably crash if the object's refcount is 0.
uint32_t refcnt = NS_ADDREF(aObj);
if (refcnt <= 1) {
MOZ_CRASH("CrashIfRefcountIsZero: refcount is zero");
}
NS_RELEASE(aObj);
}
nsresult
nsMemoryReporterManager::RegisterReporterHelper(
nsIMemoryReporter* aReporter, bool aForce, bool aStrong, bool aIsAsync)
{
// This method is thread-safe.
mozilla::MutexAutoLock autoLock(mMutex);
if (mIsRegistrationBlocked && !aForce) {
return NS_ERROR_FAILURE;
}
if (mStrongReporters->Contains(aReporter) ||
mWeakReporters->Contains(aReporter)) {
return NS_ERROR_FAILURE;
}
// If |aStrong| is true, |aReporter| may have a refcnt of 0, so we take
// a kung fu death grip before calling PutEntry. Otherwise, if PutEntry
// addref'ed and released |aReporter| before finally addref'ing it for
// good, it would free aReporter! The kung fu death grip could itself be
// problematic if PutEntry didn't addref |aReporter| (because then when the
// death grip goes out of scope, we would delete the reporter). In debug
// mode, we check that this doesn't happen.
//
// If |aStrong| is false, we require that |aReporter| have a non-zero
// refcnt.
//
if (aStrong) {
nsCOMPtr<nsIMemoryReporter> kungFuDeathGrip = aReporter;
mStrongReporters->Put(aReporter, aIsAsync);
CrashIfRefcountIsZero(aReporter);
} else {
CrashIfRefcountIsZero(aReporter);
nsCOMPtr<nsIXPConnectWrappedJS> jsComponent = do_QueryInterface(aReporter);
if (jsComponent) {
// We cannot allow non-native reporters (WrappedJS), since we'll be
// holding onto a raw pointer, which would point to the wrapper,
// and that wrapper is likely to go away as soon as this register
// call finishes. This would then lead to subsequent crashes in
// CollectReports().
return NS_ERROR_XPC_BAD_CONVERT_JS;
}
mWeakReporters->Put(aReporter, aIsAsync);
}
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterStrongReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ true,
/* async = */ false);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterStrongAsyncReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ true,
/* async = */ true);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterWeakReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ false,
/* async = */ false);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterWeakAsyncReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ false,
/* async = */ true);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterStrongReporterEvenIfBlocked(
nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ true,
/* strong = */ true,
/* async = */ false);
}
NS_IMETHODIMP
nsMemoryReporterManager::UnregisterStrongReporter(nsIMemoryReporter* aReporter)
{
// This method is thread-safe.
mozilla::MutexAutoLock autoLock(mMutex);
MOZ_ASSERT(!mWeakReporters->Contains(aReporter));
if (mStrongReporters->Contains(aReporter)) {
mStrongReporters->Remove(aReporter);
return NS_OK;
}
// We don't register new reporters when the block is in place, but we do
// unregister existing reporters. This is so we don't keep holding strong
// references that these reporters aren't expecting (which can keep them
// alive longer than intended).
if (mSavedStrongReporters && mSavedStrongReporters->Contains(aReporter)) {
mSavedStrongReporters->Remove(aReporter);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsMemoryReporterManager::UnregisterWeakReporter(nsIMemoryReporter* aReporter)
{
// This method is thread-safe.
mozilla::MutexAutoLock autoLock(mMutex);
MOZ_ASSERT(!mStrongReporters->Contains(aReporter));
if (mWeakReporters->Contains(aReporter)) {
mWeakReporters->Remove(aReporter);
return NS_OK;
}
// We don't register new reporters when the block is in place, but we do
// unregister existing reporters. This is so we don't keep holding weak
// references that the old reporters aren't expecting (which can end up as
// dangling pointers that lead to use-after-frees).
if (mSavedWeakReporters && mSavedWeakReporters->Contains(aReporter)) {
mSavedWeakReporters->Remove(aReporter);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsMemoryReporterManager::BlockRegistrationAndHideExistingReporters()
{
// This method is thread-safe.
mozilla::MutexAutoLock autoLock(mMutex);
if (mIsRegistrationBlocked) {
return NS_ERROR_FAILURE;
}
mIsRegistrationBlocked = true;
// Hide the existing reporters, saving them for later restoration.
MOZ_ASSERT(!mSavedStrongReporters);
MOZ_ASSERT(!mSavedWeakReporters);
mSavedStrongReporters = mStrongReporters;
mSavedWeakReporters = mWeakReporters;
mStrongReporters = new StrongReportersTable();
mWeakReporters = new WeakReportersTable();
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::UnblockRegistrationAndRestoreOriginalReporters()
{
// This method is thread-safe.
mozilla::MutexAutoLock autoLock(mMutex);
if (!mIsRegistrationBlocked) {
return NS_ERROR_FAILURE;
}
// Banish the current reporters, and restore the hidden ones.
delete mStrongReporters;
delete mWeakReporters;
mStrongReporters = mSavedStrongReporters;
mWeakReporters = mSavedWeakReporters;
mSavedStrongReporters = nullptr;
mSavedWeakReporters = nullptr;
mIsRegistrationBlocked = false;
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetVsize(int64_t* aVsize)
{
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
return VsizeDistinguishedAmount(aVsize);
#else
*aVsize = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetVsizeMaxContiguous(int64_t* aAmount)
{
#ifdef HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER
return VsizeMaxContiguousDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetResident(int64_t* aAmount)
{
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
return ResidentDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetResidentFast(int64_t* aAmount)
{
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
return ResidentFastDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
/*static*/ int64_t
nsMemoryReporterManager::ResidentFast()
{
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
int64_t amount;
nsresult rv = ResidentFastDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, 0);
return amount;
#else
return 0;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetResidentPeak(int64_t* aAmount)
{
#ifdef HAVE_RESIDENT_PEAK_REPORTER
return ResidentPeakDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
/*static*/ int64_t
nsMemoryReporterManager::ResidentPeak()
{
#ifdef HAVE_RESIDENT_PEAK_REPORTER
int64_t amount = 0;
nsresult rv = ResidentPeakDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, 0);
return amount;
#else
return 0;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetResidentUnique(int64_t* aAmount)
{
#ifdef HAVE_RESIDENT_UNIQUE_REPORTER
return ResidentUniqueDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
/*static*/ int64_t
nsMemoryReporterManager::ResidentUnique()
{
#ifdef HAVE_RESIDENT_UNIQUE_REPORTER
int64_t amount = 0;
nsresult rv = ResidentUniqueDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, 0);
return amount;
#else
return 0;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetHeapAllocated(int64_t* aAmount)
{
#ifdef HAVE_JEMALLOC_STATS
jemalloc_stats_t stats;
jemalloc_stats(&stats);
*aAmount = stats.allocated;
return NS_OK;
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
// This has UNITS_PERCENTAGE, so it is multiplied by 100x.
NS_IMETHODIMP
nsMemoryReporterManager::GetHeapOverheadFraction(int64_t* aAmount)
{
#ifdef HAVE_JEMALLOC_STATS
jemalloc_stats_t stats;
jemalloc_stats(&stats);
*aAmount = HeapOverheadFraction(&stats);
return NS_OK;
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
static MOZ_MUST_USE nsresult
GetInfallibleAmount(InfallibleAmountFn aAmountFn, int64_t* aAmount)
{
if (aAmountFn) {
*aAmount = aAmountFn();
return NS_OK;
}
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetJSMainRuntimeGCHeap(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mJSMainRuntimeGCHeap, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetJSMainRuntimeTemporaryPeak(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mJSMainRuntimeTemporaryPeak, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetJSMainRuntimeCompartmentsSystem(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mJSMainRuntimeCompartmentsSystem,
aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetJSMainRuntimeCompartmentsUser(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mJSMainRuntimeCompartmentsUser,
aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetImagesContentUsedUncompressed(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mImagesContentUsedUncompressed,
aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetStorageSQLite(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mStorageSQLite, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetLowMemoryEventsVirtual(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mLowMemoryEventsVirtual, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetLowMemoryEventsPhysical(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mLowMemoryEventsPhysical, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetGhostWindows(int64_t* aAmount)
{
return GetInfallibleAmount(mAmountFns.mGhostWindows, aAmount);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetPageFaultsHard(int64_t* aAmount)
{
#ifdef HAVE_PAGE_FAULT_REPORTERS
return PageFaultsHardDistinguishedAmount(aAmount);
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
NS_IMETHODIMP
nsMemoryReporterManager::GetHasMozMallocUsableSize(bool* aHas)
{
void* p = malloc(16);
if (!p) {
return NS_ERROR_OUT_OF_MEMORY;
}
size_t usable = moz_malloc_usable_size(p);
free(p);
*aHas = !!(usable > 0);
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetIsDMDEnabled(bool* aIsEnabled)
{
#ifdef MOZ_DMD
*aIsEnabled = true;
#else
*aIsEnabled = false;
#endif
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetIsDMDRunning(bool* aIsRunning)
{
#ifdef MOZ_DMD
*aIsRunning = dmd::IsRunning();
#else
*aIsRunning = false;
#endif
return NS_OK;
}
namespace {
/**
* This runnable lets us implement
* nsIMemoryReporterManager::MinimizeMemoryUsage(). We fire a heap-minimize
* notification, spin the event loop, and repeat this process a few times.
*
* When this sequence finishes, we invoke the callback function passed to the
* runnable's constructor.
*/
class MinimizeMemoryUsageRunnable : public Runnable
{
public:
explicit MinimizeMemoryUsageRunnable(nsIRunnable* aCallback)
: mCallback(aCallback)
, mRemainingIters(sNumIters)
{
}
NS_IMETHOD Run() override
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (!os) {
return NS_ERROR_FAILURE;
}
if (mRemainingIters == 0) {
os->NotifyObservers(nullptr, "after-minimize-memory-usage",
u"MinimizeMemoryUsageRunnable");
if (mCallback) {
mCallback->Run();
}
return NS_OK;
}
os->NotifyObservers(nullptr, "memory-pressure", u"heap-minimize");
mRemainingIters--;
NS_DispatchToMainThread(this);
return NS_OK;
}
private:
// Send sNumIters heap-minimize notifications, spinning the event
// loop after each notification (see bug 610166 comment 12 for an
// explanation), because one notification doesn't cut it.
static const uint32_t sNumIters = 3;
nsCOMPtr<nsIRunnable> mCallback;
uint32_t mRemainingIters;
};
} // namespace
NS_IMETHODIMP
nsMemoryReporterManager::MinimizeMemoryUsage(nsIRunnable* aCallback)
{
RefPtr<MinimizeMemoryUsageRunnable> runnable =
new MinimizeMemoryUsageRunnable(aCallback);
return NS_DispatchToMainThread(runnable);
}
NS_IMETHODIMP
nsMemoryReporterManager::SizeOfTab(mozIDOMWindowProxy* aTopWindow,
int64_t* aJSObjectsSize,
int64_t* aJSStringsSize,
int64_t* aJSOtherSize,
int64_t* aDomSize,
int64_t* aStyleSize,
int64_t* aOtherSize,
int64_t* aTotalSize,
double* aJSMilliseconds,
double* aNonJSMilliseconds)
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aTopWindow);
auto* piWindow = nsPIDOMWindowOuter::From(aTopWindow);
if (NS_WARN_IF(!global) || NS_WARN_IF(!piWindow)) {
return NS_ERROR_FAILURE;
}
TimeStamp t1 = TimeStamp::Now();
// Measure JS memory consumption (and possibly some non-JS consumption, via
// |jsPrivateSize|).
size_t jsObjectsSize, jsStringsSize, jsPrivateSize, jsOtherSize;
nsresult rv = mSizeOfTabFns.mJS(global->GetGlobalJSObject(),
&jsObjectsSize, &jsStringsSize,
&jsPrivateSize, &jsOtherSize);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
TimeStamp t2 = TimeStamp::Now();
// Measure non-JS memory consumption.
size_t domSize, styleSize, otherSize;
rv = mSizeOfTabFns.mNonJS(piWindow, &domSize, &styleSize, &otherSize);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
TimeStamp t3 = TimeStamp::Now();
*aTotalSize = 0;
#define DO(aN, n) { *aN = (n); *aTotalSize += (n); }
DO(aJSObjectsSize, jsObjectsSize);
DO(aJSStringsSize, jsStringsSize);
DO(aJSOtherSize, jsOtherSize);
DO(aDomSize, jsPrivateSize + domSize);
DO(aStyleSize, styleSize);
DO(aOtherSize, otherSize);
#undef DO
*aJSMilliseconds = (t2 - t1).ToMilliseconds();
*aNonJSMilliseconds = (t3 - t2).ToMilliseconds();
return NS_OK;
}
namespace mozilla {
#define GET_MEMORY_REPORTER_MANAGER(mgr) \
RefPtr<nsMemoryReporterManager> mgr = \
nsMemoryReporterManager::GetOrCreate(); \
if (!mgr) { \
return NS_ERROR_FAILURE; \
}