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c6785e435b
gecko/xpcom/base/nsMemoryReporterManager.cpp
Wes Kocher c6785e435b Backed out 7 changesets (bug 1194555) for xpcshell failures 
Backed out changeset e77be333f4fb (bug 1194555)
Backed out changeset 11951462a37c (bug 1194555)
Backed out changeset 99b27aa952c5 (bug 1194555)
Backed out changeset 70a8ed3b6a45 (bug 1194555)
Backed out changeset 748bfebe81e7 (bug 1194555)
Backed out changeset cbaac05a2934 (bug 1194555)
Backed out changeset fcbfd1379fcd (bug 1194555)
2015-10-06 14:40:51 -07:00

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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 "nsIDOMWindow.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/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 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 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 nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
return GetProcSelfStatmField(0, aN);
}
static nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
return GetProcSelfStatmField(1, aN);
}
static nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#define HAVE_RESIDENT_UNIQUE_REPORTER 1
static nsresult
ResidentUniqueDistinguishedAmount(int64_t* aN)
{
return GetProcSelfSmapsPrivate(aN);
}
class ResidentUniqueReporter final : public nsIMemoryReporter
{
~ResidentUniqueReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
nsresult rv = ResidentUniqueDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
NS_IMPL_ISUPPORTS(ResidentUniqueReporter, nsIMemoryReporter)
#define HAVE_SYSTEM_HEAP_REPORTER 1
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;
}
#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 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 nsresult
VsizeDistinguishedAmount(int64_t* aN)
{
KINFO_PROC proc;
nsresult rv = GetKinfoProcSelf(&proc);
if (NS_SUCCEEDED(rv)) {
*aN = KP_SIZE(proc);
}
return rv;
}
static nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
KINFO_PROC proc;
nsresult rv = GetKinfoProcSelf(&proc);
if (NS_SUCCEEDED(rv)) {
*aN = KP_RSS(proc);
}
return rv;
}
static nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#ifdef __FreeBSD__
#include <libutil.h>
#include <algorithm>
static 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 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 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 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 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 nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#elif defined(XP_MACOSX)
#include <mach/mach_init.h>
#include <mach/task.h>
static 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 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 nsresult
ResidentDistinguishedAmountHelper(int64_t* aN, bool aDoPurge)
{
#ifdef HAVE_JEMALLOC_STATS
#ifndef MOZ_JEMALLOC4
if (aDoPurge) {
Telemetry::AutoTimer<Telemetry::MEMORY_FREE_PURGED_PAGES_MS> timer;
jemalloc_purge_freed_pages();
}
#endif
#endif
task_basic_info ti;
if (!GetTaskBasicInfo(&ti)) {
return NS_ERROR_FAILURE;
}
*aN = ti.resident_size;
return NS_OK;
}
static nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ false);
}
static nsresult
ResidentDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ true);
}
#elif defined(XP_WIN)
#include <windows.h>
#include <psapi.h>
#include <algorithm>
#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1
static 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 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 nsresult
ResidentFastDistinguishedAmount(int64_t* aN)
{
return ResidentDistinguishedAmount(aN);
}
#define HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER 1
static 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 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.
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;
}
class WindowsAddressSpaceReporter final : public nsIMemoryReporter
{
~WindowsAddressSpaceReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
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;
// 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;
nsCString path("address-space");
switch (info.State) {
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 (info.Type) {
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) {
// Basic attributes. Exactly one of these should be set.
if (info.Protect & PAGE_EXECUTE) {
path.AppendLiteral("/execute");
}
if (info.Protect & PAGE_EXECUTE_READ) {
path.AppendLiteral("/execute-read");
}
if (info.Protect & PAGE_EXECUTE_READWRITE) {
path.AppendLiteral("/execute-readwrite");
}
if (info.Protect & PAGE_EXECUTE_WRITECOPY) {
path.AppendLiteral("/execute-writecopy");
}
if (info.Protect & PAGE_NOACCESS) {
path.AppendLiteral("/noaccess");
}
if (info.Protect & PAGE_READONLY) {
path.AppendLiteral("/readonly");
}
if (info.Protect & PAGE_READWRITE) {
path.AppendLiteral("/readwrite");
}
if (info.Protect & PAGE_WRITECOPY) {
path.AppendLiteral("/writecopy");
}
// Modifiers. At most one of these should be set.
if (info.Protect & PAGE_GUARD) {
path.AppendLiteral("+guard");
}
if (info.Protect & PAGE_NOCACHE) {
path.AppendLiteral("+nocache");
}
if (info.Protect & PAGE_WRITECOMBINE) {
path.AppendLiteral("+writecombine");
}
// Annotate likely stack segments, too.
if (isPrevSegStackGuard &&
info.State == MEM_COMMIT &&
doType && info.Type == MEM_PRIVATE &&
doProtect && info.Protect == PAGE_READWRITE) {
path.AppendLiteral(" (stack)");
}
}
isPrevSegStackGuard =
info.State == MEM_COMMIT &&
doType && info.Type == MEM_PRIVATE &&
doProtect && info.Protect == (PAGE_READWRITE|PAGE_GUARD);
nsresult rv;
rv = aHandleReport->Callback(
EmptyCString(), path, KIND_OTHER, UNITS_BYTES, size,
NS_LITERAL_CSTRING("From MEMORY_BASIC_INFORMATION."), aData);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
size_t lastAddress = currentAddress;
currentAddress += size;
// If we overflow, we've examined all of the address space.
if (currentAddress < lastAddress) {
break;
}
}
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_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
nsresult rv = VsizeMaxContiguousDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return MOZ_COLLECT_REPORT(
"vsize-max-contiguous", KIND_OTHER, UNITS_BYTES, amount,
"Size of the maximum contiguous block of available virtual "
"memory.");
}
};
NS_IMPL_ISUPPORTS(VsizeMaxContiguousReporter, nsIMemoryReporter)
#endif
#ifdef HAVE_PRIVATE_REPORTER
class PrivateReporter final : public nsIMemoryReporter
{
~PrivateReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
nsresult rv = PrivateDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
NS_IMPL_ISUPPORTS(PrivateReporter, nsIMemoryReporter)
#endif
#ifdef HAVE_VSIZE_AND_RESIDENT_REPORTERS
class VsizeReporter final : public nsIMemoryReporter
{
~VsizeReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
nsresult rv = VsizeDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
NS_IMPL_ISUPPORTS(VsizeReporter, nsIMemoryReporter)
class ResidentReporter final : public nsIMemoryReporter
{
~ResidentReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
nsresult rv = ResidentDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
NS_IMPL_ISUPPORTS(ResidentReporter, nsIMemoryReporter)
#endif // HAVE_VSIZE_AND_RESIDENT_REPORTERS
#ifdef HAVE_SYSTEM_HEAP_REPORTER
class SystemHeapReporter final : public nsIMemoryReporter
{
~SystemHeapReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount;
nsresult rv = SystemHeapSize(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
NS_IMPL_ISUPPORTS(SystemHeapReporter, nsIMemoryReporter)
#endif // HAVE_SYSTEM_HEAP_REPORTER
#ifdef XP_UNIX
#include <sys/resource.h>
#define HAVE_RESIDENT_PEAK_REPORTER 1
static 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_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
nsresult rv = ResidentPeakDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return MOZ_COLLECT_REPORT(
"resident-peak", KIND_OTHER, UNITS_BYTES, amount,
"The peak 'resident' value for the lifetime of the process.");
}
};
NS_IMPL_ISUPPORTS(ResidentPeakReporter, nsIMemoryReporter)
#define HAVE_PAGE_FAULT_REPORTERS 1
class PageFaultsSoftReporter final : public nsIMemoryReporter
{
~PageFaultsSoftReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
struct rusage usage;
int err = getrusage(RUSAGE_SELF, &usage);
if (err != 0) {
return NS_ERROR_FAILURE;
}
int64_t amount = usage.ru_minflt;
return 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.");
}
};
NS_IMPL_ISUPPORTS(PageFaultsSoftReporter, nsIMemoryReporter)
static 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_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
nsresult rv = PageFaultsHardDistinguishedAmount(&amount);
NS_ENSURE_SUCCESS(rv, rv);
return 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.");
}
};
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
// This has UNITS_PERCENTAGE, so it is multiplied by 100.
static int64_t
HeapOverheadRatio(jemalloc_stats_t* aStats)
{
return (int64_t)10000 *
(aStats->waste + aStats->bookkeeping + aStats->page_cache) /
((double)aStats->allocated);
}
class JemallocHeapReporter final : public nsIMemoryReporter
{
~JemallocHeapReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
jemalloc_stats_t stats;
jemalloc_stats(&stats);
nsresult rv;
rv = MOZ_COLLECT_REPORT(
"heap-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.)");
NS_ENSURE_SUCCESS(rv, rv);
// 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.
rv = MOZ_COLLECT_REPORT(
"explicit/heap-overhead/bin-unused", KIND_NONHEAP, UNITS_BYTES,
stats.bin_unused,
"Bytes reserved for bins of fixed-size allocations which do not correspond to "
"an active allocation.");
NS_ENSURE_SUCCESS(rv, rv);
rv = 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 'heap-bookkeeping' or "
"'heap-page-cache' or 'heap-bin-unused'). Although the allocator will waste "
"some space under any circumstances, a large value here may indicate that the "
"heap is highly fragmented, or that allocator is performing poorly for some "
"other reason.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"explicit/heap-overhead/bookkeeping", KIND_NONHEAP, UNITS_BYTES,
stats.bookkeeping,
"Committed bytes which the heap allocator uses for internal data structures.");
NS_ENSURE_SUCCESS(rv, rv);
rv = 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.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"heap-committed", KIND_OTHER, UNITS_BYTES,
stats.allocated + stats.waste + stats.bookkeeping + stats.page_cache,
"Memory mapped by the heap allocator that is committed, i.e. in physical "
"memory or paged to disk. This value corresponds to 'heap-allocated' + "
"'heap-waste' + 'heap-bookkeeping' + 'heap-page-cache', but because "
"these values are read at different times, the result probably won't match "
"exactly.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"heap-overhead-ratio", KIND_OTHER, UNITS_PERCENTAGE,
HeapOverheadRatio(&stats),
"Ratio of committed, unused bytes to allocated bytes; i.e., "
"'heap-overhead' / 'heap-allocated'. This measures the overhead of "
"the heap allocator relative to amount of memory allocated.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"heap-mapped", KIND_OTHER, UNITS_BYTES, stats.mapped,
"Amount of memory currently mapped.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"heap-chunksize", KIND_OTHER, UNITS_BYTES, stats.chunksize,
"Size of chunks.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"heap-chunks", KIND_OTHER, UNITS_COUNT, (stats.mapped / stats.chunksize),
"Number of chunks currently mapped.");
NS_ENSURE_SUCCESS(rv, rv);
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_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
size_t Main, Static;
NS_SizeOfAtomTablesIncludingThis(MallocSizeOf, &Main, &Static);
nsresult rv;
rv = MOZ_COLLECT_REPORT(
"explicit/atom-tables/main", KIND_HEAP, UNITS_BYTES, Main,
"Memory used by the main atoms table.");
NS_ENSURE_SUCCESS(rv, rv);
rv = MOZ_COLLECT_REPORT(
"explicit/atom-tables/static", KIND_HEAP, UNITS_BYTES, Static,
"Memory used by the static atoms table.");
NS_ENSURE_SUCCESS(rv, rv);
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_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
return MOZ_COLLECT_REPORT(
"explicit/deadlock-detector", KIND_HEAP, UNITS_BYTES,
BlockingResourceBase::SizeOfDeadlockDetector(MallocSizeOf),
"Memory used by the deadlock detector.");
}
};
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);
#define REPORT(_path, _amount, _desc) \
do { \
nsresult rv; \
rv = aHandleReport->Callback(EmptyCString(), NS_LITERAL_CSTRING(_path), \
KIND_HEAP, UNITS_BYTES, _amount, \
NS_LITERAL_CSTRING(_desc), aData); \
if (NS_WARN_IF(NS_FAILED(rv))) { \
return rv; \
} \
} while (0)
REPORT("explicit/dmd/stack-traces/used",
sizes.mStackTracesUsed,
"Memory used by stack traces which correspond to at least "
"one heap block DMD is tracking.");
REPORT("explicit/dmd/stack-traces/unused",
sizes.mStackTracesUnused,
"Memory used by stack traces which don't correspond to any heap "
"blocks DMD is currently tracking.");
REPORT("explicit/dmd/stack-traces/table",
sizes.mStackTraceTable,
"Memory used by DMD's stack trace table.");
REPORT("explicit/dmd/live-block-table",
sizes.mLiveBlockTable,
"Memory used by DMD's live block table.");
REPORT("explicit/dmd/dead-block-list",
sizes.mDeadBlockTable,
"Memory used by DMD's dead block list.");
#undef REPORT
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 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)
, mGetReportsState(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 (mGetReportsState) {
// 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, mGetReportsState->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;
}
mGetReportsState = new GetReportsState(generation,
aAnonymize,
aMinimize,
concurrency,
aHandleReport,
aHandleReportData,
aFinishReporting,
aFinishReportingData,
aDMDDumpIdent);
mGetReportsState->mChildrenPending = new nsTArray<nsRefPtr<mozilla::dom::ContentParent>>();
if (aMinimize) {
rv = MinimizeMemoryUsage(NS_NewRunnableMethod(
this, &nsMemoryReporterManager::StartGettingReports));
} else {
rv = StartGettingReports();
}
return rv;
}
nsresult
nsMemoryReporterManager::StartGettingReports()
{
GetReportsState* s = mGetReportsState;
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
GetReportsForThisProcessExtended(s->mHandleReport, s->mHandleReportData,
s->mAnonymize, parentDMDFile);
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);
}
// The parent's report is done; make note of that, and start
// launching child process reports (if any).
EndProcessReport(s->mGeneration, true);
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::GetReportsForThisProcess(
nsIHandleReportCallback* aHandleReport,
nsISupports* aHandleReportData, bool aAnonymize)
{
return GetReportsForThisProcessExtended(aHandleReport, aHandleReportData,
aAnonymize, nullptr);
}
NS_IMETHODIMP
nsMemoryReporterManager::GetReportsForThisProcessExtended(
nsIHandleReportCallback* aHandleReport, nsISupports* aHandleReportData,
bool aAnonymize, FILE* aDMDFile)
{
// Memory reporters are not necessarily threadsafe, so this function must
// be called from the main thread.
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
#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
nsCOMArray<nsIMemoryReporter> allReporters;
{
mozilla::MutexAutoLock autoLock(mMutex);
for (auto iter = mStrongReporters->Iter(); !iter.Done(); iter.Next()) {
nsRefPtrHashKey<nsIMemoryReporter>* entry = iter.Get();
allReporters.AppendElement(entry->GetKey());
}
for (auto iter = mWeakReporters->Iter(); !iter.Done(); iter.Next()) {
nsPtrHashKey<nsIMemoryReporter>* entry = iter.Get();
allReporters.AppendElement(entry->GetKey());
}
}
for (uint32_t i = 0; i < allReporters.Length(); i++) {
allReporters[i]->CollectReports(aHandleReport, aHandleReportData,
aAnonymize);
}
#ifdef MOZ_DMD
if (aDMDFile) {
return nsMemoryInfoDumper::DumpDMDToFile(aDMDFile);
}
#endif
return NS_OK;
}
nsMemoryReporterManager::GetReportsState*
nsMemoryReporterManager::GetStateForGeneration(uint32_t aGeneration)
{
// Memory reporting only happens on the main thread.
MOZ_RELEASE_ASSERT(NS_IsMainThread());
GetReportsState* s = mGetReportsState;
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)
{
GetReportsState* 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 GetReportsState* aState)
{
#ifdef MOZ_NUWA_PROCESS
if (aChild->IsNuwaProcess()) {
return false;
}
#endif
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)
{
GetReportsState* 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
nsRefPtr<ContentParent> nextChild;
nextChild.swap(s->mChildrenPending->LastElement());
s->mChildrenPending->TruncateLength(s->mChildrenPending->Length() - 1);
// Start report (if the child is still alive and not Nuwa).
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);
GetReportsState* s = mgr->mGetReportsState;
// 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->mGetReportsState");
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(mGetReportsState);
MEMORY_REPORTING_LOG("FinishReporting (s->gen=%u; %u processes reported)\n",
mGetReportsState->mGeneration,
mGetReportsState->mNumProcessesCompleted);
// Call this before deleting |mGetReportsState|. That way, if
// |mFinishReportData| calls GetReports(), it will silently abort, as
// required.
nsresult rv = mGetReportsState->mFinishReporting->Callback(
mGetReportsState->mFinishReportingData);
delete mGetReportsState;
mGetReportsState = nullptr;
return rv;
}
nsMemoryReporterManager::GetReportsState::~GetReportsState()
{
delete mChildrenPending;
}
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)
{
// 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->PutEntry(aReporter);
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->PutEntry(aReporter);
}
return NS_OK;
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterStrongReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ true);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterWeakReporter(nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ false,
/* strong = */ false);
}
NS_IMETHODIMP
nsMemoryReporterManager::RegisterStrongReporterEvenIfBlocked(
nsIMemoryReporter* aReporter)
{
return RegisterReporterHelper(aReporter, /* force = */ true,
/* strong = */ true);
}
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->RemoveEntry(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->RemoveEntry(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->RemoveEntry(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->RemoveEntry(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;
}
// This is just a wrapper for int64_t that implements nsISupports, so it can be
// passed to nsIMemoryReporter::CollectReports.
class Int64Wrapper final : public nsISupports
{
~Int64Wrapper() {}
public:
NS_DECL_ISUPPORTS
Int64Wrapper() : mValue(0)
{
}
int64_t mValue;
};
NS_IMPL_ISUPPORTS0(Int64Wrapper)
class ExplicitCallback final : public nsIHandleReportCallback
{
~ExplicitCallback() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Callback(const nsACString& aProcess, const nsACString& aPath,
int32_t aKind, int32_t aUnits, int64_t aAmount,
const nsACString& aDescription,
nsISupports* aWrappedExplicit) override
{
// Using the "heap-allocated" reporter here instead of
// nsMemoryReporterManager.heapAllocated goes against the usual
// pattern. But it's for a good reason: in tests, we can easily
// create artificial (i.e. deterministic) reporters -- which allows us
// to precisely test nsMemoryReporterManager.explicit -- but we can't
// do that for distinguished amounts.
if (aPath.EqualsLiteral("heap-allocated") ||
(aKind == nsIMemoryReporter::KIND_NONHEAP &&
PromiseFlatCString(aPath).Find("explicit") == 0)) {
Int64Wrapper* wrappedInt64 = static_cast<Int64Wrapper*>(aWrappedExplicit);
wrappedInt64->mValue += aAmount;
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ExplicitCallback, nsIHandleReportCallback)
NS_IMETHODIMP
nsMemoryReporterManager::GetExplicit(int64_t* aAmount)
{
if (NS_WARN_IF(!aAmount)) {
return NS_ERROR_INVALID_ARG;
}
*aAmount = 0;
#ifndef HAVE_JEMALLOC_STATS
return NS_ERROR_NOT_AVAILABLE;
#else
// For each reporter we call CollectReports and filter out the
// non-explicit, non-NONHEAP measurements (except for "heap-allocated").
// That's lots of wasted work, and we used to have a GetExplicitNonHeap()
// method which did this more efficiently, but it ended up being more
// trouble than it was worth.
nsRefPtr<ExplicitCallback> handleReport = new ExplicitCallback();
nsRefPtr<Int64Wrapper> wrappedExplicitSize = new Int64Wrapper();
// Anonymization doesn't matter here, because we're only summing all the
// reported values. Enable it anyway because it's slightly faster, since it
// doesn't have to get URLs, find notable strings, etc.
GetReportsForThisProcess(handleReport, wrappedExplicitSize,
/* anonymize = */ true);
*aAmount = wrappedExplicitSize->mValue;
return NS_OK;
#endif // HAVE_JEMALLOC_STATS
}
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::GetHeapOverheadRatio(int64_t* aAmount)
{
#ifdef HAVE_JEMALLOC_STATS
jemalloc_stats_t stats;
jemalloc_stats(&stats);
*aAmount = HeapOverheadRatio(&stats);
return NS_OK;
#else
*aAmount = 0;
return NS_ERROR_NOT_AVAILABLE;
#endif
}
static 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 nsRunnable
{
public:
explicit MinimizeMemoryUsageRunnable(nsIRunnable* aCallback)
: mCallback(aCallback)
, mRemainingIters(sNumIters)
{
}
NS_IMETHOD Run()
{
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (!os) {
return NS_ERROR_FAILURE;
}
if (mRemainingIters == 0) {
os->NotifyObservers(nullptr, "after-minimize-memory-usage",
MOZ_UTF16("MinimizeMemoryUsageRunnable"));
if (mCallback) {
mCallback->Run();
}
return NS_OK;
}
os->NotifyObservers(nullptr, "memory-pressure",
MOZ_UTF16("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)
{
nsRefPtr<MinimizeMemoryUsageRunnable> runnable =
new MinimizeMemoryUsageRunnable(aCallback);
return NS_DispatchToMainThread(runnable);
}
NS_IMETHODIMP
nsMemoryReporterManager::SizeOfTab(nsIDOMWindow* 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);
nsCOMPtr<nsPIDOMWindow> piWindow = do_QueryInterface(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;
mSizeOfTabFns.mNonJS(piWindow, &domSize, &styleSize, &otherSize);
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 {
nsresult
RegisterStrongMemoryReporter(nsIMemoryReporter* aReporter)
{
// Hold a strong reference to the argument to make sure it gets released if
// we return early below.
nsCOMPtr<nsIMemoryReporter> reporter = aReporter;
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (!mgr) {
return NS_ERROR_FAILURE;
}
return mgr->RegisterStrongReporter(reporter);
}
nsresult
RegisterWeakMemoryReporter(nsIMemoryReporter* aReporter)
{
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (!mgr) {
return NS_ERROR_FAILURE;
}
return mgr->RegisterWeakReporter(aReporter);
}
nsresult
UnregisterStrongMemoryReporter(nsIMemoryReporter* aReporter)
{
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (!mgr) {
return NS_ERROR_FAILURE;
}
return mgr->UnregisterStrongReporter(aReporter);
}
nsresult
UnregisterWeakMemoryReporter(nsIMemoryReporter* aReporter)
{
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
if (!mgr) {
return NS_ERROR_FAILURE;
}
return mgr->UnregisterWeakReporter(aReporter);
}
#define GET_MEMORY_REPORTER_MANAGER(mgr) \
nsRefPtr<nsMemoryReporterManager> mgr = \
nsMemoryReporterManager::GetOrCreate(); \
if (!mgr) { \
return NS_ERROR_FAILURE; \
}
// Macro for generating functions that register distinguished amount functions
// with the memory reporter manager.
#define DEFINE_REGISTER_DISTINGUISHED_AMOUNT(kind, name) \
nsresult \
Register##name##DistinguishedAmount(kind##AmountFn aAmountFn) \
{ \
GET_MEMORY_REPORTER_MANAGER(mgr) \
mgr->mAmountFns.m##name = aAmountFn; \
return NS_OK; \
}
#define DEFINE_UNREGISTER_DISTINGUISHED_AMOUNT(name) \
nsresult \
Unregister##name##DistinguishedAmount() \
{ \
GET_MEMORY_REPORTER_MANAGER(mgr) \
mgr->mAmountFns.m##name = nullptr; \
return NS_OK; \
}
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, JSMainRuntimeGCHeap)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, JSMainRuntimeTemporaryPeak)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, JSMainRuntimeCompartmentsSystem)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, JSMainRuntimeCompartmentsUser)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, ImagesContentUsedUncompressed)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, StorageSQLite)
DEFINE_UNREGISTER_DISTINGUISHED_AMOUNT(StorageSQLite)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, LowMemoryEventsVirtual)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, LowMemoryEventsPhysical)
DEFINE_REGISTER_DISTINGUISHED_AMOUNT(Infallible, GhostWindows)
#undef DEFINE_REGISTER_DISTINGUISHED_AMOUNT
#undef DEFINE_UNREGISTER_DISTINGUISHED_AMOUNT
#define DEFINE_REGISTER_SIZE_OF_TAB(name) \
nsresult \
Register##name##SizeOfTab(name##SizeOfTabFn aSizeOfTabFn) \
{ \
GET_MEMORY_REPORTER_MANAGER(mgr) \
mgr->mSizeOfTabFns.m##name = aSizeOfTabFn; \
return NS_OK; \
}
DEFINE_REGISTER_SIZE_OF_TAB(JS);
DEFINE_REGISTER_SIZE_OF_TAB(NonJS);
#undef DEFINE_REGISTER_SIZE_OF_TAB
#undef GET_MEMORY_REPORTER_MANAGER
} // namespace mozilla
#if defined(MOZ_DMD)
namespace mozilla {
namespace dmd {
class DoNothingCallback final : public nsIHandleReportCallback
{
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Callback(const nsACString& aProcess, const nsACString& aPath,
int32_t aKind, int32_t aUnits, int64_t aAmount,
const nsACString& aDescription,
nsISupports* aData) override
{
// Do nothing; the reporter has already reported to DMD.
return NS_OK;
}
private:
~DoNothingCallback() {}
};
NS_IMPL_ISUPPORTS(DoNothingCallback, nsIHandleReportCallback)
void
RunReportersForThisProcess()
{
nsCOMPtr<nsIMemoryReporterManager> mgr =
do_GetService("@mozilla.org/memory-reporter-manager;1");
nsRefPtr<DoNothingCallback> doNothing = new DoNothingCallback();
mgr->GetReportsForThisProcess(doNothing, nullptr, /* anonymize = */ false);
}
} // namespace dmd
} // namespace mozilla
#endif // defined(MOZ_DMD)
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