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Bug 893242 - Part 4: Add a memory reporter counting ContentParents and the number of IPC messages they have outstanding. r=njn

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This commit is contained in:
Justin Lebar 2013-07-17 14:31:10 -07:00
parent 545d682d16
commit ca73e2d2f6
1 changed files with 76 additions and 0 deletions
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76
dom/ipc/ContentParent.cpp
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@ -202,6 +202,79 @@ MemoryReportRequestParent::~MemoryReportRequestParent()
MOZ_COUNT_DTOR(MemoryReportRequestParent);
}
/**
* A memory reporter for ContentParent objects themselves.
*/
class ContentParentMemoryReporter MOZ_FINAL : public nsIMemoryMultiReporter
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIMEMORYMULTIREPORTER
NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(MallocSizeOf)
};
NS_IMPL_ISUPPORTS1(ContentParentMemoryReporter, nsIMemoryMultiReporter)
NS_IMETHODIMP
ContentParentMemoryReporter::GetName(nsACString& aName)
{
aName.AssignLiteral("ContentParents");
return NS_OK;
}
NS_IMETHODIMP
ContentParentMemoryReporter::CollectReports(nsIMemoryMultiReporterCallback* cb,
nsISupports* aClosure)
{
nsAutoTArray<ContentParent*, 16> cps;
ContentParent::GetAllEvenIfDead(cps);
for (uint32_t i = 0; i < cps.Length(); i++) {
ContentParent* cp = cps[i];
AsyncChannel* channel = cp->GetIPCChannel();
nsString friendlyName;
cp->FriendlyName(friendlyName);
cp->AddRef();
nsrefcnt refcnt = cp->Release();
const char* channelStr = "no channel";
uint32_t numQueuedMessages = 0;
if (channel) {
if (channel->Unsound_IsClosed()) {
channelStr = "closed channel";
} else {
channelStr = "open channel";
}
numQueuedMessages = channel->Unsound_NumQueuedMessages();
}
nsPrintfCString path("queued-ipc-messages/content-parent"
"(%s, pid=%d, %s, 0x%p, refcnt=%d)",
NS_ConvertUTF16toUTF8(friendlyName).get(),
cp->Pid(), channelStr, cp, refcnt);
NS_NAMED_LITERAL_CSTRING(desc,
"The number of unset IPC messages held in this ContentParent's "
"channel. A large value here might indicate that we're leaking "
"messages. Similarly, a ContentParent object for a process that's no "
"longer running could indicate that we're leaking ContentParents.");
nsresult rv = cb->Callback(/* process */ EmptyCString(),
path,
nsIMemoryReporter::KIND_OTHER,
nsIMemoryReporter::UNITS_COUNT,
numQueuedMessages,
desc,
aClosure);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsDataHashtable<nsStringHashKey, ContentParent*>* ContentParent::sAppContentParents;
nsTArray<ContentParent*>* ContentParent::sNonAppContentParents;
nsTArray<ContentParent*>* ContentParent::sPrivateContent;
@ -266,6 +339,9 @@ ContentParent::StartUp()
return;
}
nsRefPtr<ContentParentMemoryReporter> mr = new ContentParentMemoryReporter();
NS_RegisterMemoryMultiReporter(mr);
sCanLaunchSubprocesses = true;
// Try to preallocate a process that we can transform into an app later.