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/* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsISupports.idl"
interface nsIFile;
interface nsICycleCollectorLogSink;
[scriptable, function, uuid(2dea18fc-fbfa-4bf7-ad45-0efaf5495f5e)]
interface nsIFinishDumpingCallback : nsISupports
{
void callback(in nsISupports data);
};
/**
* Callback interface for |dumpGCAndCCLogsToFile|, below. Note that
* these method calls can occur before |dumpGCAndCCLogsToFile|
* returns.
*/
[scriptable, uuid(dc1b2b24-65bd-441b-b6bd-cb5825a7ed14)]
interface nsIDumpGCAndCCLogsCallback : nsISupports
{
/**
* Called whenever a process has successfully finished dumping its GC/CC logs.
* Incomplete dumps (e.g., if the child crashes or is killed due to memory
* exhaustion) are not reported.
*
* @param aGCLog The file that the GC log was written to.
*
* @param aCCLog The file that the CC log was written to.
*
* @param aIsParent indicates whether this log file pair is from the
* parent process.
*/
void onDump(in nsIFile aGCLog,
in nsIFile aCCLog,
in bool aIsParent);
/**
* Called when GC/CC logging has finished, after all calls to |onDump|.
*/
void onFinish();
};
[scriptable, builtinclass, uuid(48541b74-47ee-4a62-9557-7f4b809bda5c)]
interface nsIMemoryInfoDumper : nsISupports
{
/**
* This dumps gzipped memory reports for this process and its child
* processes. If a file of the given name exists, it will be overwritten.
*
* @param aFilename The output file.
*
* @param aFinishDumping The callback called on completion.
*
* @param aFinishDumpingData The environment for the callback.
*
* @param aAnonymize Should the reports be anonymized?
*
* @param aMinimizeMemoryUsage indicates whether we should run a series of
* GC/CC's in an attempt to reduce our memory usage before collecting our
* memory report.
*
* Sample output, annotated with comments for explanatory purposes.
*
* {
* // The version number of the format, which will be incremented each time
* // backwards-incompatible changes are made. A mandatory integer.
* "version": 1
*
* // Equal to nsIMemoryReporterManager::hasMozMallocUsableSize. A
* // mandatory boolean.
* "hasMozMallocUsableSize": true,
*
* // The memory reports. A mandatory array.
* "reports": [
* // The properties correspond to the arguments of
* // nsIHandleReportCallback::callback. Every one is mandatory.
* {"process":"Main Process (pid 12345)", "path":"explicit/foo/bar",
* "kind":1, "units":0, "amount":2000000, "description":"Foo bar."},
* {"process":"Main Process (pid 12345)", "path":"heap-allocated",
* "kind":1, "units":0, "amount":3000000, "description":"Heap allocated."},
* {"process":"Main Process (pid 12345)", "path":"vsize",
* "kind":1, "units":0, "amount":10000000, "description":"Vsize."}
* ]
* }
*/
void dumpMemoryReportsToNamedFile(in AString aFilename,
in nsIFinishDumpingCallback aFinishDumping,
in nsISupports aFinishDumpingData,
in boolean aAnonymize,
in boolean aMinimizeMemoryUsage);
/**
* Similar to dumpMemoryReportsToNamedFile, this method dumps gzipped memory
* reports for this process and its child processes to files in the tmp
* directory called memory-reports-<identifier>-<pid>.json.gz (or something
* similar, such as memory-reports-<identifier>-<pid>-1.json.gz; no existing
* file will be overwritten).
*
* If DMD is enabled, this method also dumps gzipped DMD output for this
* process and its child processes to files in the tmp directory called
* dmd-<identifier>-<pid>.txt.gz (or something similar; again, no existing
* file will be overwritten).
*
* @param aIdentifier this identifier will appear in the filename of our
* about:memory dump and those of our children.
*
* If the identifier is empty, the implementation may set it arbitrarily
* and use that new value for its own dump and the dumps of its child
* processes. For example, the implementation may set |aIdentifier| to the
* number of seconds since the epoch.
*
* @param aAnonymize Should the reports be anonymized?
*
* @param aMinimizeMemoryUsage indicates whether we should run a series of
* GC/CC's in an attempt to reduce our memory usage before collecting our
* memory report.
*/
void dumpMemoryInfoToTempDir(
in AString aIdentifier,
in boolean aAnonymize,
in boolean aMinimizeMemoryUsage);
/**
* Dump GC and CC logs to files in the OS's temp directory (or in
* $MOZ_CC_LOG_DIRECTORY, if that environment variable is specified).
*
* @param aIdentifier If aIdentifier is non-empty, this string will appear in
* the filenames of the logs we create (both for this process and, if
* aDumpChildProcesses is true, for our child processes).
*
* If aIdentifier is empty, the implementation may set it to an
* arbitrary value; for example, it may set aIdentifier to the number
* of seconds since the epoch.
*
* @param aDumpAllTraces indicates whether we should run an all-traces CC
* log. An all-traces log visits all objects currently eligible for cycle
* collection, while a non-all-traces log avoids visiting some objects
* which we know are reachable.
*
* All-traces logs are much bigger than the alternative, but they may be
* helpful when trying to understand why a particular object is alive. For
* example, a non-traces-log will skip references held by an active
* document; if your object is being held alive by such a document, you
* probably want to see those references.
*
* @param aDumpChildProcesses indicates whether we should call
* DumpGCAndCCLogsToFile in our child processes. If so, the child processes
* will dump their children, and so on.
*
*/
void dumpGCAndCCLogsToFile(in AString aIdentifier,
in bool aDumpAllTraces,
in bool aDumpChildProcesses,
in nsIDumpGCAndCCLogsCallback aCallback);
/**
* Like |dumpGCAndCCLogsToFile|, but sends the logs to the given log
* sink object instead of accessing the filesystem directly, and
* dumps the current process only.
*/
void dumpGCAndCCLogsToSink(in bool aDumpAllTraces,
in nsICycleCollectorLogSink aSink);
};