зеркало из https://github.com/mozilla/pjs.git
256 строки
8.6 KiB
C
256 строки
8.6 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsTraceMalloc.c/bloatblame.c code, released
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* April 19, 2000.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brendan Eich, 14-April-2000
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsTraceMalloc_h___
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#define nsTraceMalloc_h___
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#include <stdio.h> /* for FILE */
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#include "prtypes.h"
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#ifdef XP_WIN
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#define setlinebuf(stream) setvbuf((stream), (char *)NULL, _IOLBF, 0)
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#endif
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PR_BEGIN_EXTERN_C
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/**
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* Magic "number" at start of a trace-malloc log file. Inspired by the PNG
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* magic string, which inspired XPCOM's typelib (.xpt) file magic. See the
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* NS_TraceMallocStartup comment (below) for magic number differences in log
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* file structure.
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*/
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#define NS_TRACE_MALLOC_MAGIC "XPCOM\nTMLog08\r\n\032"
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#define NS_TRACE_MALLOC_MAGIC_SIZE 16
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/**
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* Trace-malloc stats, traced via the 'Z' event at the end of a log file.
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*/
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typedef struct nsTMStats {
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uint32 calltree_maxstack;
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uint32 calltree_maxdepth;
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uint32 calltree_parents;
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uint32 calltree_maxkids;
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uint32 calltree_kidhits;
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uint32 calltree_kidmisses;
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uint32 calltree_kidsteps;
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uint32 callsite_recurrences;
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uint32 backtrace_calls;
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uint32 backtrace_failures;
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uint32 btmalloc_failures;
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uint32 dladdr_failures;
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uint32 malloc_calls;
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uint32 malloc_failures;
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uint32 calloc_calls;
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uint32 calloc_failures;
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uint32 realloc_calls;
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uint32 realloc_failures;
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uint32 free_calls;
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uint32 null_free_calls;
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} nsTMStats;
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#define NS_TMSTATS_STATIC_INITIALIZER {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
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/**
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* Call NS_TraceMallocStartup with a valid file descriptor to enable logging
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* of compressed malloc traces, including callsite chains. Integers may be
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* unsigned serial numbers, sizes, or offsets, and require at most 32 bits.
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* They're encoded as follows:
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* 0-127 0xxxxxxx (binary, one byte)
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* 128-16383 10xxxxxx xxxxxxxx
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* 16384-0x1fffff 110xxxxx xxxxxxxx xxxxxxxx
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* 0x200000-0xfffffff 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
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* 0x10000000-0xffffffff 11110000 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
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* Strings are NUL-terminated ASCII.
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*
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* Event Operands (magic TMLog01)
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* 'L' library serial, shared object filename string
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* 'N' method serial, library serial, demangled name string
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* 'S' site serial, parent serial, method serial, calling pc offset
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* 'M' site serial, malloc size
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* 'C' site serial, calloc size
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* 'R' site serial, realloc oldsize, realloc size
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* 'F' site serial, free size
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*
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* Event Operands (magic TMLog02)
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* 'Z' serialized struct tmstats (20 unsigned integers),
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* maxkids parent callsite serial,
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* maxstack top callsite serial
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*
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* Event Operands (magic TMLog03)
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* 'T' seconds, microseconds, caption
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*
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* Event Operands (magic TMLog04)
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* 'R' site serial, realloc size, old site serial, realloc oldsize
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*
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* Event Operands (magic TMLog05)
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* 'M' site serial, address, malloc size
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* 'C' site serial, address, calloc size
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* 'R' site serial, address, realloc size, old site serial,
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* old address, old size
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* 'F' site serial, address, free size
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*
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* Event Operands (magic TMLog06)
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* 'M' site serial, interval time (end), address, malloc size
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* 'C' site serial, interval time (end), address, calloc size
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* 'R' site serial, interval time (end), address, realloc size,
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* old site serial, old address, old size
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* 'F' site serial, interval time (end), address, free size
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*
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* Event Operands (magic TMLog07)
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* 'M' site serial, interval time (start), duration, address, malloc size
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* 'C' site serial, interval time (start), duration, address, calloc size
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* 'R' site serial, interval time (start), duration, address, realloc size,
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* old site serial, old address, old size
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* 'F' site serial, interval time (start), duration, address, free size
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*
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* Event Operands (magic TMLog08)
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* 'G' filename serial, source filename string.
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* 'N' method serial, library serial, source filename serial,
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* source file linenumber, demangled name string
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*
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* See tools/trace-malloc/bloatblame.c for an example log-file reader.
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*/
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#define TM_EVENT_LIBRARY 'L'
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#define TM_EVENT_FILENAME 'G'
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#define TM_EVENT_METHOD 'N'
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#define TM_EVENT_CALLSITE 'S'
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#define TM_EVENT_MALLOC 'M'
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#define TM_EVENT_CALLOC 'C'
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#define TM_EVENT_REALLOC 'R'
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#define TM_EVENT_FREE 'F'
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#define TM_EVENT_STATS 'Z'
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#define TM_EVENT_TIMESTAMP 'T'
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PR_EXTERN(void) NS_TraceMallocStartup(int logfd);
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/**
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* Initialize malloc tracing, using the ``standard'' startup arguments.
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*/
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PR_EXTERN(int) NS_TraceMallocStartupArgs(int argc, char* argv[]);
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/**
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* Return PR_TRUE iff |NS_TraceMallocStartup[Args]| has been successfully called.
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*/
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PR_EXTERN(PRBool) NS_TraceMallocHasStarted(void);
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/**
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* Stop all malloc tracing, flushing any buffered events to the logfile.
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*/
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PR_EXTERN(void) NS_TraceMallocShutdown(void);
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/**
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* Disable malloc tracing.
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*/
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PR_EXTERN(void) NS_TraceMallocDisable(void);
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/**
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* Enable malloc tracing.
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*/
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PR_EXTERN(void) NS_TraceMallocEnable(void);
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/**
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* Change the log file descriptor, flushing any buffered output to the old
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* fd, and writing NS_TRACE_MALLOC_MAGIC to the new file if it is zero length.
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* Return the old fd, so the caller can swap open fds. Return -2 on failure,
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* which means malloc failure.
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*/
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PR_EXTERN(int) NS_TraceMallocChangeLogFD(int fd);
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/**
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* Close the file descriptor fd and forget any bookkeeping associated with it.
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* Do nothing if fd is -1.
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*/
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PR_EXTERN(void) NS_TraceMallocCloseLogFD(int fd);
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/**
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* Emit a timestamp event with the given caption to the current log file.
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*/
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PR_EXTERN(void) NS_TraceMallocLogTimestamp(const char *caption);
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/**
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* Walk the stack, dumping frames in standard form to ofp. If skip is 0,
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* exclude the frames for NS_TraceStack and anything it calls to do the walk.
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* If skip is less than 0, include -skip such frames. If skip is positive,
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* exclude that many frames leading to the call to NS_TraceStack.
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*/
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PR_EXTERN(void)
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NS_TraceStack(int skip, FILE *ofp);
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/**
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* Dump a human-readable listing of current allocations and their compressed
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* stack backtraces to the file named by pathname. Beware this file may have
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* very long lines.
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*
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* Return -1 on error with errno set by the system, 0 on success.
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*/
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PR_EXTERN(int)
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NS_TraceMallocDumpAllocations(const char *pathname);
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/**
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* Flush all logfile buffers.
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*/
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PR_EXTERN(void)
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NS_TraceMallocFlushLogfiles(void);
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/**
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* Track all realloc and free calls operating on a given allocation.
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*/
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PR_EXTERN(void)
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NS_TrackAllocation(void* ptr, FILE *ofp);
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/* opaque type for API */
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typedef struct nsTMStackTraceIDStruct *nsTMStackTraceID;
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/**
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* Get an identifier for the stack trace of the current thread (to this
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* function's callsite) that can be used to print that stack trace later.
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*/
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PR_EXTERN(nsTMStackTraceID)
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NS_TraceMallocGetStackTrace(void);
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/**
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* Print the stack trace identified.
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*/
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PR_EXTERN(void)
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NS_TraceMallocPrintStackTrace(FILE *ofp, nsTMStackTraceID id);
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PR_END_EXTERN_C
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#endif /* nsTraceMalloc_h___ */
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