зеркало из https://github.com/mozilla/gecko-dev.git
145 строки
4.9 KiB
C
145 строки
4.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 2000 Netscape Communications Corporation. All
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* 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
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the MPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*/
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#ifndef nsTraceMalloc_h___
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#define nsTraceMalloc_h___
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#include "prtypes.h"
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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_TraceMalloc comment for magic number differences in log file structure.
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*/
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#define NS_TRACE_MALLOC_MAGIC "XPCOM\nTMLog02\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_TraceMalloc with a valid log 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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* See xpcom/base/bloatblame.c for an example log-file reader.
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*/
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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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* 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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PR_END_EXTERN_C
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#endif /* nsTraceMalloc_h___ */
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