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-'\"
-'\" Copyright (c) 1992-1999 by Karl Lehenbauer and Mark Diekhans
-'\" Copyright (c) 2000 by Scriptics Corporation.
-'\" All rights reserved.
-'\"
-.TH memory n 8.1 Tcl "Tcl Built-In Commands"
-.so man.macros
-.BS
-.SH NAME
-memory \- Control Tcl memory debugging capabilities
-.SH SYNOPSIS
-\fBmemory \fIoption \fR?\fIarg arg ...\fR?
-.BE
-.SH DESCRIPTION
-.PP
-The \fBmemory\fR command gives the Tcl developer control of Tcl's memory
-debugging capabilities.  The memory command has several suboptions, which are
-described below.  It is only available when Tcl has been compiled with
-memory debugging enabled (when \fBTCL_MEM_DEBUG\fR is defined at
-compile time), and after \fBTcl_InitMemory\fR has been called.
-.TP
-\fBmemory active\fR \fIfile\fR
-.
-Write a list of all currently allocated memory to the specified \fIfile\fR.
-.TP
-\fBmemory break_on_malloc\fR \fIcount\fR
-.
-After the \fIcount\fR allocations have been performed, \fBckalloc\fR
-outputs a message to this effect and that it is now attempting to enter
-the C debugger.  Tcl will then issue a \fISIGINT\fR signal against itself.
-If you are running Tcl under a C debugger, it should then enter the debugger
-command mode.
-.TP
-\fBmemory info\fR
-.
-Returns a report containing the total allocations and frees since
-Tcl began, the current packets allocated (the current
-number of calls to \fBckalloc\fR not met by a corresponding call
-to \fBckfree\fR), the current bytes allocated, and the maximum number
-of packets and bytes allocated.
-.TP
-\fBmemory init \fR[\fBon\fR|\fBoff\fR]
-.
-Turn on or off the pre-initialization of all allocated memory
-with bogus bytes.  Useful for detecting the use of uninitialized
-values.
-.TP
-\fBmemory objs \fIfile\fR
-.
-Causes a list of all allocated Tcl_Obj values to be written to the specified
-\fIfile\fR immediately, together with where they were allocated.  Useful for
-checking for leaks of values.
-.TP
-\fBmemory onexit\fR \fIfile\fR
-.
-Causes a list of all allocated memory to be written to the specified \fIfile\fR
-during the finalization of Tcl's memory subsystem.  Useful for checking
-that memory is properly cleaned up during process exit.
-.TP
-\fBmemory tag\fR \fIstring\fR
-.
-Each packet of memory allocated by \fBckalloc\fR can have associated
-with it a string-valued tag.  In the lists of allocated memory generated
-by \fBmemory active\fR and \fBmemory onexit\fR, the tag for each packet
-is printed along with other information about the packet.  The
-\fBmemory tag\fR command sets the tag value for subsequent calls
-to \fBckalloc\fR to be \fIstring\fR.
-.TP
-\fBmemory trace \fR[\fBon\fR|\fBoff\fR]
-.
-Turns memory tracing on or off.  When memory tracing is on, every call
-to \fBckalloc\fR causes a line of trace information to be written to
-\fIstderr\fR, consisting of the word \fIckalloc\fR, followed by the
-address returned, the amount of memory allocated, and the C filename
-and line number of the code performing the allocation.  For example:
-.RS
-.PP
-.CS
-ckalloc 40e478 98 tclProc.c 1406
-.CE
-.PP
-Calls to \fBckfree\fR are traced in the same manner.
-.RE
-.TP
-\fBmemory trace_on_at_malloc\fR \fIcount\fR
-.
-Enable memory tracing after \fIcount\fR \fBckalloc\fRs have been performed.
-For example, if you enter \fBmemory trace_on_at_malloc 100\fR,
-after the 100th call to \fBckalloc\fR, memory trace information will begin
-being displayed for all allocations and frees.  Since there can be a lot
-of memory activity before a problem occurs, judicious use of this option
-can reduce the slowdown caused by tracing (and the amount of trace information
-produced), if you can identify a number of allocations that occur before
-the problem sets in.  The current number of memory allocations that have
-occurred since Tcl started is printed on a guard zone failure.
-.TP
-\fBmemory validate \fR[\fBon\fR|\fBoff\fR]
-.
-Turns memory validation on or off. When memory validation is enabled,
-on every call to \fBckalloc\fR or \fBckfree\fR, the guard zones are
-checked for every piece of memory currently in existence that was
-allocated by \fBckalloc\fR.  This has a large performance impact and
-should only be used when overwrite problems are strongly suspected.
-The advantage of enabling memory validation is that a guard zone
-overwrite can be detected on the first call to \fBckalloc\fR or
-\fBckfree\fR after the overwrite occurred, rather than when the
-specific memory with the overwritten guard zone(s) is freed, which may
-occur long after the overwrite occurred.
-.SH "SEE ALSO"
-ckalloc, ckfree, Tcl_ValidateAllMemory, Tcl_DumpActiveMemory, TCL_MEM_DEBUG
-.SH KEYWORDS
-memory, debug
-'\"Local Variables:
-'\"mode: nroff
-'\"End: