03-31-2008
Thanks for the tip, I'll give it a shot. In addition I had found that using Xcode under 10.5 might provide me with a few tools to create an executable with extended tool support.
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heap(1) BSD General Commands Manual heap(1)
NAME
heap -- List all the malloc-allocated buffers in the process's heap
SYNOPSIS
heap [-s | -sortBySize] [-z | -zones] [-guessNonObjects] [-sumObjectFields] [-showSizes] [-addresses all | <classes-pattern>] [-noContent]
pid | partial-executable-name | memory-graph-file
DESCRIPTION
heap lists the objects currently allocated on the heap of the specified process, as well as summary data. Objects are categorized by class
name, type (Objective-C, C++, or CFType), and binary image. C++ objects are identified by the vtable referenced from the start of the
object, so with multiple inheritance this may not give the precise class of the object.
The binary image identified for a class is the image which implements the class, not necessarily the binary image which caused the objects to
be allocated at runtime, or which "owns" those objects.
heap requires one argument -- either the process ID or the full or partial executable name of the process to examine, or the pathname of a
memory graph file generated by leaks or the Xcode Memory Graph Debugger.
The following options are available:
-s | -sortBySize
Sort output by total size of class instances, rather than by count.
-z | -zones
Show the output separated out into the different malloc zones, instead of an aggregated summary of all zones.
-guessNonObjects
Look through the memory contents of each Objective-C object to find pointers to malloc'ed blocks (non-objects), such as the variable
array hanging from an NSArray. These referenced blocks of memory are identified as their offset from the start of the object (say
"__NSCFArray[12]"). The count, number of bytes, and average size of memory blocks referenced from each different object offset loca-
tion are listed in the output.
-sumObjectFields
Do the same analysis as with the -guessNonObjects option, but add the sizes of those referenced non-object fields into the entries
for the corresponding objects.
-showSizes
Show the distribution of each malloc size for each object, instead of summing and averaging the sizes in a single entry.
-addresses all | <classes-pattern>
Print the addresses of all malloc blocks found on the heap in ascending address order, or the addresses of those objects whose full
class name is matched by the regular expression <classes-pattern>. The string "all" indicates that the addresses of all blocks (both
objects and non-objects) should be printed. The <classes-pattern> regular expression is interpreted as an extended (modern) regular
expression as described by the re_format(7) manual page. Note that toll-free-bridged CoreFoundation and Foundation classes have the
"__NSCF" prefix rather than just "NS" or "CF". Examples of valid classes-patterns include:
__NSCFString
'NS.*'
'__NSCFString|__NSCFArray'
'.*(String|Array)'
-noContent
Do not show object content in -addresses mode.
SEE ALSO
malloc(3), leaks(1), malloc_history(1), stringdups(1), vmmap(1), DevToolsSecurity(1)
The Xcode developer tools also include Instruments, a graphical application that can give information similar to that provided by heap. The
Allocations instrument graphically displays dynamic, real-time information about the object and memory use in an application, including back-
traces of where the allocations occurred. The Leaks instrument performs memory leak analysis.
BSD
April 26, 2018 BSD