DUMPER(1) CYGWIN DUMPER(1)NAME
- Dump core from WIN32PID to FILENAME.core
SYNOPSISdumper [OPTION] FILENAME WIN32PID
OPTIONS-d, --verbose be verbose while dumping -h, --help output help
information and exit -q, --quiet be quiet while dumping (default)
-v, --version output version information and exit
DESCRIPTION
The dumper utility can be used to create a core dump of running Win‐
dows process. This core dump can be later loaded to gdb and analyzed.
One common way to use dumper is to plug it into cygwin's Just-In-Time
debugging facility by adding
error_start=x:\path\to\dumper.exe
to the CYGWIN environment variable. Please note that
x:\path\to\dumper.exe is Windows-style and not cygwin path. If
error_start is set this way, then dumper will be started whenever some
program encounters a fatal error.
dumper can be also be started from the command line to create a core
dump of any running process. Unfortunately, because of a Windows API
limitation, when a core dump is created and dumper exits, the target
process is terminated too.
To save space in the core dump, dumper doesn't write those portions
of target process' memory space that are loaded from executable and dll
files and are unchangeable, such as program code and debug info.
Instead, dumper saves paths to files which contain that data. When a
core dump is loaded into gdb, it uses these paths to load appropriate
files. That means that if you create a core dump on one machine and try
to debug it on another, you'll need to place identical copies of the
executable and dlls in the same directories as on the machine where
the core dump was created.
COPYRIGHT
Cygwin is Copyright (C) 1995-2010 Red Hat, Inc.
Cygwin is Free software; for complete licensing information, refer to:
http://cygwin.com/licensing.html
SEE ALSO
The full documentation to the Cygwin API is maintained on the web at:
http://cygwin.com/cygwin-api/cygwin-api.html
The website is updated more frequently than the man pages and should be
considered the authoritative source of information.
April 2010 DUMPER(1)
