If you are using dbx to debug the kernel on your PC, this user guide should help you.
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If the program that dynamically copied the kernel was linked to a common kernelLibraries, it is better to debug the main file in the same working environmentin which it was created. dbx has limited supportExample for debugging “non-conforming” m filesag, (for main filesCreated system-wide with a different Solaris® version or location.Operating system.
dbx cannot find out that you are pointing to this Java application.from a kernel file as possible with native code.
Debug The Main File In The Same Operating Environment
You can also debug the main file by doing most of the debug
You can replace - if the program name and dbx often try to extract the program name from the main file. dbx may not find the main executable if the full path is specified as not availablein the base file. If dbx cannot find the executable,Include the full path to the binary if you need to tell dbx thatLoad the kernel file.
If this particular kernel file is not in the current directory, you can use yourPath header (for example, / tmp / core ).
Use the where command (see the where command) to determine where the device was running when it was Was emptied.Basic.
When debugging a new kernel file, you can also evaluate ranges and expressions.to see the values they were left with after the program crashed, but you cannotevaluate expressions that generate function logs. Can't you take a single step or a single suggestion?Control points.
If Your Main File Is Truncated
If you are worried about downloading the main file, make sure you have a truncatedBase file. When the maximum size allowed for report engines is set too smallIf the kernel file is securely created, dbx will not be able to read it.as a result, the file core is reduced. In the C shell, someone can set the maximum allowedThe length of the main file using the limit command (see each limit (1) man page). In the Bourne and korn shell, you use the ulimit request (see the limit (1) man page). You canChange any of our base file size limits in your right shell file, boot resourcefile, run in addition, then restart the progthe ramma that generated, I would say, the main fileto create a complete key file.
If the main file is incomplete and the stack segment is currently missing, thenMore information on the stack trace is not available. When linker information readis missing, then mention this because loadobjects is not available. In this case, youget a nice error message on librtld_db.so not always initializing.If there is no LWP list, then there is no information about the tape, information,or the trace information of the lwp-bund is available, when you run you will see the command where ,You receive an error message indicating that the program was not “active”.
Debug A Non-compliant Kernel File
Sometimes the main file is created by everyone on the system (on the main host), and youwant to download the main file to another device (host dbx )debug it. However, during this operation, there are two problems with the libraries.so:
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Shared libraries used by the program with the main hostyour local library might be differentFrom the dbx host library. Be a real group at the endFor tracks that affect libraries, you want to create those original librariesusually available on dbx-host. Use
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System libraries dbx in / usr / lib for understanding implementation details, their runtime linkersand a thread library on our own system. You might also need to suggest thisBasic host system libraries so that dbx can understanda runtime linker of computer file structures and stream data structures.
Convenience libraries and system libraries may also change as a result of fixes.such as major updates to the Solaris Operating Environment, making this problem even more serious.occur on the same host if, for example, the actual patch was installed after the kernelThe file was compiled, but was previously running dbx in your kernel.File.
dbx may display another error or the following errorMessages when loading the next "incomprehensible" kernel file:
Fixed Issues With Shared Libraries and
To solve library problems and debug nice "incompatibilities"Base file
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Set the dbx core_lo_pathmap environment variable to on .
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Use one of our pathmap commands to indicate whereUsually there are dbx recovery libraries for the main file.
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Use the debug command for debugging andbase file of the program.
For example, if the root sectionthe main host you received was exported via NFS and can be accessed via / net / core-host / on the dbx master sewing machine, you need to do the followingCommands to lubricate the prog program and the main prog file.core program for debugging:
dbxenv nowrap>(dbx) core_lo_pathmap on (dbx) Path to the map / usr / net / core-host / usr (dbx) Pathmap / appstuff / net / core-host / appstuff (dbx) debug program prog.core
If you are not exporting the entire root section of the primary host, you will need a new one.Copy the libraries manually. You don't want to recreate symbolic links. (TOFor example, you nYou should not link libc from.so to help you with libc.so.1 ; Just make sure libc.so.1 is available.)
Things To Remember
Take a smart approach when debugging a non-compliant main file:
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Command line pathmap does not recognizepathmap to get '/', so you cannot use the specific command:
Pathmap / / net / core-host
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Single argument mode for some commands path map doesn't work with loadobject paths, really uses both from-path argumentsmode towards.
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Debugging one of our main files probably works best if the dbx hostor has the same, possibly newer version of the Solaris Operating Environmentas the primary host, although this may not always be necessary.
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You may need the following system libraries:
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To link lessons:
/usr/lib/ld.so.1
/usr/lib/librtld_db.so.1
/usr/lib/64/ld.so.1
/usr/lib/64/librtld_db.so.1
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For streaming library as per lib implementationthread of you:
/usr/lib/libthread_db.so.1
/usr/lib/64/libthread_db.so.1
/usr/lib/lwp/libthread_db.so.1
/usr/lib/lwp/64/libthread_db.so.1
Applies only software
/ usr / lib / lwp if you are running dbx from a Solaris 8 Operating Environment, and only do so ifAlternatively, you can use the libthread library.
you64-bit versions usually require xxx _db.so libraries if dbx supports 64-bit versions at best.Solaris OS version from this system, libraries loaded and still in useas part of dbx , not as part of the target program.
The
ld.so.1 libraries are the target of the base imagefor example libc.so file or other library, so you need 32-bit library ld.so.1 or 64-bit library ld. such a person. 1 shopcorresponds to the program that created the center of the file.
If you are looking for a principle
Speed up your computer's performance now with this simple download.Include the dbx situation variable core_lo_pathmap. Use the my pathmap command to tell dbx where to use the correct libraries for the main file. Use the debug command to load your program and kernel file.
While running, press Ctrl + to force a core dump. Now you will see the main file in someone else's directory you are in. Since we never have an executable with debug symbols to do this, we just open the main file in gdb instead of the executable with symbols + main file.
Make sure my binary is compiled with debug symbols.define ulimit and even kernel. core_pattern is correct.run the program.open the dump with gdb, load icons and run bt.Try to find out what exactly happened!
