backtrace

The Call Trace contains entries like that: [<deadbeef>] FunctionName+0xAB/0xCD [module_name] [<f00fface>] ? AnotherFunctionName+0x12/0x40 [module_name] [<deaffeed>] ClearFunctionName+0x88/0x88 [module_name] What is the meaning of the '?' mark before AnotherFunctionName? Eugene '?' means that the information about this stack entry is probably not reliable. The stack output mechanism (see the implementation of dump_trace() function ) was unable to prove that the address it has found is a valid return address in the call stack. '?' itself is output by printk_stack_address() . The stack entry may

rails console by default boots with context.back_trace_limit=16 , which can be changed to whatever you want simply by typing context.back_trace_limit=n . The problem is you have to type it each time you boot rails c . Where do I change the context.back_trace_limit permanently? Some more reading on rails console configuration appreciated. Fer You have to create/edit your ~/.irbrc with the following: IRB.conf[:BACK_TRACE_LIMIT]= 20 To be taken into account: The options must be uppercased This option is changing not only the rails console, but the normal "irb" behavior (the rails console uses irb

We are running the uclibc linux on ARM 9. The problem is uclibc doesn't support backtrace. When a core dump happens, I cannot grab the call stack. Does anyone have a good solution for that? For example, an existing porting of backtrace for uclibc, or any good method to grab the call stack when a core dump happens (uclibc+ARM+Linux)? Update: It seems that a patch was created to support backtrace() on uclibc for x86 and ARM (XScale) and it makes use of the __libc_stack_end symbol. Original Answer: I worked on a project where the version of glibc we were using did not provide a functional

So I am trying to find out what kernel processes are calling some functions in a block driver. I thought including backtrace() in the C library would make it easy. But I am having trouble to load the backtrace. I copied this example function to show the backtrace: http://www.linuxjournal.com/files/linuxjournal.com/linuxjournal/articles/063/6391/6391l1.html All attempts to compile have error in one place or another that a file cannot be found or that the functions are not defined. Here is what comes closest. In the Makefile I put the compiler directives: -rdynamic -I/usr/include If I leave out

Is there an equivalent command in GDB to that of WinDbg's "!process 0 7"? I want to extract all the threads in a dump file along with their backtraces in GDB. "info threads" doesn't output the stack traces. So, is there a command that does? Sharad Generally, the backtrace is used to get the stack of the current thread, but if there is a necessity to get the stack trace of all the threads, use the following command. thread apply all bt Employed Russian Is there a command that does? thread apply all where 来源： https://stackoverflow.com/questions/18391808/how-do-i-get-the-backtrace-for-all-the

I have PHPUnit and xdebug installed, and in my php.ini files for CLI I've got: display_errors = On xdebug.default_enable = 1 I've verified that an xdebug backtrace is printed when I create an error using the interactive console, but when an error occurs while running phpunit, there is no backtrace? What is happening to the backtrace? Is phpunit hiding it from me? Is there some setting I'm missing? Thanks! What is happening to the backtrace? Is phpunit hiding it from me? Yes, PHPUnit disables xdebug, at least these traces (by calling xdebug_disable() Docs ). Is there some setting I'm missing?