fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<sonal>
jistone, i am trying to print stack trace. So i probed a function and used ubacktrace() and assigned the traces(which are hex address of the current task) in a variable. Now i want to print the functions corresponding to those hex address(stack trace). So i printed them in a function using print_ustack(). It is supposed to print the address, name of function corresponding to that address, but it is printing only the hex address
<sonal>
when i printed the value of traces using the same function i.e. print_ustack() inside the probe function, it prints all the supposed output.
<sonal>
Overall, i dont understand the behaviour of print_ustack(). Can you please help.
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<sonal>
fche, can you help
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<p53ud0nym>
Does anyone have any experience using SystemTap on a vanilla kernel? I believe I ran into an issue about var-tracking-assignments and not being able to find probe points on a custom kernel. The response was to compile the kernel based on fedora's latest version.
<p53ud0nym>
In theory, what modifications to a vanilla kernel would i need to make in order to get systemtap working with it?
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<fche>
p53ud0nym, the systemtap README file summarizes
<fche>
but really only one deliberate hobbling exists in the upstream kernel that I know of - that -fno-var-tracking-assignments KCFLAGS bit