error::inode-uprobes - limitations of inode-uprobes
The uprobes kernel facility introduced in Linux 3.5 aims to supplant the earlier
out-of-tree utrace patch to enable user-space probing. There have been some
functional limitations in inode-uprobes that preclude some systemtap
constructs. Over time, we hope these regressions will be corrected.
- function.return probes
- process.function().return probes require
"return-probes" or "uretprobes" functionality, which
was not implemented in the builtin inode-uprobes until kernel 3.10. If you
cannot upgrade your kernel, consider using process.statement()
probes placed on source line numbers at the function's return statements.
- function.statement.absolute probes
- In utrace-equipped kernels, systemtap made it possible to
address probes by literal addresses in the process virtual memory address
space. The new inode-uprobes does not have this capability.