On Wed, 22 Jan 2025 08:59:39 +0100 Nam Cao <[email protected]> wrote:
> Hi, > > I installed a kretprobe on the function "rt_mutex_slowunlock". Although the > function is called, the probe is never hit. > How did you install the kretprobe? > The reason is because there are 3 copies of rt_mutex_slowunlock() in > vmlinux (at least for x86 defconfig + CONFIG_PREEMPT_RT). But probe point > is only installed in 1 copy. > > Is this considered a bug? Or is kprobe not intended to be used for local > function? Should we modify kprobe to support such cases? It's not a bug, but just the way the compiler works. Have you tried "perf probe" to install the probes? That uses dwarf info to find all the functions. -- Steve
