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| author | Ananth N Mavinakayanahalli <ananth@in.ibm.com> | 2007-05-08 00:28:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:08 -0700 |
| commit | 0f95b7fc839bc3272b1bf2325d8748a649bd3534 (patch) | |
| tree | c5cbf5eabc5b58867d7a8949c412163e37182542 /arch/i386 | |
| parent | 8f0c45cdf87dc9141e87b0ad2fc6fff216a95f79 (diff) | |
| download | linux-0f95b7fc839bc3272b1bf2325d8748a649bd3534.tar.gz | |
Kprobes: print details of kretprobe on assertion failure
In certain cases like when the real return address can't be found or when the number of tracked calls to a kretprobed function is less than the number of returns, we may not be able to find the correct return address after processing a kretprobe. Currently we just do a BUG_ON, but no information is provided about the actual failing kretprobe. Print out details of the kretprobe before calling BUG(). Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/kprobes.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c index e00f75ecf1a8..3fbef288c376 100644 --- a/arch/i386/kernel/kprobes.c +++ b/arch/i386/kernel/kprobes.c @@ -449,8 +449,7 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs) break; } - BUG_ON(!orig_ret_address || (orig_ret_address == trampoline_address)); - + kretprobe_assert(ri, orig_ret_address, trampoline_address); spin_unlock_irqrestore(&kretprobe_lock, flags); hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) { |