Hi, Ingo On 2015/5/11 17:30, Ingo Molnar wrote:
* He Kuang <heku...@huawei.com> wrote:Indicate to check variable location range in error message when we got failed to find the variable. Before this patch: $ perf probe --add 'generic_perform_write+118 bytes' Failed to find the location of bytes at this address. Perhaps, it has been optimized out. Error: Failed to add events. After this patch: $ perf probe --add 'generic_perform_write+118 bytes' Failed to find the location of bytes at this address.What does this sentence mean? I thought 'address' means 'location of bytes'. So the address identifies the location and obviously we know that. So this message wants to say something else.
'generic_perform_write' is a function name, while 'bytes' is a local variable in this function. Maybe the variable I chose make you confused. This maybe clear: Failed to find the location of 'bytes' at this address.
Perhaps, it has been optimized out. Use -V with --range option to show variable location range.This suggestion is useful.Error: Failed to add events.Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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