On 8/28/15 12:06 AM, Wang Nan wrote:
From: He Kuang<heku...@huawei.com>
Support helper function __get_dynamic_array_len() in libtraceevent,
this function is used accompany with __print_array() or __print_hex(),
but currently it is not an available function in the function list of
process_function().
The total allocated length of the dynamic array is embedded in the top
half of __data_loc_##item field. This patch adds new arg type
PRINT_DYNAMIC_ARRAY_LEN to return the length to eval_num_arg(),
Signed-off-by: He Kuang<heku...@huawei.com>
Acked-by: Namhyung Kim<namhy...@kernel.org>
Tested-by: Alexei Starovoitov <a...@plumgrid.com>
this patch fixes the perf crash:
Warning: [bpf:bpf_output_data] function __get_dynamic_array_len not
defined
Warning: Error: expected type 5 but read 0
*** glibc detected *** perf_4.2.0: double free or corruption (fasttop):
0x00000000032caf20 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7ec96)[0x7f0d5d2d3c96]
it's not strictly necessary until patch 32 lands, but I think it's
a good fix regardless.
Steven, could you take it into your tree?
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