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tools lib traceevent: Add '~' operation within arg_num_eval()

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When evaluating values for print flags, if the value included a '~'
operator, the parsing would fail. This broke kmalloc's parsing of:

__print_flags(REC->gfp_flags, "|", {(unsigned
long)((((((( gfp_t)(0x400000u|0x2000000u)) | (( gfp_t)0x40u) |
(( gfp_t)0x80u) | (( gfp_t)0x20000u)) | (( gfp_t)0x02u)) |
(( gfp_t)0x08u)) | (( gfp_t)0x4000u) | (( gfp_t)0x10000u) |
(( gfp_t)0x1000u) | (( gfp_t)0x200u)) & ~(( gfp_t)0x2000000u))
                                        ^
                                        |
                                      here

Signed-off-by: Steven Rostedt <[email protected]>
Reported-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: David Ahern <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Steven Rostedt 2016-02-26 18:13:28 -05:00 • committed by Arnaldo Carvalho de Melo
commit 9eb42dee2b
1 changed files with 6 additions and 0 deletions
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6
tools/lib/traceevent/event-parse.c
View file

@ -2398,6 +2398,12 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
break;
*val = left + right;
break;
case '~':
ret = arg_num_eval(arg->op.right, &right);
if (!ret)
break;
*val = ~right;
break;
default:
do_warning("unknown op '%s'", arg->op.op);
ret = 0;