From 3f41b77843b338e836f52cc2d486be689d6cb9c1 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 9 Oct 2019 16:06:43 -0300 Subject: perf trace: Add a strtoul() method to 'struct syscall_arg_fmt' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This will go from a string to a number, so that filter expressions can be constructed with strings and then, before applying the tracepoint filters (or eBPF, in the future) we can map those strings to numbers. The first one will be for 'msr' tracepoint arguments, but real quickly we will be able to reuse all strarrays for that. Cc: Adrian Hunter Cc: Brendan Gregg Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-wgqq48agcgr95b8dmn6fygtr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'tools') diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 2c1968061b4b..faa5bf4a5a3a 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -86,8 +86,12 @@ # define F_LINUX_SPECIFIC_BASE 1024 #endif +/* + * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 + */ struct syscall_arg_fmt { size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); + bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); void *parm; const char *name; @@ -1543,8 +1547,10 @@ syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field } else { struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); - if (fmt) + if (fmt) { arg->scnprintf = fmt->scnprintf; + arg->strtoul = fmt->strtoul; + } } } -- cgit v1.2.3-59-g8ed1b