Re: [PATCH 01/17] libtracefs: Added new API tracefs_sql()
From: Namhyung Kim <namhyung@kernel.org>
Date: 2021-08-02 23:45:56
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Hi Steve, On Fri, Jul 30, 2021 at 3:18 PM Steven Rostedt [off-list ref] wrote:
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
This adds the API tracefs_sql() that takes a tep_handle handler, a name,
and a SQL string and parses it to produce a tracefs_synth synthetic event
handler.
Currently it only supports simple SQL of the type:
SELECT start.common_pid AS pid, end.common_timestamp.usecs AS usecs
FROM sched_waking AS start on sched_switch AS end
ON start.pid = end.next_pid
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---[SNIP]
quoted hunk ↗ jump to hunk
diff --git a/src/sqlhist.l b/src/sqlhist.l new file mode 100644 index 000000000000..3f394f37b738 --- /dev/null +++ b/src/sqlhist.l@@ -0,0 +1,88 @@ +%{ +/* code here */ + +#include <stdarg.h> +#include "sqlhist-parse.h" + +extern int my_yyinput(char *buf, int max); + +#undef YY_INPUT +#define YY_INPUT(b, r, m) ({r = my_yyinput(b, m);}) + +#define YY_NO_INPUT +#define YY_NO_UNPUT + +#define YY_EXTRA_TYPE struct sqlhist_bison * + +#define HANDLE_COLUMN do { sb->line_idx += strlen(yytext); } while (0) + +%} + +%option caseless + +field [a-z_][a-z0-9_\.]* +qstring \"[^\"]*\" +hexnum 0x[0-9a-z]+ +number [0-9a-z]+
Do you mean a-f ? Thanks, Namhyung