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MINOR: trace: add the possibility to lock on some arguments

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Given that we can pass typed arguments to the trace() function, let's
add provisions for tracking them. They are source-specific so we need
to let the source fill their name and description. Only those with a
non-null name will be proposed.
This commit is contained in:
Willy Tarreau 2019-08-20 19:22:53 +02:00
parent beadb5c823
commit c14eea49e6
1 changed files with 14 additions and 0 deletions
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14
include/types/trace.h
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@ -96,6 +96,10 @@ enum trace_lockon {
TRACE_LOCKON_CONNECTION, // lock on the connection that started the trace
TRACE_LOCKON_SESSION, // lock on the session that started the trace
TRACE_LOCKON_STREAM, // lock on the stream that started the trace
TRACE_LOCKON_ARG1, // lock on arg1, totally source-dependent
TRACE_LOCKON_ARG2, // lock on arg2, totally source-dependent
TRACE_LOCKON_ARG3, // lock on arg3, totally source-dependent
TRACE_LOCKON_ARG4, // lock on arg4, totally source-dependent
};
/* Each trace event maps a name to a mask in an uint64_t. Multiple bits are
@ -110,6 +114,15 @@ struct trace_event {
const char *desc;
};
/* add a name and description for each arg that we know we can track. Those
* with a non-null name will be presented in the menu and will be usable for
* trace lock-on.
*/
struct trace_lockon_arg {
const char *name;
const char *desc;
};
struct trace_source {
/* source definition */
const struct ist name;
@ -117,6 +130,7 @@ struct trace_source {
const struct trace_event *known_events;
struct list source_link; // element in list of known trace sources
uint32_t arg_def; // argument definitions (sum of TRC_ARG{1..4}_*)
const struct trace_lockon_arg *lockon_args; // must be 4 entries if not NULL
/* trace configuration, adjusted by "trace <module>" on CLI */
enum trace_lockon lockon;
uint64_t start_events; // what will start the trace. default: 0=nothing