Messages in this thread Patch in this message | | | Date | Tue, 26 May 2009 12:04:28 +0800 | From | Li Zefan <> | Subject | [PATCH v2 1/2] tracing/events: make __string() more general |
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This changes __string(..., src) to __string(..., len), thus makes it more general, and then block TRACE_EVENT() can use it.
Also introduce __fetch_str(), which is used in TP_assign() and returns the address of the string, while __get_str() is used in TP_print().
[ Impact: TRACE_EVENT api change ]
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> --- include/trace/events/irq.h | 12 ++++++------ include/trace/events/lockdep.h | 8 ++++---- include/trace/ftrace.h | 21 +++++++++++++-------- 3 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/include/trace/events/irq.h b/include/trace/events/irq.h index 32a9f7e..ce2b939 100644 --- a/include/trace/events/irq.h +++ b/include/trace/events/irq.h @@ -25,8 +25,8 @@ TRACE_EVENT(irq_handler_entry, TP_ARGS(irq, action), TP_STRUCT__entry( - __field( int, irq ) - __string( name, action->name ) + __field( int, irq ) + __string( name, strlen(action->name) ) ), TP_fast_assign( @@ -86,8 +86,8 @@ TRACE_EVENT(softirq_entry, TP_ARGS(h, vec), TP_STRUCT__entry( - __field( int, vec ) - __string( name, softirq_to_name[h-vec] ) + __field( int, vec ) + __string( name, strlen(softirq_to_name[h-vec]) ) ), TP_fast_assign( @@ -116,8 +116,8 @@ TRACE_EVENT(softirq_exit, TP_ARGS(h, vec), TP_STRUCT__entry( - __field( int, vec ) - __string( name, softirq_to_name[h-vec] ) + __field( int, vec ) + __string( name, strlen(softirq_to_name[h-vec]) ) ), TP_fast_assign( diff --git a/include/trace/events/lockdep.h b/include/trace/events/lockdep.h index 0e956c9..e6218fd 100644 --- a/include/trace/events/lockdep.h +++ b/include/trace/events/lockdep.h @@ -19,7 +19,7 @@ TRACE_EVENT(lock_acquire, TP_STRUCT__entry( __field(unsigned int, flags) - __string(name, lock->name) + __string(name, strlen(lock->name)) ), TP_fast_assign( @@ -39,7 +39,7 @@ TRACE_EVENT(lock_release, TP_ARGS(lock, nested, ip), TP_STRUCT__entry( - __string(name, lock->name) + __string(name, strlen(lock->name)) ), TP_fast_assign( @@ -58,7 +58,7 @@ TRACE_EVENT(lock_contended, TP_ARGS(lock, ip), TP_STRUCT__entry( - __string(name, lock->name) + __string(name, strlen(lock->name)) ), TP_fast_assign( @@ -74,7 +74,7 @@ TRACE_EVENT(lock_acquired, TP_ARGS(lock, ip, waittime), TP_STRUCT__entry( - __string(name, lock->name) + __string(name, strlen(lock->name)) __field(unsigned long, wait_usec) __field(unsigned long, wait_nsec_rem) ), diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index b5ff2e8..430f7d2 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -25,7 +25,7 @@ #define __field(type, item) type item; #undef __string -#define __string(item, src) unsigned short __str_loc_##item; +#define __string(item, len) unsigned short __str_loc_##item; #undef TP_STRUCT__entry #define TP_STRUCT__entry(args...) args @@ -66,7 +66,7 @@ #define __field(type, item); #undef __string -#define __string(item, src) int item; +#define __string(item, len) int item; #undef TRACE_EVENT #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ @@ -186,7 +186,7 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ return 0; #undef __string -#define __string(item, src) \ +#define __string(item, len) \ ret = trace_seq_printf(s, "\tfield: __str_loc " #item ";\t" \ "offset:%u;tsize:%u;\n", \ (unsigned int)offsetof(typeof(field), \ @@ -239,7 +239,7 @@ ftrace_format_##call(struct trace_seq *s) \ return ret; #undef __string -#define __string(item, src) \ +#define __string(item, len) \ ret = trace_define_field(event_call, "__str_loc", #item, \ offsetof(typeof(field), __str_loc_##item), \ sizeof(field.__str_loc_##item), 0); @@ -411,10 +411,15 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *call) \ #define __array(type, item, len) #undef __string -#define __string(item, src) \ - __str_offsets.item = __str_size + \ - offsetof(typeof(*entry), __str_data); \ - __str_size += strlen(src) + 1; +#define __string(item, len) \ + __str_offsets.item = __str_size + \ + offsetof(typeof(*entry), __str_data); \ + __str_size += (len) + 1; + +#undef __fetch_str +#define __fetch_str(dst) \ + ({__entry->__str_loc_##dst = __str_offsets.dst; \ + __get_str(dst);}) #undef __assign_str #define __assign_str(dst, src) \ -- 1.5.4.rc3
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