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* How to enable this feature?
* define USE_DEBUG_COUNTER as 1.
* you can disable to output the result with
RUBY_DEBUG_COUNTER_DISABLE environment variable
even if USE_DEBUG_COUNTER == 1.
* How to add new counter?
* add COUNTER(<name>) line on debug_counter.h.
* include "debug_counter.h"
* insert RB_DEBUG_COUNTER_INC(<name>) line on your favorite place.
* counter output example:
[RUBY_DEBUG_COUNTER] mc_inline_hit 999
[RUBY_DEBUG_COUNTER] mc_inline_miss 3
[RUBY_DEBUG_COUNTER] mc_global_hit 23
[RUBY_DEBUG_COUNTER] mc_global_miss 273
[RUBY_DEBUG_COUNTER] mc_global_state_miss 3
[RUBY_DEBUG_COUNTER] mc_class_serial_miss 0
[RUBY_DEBUG_COUNTER] mc_cme_complement 0
[RUBY_DEBUG_COUNTER] mc_cme_complement_hit 0
[RUBY_DEBUG_COUNTER] mc_search_super 1384
[RUBY_DEBUG_COUNTER] ivar_get_hit 0
[RUBY_DEBUG_COUNTER] ivar_get_miss 0
[RUBY_DEBUG_COUNTER] ivar_set_hit 0
[RUBY_DEBUG_COUNTER] ivar_set_miss 0
[RUBY_DEBUG_COUNTER] ivar_get 431
[RUBY_DEBUG_COUNTER] ivar_set 465
* mc_... is related to method caching.
* ivar_... is related to instance variable accesses.
* compare with dtrace/system tap features, there are completely
no performacne penalties when it is disabled.
* This feature is supported only on __GNUC__ compilers.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
39 lines
906 B
C
39 lines
906 B
C
/**********************************************************************
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debug_counter.c -
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created at: Tue Feb 21 16:51:18 2017
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Copyright (C) 2017 Koichi Sasada
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**********************************************************************/
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#include "debug_counter.h"
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#include <stdio.h>
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#if USE_DEBUG_COUNTER
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/* do not modify manually. use a script above */
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const char * const debug_counter_names[] = {
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#include "debug_counter_names.inc"
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""
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};
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size_t rb_debug_counter[RB_DEBUG_COUNTER_MAX + 1];
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__attribute__((destructor))
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static void
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rb_debug_counter_show_results(void)
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{
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const char *env = getenv("RUBY_DEBUG_COUNTER_DISABLE");
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if (env == NULL || strcmp("1", env) != 0) {
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int i;
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for (i=0; i<RB_DEBUG_COUNTER_MAX; i++) {
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fprintf(stderr, "[RUBY_DEBUG_COUNTER]\t%s\t%"PRIuSIZE"\n",
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debug_counter_names[i],
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rb_debug_counter[i]);
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}
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}
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}
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#endif /* USE_DEBUG_COUNTER */
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