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Added branch monitoring using a single unified branch frequency counter.

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This commit is contained in:
Andreas Gal 2008-06-10 16:49:05 -07:00
parent a1bf0819b2
commit 17d0d41459
3 changed files with 11 additions and 3 deletions
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7
js/src/jsinterp.cpp
View File

@ -2840,6 +2840,12 @@ JS_INTERPRET(JSContext *cx)
#define LOAD_FUNCTION(PCOFF) \
JS_GET_SCRIPT_FUNCTION(script, GET_FULL_INDEX(PCOFF), fun)
#ifndef MONITOR_BRANCH
#define MONITOR_BRANCH \
if ((JS_TRACE_MONITOR(cx).freq++ & TRACE_TRIGGER_MASK) == 0) \
trace_start(cx, regs.pc);
#endif
/*
* Prepare to call a user-supplied branch handler, and abort the script
* if it returns false.
@ -2847,6 +2853,7 @@ JS_INTERPRET(JSContext *cx)
#define CHECK_BRANCH(len) \
JS_BEGIN_MACRO \
if (len <= 0) { \
MONITOR_BRANCH; \
if ((cx->operationCount -= JSOW_SCRIPT_JUMP) <= 0) { \
if (!js_ResetOperationCount(cx)) \
goto error; \

4
js/src/jsinterpinlines.h
View File

@ -457,8 +457,8 @@ PRIMITIVE(guard_both_jsvals_are_string)(jsval& a, jsval& b)
static inline void
PRIMITIVE(trace_start)(JSContext* cx, jsbytecode* pc)
{
jsval args[] = { native_pointer_to_jsval(pc) };
js_CallRecorder(cx, "start", 1, args);
//jsval args[] = { native_pointer_to_jsval(pc) };
//js_CallRecorder(cx, "start", 1, args);
}
/*

3
js/src/jstracer.h
View File

@ -53,10 +53,11 @@
* a certain number of iterations and we recorded a tree for that loop.
*/
struct JSTraceMonitor {
int freq;
JSObject* recorder;
};
#define TRACE_THRESHOLD 10
#define TRACE_TRIGGER_MASK 0x3f
jsval js_CallRecorder(JSContext* cx, const char* fn, uintN argc, jsval* argv);