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Diffstat (limited to 'js/src/devtools/vprof/vprof.h')
| -rw-r--r-- | js/src/devtools/vprof/vprof.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/js/src/devtools/vprof/vprof.h b/js/src/devtools/vprof/vprof.h new file mode 100644 index 0000000000..3d7b290d04 --- /dev/null +++ b/js/src/devtools/vprof/vprof.h @@ -0,0 +1,270 @@ +/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: t; tab-width: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// +// Here are a few examples of using the value-profiling utility: +// +// _vprof (e); +// at the end of program execution, you'll get a dump of the source location +// of this probe, its min, max, average, the total sum of all instances of e, +// and the total number of times this probe was called. +// +// _vprof (x > 0); +// shows how many times and what percentage of the cases x was > 0, +// that is the probablitiy that x > 0. +// +// _vprof (n % 2 == 0); +// shows how many times n was an even number +// as well as th probablitiy of n being an even number. +// +// _hprof (n, 4, 1000, 5000, 5001, 10000); +// gives you the histogram of n over the given 4 bucket boundaries: +// # cases < 1000 +// # cases >= 1000 and < 5000 +// # cases >= 5000 and < 5001 +// # cases >= 5001 and < 10000 +// # cases >= 10000 +// +// _nvprof ("event name", value); +// all instances with the same name are merged +// so, you can call _vprof with the same event name at difference places +// +// _vprof (e, myProbe); +// value profile e and call myProbe (void* vprofID) at the profiling point. +// inside the probe, the client has the predefined variables: +// _VAL, _COUNT, _SUM, _MIN, _MAX, and the general purpose registers +// _IVAR1, ..., IVAR4 general integer registrs +// _I64VAR1, ..., I64VAR4 general integer64 registrs +// _DVAR1, ..., _DVAR4 general double registers +// _GENPTR a generic pointer that can be used by the client +// the number of registers can be changed in vprof.h +// + +#ifndef devtools_vprof_vprof_h +#define devtools_vprof_vprof_h +// +// If the application for which you want to use vprof is threaded, THREADED must +// be defined as 1, otherwise define it as 0 +// +// If your application is not threaded, define THREAD_SAFE 0, +// otherwise, you have the option of setting THREAD_SAFE to 1 which results in +// exact counts or to 0 which results in a much more efficient but non-exact +// counts +// +#define THREADED 0 +#define THREAD_SAFE 0 + +#include "VMPI.h" + +// Note, this is not supported in configurations with more than one AvmCore +// running in the same process. + +// portable align macro +#if defined(_MSC_VER) +# define vprof_align8(t) __declspec(align(8)) t +#elif defined(__GNUC__) +# define vprof_align8(t) t __attribute__((aligned(8))) +#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) +# define vprof_align8(t) t __attribute__((aligned(8))) +#elif defined(VMCFG_SYMBIAN) +# define vprof_align8(t) t __attribute__((aligned(8))) +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +int initValueProfile(void** id, char* file, int line, ...); +int profileValue(void* id, int64_t value); +int initHistProfile(void** id, char* file, int line, int nbins, ...); +int histValue(void* id, int64_t value); +uint64_t readTimestampCounter(); + +#ifdef __cplusplus +} +#endif + +// #define DOPROF + +#ifndef DOPROF +# define _nvprof(e, v) +# ifndef VMCFG_SYMBIAN +# define _vprof(v, ...) +# define _hprof(v, n, ...) +# define _nhprof(e, v, n, ...) +# define _ntprof_begin(e) +# define _ntprof_end(e) +# define _jvprof_init(id, ...) +# define _jnvprof_init(id, e, ...) +# define _jhprof_init(id, n, ...) +# define _jnhprof_init(id, e, n, ...) +# define _jvprof(id, v) +# define _jhprof(id, v) +# endif // ! VMCFG_SYMBIAN +#else + +// Historical/compatibility note: +// The macros below were originally written using conditional expressions, not +// if/else. The original author said that this was done to allow _vprof and +// _nvprof to be used in an expression context, but the old code had already +// wrapped the macro bodies in { }, so it is not clear how this could have +// worked. At present, the profiling macros must appear in a statement context +// only. + +# define _vprof(v, ...) \ + do { \ + static void* id = 0; \ + if (id == 0) \ + initValueProfile(&id, __FILE__, __LINE__, ##__VA_ARGS__, NULL); \ + profileValue(id, (int64_t)(v)); \ + } while (0) + +# define _nvprof(e, v) \ + do { \ + static void* id = 0; \ + if (id == 0) initValueProfile(&id, (char*)(e), -1, NULL); \ + profileValue(id, (int64_t)(v)); \ + } while (0) + +# define _hprof(v, n, ...) \ + do { \ + static void* id = 0; \ + if (id == 0) \ + initHistProfile(&id, __FILE__, __LINE__, (int)(n), ##__VA_ARGS__); \ + histValue(id, (int64_t)(v)); \ + } while (0) + +# define _nhprof(e, v, n, ...) \ + do { \ + static void* id = 0; \ + if (id == 0) \ + initHistProfile(&id, (char*)(e), -1, (int)(n), ##__VA_ARGS__); \ + histValue(id, (int64_t)(v)); \ + } while (0) + +// Profile execution time between _ntprof_begin(e) and _ntprof_end(e). +// The tag 'e' must match at the beginning and end of the region to +// be timed. Regions may be nested or overlap arbitrarily, as it is +// the tag alone that defines the begin/end correspondence. + +# define _ntprof_begin(e) \ + do { \ + static void* id = 0; \ + if (id == 0) initValueProfile(&id, (char*)(e), -1, NULL); \ + ((entry_t)id)->i64var[0] = readTimestampCounter(); \ + } while (0) + +// Assume 2.6 Ghz CPU +# define TICKS_PER_USEC 2600 + +# define _ntprof_end(e) \ + do { \ + static void* id = 0; \ + uint64_t stop = readTimestampCounter(); \ + if (id == 0) initValueProfile(&id, (char*)(e), -1, NULL); \ + uint64_t start = ((entry_t)id)->i64var[0]; \ + uint64_t usecs = (stop - start) / TICKS_PER_USEC; \ + profileValue(id, usecs); \ + } while (0) + +// These macros separate the creation of a profile record from its later usage. +// They are intended for profiling JIT-generated code. Once created, the JIT +// can bind a pointer to the profile record into the generated code, which can +// then record profile events during execution. + +# define _jvprof_init(id, ...) \ + if (*(id) == 0) \ + initValueProfile((id), __FILE__, __LINE__, ##__VA_ARGS__, NULL) + +# define _jnvprof_init(id, e, ...) \ + if (*(id) == 0) initValueProfile((id), (char*)(e), -1, ##__VA_ARGS__, NULL) + +# define _jhprof_init(id, n, ...) \ + if (*(id) == 0) \ + initHistProfile((id), __FILE__, __LINE__, (int)(n), ##__VA_ARGS__) + +# define _jnhprof_init(id, e, n, ...) \ + if (*(id) == 0) \ + initHistProfile((id), (char*)(e), -1, (int)(n), ##__VA_ARGS__) + +// Calls to the _jvprof and _jhprof macros must be wrapped in a non-inline +// function in order to be invoked from JIT-compiled code. + +# define _jvprof(id, v) profileValue((id), (int64_t)(v)) + +# define _jhprof(id, v) histValue((id), (int64_t)(v)) + +#endif + +#define NUM_EVARS 4 + +enum { LOCK_IS_FREE = 0, LOCK_IS_TAKEN = 1 }; + +extern +#ifdef __cplusplus + "C" +#endif + long + _InterlockedCompareExchange(long volatile* Destination, long Exchange, + long Comperand); + +typedef struct hist hist; + +typedef struct hist { + int nbins; + int64_t* lb; + int64_t* count; +}* hist_t; + +typedef struct entry entry; + +typedef struct entry { + long lock; + char* file; + int line; + int64_t value; + int64_t count; + int64_t sum; + int64_t min; + int64_t max; + void (*func)(void*); + hist* h; + + entry* next; + + // exposed to the clients + void* genptr; + int ivar[NUM_EVARS]; + vprof_align8(int64_t) i64var[NUM_EVARS]; + vprof_align8(double) dvar[NUM_EVARS]; + // + + char pad[128]; // avoid false sharing +}* entry_t; + +#define _VAL ((entry_t)vprofID)->value +#define _COUNT ((entry_t)vprofID)->count +#define _SUM ((entry_t)vprofID)->sum +#define _MIN ((entry_t)vprofID)->min +#define _MAX ((entry_t)vprofID)->max + +#define _GENPTR ((entry_t)vprofID)->genptr + +#define _IVAR0 ((entry_t)vprofID)->ivar[0] +#define _IVAR1 ((entry_t)vprofID)->ivar[1] +#define _IVAR2 ((entry_t)vprofID)->ivar[2] +#define _IVAR3 ((entry_t)vprofID)->ivar[3] + +#define _I64VAR0 ((entry_t)vprofID)->i64var[0] +#define _I64VAR1 ((entry_t)vprofID)->i64var[1] +#define _I64VAR2 ((entry_t)vprofID)->i64var[2] +#define _I64VAR3 ((entry_t)vprofID)->i64var[3] + +#define _DVAR0 ((entry_t)vprofID)->dvar[0] +#define _DVAR1 ((entry_t)vprofID)->dvar[1] +#define _DVAR2 ((entry_t)vprofID)->dvar[2] +#define _DVAR3 ((entry_t)vprofID)->dvar[3] + +#endif /* devtools_vprof_vprof_h */ |