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xhprof.c
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/*
* Copyright (c) 2009 Facebook
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_xhprof.h"
#include "zend_extensions.h"
#include "trace.h"
#ifndef ZEND_WIN32
# include <sys/time.h>
# include <sys/resource.h>
# include <unistd.h>
#else
# include "win32/time.h"
# include "win32/getrusage.h"
# include "win32/unistd.h"
#endif
#include <stdlib.h>
#if HAVE_PCRE
#include "ext/pcre/php_pcre.h"
#endif
#if __APPLE__
#include <mach/mach_init.h>
#include <mach/mach_time.h>
#endif
#ifdef ZEND_WIN32
LARGE_INTEGER performance_frequency;
#endif
ZEND_DECLARE_MODULE_GLOBALS(xhprof)
/**
* ****************************
* STATIC FUNCTION DECLARATIONS
* ****************************
*/
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_xhprof_enable, 0, 0, 0)
ZEND_ARG_INFO(0, flags)
ZEND_ARG_INFO(0, options)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_xhprof_disable, 0)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_xhprof_sample_enable, 0)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_xhprof_sample_disable, 0)
ZEND_END_ARG_INFO()
/* }}} */
/**
* *********************
* PHP EXTENSION GLOBALS
* *********************
*/
/* List of functions implemented/exposed by xhprof */
zend_function_entry xhprof_functions[] = {
PHP_FE(xhprof_enable, arginfo_xhprof_enable)
PHP_FE(xhprof_disable, arginfo_xhprof_disable)
PHP_FE(xhprof_sample_enable, arginfo_xhprof_sample_enable)
PHP_FE(xhprof_sample_disable, arginfo_xhprof_sample_disable)
{NULL, NULL, NULL}
};
/* Callback functions for the xhprof extension */
zend_module_entry xhprof_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"xhprof", /* Name of the extension */
xhprof_functions, /* List of functions exposed */
PHP_MINIT(xhprof), /* Module init callback */
PHP_MSHUTDOWN(xhprof), /* Module shutdown callback */
PHP_RINIT(xhprof), /* Request init callback */
PHP_RSHUTDOWN(xhprof), /* Request shutdown callback */
PHP_MINFO(xhprof), /* Module info callback */
#if ZEND_MODULE_API_NO >= 20010901
XHPROF_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};
PHP_INI_BEGIN()
/* output directory:
* Currently this is not used by the extension itself.
* But some implementations of iXHProfRuns interface might
* choose to save/restore XHProf profiler runs in the
* directory specified by this ini setting.
*/
PHP_INI_ENTRY("xhprof.output_dir", "", PHP_INI_ALL, NULL)
/*
* collect_additional_info
* Collect mysql_query, curl_exec internal info. The default is 0.
*/
STD_PHP_INI_ENTRY("xhprof.collect_additional_info", "0", PHP_INI_ALL, OnUpdateBool, collect_additional_info, zend_xhprof_globals, xhprof_globals)
/* sampling_interval:
* Sampling interval to be used by the sampling profiler, in microseconds.
*/
#define STRINGIFY_(X) #X
#define STRINGIFY(X) STRINGIFY_(X)
STD_PHP_INI_ENTRY("xhprof.sampling_interval", STRINGIFY(XHPROF_DEFAULT_SAMPLING_INTERVAL), PHP_INI_ALL, OnUpdateLong, sampling_interval, zend_xhprof_globals, xhprof_globals)
/* sampling_depth:
* Depth to trace call-chain by the sampling profiler
*/
STD_PHP_INI_ENTRY("xhprof.sampling_depth", STRINGIFY(INT_MAX), PHP_INI_ALL, OnUpdateLong, sampling_depth, zend_xhprof_globals, xhprof_globals)
PHP_INI_END()
/* Init module */
#ifdef COMPILE_DL_XHPROF
ZEND_GET_MODULE(xhprof)
#endif
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE();
#endif
/**
* **********************************
* PHP EXTENSION FUNCTION DEFINITIONS
* **********************************
*/
/**
* Start XHProf profiling in hierarchical mode.
*
* @param long $flags flags for hierarchical mode
* @return void
* @author kannan
*/
PHP_FUNCTION(xhprof_enable)
{
zend_long xhprof_flags = 0; /* XHProf flags */
zval *optional_array = NULL; /* optional array arg: for future use */
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|lz", &xhprof_flags, &optional_array) == FAILURE) {
return;
}
hp_get_ignored_functions_from_arg(optional_array);
hp_begin(XHPROF_MODE_HIERARCHICAL, xhprof_flags);
}
/**
* Stops XHProf from profiling in hierarchical mode anymore and returns the
* profile info.
*
* @param void
* @return array hash-array of XHProf's profile info
* @author kannan, hzhao
*/
PHP_FUNCTION(xhprof_disable)
{
if (XHPROF_G(enabled)) {
hp_stop();
RETURN_ZVAL(&XHPROF_G(stats_count), 1, 0);
}
/* else null is returned */
}
/**
* Start XHProf profiling in sampling mode.
*
* @return void
* @author cjiang
*/
PHP_FUNCTION(xhprof_sample_enable)
{
zend_long xhprof_flags = 0; /* XHProf flags */
hp_get_ignored_functions_from_arg(NULL);
hp_begin(XHPROF_MODE_SAMPLED, xhprof_flags);
}
/**
* Stops XHProf from profiling in sampling mode anymore and returns the profile
* info.
*
* @param void
* @return array hash-array of XHProf's profile info
* @author cjiang
*/
PHP_FUNCTION(xhprof_sample_disable)
{
if (XHPROF_G(enabled)) {
hp_stop();
RETURN_ZVAL(&XHPROF_G(stats_count), 1, 0);
}
/* else null is returned */
}
static void php_xhprof_init_globals(zend_xhprof_globals *xhprof_globals)
{
xhprof_globals->enabled = 0;
xhprof_globals->ever_enabled = 0;
xhprof_globals->xhprof_flags = 0;
xhprof_globals->entries = NULL;
xhprof_globals->root = NULL;
xhprof_globals->trace_callbacks = NULL;
xhprof_globals->ignored_functions = NULL;
xhprof_globals->sampling_interval = XHPROF_DEFAULT_SAMPLING_INTERVAL;
xhprof_globals->sampling_depth = INT_MAX;
ZVAL_UNDEF(&xhprof_globals->stats_count);
/* no free hp_entry_t structures to start with */
xhprof_globals->entry_free_list = NULL;
int i;
for (i = 0; i < XHPROF_FUNC_HASH_COUNTERS_SIZE; i++) {
xhprof_globals->func_hash_counters[i] = 0;
}
if (xhprof_globals->sampling_interval < XHPROF_MINIMAL_SAMPLING_INTERVAL) {
xhprof_globals->sampling_interval = XHPROF_MINIMAL_SAMPLING_INTERVAL;
}
}
/**
* Module init callback.
*
* @author cjiang
*/
PHP_MINIT_FUNCTION(xhprof)
{
ZEND_INIT_MODULE_GLOBALS(xhprof, php_xhprof_init_globals, NULL);
REGISTER_INI_ENTRIES();
hp_register_constants(INIT_FUNC_ARGS_PASSTHRU);
/* Replace zend_compile with our proxy */
_zend_compile_file = zend_compile_file;
zend_compile_file = hp_compile_file;
/* Replace zend_compile_string with our proxy */
_zend_compile_string = zend_compile_string;
zend_compile_string = hp_compile_string;
#if PHP_VERSION_ID >= 80000
zend_observer_fcall_register(tracer_observer);
#else
/* Replace zend_execute with our proxy */
_zend_execute_ex = zend_execute_ex;
zend_execute_ex = hp_execute_ex;
#endif
/* Replace zend_execute_internal with our proxy */
_zend_execute_internal = zend_execute_internal;
zend_execute_internal = hp_execute_internal;
#if defined(DEBUG)
/* To make it random number generator repeatable to ease testing. */
srand(0);
#endif
#ifdef ZEND_WIN32
QueryPerformanceFrequency(&performance_frequency);
#endif
return SUCCESS;
}
/**
* Module shutdown callback.
*/
PHP_MSHUTDOWN_FUNCTION(xhprof)
{
/* free any remaining items in the free list */
hp_free_the_free_list();
#if PHP_VERSION_ID < 80000
/* Remove proxies, restore the originals */
zend_execute_ex = _zend_execute_ex;
#endif
zend_execute_internal = _zend_execute_internal;
zend_compile_file = _zend_compile_file;
zend_compile_string = _zend_compile_string;
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/**
* Request init callback. Nothing to do yet!
*/
PHP_RINIT_FUNCTION(xhprof)
{
#if defined(ZTS) && defined(COMPILE_DL_XHPROF)
ZEND_TSRMLS_CACHE_UPDATE();
#endif
XHPROF_G(timebase_conversion) = get_timebase_conversion();
return SUCCESS;
}
/**
* Request shutdown callback. Stop profiling and return.
*/
PHP_RSHUTDOWN_FUNCTION(xhprof)
{
hp_end();
return SUCCESS;
}
/**
* Module info callback. Returns the xhprof version.
*/
PHP_MINFO_FUNCTION(xhprof)
{
php_info_print_table_start();
php_info_print_table_header(2, "xhprof support", "enabled");
php_info_print_table_row(2, "Version", XHPROF_VERSION);
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/**
* ***************************************************
* COMMON HELPER FUNCTION DEFINITIONS AND LOCAL MACROS
* ***************************************************
*/
static void hp_register_constants(INIT_FUNC_ARGS)
{
REGISTER_LONG_CONSTANT("XHPROF_FLAGS_NO_BUILTINS",
XHPROF_FLAGS_NO_BUILTINS,
CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("XHPROF_FLAGS_CPU",
XHPROF_FLAGS_CPU,
CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("XHPROF_FLAGS_MEMORY",
XHPROF_FLAGS_MEMORY,
CONST_CS | CONST_PERSISTENT);
}
/**
* Parse the list of ignored functions from the zval argument.
*
* @author mpal
*/
void hp_get_ignored_functions_from_arg(zval *args)
{
if (args == NULL) {
return;
}
zval *pzval = zend_hash_str_find(Z_ARRVAL_P(args), "ignored_functions", sizeof("ignored_functions") - 1);
XHPROF_G(ignored_functions) = hp_ignored_functions_init(pzval);
}
void hp_ignored_functions_clear(hp_ignored_functions *functions)
{
if (functions == NULL) {
return;
}
hp_array_del(functions->names);
functions->names = NULL;
memset(functions->filter, 0, sizeof(functions->filter));
efree(functions);
}
double get_timebase_conversion()
{
#if defined(__APPLE__)
mach_timebase_info_data_t info;
(void) mach_timebase_info(&info);
return info.denom * 1000. / info.numer;
#endif
return 1.0;
}
hp_ignored_functions *hp_ignored_functions_init(zval *values)
{
hp_ignored_functions *functions;
zend_string **names;
uint32_t ix = 0;
int count;
/* Delete the array storing ignored function names */
hp_ignored_functions_clear(XHPROF_G(ignored_functions));
if (!values) {
return NULL;
}
if (Z_TYPE_P(values) == IS_ARRAY) {
HashTable *ht;
zend_string *key;
zval *val;
ht = Z_ARRVAL_P(values);
count = zend_hash_num_elements(ht);
names = ecalloc(count + 1, sizeof(zend_string *));
ZEND_HASH_FOREACH_STR_KEY_VAL(ht, key, val) {
if (!key) {
if (Z_TYPE_P(val) == IS_STRING && strcmp(Z_STRVAL_P(val), ROOT_SYMBOL) != 0) {
/* do not ignore "main" */
names[ix] = zend_string_init(Z_STRVAL_P(val), Z_STRLEN_P(val), 0);
ix++;
}
}
} ZEND_HASH_FOREACH_END();
} else if (Z_TYPE_P(values) == IS_STRING) {
names = ecalloc(2, sizeof(zend_string *));
names[0] = zend_string_init(Z_STRVAL_P(values), Z_STRLEN_P(values), 0);
ix = 1;
} else {
return NULL;
}
/* NULL terminate the array */
names[ix] = NULL;
functions = emalloc(sizeof(hp_ignored_functions));
functions->names = names;
memset(functions->filter, 0, sizeof(functions->filter));
uint32_t i = 0;
for (; names[i] != NULL; i++) {
zend_ulong hash = ZSTR_HASH(names[i]);
int idx = hash % XHPROF_MAX_IGNORED_FUNCTIONS;
functions->filter[idx] = hash;
}
return functions;
}
/**
* Initialize profiler state
*
* @author kannan, veeve
*/
void hp_init_profiler_state(int level)
{
/* Setup globals */
if (!XHPROF_G(ever_enabled)) {
XHPROF_G(ever_enabled) = 1;
XHPROF_G(entries) = NULL;
}
XHPROF_G(profiler_level) = (int)level;
/* Init stats_count */
if (Z_TYPE(XHPROF_G(stats_count)) != IS_UNDEF) {
zval_ptr_dtor(&XHPROF_G(stats_count));
}
array_init(&XHPROF_G(stats_count));
hp_init_trace_callbacks();
/* Call current mode's init cb */
XHPROF_G(mode_cb).init_cb();
}
/**
* Cleanup profiler state
*
* @author kannan, veeve
*/
void hp_clean_profiler_state()
{
/* Call current mode's exit cb */
XHPROF_G(mode_cb).exit_cb();
/* Clear globals */
if (Z_TYPE(XHPROF_G(stats_count)) != IS_UNDEF) {
zval_ptr_dtor(&XHPROF_G(stats_count));
}
ZVAL_UNDEF(&XHPROF_G(stats_count));
XHPROF_G(entries) = NULL;
XHPROF_G(profiler_level) = 1;
XHPROF_G(ever_enabled) = 0;
if (XHPROF_G(trace_callbacks)) {
zend_hash_destroy(XHPROF_G(trace_callbacks));
FREE_HASHTABLE(XHPROF_G(trace_callbacks));
XHPROF_G(trace_callbacks) = NULL;
}
if (XHPROF_G(root)) {
zend_string_release(XHPROF_G(root));
XHPROF_G(root) = NULL;
}
/* Delete the array storing ignored function names */
hp_ignored_functions_clear(XHPROF_G(ignored_functions));
XHPROF_G(ignored_functions) = NULL;
}
/**
* Returns formatted function name
*
* @param entry hp_entry
* @author veeve
*/
size_t hp_get_entry_name(hp_entry_t *entry, char *result_buf, size_t result_len)
{
size_t len;
/* Add '@recurse_level' if required */
/* NOTE: Dont use snprintf's return val as it is compiler dependent */
if (entry->rlvl_hprof) {
len = snprintf(result_buf, result_len, "%s@%d", ZSTR_VAL(entry->name_hprof), entry->rlvl_hprof);
} else {
len = snprintf(result_buf, result_len, "%s", ZSTR_VAL(entry->name_hprof));
}
return len;
}
/**
* Build a caller qualified name for a callee.
*
* For example, if A() is caller for B(), then it returns "A==>B".
* Recursive invokations are denoted with @<n> where n is the recursion
* depth.
*
* For example, "foo==>foo@1", and "foo@2==>foo@3" are examples of direct
* recursion. And "bar==>foo@1" is an example of an indirect recursive
* call to foo (implying the foo() is on the call stack some levels
* above).
*
* @author kannan, veeve
*/
size_t hp_get_function_stack(hp_entry_t *entry, int level, char *result_buf, size_t result_len)
{
size_t len = 0;
/* End recursion if we dont need deeper levels or we dont have any deeper
* levels */
if (!entry->prev_hprof || (level <= 1)) {
return hp_get_entry_name(entry, result_buf, result_len);
}
/* Take care of all ancestors first */
len = hp_get_function_stack(entry->prev_hprof, level - 1, result_buf, result_len);
/* Append the delimiter */
# define HP_STACK_DELIM "==>"
# define HP_STACK_DELIM_LEN (sizeof(HP_STACK_DELIM) - 1)
if (result_len < (len + HP_STACK_DELIM_LEN)) {
/* Insufficient result_buf. Bail out! */
return len;
}
/* Add delimiter only if entry had ancestors */
if (len) {
strncat(result_buf + len, HP_STACK_DELIM, result_len - len);
len += HP_STACK_DELIM_LEN;
}
# undef HP_STACK_DELIM_LEN
# undef HP_STACK_DELIM
/* Append the current function name */
return len + hp_get_entry_name(entry, result_buf + len, result_len - len);
}
/**
* Takes an input of the form /a/b/c/d/foo.php and returns
* a pointer to one-level directory and basefile name
* (d/foo.php) in the same string.
*/
static const char *hp_get_base_filename(const char *filename)
{
const char *ptr;
int found = 0;
if (!filename)
return "";
/* reverse search for "/" and return a ptr to the next char */
for (ptr = filename + strlen(filename) - 1; ptr >= filename; ptr--) {
if (*ptr == '/') {
found++;
}
if (found == 2) {
return ptr + 1;
}
}
/* no "/" char found, so return the whole string */
return filename;
}
/**
* Free any items in the free list.
*/
static void hp_free_the_free_list()
{
hp_entry_t *p = XHPROF_G(entry_free_list);
hp_entry_t *cur;
while (p) {
cur = p;
p = p->prev_hprof;
free(cur);
}
}
/**
* Increment the count of the given stat with the given count
* If the stat was not set before, inits the stat to the given count
*
* @param zval *counts Zend hash table pointer
* @param char *name Name of the stat
* @param long count Value of the stat to incr by
* @return void
* @author kannan
*/
void hp_inc_count(zval *counts, char *name, zend_long count)
{
HashTable *ht;
zval *data, val;
if (!counts) {
return;
}
ht = HASH_OF(counts);
if (!ht) {
return;
}
data = zend_hash_str_find(ht, name, strlen(name));
if (data) {
ZVAL_LONG(data, Z_LVAL_P(data) + count);
} else {
ZVAL_LONG(&val, count);
zend_hash_str_update(ht, name, strlen(name), &val);
}
}
/**
* Truncates the given timeval to the nearest slot begin, where
* the slot size is determined by intr
*
* @param tv Input timeval to be truncated in place
* @param intr Time interval in microsecs - slot width
* @return void
* @author veeve
*/
void hp_trunc_time(struct timeval *tv, zend_ulong intr)
{
zend_ulong time_in_micro;
/* Convert to microsecs and trunc that first */
time_in_micro = (tv->tv_sec * 1000000) + tv->tv_usec;
time_in_micro /= intr;
time_in_micro *= intr;
/* Update tv */
tv->tv_sec = (time_in_micro / 1000000);
tv->tv_usec = (time_in_micro % 1000000);
}
/**
* Sample the stack. Add it to the stats_count global.
*
* @param tv current time
* @param entries func stack as linked list of hp_entry_t
* @return void
* @author veeve
*/
void hp_sample_stack(hp_entry_t **entries)
{
char key[SCRATCH_BUF_LEN];
char symbol[SCRATCH_BUF_LEN * 1000];
/* Build key */
snprintf(key, sizeof(key), "%d.%06d", (uint32) XHPROF_G(last_sample_time).tv_sec, (uint32) XHPROF_G(last_sample_time).tv_usec);
/* Init stats in the global stats_count hashtable */
hp_get_function_stack(*entries, XHPROF_G(sampling_depth), symbol, sizeof(symbol));
add_assoc_string(&XHPROF_G(stats_count), key, symbol);
}
/**
* Checks to see if it is time to sample the stack.
* Calls hp_sample_stack() if its time.
*
* @param entries func stack as linked list of hp_entry_t
* @param last_sample time the last sample was taken
* @param sampling_intr sampling interval in microsecs
* @return void
* @author veeve
*/
void hp_sample_check(hp_entry_t **entries)
{
/* Validate input */
if (!entries || !(*entries)) {
return;
}
/* See if its time to sample. While loop is to handle a single function
* taking a long time and passing several sampling intervals. */
while ((cycle_timer() - XHPROF_G(last_sample_tsc)) > XHPROF_G(sampling_interval_tsc)) {
/* bump last_sample_tsc */
XHPROF_G(last_sample_tsc) += XHPROF_G(sampling_interval_tsc);
/* bump last_sample_time - HAS TO BE UPDATED BEFORE calling hp_sample_stack */
incr_us_interval(&XHPROF_G(last_sample_time), XHPROF_G(sampling_interval));
/* sample the stack */
hp_sample_stack(entries);
}
}
/**
* ***********************
* High precision timer related functions.
* ***********************
*/
static inline zend_ulong cycle_timer()
{
#if defined(__APPLE__) && defined(__MACH__)
return mach_absolute_time() / XHPROF_G(timebase_conversion);
#elif defined(ZEND_WIN32)
LARGE_INTEGER lt = {0};
QueryPerformanceCounter(<);
lt.QuadPart *= 1000000;
lt.QuadPart /= performance_frequency.QuadPart;
return lt.QuadPart;
#else
struct timespec s;
clock_gettime(CLOCK_MONOTONIC, &s);
return s.tv_sec * 1000 * 1000 + s.tv_nsec / 1000;
#endif
}
/**
* Get the current real CPU clock timer
*/
static zend_ulong cpu_timer()
{
#if defined(CLOCK_PROCESS_CPUTIME_ID)
struct timespec s;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &s);
return s.tv_sec * 1000 * 1000 + s.tv_nsec / 1000;
#else
struct rusage ru;
getrusage(RUSAGE_SELF, &ru);
return (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec ) * 1000 * 1000 + (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec);
#endif
}
/**
* Incr time with the given microseconds.
*/
static void incr_us_interval(struct timeval *start, zend_ulong incr)
{
incr += (start->tv_sec * 1000000 + start->tv_usec);
start->tv_sec = incr / 1000000;
start->tv_usec = incr % 1000000;
}
/**
* ***************************
* XHPROF DUMMY CALLBACKS
* ***************************
*/
void hp_mode_dummy_init_cb()
{
}
void hp_mode_dummy_exit_cb()
{
}
void hp_mode_dummy_beginfn_cb(hp_entry_t **entries, hp_entry_t *current)
{
}
void hp_mode_dummy_endfn_cb(hp_entry_t **entries)
{
}
/**
* *********************************
* XHPROF INIT MODULE CALLBACKS
* *********************************
*/
/**
* XHPROF_MODE_SAMPLED's init callback
*
* @author veeve
*/
void hp_mode_sampled_init_cb()
{
/* Init the last_sample in tsc */
XHPROF_G(last_sample_tsc) = cycle_timer();
/* Find the microseconds that need to be truncated */
gettimeofday(&XHPROF_G(last_sample_time), 0);
hp_trunc_time(&XHPROF_G(last_sample_time), XHPROF_G(sampling_interval));
/* Convert sampling interval to ticks */
XHPROF_G(sampling_interval_tsc) = XHPROF_G(sampling_interval);
}
/**
* ************************************
* XHPROF BEGIN FUNCTION CALLBACKS
* ************************************
*/
/**
* XHPROF_MODE_HIERARCHICAL's begin function callback
*
* @author kannan
*/
void hp_mode_hier_beginfn_cb(hp_entry_t **entries, hp_entry_t *current)
{
/* Get start tsc counter */
current->tsc_start = cycle_timer();
/* Get CPU usage */
if (XHPROF_G(xhprof_flags) & XHPROF_FLAGS_CPU) {
current->cpu_start = cpu_timer();
}
/* Get memory usage */
if (XHPROF_G(xhprof_flags) & XHPROF_FLAGS_MEMORY) {
current->mu_start_hprof = zend_memory_usage(0);
current->pmu_start_hprof = zend_memory_peak_usage(0);
}
}
/**
* XHPROF_MODE_SAMPLED's begin function callback
*
* @author veeve
*/
void hp_mode_sampled_beginfn_cb(hp_entry_t **entries, hp_entry_t *current)
{
/* See if its time to take a sample */
hp_sample_check(entries);
}
/**
* **********************************
* XHPROF END FUNCTION CALLBACKS
* **********************************
*/
/**
* XHPROF_MODE_HIERARCHICAL's end function callback
*
* @author kannan
*/
void hp_mode_hier_endfn_cb(hp_entry_t **entries)
{
hp_entry_t *top = (*entries);
zval *counts;
char symbol[SCRATCH_BUF_LEN];
long int mu_end;
long int pmu_end;
double wt, cpu;
#if PHP_VERSION_ID >= 80000
if (top->is_trace == 0) {
XHPROF_G(func_hash_counters[top->hash_code])--;
return;
}
#endif
/* Get end tsc counter */
wt = cycle_timer() - top->tsc_start;
/* Get the stat array */
hp_get_function_stack(top, 2, symbol, sizeof(symbol));
counts = zend_hash_str_find(Z_ARRVAL(XHPROF_G(stats_count)), symbol, strlen(symbol));
if (counts == NULL) {
zval count_val;
array_init(&count_val);
counts = zend_hash_str_update(Z_ARRVAL(XHPROF_G(stats_count)), symbol, strlen(symbol), &count_val);
}
/* Bump stats in the counts hashtable */
hp_inc_count(counts, "ct", 1);
hp_inc_count(counts, "wt", wt);
if (XHPROF_G(xhprof_flags) & XHPROF_FLAGS_CPU) {
cpu = cpu_timer() - top->cpu_start;
/* Bump CPU stats in the counts hashtable */
hp_inc_count(counts, "cpu", cpu);
}
if (XHPROF_G(xhprof_flags) & XHPROF_FLAGS_MEMORY) {
/* Get Memory usage */
mu_end = zend_memory_usage(0);
pmu_end = zend_memory_peak_usage(0);
/* Bump Memory stats in the counts hashtable */
hp_inc_count(counts, "mu", mu_end - top->mu_start_hprof);
hp_inc_count(counts, "pmu", pmu_end - top->pmu_start_hprof);
}
XHPROF_G(func_hash_counters[top->hash_code])--;
}
/**
* XHPROF_MODE_SAMPLED's end function callback
*
* @author veeve
*/
void hp_mode_sampled_endfn_cb(hp_entry_t **entries)
{
/* See if its time to take a sample */
hp_sample_check(entries);
}
/**
* ***************************
* PHP EXECUTE/COMPILE PROXIES
* ***************************
*/
/**
* XHProf enable replaced the zend_execute function with this
* new execute function. We can do whatever profiling we need to
* before and after calling the actual zend_execute().
*
* @author hzhao, kannan
*/
#if PHP_VERSION_ID >= 80000
static void tracer_observer_begin(zend_execute_data *execute_data) {
#if PHP_VERSION_ID >= 80200
if (execute_data->func->type == ZEND_INTERNAL_FUNCTION) {
return;