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The hprof_init.c Java example source code
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
/* Main source file, the basic JVMTI connection/startup code. */
#include "hprof.h"
#include "java_crw_demo.h"
/*
* This file contains all the startup logic (Agent_Onload) and
* connection to the JVMTI interface.
* All JVMTI Event callbacks are in this file.
* All setting of global data (gdata) is done here.
* Options are parsed here.
* Option help messages are here.
* Termination handled here (VM_DEATH) and shutdown (Agent_OnUnload).
* Spawning of the cpu sample loop thread and listener thread is done here.
*
* Use of private 'static' data has been limited, most shared static data
* should be found in the GlobalData structure pointed to by gdata
* (see hprof.h).
*
*/
/* The default output filenames. */
#define DEFAULT_TXT_SUFFIX ".txt"
#define DEFAULT_OUTPUTFILE "java.hprof"
#define DEFAULT_OUTPUTTEMP "java.hprof.temp"
/* The only global variable, defined by this library */
GlobalData *gdata;
/* Experimental options */
#define EXPERIMENT_NO_EARLY_HOOK 0x1
/* Default trace depth */
#define DEFAULT_TRACE_DEPTH 4
/* Default sample interval */
#define DEFAULT_SAMPLE_INTERVAL 10
/* Default cutoff */
#define DEFAULT_CUTOFF_POINT 0.0001
/* Stringize macros for help. */
#define _TO_STR(a) #a
#define TO_STR(a) _TO_STR(a)
/* Macros to surround callback code (non-VM_DEATH callbacks).
* Note that this just keeps a count of the non-VM_DEATH callbacks that
* are currently active, it does not prevent these callbacks from
* operating in parallel. It's the VM_DEATH callback that will wait
* for all these callbacks to either complete and block, or just block.
* We need to hold back these threads so they don't die during the final
* VM_DEATH processing.
* If the VM_DEATH callback is active in the beginning, then this callback
* just blocks to prevent further execution of the thread.
* If the VM_DEATH callback is active at the end, then this callback
* will notify the VM_DEATH callback if it's the last one.
* In all cases, the last thing they do is Enter/Exit the monitor
* gdata->callbackBlock, which will block this callback if VM_DEATH
* is running.
*
* WARNING: No not 'return' or 'goto' out of the BEGIN_CALLBACK/END_CALLBACK
* block, this will mess up the count.
*/
#define BEGIN_CALLBACK() \
{ /* BEGIN OF CALLBACK */ \
jboolean bypass; \
rawMonitorEnter(gdata->callbackLock); \
if (gdata->vm_death_callback_active) { \
/* VM_DEATH is active, we will bypass the CALLBACK CODE */ \
bypass = JNI_TRUE; \
rawMonitorExit(gdata->callbackLock); \
/* Bypassed CALLBACKS block here until VM_DEATH done */ \
rawMonitorEnter(gdata->callbackBlock); \
rawMonitorExit(gdata->callbackBlock); \
} else { \
/* We will be executing the CALLBACK CODE in this case */ \
gdata->active_callbacks++; \
bypass = JNI_FALSE; \
rawMonitorExit(gdata->callbackLock); \
} \
if ( !bypass ) { \
/* BODY OF CALLBACK CODE (with no callback locks held) */
#define END_CALLBACK() /* Part of bypass if body */ \
rawMonitorEnter(gdata->callbackLock); \
gdata->active_callbacks--; \
/* If VM_DEATH is active, and last one, send notify. */ \
if (gdata->vm_death_callback_active) { \
if (gdata->active_callbacks == 0) { \
rawMonitorNotifyAll(gdata->callbackLock); \
} \
} \
rawMonitorExit(gdata->callbackLock); \
/* Non-Bypassed CALLBACKS block here until VM_DEATH done */ \
rawMonitorEnter(gdata->callbackBlock); \
rawMonitorExit(gdata->callbackBlock); \
} \
} /* END OF CALLBACK */
/* Forward declarations */
static void set_callbacks(jboolean on);
/* ------------------------------------------------------------------- */
/* Global data initialization */
/* Get initialized global data area */
static GlobalData *
get_gdata(void)
{
static GlobalData data;
/* Create initial default values */
(void)memset(&data, 0, sizeof(GlobalData));
data.fd = -1; /* Non-zero file or socket. */
data.heap_fd = -1; /* For heap=dump, see hprof_io */
data.check_fd = -1; /* For heap=dump, see hprof_io */
data.max_trace_depth = DEFAULT_TRACE_DEPTH;
data.prof_trace_depth = DEFAULT_TRACE_DEPTH;
data.sample_interval = DEFAULT_SAMPLE_INTERVAL;
data.lineno_in_traces = JNI_TRUE;
data.output_format = 'a'; /* 'b' for binary */
data.cutoff_point = DEFAULT_CUTOFF_POINT;
data.dump_on_exit = JNI_TRUE;
data.gc_start_time = -1L;
#ifdef DEBUG
data.debug = JNI_TRUE;
data.coredump = JNI_TRUE;
#endif
data.micro_state_accounting = JNI_FALSE;
data.force_output = JNI_TRUE;
data.verbose = JNI_TRUE;
data.primfields = JNI_TRUE;
data.primarrays = JNI_TRUE;
data.table_serial_number_start = 1;
data.class_serial_number_start = 100000;
data.thread_serial_number_start = 200000;
data.trace_serial_number_start = 300000;
data.object_serial_number_start = 400000;
data.frame_serial_number_start = 500000;
data.gref_serial_number_start = 1;
data.table_serial_number_counter = data.table_serial_number_start;
data.class_serial_number_counter = data.class_serial_number_start;
data.thread_serial_number_counter = data.thread_serial_number_start;
data.trace_serial_number_counter = data.trace_serial_number_start;
data.object_serial_number_counter = data.object_serial_number_start;
data.frame_serial_number_counter = data.frame_serial_number_start;
data.gref_serial_number_counter = data.gref_serial_number_start;
data.unknown_thread_serial_num = data.thread_serial_number_counter++;
return &data;
}
/* ------------------------------------------------------------------- */
/* Error handler callback for the java_crw_demo (classfile read write) functions. */
static void
my_crw_fatal_error_handler(const char * msg, const char *file, int line)
{
char errmsg[256];
(void)md_snprintf(errmsg, sizeof(errmsg),
"%s [%s:%d]", msg, file, line);
errmsg[sizeof(errmsg)-1] = 0;
HPROF_ERROR(JNI_TRUE, errmsg);
}
static void
list_all_tables(void)
{
string_list();
class_list();
frame_list();
site_list();
object_list();
trace_list();
monitor_list();
tls_list();
loader_list();
}
/* ------------------------------------------------------------------- */
/* Option Parsing support */
/**
* Socket connection
*/
/*
* Return a socket connect()ed to a "hostname" that is
* accept()ing heap profile data on "port." Return a value <= 0 if
* such a connection can't be made.
*/
static int
connect_to_socket(char *hostname, unsigned short port)
{
int fd;
if (port == 0 || port > 65535) {
HPROF_ERROR(JNI_FALSE, "invalid port number");
return -1;
}
if (hostname == NULL) {
HPROF_ERROR(JNI_FALSE, "hostname is NULL");
return -1;
}
/* create a socket */
fd = md_connect(hostname, port);
return fd;
}
/* Accept a filename, and adjust the name so that it is unique for this PID */
static void
make_unique_filename(char **filename)
{
int fd;
/* Find a file that doesn't exist */
fd = md_open(*filename);
if ( fd >= 0 ) {
int pid;
char *new_name;
char *old_name;
char *prefix;
char suffix[5];
int new_len;
/* Close the file. */
md_close(fd);
/* Make filename name.PID[.txt] */
pid = md_getpid();
old_name = *filename;
new_len = (int)strlen(old_name)+64;
new_name = HPROF_MALLOC(new_len);
prefix = old_name;
suffix[0] = 0;
/* Look for .txt suffix if not binary output */
if (gdata->output_format != 'b') {
char *dot;
char *format_suffix;
format_suffix = DEFAULT_TXT_SUFFIX;
(void)strcpy(suffix, format_suffix);
dot = strrchr(old_name, '.');
if ( dot != NULL ) {
int i;
int slen;
int match;
slen = (int)strlen(format_suffix);
match = 1;
for ( i = 0; i < slen; i++ ) {
if ( dot[i]==0 ||
tolower(format_suffix[i]) != tolower(dot[i]) ) {
match = 0;
break;
}
}
if ( match ) {
(void)strcpy(suffix, dot);
*dot = 0; /* truncates prefix and old_name */
}
}
}
/* Construct the name */
(void)md_snprintf(new_name, new_len,
"%s.%d%s", prefix, pid, suffix);
*filename = new_name;
HPROF_FREE(old_name);
/* Odds are with Windows, this file may not be so unique. */
(void)remove(gdata->output_filename);
}
}
static int
get_tok(char **src, char *buf, int buflen, int sep)
{
int len;
char *p;
buf[0] = 0;
if ( **src == 0 ) {
return 0;
}
p = strchr(*src, sep);
if ( p==NULL ) {
len = (int)strlen(*src);
p = (*src) + len;
} else {
/*LINTED*/
len = (int)(p - (*src));
}
if ( (len+1) > buflen ) {
return 0;
}
(void)memcpy(buf, *src, len);
buf[len] = 0;
if ( *p != 0 && *p == sep ) {
(*src) = p+1;
} else {
(*src) = p;
}
return len;
}
static jboolean
setBinarySwitch(char **src, jboolean *ptr)
{
char buf[80];
if (!get_tok(src, buf, (int)sizeof(buf), ',')) {
return JNI_FALSE;
}
if (strcmp(buf, "y") == 0) {
*ptr = JNI_TRUE;
} else if (strcmp(buf, "n") == 0) {
*ptr = JNI_FALSE;
} else {
return JNI_FALSE;
}
return JNI_TRUE;
}
static void
print_usage(void)
{
(void)fprintf(stdout,
"\n"
" HPROF: Heap and CPU Profiling Agent (JVMTI Demonstration Code)\n"
"\n"
AGENTNAME " usage: java " AGENTLIB "=[help]|[<option>=, ...]\n"
"\n"
"Option Name and Value Description Default\n"
"--------------------- ----------- -------\n"
"heap=dump|sites|all heap profiling all\n"
"cpu=samples|times|old CPU usage off\n"
"monitor=y|n monitor contention n\n"
"format=a|b text(txt) or binary output a\n"
"file=<file> write data to file " DEFAULT_OUTPUTFILE "[{" DEFAULT_TXT_SUFFIX "}]\n"
"net=<host>: send data over a socket off\n"
"depth=<size> stack trace depth " TO_STR(DEFAULT_TRACE_DEPTH) "\n"
"interval=<ms> sample interval in ms " TO_STR(DEFAULT_SAMPLE_INTERVAL) "\n"
"cutoff=<value> output cutoff point " TO_STR(DEFAULT_CUTOFF_POINT) "\n"
"lineno=y|n line number in traces? y\n"
"thread=y|n thread in traces? n\n"
"doe=y|n dump on exit? y\n"
"msa=y|n Solaris micro state accounting n\n"
"force=y|n force output to <file> y\n"
"verbose=y|n print messages about dumps y\n"
"\n"
"Obsolete Options\n"
"----------------\n"
"gc_okay=y|n\n"
#ifdef DEBUG
"\n"
"DEBUG Option Description Default\n"
"------------ ----------- -------\n"
"primfields=y|n include primitive field values y\n"
"primarrays=y|n include primitive array values y\n"
"debugflags=MASK Various debug flags 0\n"
" 0x01 Report refs in and of unprepared classes\n"
"logflags=MASK Logging to stderr 0\n"
" " TO_STR(LOG_DUMP_MISC) " Misc logging\n"
" " TO_STR(LOG_DUMP_LISTS) " Dump out the tables\n"
" " TO_STR(LOG_CHECK_BINARY) " Verify & dump format=b\n"
"coredump=y|n Core dump on fatal n\n"
"errorexit=y|n Exit on any error n\n"
"pause=y|n Pause on onload & echo PID n\n"
"debug=y|n Turn on all debug checking n\n"
"X=MASK Internal use only 0\n"
"\n"
"Environment Variables\n"
"---------------------\n"
"_JAVA_HPROF_OPTIONS\n"
" Options can be added externally via this environment variable.\n"
" Anything contained in it will get a comma prepended to it (if needed),\n"
" then it will be added to the end of the options supplied via the\n"
" " XRUN " or " AGENTLIB " command line option.\n"
#endif
"\n"
"Examples\n"
"--------\n"
" - Get sample cpu information every 20 millisec, with a stack depth of 3:\n"
" java " AGENTLIB "=cpu=samples,interval=20,depth=3 classname\n"
" - Get heap usage information based on the allocation sites:\n"
" java " AGENTLIB "=heap=sites classname\n"
#ifdef DEBUG
" - Using the external option addition with csh, log details on all runs:\n"
" setenv _JAVA_HPROF_OPTIONS \"logflags=0xC\"\n"
" java " AGENTLIB "=cpu=samples classname\n"
" is the same as:\n"
" java " AGENTLIB "=cpu=samples,logflags=0xC classname\n"
#endif
"\n"
"Notes\n"
"-----\n"
" - The option format=b cannot be used with monitor=y.\n"
" - The option format=b cannot be used with cpu=old|times.\n"
" - Use of the " XRUN " interface can still be used, e.g.\n"
" java " XRUN ":[help]|[<option>=, ...]\n"
" will behave exactly the same as:\n"
" java " AGENTLIB "=[help]|[<option>=, ...]\n"
#ifdef DEBUG
" - The debug options and environment variables are available with both java\n"
" and java_g versions.\n"
#endif
"\n"
"Warnings\n"
"--------\n"
" - This is demonstration code for the JVMTI interface and use of BCI,\n"
" it is not an official product or formal part of the JDK.\n"
" - The " XRUN " interface will be removed in a future release.\n"
" - The option format=b is considered experimental, this format may change\n"
" in a future release.\n"
#ifdef DEBUG
" - The obsolete options may be completely removed in a future release.\n"
" - The debug options and environment variables are not considered public\n"
" interfaces and can change or be removed with any type of update of\n"
" " AGENTNAME ", including patches.\n"
#endif
);
}
static void
option_error(char *description)
{
char errmsg[FILENAME_MAX+80];
(void)md_snprintf(errmsg, sizeof(errmsg),
"%s option error: %s (%s)", AGENTNAME, description, gdata->options);
errmsg[sizeof(errmsg)-1] = 0;
HPROF_ERROR(JNI_FALSE, errmsg);
error_exit_process(1);
}
static void
parse_options(char *command_line_options)
{
int file_or_net_option_seen = JNI_FALSE;
char *all_options;
char *extra_options;
char *options;
char *default_filename;
int ulen;
if (command_line_options == 0)
command_line_options = "";
if ((strcmp(command_line_options, "help")) == 0) {
print_usage();
error_exit_process(0);
}
extra_options = getenv("_JAVA_HPROF_OPTIONS");
if ( extra_options == NULL ) {
extra_options = "";
}
all_options = HPROF_MALLOC((int)strlen(command_line_options) +
(int)strlen(extra_options) + 2);
gdata->options = all_options;
(void)strcpy(all_options, command_line_options);
if ( extra_options[0] != 0 ) {
if ( all_options[0] != 0 ) {
(void)strcat(all_options, ",");
}
(void)strcat(all_options, extra_options);
}
options = all_options;
LOG2("parse_options()", all_options);
while (*options) {
char option[16];
char suboption[FILENAME_MAX+1];
char *endptr;
if (!get_tok(&options, option, (int)sizeof(option), '=')) {
option_error("general syntax error parsing options");
}
if (strcmp(option, "file") == 0) {
if ( file_or_net_option_seen ) {
option_error("file or net options should only appear once");
}
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing file=filename");
}
gdata->utf8_output_filename = HPROF_MALLOC((int)strlen(suboption)+1);
(void)strcpy(gdata->utf8_output_filename, suboption);
file_or_net_option_seen = JNI_TRUE;
} else if (strcmp(option, "net") == 0) {
char port_number[16];
if (file_or_net_option_seen ) {
option_error("file or net options should only appear once");
}
if (!get_tok(&options, suboption, (int)sizeof(suboption), ':')) {
option_error("net option missing ':'");
}
if (!get_tok(&options, port_number, (int)sizeof(port_number), ',')) {
option_error("net option missing port");
}
gdata->net_hostname = HPROF_MALLOC((int)strlen(suboption)+1);
(void)strcpy(gdata->net_hostname, suboption);
gdata->net_port = (int)strtol(port_number, NULL, 10);
file_or_net_option_seen = JNI_TRUE;
} else if (strcmp(option, "format") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing format=a|b");
}
if (strcmp(suboption, "a") == 0) {
gdata->output_format = 'a';
} else if (strcmp(suboption, "b") == 0) {
gdata->output_format = 'b';
} else {
option_error("format option value must be a|b");
}
} else if (strcmp(option, "depth") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing depth=DECIMAL");
}
gdata->max_trace_depth = (int)strtol(suboption, &endptr, 10);
if ((endptr != NULL && *endptr != 0) || gdata->max_trace_depth < 0) {
option_error("depth option value must be decimal and >= 0");
}
gdata->prof_trace_depth = gdata->max_trace_depth;
} else if (strcmp(option, "interval") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing interval=DECIMAL");
}
gdata->sample_interval = (int)strtol(suboption, &endptr, 10);
if ((endptr != NULL && *endptr != 0) || gdata->sample_interval <= 0) {
option_error("interval option value must be decimal and > 0");
}
} else if (strcmp(option, "cutoff") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing cutoff=DOUBLE");
}
gdata->cutoff_point = strtod(suboption, &endptr);
if ((endptr != NULL && *endptr != 0) || gdata->cutoff_point < 0) {
option_error("cutoff option value must be floating point and >= 0");
}
} else if (strcmp(option, "cpu") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing cpu=y|samples|times|old");
}
if ((strcmp(suboption, "samples") == 0) ||
(strcmp(suboption, "y") == 0)) {
gdata->cpu_sampling = JNI_TRUE;
} else if (strcmp(suboption, "times") == 0) {
gdata->cpu_timing = JNI_TRUE;
gdata->old_timing_format = JNI_FALSE;
} else if (strcmp(suboption, "old") == 0) {
gdata->cpu_timing = JNI_TRUE;
gdata->old_timing_format = JNI_TRUE;
} else {
option_error("cpu option value must be y|samples|times|old");
}
} else if (strcmp(option, "heap") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("syntax error parsing heap=dump|sites|all");
}
if (strcmp(suboption, "dump") == 0) {
gdata->heap_dump = JNI_TRUE;
} else if (strcmp(suboption, "sites") == 0) {
gdata->alloc_sites = JNI_TRUE;
} else if (strcmp(suboption, "all") == 0) {
gdata->heap_dump = JNI_TRUE;
gdata->alloc_sites = JNI_TRUE;
} else {
option_error("heap option value must be dump|sites|all");
}
} else if( strcmp(option,"lineno") == 0) {
if ( !setBinarySwitch(&options, &(gdata->lineno_in_traces)) ) {
option_error("lineno option value must be y|n");
}
} else if( strcmp(option,"thread") == 0) {
if ( !setBinarySwitch(&options, &(gdata->thread_in_traces)) ) {
option_error("thread option value must be y|n");
}
} else if( strcmp(option,"doe") == 0) {
if ( !setBinarySwitch(&options, &(gdata->dump_on_exit)) ) {
option_error("doe option value must be y|n");
}
} else if( strcmp(option,"msa") == 0) {
if ( !setBinarySwitch(&options, &(gdata->micro_state_accounting)) ) {
option_error("msa option value must be y|n");
}
} else if( strcmp(option,"force") == 0) {
if ( !setBinarySwitch(&options, &(gdata->force_output)) ) {
option_error("force option value must be y|n");
}
} else if( strcmp(option,"verbose") == 0) {
if ( !setBinarySwitch(&options, &(gdata->verbose)) ) {
option_error("verbose option value must be y|n");
}
} else if( strcmp(option,"primfields") == 0) {
if ( !setBinarySwitch(&options, &(gdata->primfields)) ) {
option_error("primfields option value must be y|n");
}
} else if( strcmp(option,"primarrays") == 0) {
if ( !setBinarySwitch(&options, &(gdata->primarrays)) ) {
option_error("primarrays option value must be y|n");
}
} else if( strcmp(option,"monitor") == 0) {
if ( !setBinarySwitch(&options, &(gdata->monitor_tracing)) ) {
option_error("monitor option value must be y|n");
}
} else if( strcmp(option,"gc_okay") == 0) {
if ( !setBinarySwitch(&options, &(gdata->gc_okay)) ) {
option_error("gc_okay option value must be y|n");
}
} else if (strcmp(option, "logflags") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("logflags option value must be numeric");
}
gdata->logflags = (int)strtol(suboption, NULL, 0);
} else if (strcmp(option, "debugflags") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("debugflags option value must be numeric");
}
gdata->debugflags = (int)strtol(suboption, NULL, 0);
} else if (strcmp(option, "coredump") == 0) {
if ( !setBinarySwitch(&options, &(gdata->coredump)) ) {
option_error("coredump option value must be y|n");
}
} else if (strcmp(option, "exitpause") == 0) {
option_error("The exitpause option was removed, use -XX:OnError='cmd %%p'");
} else if (strcmp(option, "errorexit") == 0) {
if ( !setBinarySwitch(&options, &(gdata->errorexit)) ) {
option_error("errorexit option value must be y|n");
}
} else if (strcmp(option, "pause") == 0) {
if ( !setBinarySwitch(&options, &(gdata->pause)) ) {
option_error("pause option value must be y|n");
}
} else if (strcmp(option, "debug") == 0) {
if ( !setBinarySwitch(&options, &(gdata->debug)) ) {
option_error("debug option value must be y|n");
}
} else if (strcmp(option, "precrash") == 0) {
option_error("The precrash option was removed, use -XX:OnError='precrash -p %%p'");
} else if (strcmp(option, "X") == 0) {
if (!get_tok(&options, suboption, (int)sizeof(suboption), ',')) {
option_error("X option value must be numeric");
}
gdata->experiment = (int)strtol(suboption, NULL, 0);
} else {
char errmsg[80];
(void)strcpy(errmsg, "Unknown option: ");
(void)strcat(errmsg, option);
option_error(errmsg);
}
}
if (gdata->output_format == 'b') {
if (gdata->cpu_timing) {
option_error("cpu=times|old is not supported with format=b");
}
if (gdata->monitor_tracing) {
option_error("monitor=y is not supported with format=b");
}
}
if (gdata->old_timing_format) {
gdata->prof_trace_depth = 2;
}
if (gdata->output_format == 'b') {
default_filename = DEFAULT_OUTPUTFILE;
} else {
default_filename = DEFAULT_OUTPUTFILE DEFAULT_TXT_SUFFIX;
}
if (!file_or_net_option_seen) {
gdata->utf8_output_filename = HPROF_MALLOC((int)strlen(default_filename)+1);
(void)strcpy(gdata->utf8_output_filename, default_filename);
}
if ( gdata->utf8_output_filename != NULL ) {
/* UTF-8 to platform encoding (fill in gdata->output_filename) */
ulen = (int)strlen(gdata->utf8_output_filename);
gdata->output_filename = (char*)HPROF_MALLOC(ulen*3+3);
#ifdef SKIP_NPT
(void)strcpy(gdata->output_filename, gdata->utf8_output_filename);
#else
(void)(gdata->npt->utf8ToPlatform)
(gdata->npt->utf, (jbyte*)gdata->utf8_output_filename, ulen,
gdata->output_filename, ulen*3+3);
#endif
}
/* By default we turn on gdata->alloc_sites and gdata->heap_dump */
if ( !gdata->cpu_timing &&
!gdata->cpu_sampling &&
!gdata->monitor_tracing &&
!gdata->alloc_sites &&
!gdata->heap_dump) {
gdata->heap_dump = JNI_TRUE;
gdata->alloc_sites = JNI_TRUE;
}
if ( gdata->alloc_sites || gdata->heap_dump ) {
gdata->obj_watch = JNI_TRUE;
}
if ( gdata->obj_watch || gdata->cpu_timing ) {
gdata->bci = JNI_TRUE;
}
/* Create files & sockets needed */
if (gdata->heap_dump) {
char *base;
int len;
/* Get a fast tempfile for the heap information */
base = gdata->output_filename;
if ( base==NULL ) {
base = default_filename;
}
len = (int)strlen(base);
gdata->heapfilename = HPROF_MALLOC(len + 5);
(void)strcpy(gdata->heapfilename, base);
(void)strcat(gdata->heapfilename, ".TMP");
make_unique_filename(&(gdata->heapfilename));
(void)remove(gdata->heapfilename);
if (gdata->output_format == 'b') {
if ( gdata->logflags & LOG_CHECK_BINARY ) {
char * check_suffix;
check_suffix = ".check" DEFAULT_TXT_SUFFIX;
gdata->checkfilename =
HPROF_MALLOC((int)strlen(default_filename)+
(int)strlen(check_suffix)+1);
(void)strcpy(gdata->checkfilename, default_filename);
(void)strcat(gdata->checkfilename, check_suffix);
(void)remove(gdata->checkfilename);
gdata->check_fd = md_creat(gdata->checkfilename);
}
if ( gdata->debug ) {
gdata->logflags |= LOG_CHECK_BINARY;
}
gdata->heap_fd = md_creat_binary(gdata->heapfilename);
} else {
gdata->heap_fd = md_creat(gdata->heapfilename);
}
if ( gdata->heap_fd < 0 ) {
char errmsg[FILENAME_MAX+80];
(void)md_snprintf(errmsg, sizeof(errmsg),
"can't create temp heap file: %s", gdata->heapfilename);
errmsg[sizeof(errmsg)-1] = 0;
HPROF_ERROR(JNI_TRUE, errmsg);
}
}
if ( gdata->net_port > 0 ) {
LOG2("Agent_OnLoad", "Connecting to socket");
gdata->fd = connect_to_socket(gdata->net_hostname, (unsigned short)gdata->net_port);
if (gdata->fd <= 0) {
char errmsg[120];
(void)md_snprintf(errmsg, sizeof(errmsg),
"can't connect to %s:%u", gdata->net_hostname, gdata->net_port);
errmsg[sizeof(errmsg)-1] = 0;
HPROF_ERROR(JNI_FALSE, errmsg);
error_exit_process(1);
}
gdata->socket = JNI_TRUE;
} else {
/* If going out to a file, obey the force=y|n option */
if ( !gdata->force_output ) {
make_unique_filename(&(gdata->output_filename));
}
/* Make doubly sure this file does NOT exist */
(void)remove(gdata->output_filename);
/* Create the file */
if (gdata->output_format == 'b') {
gdata->fd = md_creat_binary(gdata->output_filename);
} else {
gdata->fd = md_creat(gdata->output_filename);
}
if (gdata->fd < 0) {
char errmsg[FILENAME_MAX+80];
(void)md_snprintf(errmsg, sizeof(errmsg),
"can't create profile file: %s", gdata->output_filename);
errmsg[sizeof(errmsg)-1] = 0;
HPROF_ERROR(JNI_FALSE, errmsg);
error_exit_process(1);
}
}
}
/* ------------------------------------------------------------------- */
/* Data reset and dump functions */
static void
reset_all_data(void)
{
if (gdata->cpu_sampling || gdata->cpu_timing || gdata->monitor_tracing) {
rawMonitorEnter(gdata->data_access_lock);
}
if (gdata->cpu_sampling || gdata->cpu_timing) {
trace_clear_cost();
}
if (gdata->monitor_tracing) {
monitor_clear();
}
if (gdata->cpu_sampling || gdata->cpu_timing || gdata->monitor_tracing) {
rawMonitorExit(gdata->data_access_lock);
}
}
static void reset_class_load_status(JNIEnv *env, jthread thread);
static void
dump_all_data(JNIEnv *env)
{
verbose_message("Dumping");
if (gdata->monitor_tracing) {
verbose_message(" contended monitor usage ...");
tls_dump_monitor_state(env);
monitor_write_contended_time(env, gdata->cutoff_point);
}
if (gdata->heap_dump) {
verbose_message(" Java heap ...");
/* Update the class table */
reset_class_load_status(env, NULL);
site_heapdump(env);
}
if (gdata->alloc_sites) {
verbose_message(" allocation sites ...");
site_write(env, 0, gdata->cutoff_point);
}
if (gdata->cpu_sampling) {
verbose_message(" CPU usage by sampling running threads ...");
trace_output_cost(env, gdata->cutoff_point);
}
if (gdata->cpu_timing) {
if (!gdata->old_timing_format) {
verbose_message(" CPU usage by timing methods ...");
trace_output_cost(env, gdata->cutoff_point);
} else {
verbose_message(" CPU usage in old prof format ...");
trace_output_cost_in_prof_format(env);
}
}
reset_all_data();
io_flush();
verbose_message(" done.\n");
}
/* ------------------------------------------------------------------- */
/* Dealing with class load and unload status */
static void
reset_class_load_status(JNIEnv *env, jthread thread)
{
WITH_LOCAL_REFS(env, 1) {
jint class_count;
jclass *classes;
jint i;
/* Get all classes from JVMTI, make sure they are in the class table. */
getLoadedClasses(&classes, &class_count);
/* We don't know if the class list has changed really, so we
* guess by the class count changing. Don't want to do
* a bunch of work on classes when it's unnecessary.
* I assume that even though we have global references on the
* jclass object that the class is still considered unloaded.
* (e.g. GC of jclass isn't required for it to be included
* in the unloaded list, or not in the load list)
* [Note: Use of Weak references was a performance problem.]
*/
if ( class_count != gdata->class_count ) {
rawMonitorEnter(gdata->data_access_lock); {
/* Unmark the classes in the load list */
class_all_status_remove(CLASS_IN_LOAD_LIST);
/* Pretend like it was a class load event */
for ( i = 0 ; i < class_count ; i++ ) {
jobject loader;
loader = getClassLoader(classes[i]);
event_class_load(env, thread, classes[i], loader);
}
/* Process the classes that have been unloaded */
class_do_unloads(env);
} rawMonitorExit(gdata->data_access_lock);
}
/* Free the space and save the count. */
jvmtiDeallocate(classes);
gdata->class_count = class_count;
} END_WITH_LOCAL_REFS;
}
/* A GC or Death event has happened, so do some cleanup */
static void
object_free_cleanup(JNIEnv *env, jboolean force_class_table_reset)
{
Stack *stack;
/* Then we process the ObjectFreeStack */
rawMonitorEnter(gdata->object_free_lock); {
stack = gdata->object_free_stack;
gdata->object_free_stack = NULL; /* Will trigger new stack */
} rawMonitorExit(gdata->object_free_lock);
/* Notice we just grabbed the stack of freed objects so
* any object free events will create a new stack.
*/
if ( stack != NULL ) {
int count;
int i;
count = stack_depth(stack);
/* If we saw something freed in this GC */
if ( count > 0 ) {
for ( i = 0 ; i < count ; i++ ) {
ObjectIndex object_index;
jlong tag;
tag = *(jlong*)stack_element(stack,i);
object_index = tag_extract(tag);
(void)object_free(object_index);
}
/* We reset the class load status (only do this once) */
reset_class_load_status(env, NULL);
force_class_table_reset = JNI_FALSE;
}
/* Just terminate this stack object */
stack_term(stack);
}
/* We reset the class load status if we haven't and need to */
if ( force_class_table_reset ) {
reset_class_load_status(env, NULL);
}
}
/* Main function for thread that watches for GC finish events */
static void JNICALL
gc_finish_watcher(jvmtiEnv *jvmti, JNIEnv *env, void *p)
{
jboolean active;
active = JNI_TRUE;
/* Indicate the watcher thread is active */
rawMonitorEnter(gdata->gc_finish_lock); {
gdata->gc_finish_active = JNI_TRUE;
} rawMonitorExit(gdata->gc_finish_lock);
/* Loop while active */
while ( active ) {
jboolean do_cleanup;
do_cleanup = JNI_FALSE;
rawMonitorEnter(gdata->gc_finish_lock); {
/* Don't wait if VM_DEATH wants us to quit */
if ( gdata->gc_finish_stop_request ) {
/* Time to terminate */
active = JNI_FALSE;
} else {
/* Wait for notification to do cleanup, or terminate */
rawMonitorWait(gdata->gc_finish_lock, 0);
/* After wait, check to see if VM_DEATH wants us to quit */
if ( gdata->gc_finish_stop_request ) {
/* Time to terminate */
active = JNI_FALSE;
}
}
if ( active && gdata->gc_finish > 0 ) {
/* Time to cleanup, reset count and prepare for cleanup */
gdata->gc_finish = 0;
do_cleanup = JNI_TRUE;
}
} rawMonitorExit(gdata->gc_finish_lock);
/* Do the cleanup if requested outside gc_finish_lock */
if ( do_cleanup ) {
/* Free up all freed objects, don't force class table reset
* We cannot let the VM_DEATH complete while we are doing
* this cleanup. So if during this, VM_DEATH happens,
* the VM_DEATH callback should block waiting for this
* loop to terminate, and send a notification to the
* VM_DEATH thread.
*/
object_free_cleanup(env, JNI_FALSE);
/* Cleanup the tls table where the Thread objects were GC'd */
tls_garbage_collect(env);
}
}
/* Falling out means VM_DEATH is happening, we need to notify VM_DEATH
* that we are done doing the cleanup. VM_DEATH is waiting on this
* notify.
*/
rawMonitorEnter(gdata->gc_finish_lock); {
gdata->gc_finish_active = JNI_FALSE;
rawMonitorNotifyAll(gdata->gc_finish_lock);
} rawMonitorExit(gdata->gc_finish_lock);
}
/* ------------------------------------------------------------------- */
/* JVMTI Event callback functions */
static void
setup_event_mode(jboolean onload_set_only, jvmtiEventMode state)
{
if ( onload_set_only ) {
setEventNotificationMode(state,
JVMTI_EVENT_VM_INIT, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_VM_DEATH, NULL);
if (gdata->bci) {
setEventNotificationMode(state,
JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL);
}
} else {
/* Enable all other JVMTI events of interest now. */
setEventNotificationMode(state,
JVMTI_EVENT_THREAD_START, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_THREAD_END, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_CLASS_LOAD, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_CLASS_PREPARE, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_DATA_DUMP_REQUEST, NULL);
if (gdata->cpu_timing) {
setEventNotificationMode(state,
JVMTI_EVENT_EXCEPTION_CATCH, NULL);
}
if (gdata->monitor_tracing) {
setEventNotificationMode(state,
JVMTI_EVENT_MONITOR_WAIT, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_MONITOR_WAITED, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_MONITOR_CONTENDED_ENTER, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, NULL);
}
if (gdata->obj_watch) {
setEventNotificationMode(state,
JVMTI_EVENT_OBJECT_FREE, NULL);
}
setEventNotificationMode(state,
JVMTI_EVENT_GARBAGE_COLLECTION_START, NULL);
setEventNotificationMode(state,
JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL);
}
}
/* JVMTI_EVENT_VM_INIT */
static void JNICALL
cbVMInit(jvmtiEnv *jvmti, JNIEnv *env, jthread thread)
{
rawMonitorEnter(gdata->data_access_lock); {
LoaderIndex loader_index;
ClassIndex cnum;
TlsIndex tls_index;
gdata->jvm_initializing = JNI_TRUE;
/* Header to use in heap dumps */
gdata->header = "JAVA PROFILE 1.0.1";
gdata->segmented = JNI_FALSE;
if (gdata->output_format == 'b') {
/* We need JNI here to call in and get the current maximum memory */
gdata->maxMemory = getMaxMemory(env);
gdata->maxHeapSegment = (jlong)2000000000;
/* More than 2Gig triggers segments and 1.0.2 */
if ( gdata->maxMemory >= gdata->maxHeapSegment ) {
gdata->header = "JAVA PROFILE 1.0.2";
gdata->segmented = JNI_TRUE; /* 1.0.2 */
}
}
/* We write the initial header after the VM initializes now
* because we needed to use JNI to get maxMemory and determine if
* a 1.0.1 or a 1.0.2 header will be used.
* This used to be done in Agent_OnLoad.
*/
io_write_file_header();
LOG("cbVMInit begin");
/* Create a system loader entry first */
loader_index = loader_find_or_create(NULL,NULL);
/* Find the thread jclass (does JNI calls) */
gdata->thread_cnum = class_find_or_create("Ljava/lang/Thread;",
loader_index);
class_add_status(gdata->thread_cnum, CLASS_SYSTEM);
/* Issue fake system thread start */
tls_index = tls_find_or_create(env, thread);
/* Setup the Tracker class (should be first class in table) */
tracker_setup_class();
/* Find selected system classes to keep track of */
gdata->system_class_size = 0;
cnum = class_find_or_create("Ljava/lang/Object;", loader_index);
gdata->system_trace_index = tls_get_trace(tls_index, env,
gdata->max_trace_depth, JNI_FALSE);
gdata->system_object_site_index = site_find_or_create(
cnum, gdata->system_trace_index);
/* Used to ID HPROF generated items */
gdata->hprof_trace_index = tls_get_trace(tls_index, env,
gdata->max_trace_depth, JNI_FALSE);
gdata->hprof_site_index = site_find_or_create(
cnum, gdata->hprof_trace_index);
if ( gdata->logflags & LOG_DUMP_LISTS ) {
list_all_tables();
}
/* Prime the class table */
reset_class_load_status(env, thread);
/* Find the tracker jclass and jmethodID's (does JNI calls) */
if ( gdata->bci ) {
tracker_setup_methods(env);
}
/* Start any agent threads (does JNI, JVMTI, and Java calls) */
/* Thread to watch for gc_finish events */
rawMonitorEnter(gdata->gc_finish_lock); {
createAgentThread(env, "HPROF gc_finish watcher",
&gc_finish_watcher);
} rawMonitorExit(gdata->gc_finish_lock);
/* Start up listener thread if we need it */
if ( gdata->socket ) {
listener_init(env);
}
/* Start up cpu sampling thread if we need it */
if ( gdata->cpu_sampling ) {
/* Note: this could also get started later (see cpu) */
cpu_sample_init(env);
}
/* Setup event modes */
setup_event_mode(JNI_FALSE, JVMTI_ENABLE);
/* Engage tracking (sets Java Tracker field so injections call into
* agent library).
*/
if ( gdata->bci ) {
tracker_engage(env);
}
/* Indicate the VM is initialized now */
gdata->jvm_initialized = JNI_TRUE;
gdata->jvm_initializing = JNI_FALSE;
LOG("cbVMInit end");
} rawMonitorExit(gdata->data_access_lock);
}
/* JVMTI_EVENT_VM_DEATH */
static void JNICALL
cbVMDeath(jvmtiEnv *jvmti, JNIEnv *env)
{
/*
* Use local flag to minimize gdata->dump_lock hold time.
*/
jboolean need_to_dump = JNI_FALSE;
LOG("cbVMDeath");
/* Shutdown thread watching gc_finish, outside CALLBACK locks.
* We need to make sure the watcher thread is done doing any cleanup
* work before we continue here.
*/
rawMonitorEnter(gdata->gc_finish_lock); {
/* Notify watcher thread to finish up, it will send
* another notify when done. If the watcher thread is busy
* cleaning up, it will detect gc_finish_stop_request when it's done.
* Then it sets gc_finish_active to JNI_FALSE and will notify us.
* If the watcher thread is waiting to be notified, then the
* notification wakes it up.
* We do not want to do the VM_DEATH while the gc_finish
* watcher thread is in the middle of a cleanup.
*/
gdata->gc_finish_stop_request = JNI_TRUE;
rawMonitorNotifyAll(gdata->gc_finish_lock);
/* Wait for the gc_finish watcher thread to notify us it's done */
while ( gdata->gc_finish_active ) {
rawMonitorWait(gdata->gc_finish_lock,0);
}
} rawMonitorExit(gdata->gc_finish_lock);
/* The gc_finish watcher thread should be done now, or done shortly. */
/* BEGIN_CALLBACK/END_CALLBACK handling. */
/* The callbackBlock prevents any active callbacks from returning
* back to the VM, and also blocks all new callbacks.
* We want to prevent any threads from premature death, so
* that we don't have worry about that during thread queries
* in this final dump process.
*/
rawMonitorEnter(gdata->callbackBlock); {
/* We need to wait for all callbacks actively executing to block
* on exit, and new ones will block on entry.
* The BEGIN_CALLBACK/END_CALLBACK macros keep track of callbacks
* that are active.
* Once the last active callback is done, it will notify this
* thread and block.
*/
rawMonitorEnter(gdata->callbackLock); {
/* Turn off native calls */
if ( gdata->bci ) {
tracker_disengage(env);
}
gdata->vm_death_callback_active = JNI_TRUE;
while (gdata->active_callbacks > 0) {
rawMonitorWait(gdata->callbackLock, 0);
}
} rawMonitorExit(gdata->callbackLock);
/* Now we know that no threads will die on us, being blocked
* on some event callback, at a minimum ThreadEnd.
*/
/* Make some basic checks. */
rawMonitorEnter(gdata->data_access_lock); {
if ( gdata->jvm_initializing ) {
HPROF_ERROR(JNI_TRUE, "VM Death during VM Init");
return;
}
if ( !gdata->jvm_initialized ) {
HPROF_ERROR(JNI_TRUE, "VM Death before VM Init");
return;
}
if (gdata->jvm_shut_down) {
HPROF_ERROR(JNI_TRUE, "VM Death more than once?");
return;
}
} rawMonitorExit(gdata->data_access_lock);
/* Shutdown the cpu loop thread */
if ( gdata->cpu_sampling ) {
cpu_sample_term(env);
}
/* Time to dump the final data */
rawMonitorEnter(gdata->dump_lock); {
gdata->jvm_shut_down = JNI_TRUE;
if (!gdata->dump_in_process) {
need_to_dump = JNI_TRUE;
gdata->dump_in_process = JNI_TRUE;
/*
* Setting gdata->dump_in_process will cause cpu sampling to pause
* (if we are sampling). We don't resume sampling after the
* dump_all_data() call below because the VM is shutting
* down.
*/
}
} rawMonitorExit(gdata->dump_lock);
/* Dump everything if we need to */
if (gdata->dump_on_exit && need_to_dump) {
dump_all_data(env);
}
/* Disable all events and callbacks now, all of them.
* NOTE: It's important that this be done after the dump
* it prevents other threads from messing up the data
* because they will block on ThreadStart and ThreadEnd
* events due to the CALLBACK block.
*/
set_callbacks(JNI_FALSE);
setup_event_mode(JNI_FALSE, JVMTI_DISABLE);
setup_event_mode(JNI_TRUE, JVMTI_DISABLE);
/* Write tail of file */
io_write_file_footer();
} rawMonitorExit(gdata->callbackBlock);
/* Shutdown the listener thread and socket, or flush I/O buffers */
if (gdata->socket) {
listener_term(env);
} else {
io_flush();
}
/* Close the file descriptors down */
if ( gdata->fd >= 0 ) {
(void)md_close(gdata->fd);
gdata->fd = -1;
if ( gdata->logflags & LOG_CHECK_BINARY ) {
if (gdata->output_format == 'b' && gdata->output_filename != NULL) {
check_binary_file(gdata->output_filename);
}
}
}
if ( gdata->heap_fd >= 0 ) {
(void)md_close(gdata->heap_fd);
gdata->heap_fd = -1;
}
if ( gdata->check_fd >= 0 ) {
(void)md_close(gdata->check_fd);
gdata->check_fd = -1;
}
/* Remove the temporary heap file */
if (gdata->heap_dump) {
(void)remove(gdata->heapfilename);
}
/* If logging, dump the tables */
if ( gdata->logflags & LOG_DUMP_LISTS ) {
list_all_tables();
}
/* Make sure all global references are deleted */
class_delete_global_references(env);
loader_delete_global_references(env);
tls_delete_global_references(env);
}
/* JVMTI_EVENT_THREAD_START */
static void JNICALL
cbThreadStart(jvmtiEnv *jvmti, JNIEnv *env, jthread thread)
{
LOG3("cbThreadStart", "thread is", (int)(long)(ptrdiff_t)thread);
BEGIN_CALLBACK() {
event_thread_start(env, thread);
} END_CALLBACK();
}
/* JVMTI_EVENT_THREAD_END */
static void JNICALL
cbThreadEnd(jvmtiEnv *jvmti, JNIEnv *env, jthread thread)
{
LOG3("cbThreadEnd", "thread is", (int)(long)(ptrdiff_t)thread);
BEGIN_CALLBACK() {
event_thread_end(env, thread);
} END_CALLBACK();
}
/* JVMTI_EVENT_CLASS_FILE_LOAD_HOOK */
static void JNICALL
cbClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv* env,
jclass class_being_redefined, jobject loader,
const char* name, jobject protection_domain,
jint class_data_len, const unsigned char* class_data,
jint* new_class_data_len, unsigned char** new_class_data)
{
/* WARNING: This will be called before VM_INIT. */
LOG2("cbClassFileLoadHook:",(name==NULL?"Unknown":name));
if (!gdata->bci) {
return;
}
BEGIN_CALLBACK() {
rawMonitorEnter(gdata->data_access_lock); {
const char *classname;
if ( gdata->bci_counter == 0 ) {
/* Prime the system classes */
class_prime_system_classes();
}
gdata->bci_counter++;
*new_class_data_len = 0;
*new_class_data = NULL;
/* Name could be NULL */
if ( name == NULL ) {
classname = ((JavaCrwDemoClassname)
(gdata->java_crw_demo_classname_function))
(class_data, class_data_len, &my_crw_fatal_error_handler);
if ( classname == NULL ) {
HPROF_ERROR(JNI_TRUE, "No classname in classfile");
}
} else {
classname = strdup(name);
if ( classname == NULL ) {
HPROF_ERROR(JNI_TRUE, "Ran out of malloc() space");
}
}
/* The tracker class itself? */
if ( strcmp(classname, TRACKER_CLASS_NAME) != 0 ) {
ClassIndex cnum;
int system_class;
unsigned char * new_image;
long new_length;
int len;
char *signature;
LoaderIndex loader_index;
LOG2("cbClassFileLoadHook injecting class" , classname);
/* Define a unique class number for this class */
len = (int)strlen(classname);
signature = HPROF_MALLOC(len+3);
signature[0] = JVM_SIGNATURE_CLASS;
(void)memcpy(signature+1, classname, len);
signature[len+1] = JVM_SIGNATURE_ENDCLASS;
signature[len+2] = 0;
loader_index = loader_find_or_create(env,loader);
if ( class_being_redefined != NULL ) {
cnum = class_find_or_create(signature, loader_index);
} else {
cnum = class_create(signature, loader_index);
}
HPROF_FREE(signature);
signature = NULL;
/* Make sure class doesn't get unloaded by accident */
class_add_status(cnum, CLASS_IN_LOAD_LIST);
/* Is it a system class? */
system_class = 0;
if ( (!gdata->jvm_initialized)
&& (!gdata->jvm_initializing)
&& ( ( class_get_status(cnum) & CLASS_SYSTEM) != 0
|| gdata->bci_counter < 8 ) ) {
system_class = 1;
LOG2(classname, " is a system class");
}
new_image = NULL;
new_length = 0;
/* Call the class file reader/write demo code */
((JavaCrwDemo)(gdata->java_crw_demo_function))(
cnum,
classname,
class_data,
class_data_len,
system_class,
TRACKER_CLASS_NAME,
TRACKER_CLASS_SIG,
(gdata->cpu_timing)?TRACKER_CALL_NAME:NULL,
(gdata->cpu_timing)?TRACKER_CALL_SIG:NULL,
(gdata->cpu_timing)?TRACKER_RETURN_NAME:NULL,
(gdata->cpu_timing)?TRACKER_RETURN_SIG:NULL,
(gdata->obj_watch)?TRACKER_OBJECT_INIT_NAME:NULL,
(gdata->obj_watch)?TRACKER_OBJECT_INIT_SIG:NULL,
(gdata->obj_watch)?TRACKER_NEWARRAY_NAME:NULL,
(gdata->obj_watch)?TRACKER_NEWARRAY_SIG:NULL,
&new_image,
&new_length,
&my_crw_fatal_error_handler,
&class_set_methods);
if ( new_length > 0 ) {
unsigned char *jvmti_space;
LOG2("cbClassFileLoadHook DID inject this class", classname);
jvmti_space = (unsigned char *)jvmtiAllocate((jint)new_length);
(void)memcpy((void*)jvmti_space, (void*)new_image, (int)new_length);
*new_class_data_len = (jint)new_length;
*new_class_data = jvmti_space; /* VM will deallocate */
} else {
LOG2("cbClassFileLoadHook DID NOT inject this class", classname);
*new_class_data_len = 0;
*new_class_data = NULL;
}
if ( new_image != NULL ) {
(void)free((void*)new_image); /* Free malloc() space with free() */
}
}
(void)free((void*)classname);
} rawMonitorExit(gdata->data_access_lock);
} END_CALLBACK();
}
/* JVMTI_EVENT_CLASS_LOAD */
static void JNICALL
cbClassLoad(jvmtiEnv *jvmti, JNIEnv *env, jthread thread, jclass klass)
{
/* WARNING: This MAY be called before VM_INIT. */
LOG("cbClassLoad");
BEGIN_CALLBACK() {
rawMonitorEnter(gdata->data_access_lock); {
WITH_LOCAL_REFS(env, 1) {
jobject loader;
loader = getClassLoader(klass);
event_class_load(env, thread, klass, loader);
} END_WITH_LOCAL_REFS;
} rawMonitorExit(gdata->data_access_lock);
} END_CALLBACK();
}
/* JVMTI_EVENT_CLASS_PREPARE */
static void JNICALL
cbClassPrepare(jvmtiEnv *jvmti, JNIEnv *env, jthread thread, jclass klass)
{
/* WARNING: This will be called before VM_INIT. */
LOG("cbClassPrepare");
BEGIN_CALLBACK() {
rawMonitorEnter(gdata->data_access_lock); {
WITH_LOCAL_REFS(env, 1) {
jobject loader;
loader = NULL;
loader = getClassLoader(klass);
event_class_prepare(env, thread, klass, loader);
} END_WITH_LOCAL_REFS;
} rawMonitorExit(gdata->data_access_lock);
} END_CALLBACK();
}
/* JVMTI_EVENT_DATA_DUMP_REQUEST */
static void JNICALL
cbDataDumpRequest(jvmtiEnv *jvmti)
{
jboolean need_to_dump;
LOG("cbDataDumpRequest");
BEGIN_CALLBACK() {
need_to_dump = JNI_FALSE;
rawMonitorEnter(gdata->dump_lock); {
if (!gdata->dump_in_process) {
need_to_dump = JNI_TRUE;
gdata->dump_in_process = JNI_TRUE;
}
} rawMonitorExit(gdata->dump_lock);
if (need_to_dump) {
dump_all_data(getEnv());
rawMonitorEnter(gdata->dump_lock); {
gdata->dump_in_process = JNI_FALSE;
} rawMonitorExit(gdata->dump_lock);
if (gdata->cpu_sampling && !gdata->jvm_shut_down) {
cpu_sample_on(NULL, 0); /* resume sampling */
}
}
} END_CALLBACK();
}
/* JVMTI_EVENT_EXCEPTION_CATCH */
static void JNICALL
cbExceptionCatch(jvmtiEnv *jvmti, JNIEnv* env,
jthread thread, jmethodID method, jlocation location,
jobject exception)
{
LOG("cbExceptionCatch");
BEGIN_CALLBACK() {
event_exception_catch(env, thread, method, location, exception);
} END_CALLBACK();
}
/* JVMTI_EVENT_MONITOR_WAIT */
static void JNICALL
cbMonitorWait(jvmtiEnv *jvmti, JNIEnv* env,
jthread thread, jobject object, jlong timeout)
{
LOG("cbMonitorWait");
BEGIN_CALLBACK() {
monitor_wait_event(env, thread, object, timeout);
} END_CALLBACK();
}
/* JVMTI_EVENT_MONITOR_WAITED */
static void JNICALL
cbMonitorWaited(jvmtiEnv *jvmti, JNIEnv* env,
jthread thread, jobject object, jboolean timed_out)
{
LOG("cbMonitorWaited");
BEGIN_CALLBACK() {
monitor_waited_event(env, thread, object, timed_out);
} END_CALLBACK();
}
/* JVMTI_EVENT_MONITOR_CONTENDED_ENTER */
static void JNICALL
cbMonitorContendedEnter(jvmtiEnv *jvmti, JNIEnv* env,
jthread thread, jobject object)
{
LOG("cbMonitorContendedEnter");
BEGIN_CALLBACK() {
monitor_contended_enter_event(env, thread, object);
} END_CALLBACK();
}
/* JVMTI_EVENT_MONITOR_CONTENDED_ENTERED */
static void JNICALL
cbMonitorContendedEntered(jvmtiEnv *jvmti, JNIEnv* env,
jthread thread, jobject object)
{
LOG("cbMonitorContendedEntered");
BEGIN_CALLBACK() {
monitor_contended_entered_event(env, thread, object);
} END_CALLBACK();
}
/* JVMTI_EVENT_GARBAGE_COLLECTION_START */
static void JNICALL
cbGarbageCollectionStart(jvmtiEnv *jvmti)
{
LOG("cbGarbageCollectionStart");
/* Only calls to Allocate, Deallocate, RawMonitorEnter & RawMonitorExit
* are allowed here (see the JVMTI Spec).
*/
gdata->gc_start_time = md_get_timemillis();
}
/* JVMTI_EVENT_GARBAGE_COLLECTION_FINISH */
static void JNICALL
cbGarbageCollectionFinish(jvmtiEnv *jvmti)
{
LOG("cbGarbageCollectionFinish");
/* Only calls to Allocate, Deallocate, RawMonitorEnter & RawMonitorExit
* are allowed here (see the JVMTI Spec).
*/
if ( gdata->gc_start_time != -1L ) {
gdata->time_in_gc += (md_get_timemillis() - gdata->gc_start_time);
gdata->gc_start_time = -1L;
}
/* Increment gc_finish counter, notify watcher thread */
rawMonitorEnter(gdata->gc_finish_lock); {
/* If VM_DEATH is trying to shut it down, don't do anything at all.
* Never send notify if VM_DEATH wants the watcher thread to quit.
*/
if ( gdata->gc_finish_active ) {
gdata->gc_finish++;
rawMonitorNotifyAll(gdata->gc_finish_lock);
}
} rawMonitorExit(gdata->gc_finish_lock);
}
/* JVMTI_EVENT_OBJECT_FREE */
static void JNICALL
cbObjectFree(jvmtiEnv *jvmti, jlong tag)
{
LOG3("cbObjectFree", "tag", (int)tag);
/* Only calls to Allocate, Deallocate, RawMonitorEnter & RawMonitorExit
* are allowed here (see the JVMTI Spec).
*/
HPROF_ASSERT(tag!=(jlong)0);
rawMonitorEnter(gdata->object_free_lock); {
if ( !gdata->jvm_shut_down ) {
Stack *stack;
stack = gdata->object_free_stack;
if ( stack == NULL ) {
gdata->object_free_stack = stack_init(512, 512, sizeof(jlong));
stack = gdata->object_free_stack;
}
stack_push(stack, (void*)&tag);
}
} rawMonitorExit(gdata->object_free_lock);
}
static void
set_callbacks(jboolean on)
{
jvmtiEventCallbacks callbacks;
(void)memset(&callbacks,0,sizeof(callbacks));
if ( ! on ) {
setEventCallbacks(&callbacks);
return;
}
/* JVMTI_EVENT_VM_INIT */
callbacks.VMInit = &cbVMInit;
/* JVMTI_EVENT_VM_DEATH */
callbacks.VMDeath = &cbVMDeath;
/* JVMTI_EVENT_THREAD_START */
callbacks.ThreadStart = &cbThreadStart;
/* JVMTI_EVENT_THREAD_END */
callbacks.ThreadEnd = &cbThreadEnd;
/* JVMTI_EVENT_CLASS_FILE_LOAD_HOOK */
callbacks.ClassFileLoadHook = &cbClassFileLoadHook;
/* JVMTI_EVENT_CLASS_LOAD */
callbacks.ClassLoad = &cbClassLoad;
/* JVMTI_EVENT_CLASS_PREPARE */
callbacks.ClassPrepare = &cbClassPrepare;
/* JVMTI_EVENT_DATA_DUMP_REQUEST */
callbacks.DataDumpRequest = &cbDataDumpRequest;
/* JVMTI_EVENT_EXCEPTION_CATCH */
callbacks.ExceptionCatch = &cbExceptionCatch;
/* JVMTI_EVENT_MONITOR_WAIT */
callbacks.MonitorWait = &cbMonitorWait;
/* JVMTI_EVENT_MONITOR_WAITED */
callbacks.MonitorWaited = &cbMonitorWaited;
/* JVMTI_EVENT_MONITOR_CONTENDED_ENTER */
callbacks.MonitorContendedEnter = &cbMonitorContendedEnter;
/* JVMTI_EVENT_MONITOR_CONTENDED_ENTERED */
callbacks.MonitorContendedEntered = &cbMonitorContendedEntered;
/* JVMTI_EVENT_GARBAGE_COLLECTION_START */
callbacks.GarbageCollectionStart = &cbGarbageCollectionStart;
/* JVMTI_EVENT_GARBAGE_COLLECTION_FINISH */
callbacks.GarbageCollectionFinish = &cbGarbageCollectionFinish;
/* JVMTI_EVENT_OBJECT_FREE */
callbacks.ObjectFree = &cbObjectFree;
setEventCallbacks(&callbacks);
}
static void
getCapabilities(void)
{
jvmtiCapabilities needed_capabilities;
jvmtiCapabilities potential_capabilities;
/* Fill in ones that we must have */
(void)memset(&needed_capabilities,0,sizeof(needed_capabilities));
needed_capabilities.can_generate_garbage_collection_events = 1;
needed_capabilities.can_tag_objects = 1;
if (gdata->bci) {
needed_capabilities.can_generate_all_class_hook_events = 1;
}
if (gdata->obj_watch) {
needed_capabilities.can_generate_object_free_events = 1;
}
if (gdata->cpu_timing || gdata->cpu_sampling) {
#if 0 /* Not needed until we call JVMTI for CpuTime */
needed_capabilities.can_get_thread_cpu_time = 1;
needed_capabilities.can_get_current_thread_cpu_time = 1;
#endif
needed_capabilities.can_generate_exception_events = 1;
}
if (gdata->monitor_tracing) {
#if 0 /* Not needed until we call JVMTI for CpuTime */
needed_capabilities.can_get_thread_cpu_time = 1;
needed_capabilities.can_get_current_thread_cpu_time = 1;
#endif
needed_capabilities.can_get_owned_monitor_info = 1;
needed_capabilities.can_get_current_contended_monitor = 1;
needed_capabilities.can_get_monitor_info = 1;
needed_capabilities.can_generate_monitor_events = 1;
}
/* Get potential capabilities */
getPotentialCapabilities(&potential_capabilities);
/* Some capabilities would be nicer to have */
needed_capabilities.can_get_source_file_name =
potential_capabilities.can_get_source_file_name;
needed_capabilities.can_get_line_numbers =
potential_capabilities.can_get_line_numbers;
/* Add the capabilities */
addCapabilities(&needed_capabilities);
}
/* Dynamic library loading */
static void *
load_library(char *name)
{
char lname[FILENAME_MAX+1];
char err_buf[256+FILENAME_MAX+1];
char *boot_path;
void *handle;
handle = NULL;
/* The library may be located in different ways, try both, but
* if it comes from outside the SDK/jre it isn't ours.
*/
getSystemProperty("sun.boot.library.path", &boot_path);
md_build_library_name(lname, FILENAME_MAX, boot_path, name);
if ( strlen(lname) == 0 ) {
HPROF_ERROR(JNI_TRUE, "Could not find library");
}
jvmtiDeallocate(boot_path);
handle = md_load_library(lname, err_buf, (int)sizeof(err_buf));
if ( handle == NULL ) {
/* This may be necessary on Windows. */
md_build_library_name(lname, FILENAME_MAX, "", name);
if ( strlen(lname) == 0 ) {
HPROF_ERROR(JNI_TRUE, "Could not find library");
}
handle = md_load_library(lname, err_buf, (int)sizeof(err_buf));
if ( handle == NULL ) {
HPROF_ERROR(JNI_TRUE, err_buf);
}
}
return handle;
}
/* Lookup dynamic function pointer in shared library */
static void *
lookup_library_symbol(void *library, char **symbols, int nsymbols)
{
void *addr;
int i;
addr = NULL;
for( i = 0 ; i < nsymbols; i++ ) {
addr = md_find_library_entry(library, symbols[i]);
if ( addr != NULL ) {
break;
}
}
if ( addr == NULL ) {
char errmsg[256];
(void)md_snprintf(errmsg, sizeof(errmsg),
"Cannot find library symbol '%s'", symbols[0]);
HPROF_ERROR(JNI_TRUE, errmsg);
}
return addr;
}
/* ------------------------------------------------------------------- */
/* The OnLoad interface */
JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM *vm, char *options, void *reserved)
{
char *boot_path = NULL;
char npt_lib[JVM_MAXPATHLEN];
/* See if it's already loaded */
if ( gdata!=NULL && gdata->isLoaded==JNI_TRUE ) {
HPROF_ERROR(JNI_TRUE, "Cannot load this JVM TI agent twice, check your java command line for duplicate hprof options.");
return JNI_ERR;
}
gdata = get_gdata();
gdata->isLoaded = JNI_TRUE;
error_setup();
LOG2("Agent_OnLoad", "gdata setup");
gdata->jvm = vm;
/* Get the JVMTI environment */
getJvmti();
#ifndef SKIP_NPT
getSystemProperty("sun.boot.library.path", &boot_path);
/* Load in NPT library for character conversions */
md_build_library_name(npt_lib, sizeof(npt_lib), boot_path, NPT_LIBNAME);
if ( strlen(npt_lib) == 0 ) {
HPROF_ERROR(JNI_TRUE, "Could not find npt library");
}
jvmtiDeallocate(boot_path);
NPT_INITIALIZE(npt_lib, &(gdata->npt), NPT_VERSION, NULL);
if ( gdata->npt == NULL ) {
HPROF_ERROR(JNI_TRUE, "Cannot load npt library");
}
gdata->npt->utf = (gdata->npt->utfInitialize)(NULL);
if ( gdata->npt->utf == NULL ) {
HPROF_ERROR(JNI_TRUE, "Cannot initialize npt utf functions");
}
#endif
/* Lock needed to protect debug_malloc() code, which is not MT safe */
#ifdef DEBUG
gdata->debug_malloc_lock = createRawMonitor("HPROF debug_malloc lock");
#endif
parse_options(options);
LOG2("Agent_OnLoad", "Has jvmtiEnv and options parsed");
/* Initialize machine dependent code (micro state accounting) */
md_init();
string_init(); /* Table index values look like: 0x10000000 */
class_init(); /* Table index values look like: 0x20000000 */
tls_init(); /* Table index values look like: 0x30000000 */
trace_init(); /* Table index values look like: 0x40000000 */
object_init(); /* Table index values look like: 0x50000000 */
site_init(); /* Table index values look like: 0x60000000 */
frame_init(); /* Table index values look like: 0x70000000 */
monitor_init(); /* Table index values look like: 0x80000000 */
loader_init(); /* Table index values look like: 0x90000000 */
LOG2("Agent_OnLoad", "Tables initialized");
if ( gdata->pause ) {
error_do_pause();
}
getCapabilities();
/* Set the JVMTI callback functions (do this only once)*/
set_callbacks(JNI_TRUE);
/* Create basic locks */
gdata->dump_lock = createRawMonitor("HPROF dump lock");
gdata->data_access_lock = createRawMonitor("HPROF data access lock");
gdata->callbackLock = createRawMonitor("HPROF callback lock");
gdata->callbackBlock = createRawMonitor("HPROF callback block");
gdata->object_free_lock = createRawMonitor("HPROF object free lock");
gdata->gc_finish_lock = createRawMonitor("HPROF gc_finish lock");
/* Set Onload events mode. */
setup_event_mode(JNI_TRUE, JVMTI_ENABLE);
LOG2("Agent_OnLoad", "JVMTI capabilities, callbacks and initial notifications setup");
/* Used in VM_DEATH to wait for callbacks to complete */
gdata->jvm_initializing = JNI_FALSE;
gdata->jvm_initialized = JNI_FALSE;
gdata->vm_death_callback_active = JNI_FALSE;
gdata->active_callbacks = 0;
/* Write the header information */
io_setup();
/* We sample the start time now so that the time increments can be
* placed in the various heap dump segments in micro seconds.
*/
gdata->micro_sec_ticks = md_get_microsecs();
/* Load java_crw_demo library and find function "java_crw_demo" */
if ( gdata->bci ) {
/* Load the library or get the handle to it */
gdata->java_crw_demo_library = load_library("java_crw_demo");
{ /* "java_crw_demo" */
static char *symbols[] = JAVA_CRW_DEMO_SYMBOLS;
gdata->java_crw_demo_function =
lookup_library_symbol(gdata->java_crw_demo_library,
symbols, (int)(sizeof(symbols)/sizeof(char*)));
}
{ /* "java_crw_demo_classname" */
static char *symbols[] = JAVA_CRW_DEMO_CLASSNAME_SYMBOLS;
gdata->java_crw_demo_classname_function =
lookup_library_symbol(gdata->java_crw_demo_library,
symbols, (int)(sizeof(symbols)/sizeof(char*)));
}
}
return JNI_OK;
}
JNIEXPORT void JNICALL
Agent_OnUnload(JavaVM *vm)
{
Stack *stack;
LOG("Agent_OnUnload");
gdata->isLoaded = JNI_FALSE;
stack = gdata->object_free_stack;
gdata->object_free_stack = NULL;
if ( stack != NULL ) {
stack_term(stack);
}
io_cleanup();
loader_cleanup();
tls_cleanup();
monitor_cleanup();
trace_cleanup();
site_cleanup();
object_cleanup();
frame_cleanup();
class_cleanup();
string_cleanup();
/* Deallocate any memory in gdata */
if ( gdata->net_hostname != NULL ) {
HPROF_FREE(gdata->net_hostname);
}
if ( gdata->utf8_output_filename != NULL ) {
HPROF_FREE(gdata->utf8_output_filename);
}
if ( gdata->output_filename != NULL ) {
HPROF_FREE(gdata->output_filename);
}
if ( gdata->heapfilename != NULL ) {
HPROF_FREE(gdata->heapfilename);
}
if ( gdata->checkfilename != NULL ) {
HPROF_FREE(gdata->checkfilename);
}
if ( gdata->options != NULL ) {
HPROF_FREE(gdata->options);
}
/* Verify all allocated memory has been taken care of. */
malloc_police();
/* Cleanup is hard to do when other threads might still be running
* so we skip destroying some raw monitors which still might be in use
* and we skip disposal of the jvmtiEnv* which might still be needed.
* Only raw monitors that could be held by other threads are left
* alone. So we explicitly do NOT do this:
* destroyRawMonitor(gdata->callbackLock);
* destroyRawMonitor(gdata->callbackBlock);
* destroyRawMonitor(gdata->gc_finish_lock);
* destroyRawMonitor(gdata->object_free_lock);
* destroyRawMonitor(gdata->listener_loop_lock);
* destroyRawMonitor(gdata->cpu_loop_lock);
* disposeEnvironment();
* gdata->jvmti = NULL;
*/
/* Destroy basic locks */
destroyRawMonitor(gdata->dump_lock);
gdata->dump_lock = NULL;
destroyRawMonitor(gdata->data_access_lock);
gdata->data_access_lock = NULL;
if ( gdata->cpu_sample_lock != NULL ) {
destroyRawMonitor(gdata->cpu_sample_lock);
gdata->cpu_sample_lock = NULL;
}
#ifdef DEBUG
destroyRawMonitor(gdata->debug_malloc_lock);
gdata->debug_malloc_lock = NULL;
#endif
/* Unload java_crw_demo library */
if ( gdata->bci && gdata->java_crw_demo_library != NULL ) {
md_unload_library(gdata->java_crw_demo_library);
gdata->java_crw_demo_library = NULL;
}
/* You would think you could clear out gdata and set it to NULL, but
* turns out that isn't a good idea. Some of the threads could be
* blocked inside the CALLBACK*() macros, where they got blocked up
* waiting for the VM_DEATH callback to complete. They only have
* some raw monitor actions to do, but they need access to gdata to do it.
* So do not do this:
* (void)memset(gdata, 0, sizeof(GlobalData));
* gdata = NULL;
*/
}
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