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The ostream.cpp Java example source code
/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "compiler/compileLog.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/arguments.hpp"
#include "utilities/defaultStream.hpp"
#include "utilities/ostream.hpp"
#include "utilities/top.hpp"
#include "utilities/xmlstream.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "os_linux.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "os_solaris.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_windows
# include "os_windows.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_bsd
# include "os_bsd.inline.hpp"
#endif
extern "C" void jio_print(const char* s); // Declarationtion of jvm method
outputStream::outputStream(int width) {
_width = width;
_position = 0;
_newlines = 0;
_precount = 0;
_indentation = 0;
}
outputStream::outputStream(int width, bool has_time_stamps) {
_width = width;
_position = 0;
_newlines = 0;
_precount = 0;
_indentation = 0;
if (has_time_stamps) _stamp.update();
}
void outputStream::update_position(const char* s, size_t len) {
for (size_t i = 0; i < len; i++) {
char ch = s[i];
if (ch == '\n') {
_newlines += 1;
_precount += _position + 1;
_position = 0;
} else if (ch == '\t') {
int tw = 8 - (_position & 7);
_position += tw;
_precount -= tw-1; // invariant: _precount + _position == total count
} else {
_position += 1;
}
}
}
// Execute a vsprintf, using the given buffer if necessary.
// Return a pointer to the formatted string.
const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
const char* format, va_list ap,
bool add_cr,
size_t& result_len) {
const char* result;
if (add_cr) buflen--;
if (!strchr(format, '%')) {
// constant format string
result = format;
result_len = strlen(result);
if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
} else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
// trivial copy-through format string
result = va_arg(ap, const char*);
result_len = strlen(result);
if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
} else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
result = buffer;
result_len = strlen(result);
} else {
DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
result = buffer;
result_len = buflen - 1;
buffer[result_len] = 0;
}
if (add_cr) {
if (result != buffer) {
strncpy(buffer, result, buflen);
result = buffer;
}
buffer[result_len++] = '\n';
buffer[result_len] = 0;
}
return result;
}
void outputStream::print(const char* format, ...) {
char buffer[O_BUFLEN];
va_list ap;
va_start(ap, format);
size_t len;
const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
write(str, len);
va_end(ap);
}
void outputStream::print_cr(const char* format, ...) {
char buffer[O_BUFLEN];
va_list ap;
va_start(ap, format);
size_t len;
const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
write(str, len);
va_end(ap);
}
void outputStream::vprint(const char *format, va_list argptr) {
char buffer[O_BUFLEN];
size_t len;
const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
write(str, len);
}
void outputStream::vprint_cr(const char* format, va_list argptr) {
char buffer[O_BUFLEN];
size_t len;
const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
write(str, len);
}
void outputStream::fill_to(int col) {
int need_fill = col - position();
sp(need_fill);
}
void outputStream::move_to(int col, int slop, int min_space) {
if (position() >= col + slop)
cr();
int need_fill = col - position();
if (need_fill < min_space)
need_fill = min_space;
sp(need_fill);
}
void outputStream::put(char ch) {
assert(ch != 0, "please fix call site");
char buf[] = { ch, '\0' };
write(buf, 1);
}
#define SP_USE_TABS false
void outputStream::sp(int count) {
if (count < 0) return;
if (SP_USE_TABS && count >= 8) {
int target = position() + count;
while (count >= 8) {
this->write("\t", 1);
count -= 8;
}
count = target - position();
}
while (count > 0) {
int nw = (count > 8) ? 8 : count;
this->write(" ", nw);
count -= nw;
}
}
void outputStream::cr() {
this->write("\n", 1);
}
void outputStream::stamp() {
if (! _stamp.is_updated()) {
_stamp.update(); // start at 0 on first call to stamp()
}
// outputStream::stamp() may get called by ostream_abort(), use snprintf
// to avoid allocating large stack buffer in print().
char buf[40];
jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
print_raw(buf);
}
void outputStream::stamp(bool guard,
const char* prefix,
const char* suffix) {
if (!guard) {
return;
}
print_raw(prefix);
stamp();
print_raw(suffix);
}
void outputStream::date_stamp(bool guard,
const char* prefix,
const char* suffix) {
if (!guard) {
return;
}
print_raw(prefix);
static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
static const int buffer_length = 32;
char buffer[buffer_length];
const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
if (iso8601_result != NULL) {
print_raw(buffer);
} else {
print_raw(error_time);
}
print_raw(suffix);
return;
}
outputStream& outputStream::indent() {
while (_position < _indentation) sp();
return *this;
}
void outputStream::print_jlong(jlong value) {
print(JLONG_FORMAT, value);
}
void outputStream::print_julong(julong value) {
print(JULONG_FORMAT, value);
}
/**
* This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
* <hex-address>: 8 *
* example:
* 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............
* 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... ....
* 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......]
* ...
*
* indent is applied to each line. Ends with a CR.
*/
void outputStream::print_data(void* data, size_t len, bool with_ascii) {
size_t limit = (len + 16) / 16 * 16;
for (size_t i = 0; i < limit; ++i) {
if (i % 16 == 0) {
indent().print("%07x:", i);
}
if (i % 2 == 0) {
print(" ");
}
if (i < len) {
print("%02x", ((unsigned char*)data)[i]);
} else {
print(" ");
}
if ((i + 1) % 16 == 0) {
if (with_ascii) {
print(" ");
for (size_t j = 0; j < 16; ++j) {
size_t idx = i + j - 15;
if (idx < len) {
char c = ((char*)data)[idx];
print("%c", c >= 32 && c <= 126 ? c : '.');
}
}
}
print_cr("");
}
}
}
stringStream::stringStream(size_t initial_size) : outputStream() {
buffer_length = initial_size;
buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
buffer_pos = 0;
buffer_fixed = false;
DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
}
// useful for output to fixed chunks of memory, such as performance counters
stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
buffer_length = fixed_buffer_size;
buffer = fixed_buffer;
buffer_pos = 0;
buffer_fixed = true;
}
void stringStream::write(const char* s, size_t len) {
size_t write_len = len; // number of non-null bytes to write
size_t end = buffer_pos + len + 1; // position after write and final '\0'
if (end > buffer_length) {
if (buffer_fixed) {
// if buffer cannot resize, silently truncate
end = buffer_length;
write_len = end - buffer_pos - 1; // leave room for the final '\0'
} else {
// For small overruns, double the buffer. For larger ones,
// increase to the requested size.
if (end < buffer_length * 2) {
end = buffer_length * 2;
}
char* oldbuf = buffer;
assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
"stringStream is re-allocated with a different ResourceMark");
buffer = NEW_RESOURCE_ARRAY(char, end);
strncpy(buffer, oldbuf, buffer_pos);
buffer_length = end;
}
}
// invariant: buffer is always null-terminated
guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
buffer[buffer_pos + write_len] = 0;
strncpy(buffer + buffer_pos, s, write_len);
buffer_pos += write_len;
// Note that the following does not depend on write_len.
// This means that position and count get updated
// even when overflow occurs.
update_position(s, len);
}
char* stringStream::as_string() {
char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
strncpy(copy, buffer, buffer_pos);
copy[buffer_pos] = 0; // terminating null
return copy;
}
stringStream::~stringStream() {}
xmlStream* xtty;
outputStream* tty;
outputStream* gclog_or_tty;
extern Mutex* tty_lock;
#define EXTRACHARLEN 32
#define CURRENTAPPX ".current"
#define FILENAMEBUFLEN 1024
// convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
char* get_datetime_string(char *buf, size_t len) {
os::local_time_string(buf, len);
int i = (int)strlen(buf);
while (i-- >= 0) {
if (buf[i] == ' ') buf[i] = '_';
else if (buf[i] == ':') buf[i] = '-';
}
return buf;
}
static const char* make_log_name_internal(const char* log_name, const char* force_directory,
int pid, const char* tms) {
const char* basename = log_name;
char file_sep = os::file_separator()[0];
const char* cp;
char pid_text[32];
for (cp = log_name; *cp != '\0'; cp++) {
if (*cp == '/' || *cp == file_sep) {
basename = cp + 1;
}
}
const char* nametail = log_name;
// Compute buffer length
size_t buffer_length;
if (force_directory != NULL) {
buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
strlen(basename) + 1;
} else {
buffer_length = strlen(log_name) + 1;
}
// const char* star = strchr(basename, '*');
const char* pts = strstr(basename, "%p");
int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
if (pid_pos >= 0) {
jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
buffer_length += strlen(pid_text);
}
pts = strstr(basename, "%t");
int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
if (tms_pos >= 0) {
buffer_length += strlen(tms);
}
// Create big enough buffer.
char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
strcpy(buf, "");
if (force_directory != NULL) {
strcat(buf, force_directory);
strcat(buf, os::file_separator());
nametail = basename; // completely skip directory prefix
}
// who is first, %p or %t?
int first = -1, second = -1;
const char *p1st = NULL;
const char *p2nd = NULL;
if (pid_pos >= 0 && tms_pos >= 0) {
// contains both %p and %t
if (pid_pos < tms_pos) {
// case foo%pbar%tmonkey.log
first = pid_pos;
p1st = pid_text;
second = tms_pos;
p2nd = tms;
} else {
// case foo%tbar%pmonkey.log
first = tms_pos;
p1st = tms;
second = pid_pos;
p2nd = pid_text;
}
} else if (pid_pos >= 0) {
// contains %p only
first = pid_pos;
p1st = pid_text;
} else if (tms_pos >= 0) {
// contains %t only
first = tms_pos;
p1st = tms;
}
int buf_pos = (int)strlen(buf);
const char* tail = nametail;
if (first >= 0) {
tail = nametail + first + 2;
strncpy(&buf[buf_pos], nametail, first);
strcpy(&buf[buf_pos + first], p1st);
buf_pos = (int)strlen(buf);
if (second >= 0) {
strncpy(&buf[buf_pos], tail, second - first - 2);
strcpy(&buf[buf_pos + second - first - 2], p2nd);
tail = nametail + second + 2;
}
}
strcat(buf, tail); // append rest of name, or all of name
return buf;
}
// log_name comes from -XX:LogFile=log_name or -Xloggc:log_name
// in log_name, %p => pid1234 and
// %t => YYYY-MM-DD_HH-MM-SS
static const char* make_log_name(const char* log_name, const char* force_directory) {
char timestr[32];
get_datetime_string(timestr, sizeof(timestr));
return make_log_name_internal(log_name, force_directory, os::current_process_id(),
timestr);
}
#ifndef PRODUCT
void test_loggc_filename() {
int pid;
char tms[32];
char i_result[FILENAMEBUFLEN];
const char* o_result;
get_datetime_string(tms, sizeof(tms));
pid = os::current_process_id();
// test.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "test.log", tms);
o_result = make_log_name_internal("test.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
// test-%t-%p.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "test-%s-pid%u.log", tms, pid);
o_result = make_log_name_internal("test-%t-%p.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t-%%p.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
// test-%t%p.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "test-%spid%u.log", tms, pid);
o_result = make_log_name_internal("test-%t%p.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t%%p.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
// %p%t.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "pid%u%s.log", pid, tms);
o_result = make_log_name_internal("%p%t.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p%%t.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
// %p-test.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "pid%u-test.log", pid);
o_result = make_log_name_internal("%p-test.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p-test.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
// %t.log
jio_snprintf(i_result, sizeof(char)*FILENAMEBUFLEN, "%s.log", tms);
o_result = make_log_name_internal("%t.log", NULL, pid, tms);
assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%t.log\", NULL)");
FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
}
#endif // PRODUCT
fileStream::fileStream(const char* file_name) {
_file = fopen(file_name, "w");
if (_file != NULL) {
_need_close = true;
} else {
warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
_need_close = false;
}
}
fileStream::fileStream(const char* file_name, const char* opentype) {
_file = fopen(file_name, opentype);
if (_file != NULL) {
_need_close = true;
} else {
warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
_need_close = false;
}
}
void fileStream::write(const char* s, size_t len) {
if (_file != NULL) {
// Make an unused local variable to avoid warning from gcc 4.x compiler.
size_t count = fwrite(s, 1, len, _file);
}
update_position(s, len);
}
long fileStream::fileSize() {
long size = -1;
if (_file != NULL) {
long pos = ::ftell(_file);
if (::fseek(_file, 0, SEEK_END) == 0) {
size = ::ftell(_file);
}
::fseek(_file, pos, SEEK_SET);
}
return size;
}
char* fileStream::readln(char *data, int count ) {
char * ret = ::fgets(data, count, _file);
//Get rid of annoying \n char
data[::strlen(data)-1] = '\0';
return ret;
}
fileStream::~fileStream() {
if (_file != NULL) {
if (_need_close) fclose(_file);
_file = NULL;
}
}
void fileStream::flush() {
fflush(_file);
}
fdStream::fdStream(const char* file_name) {
_fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
_need_close = true;
}
fdStream::~fdStream() {
if (_fd != -1) {
if (_need_close) close(_fd);
_fd = -1;
}
}
void fdStream::write(const char* s, size_t len) {
if (_fd != -1) {
// Make an unused local variable to avoid warning from gcc 4.x compiler.
size_t count = ::write(_fd, s, (int)len);
}
update_position(s, len);
}
// dump vm version, os version, platform info, build id,
// memory usage and command line flags into header
void gcLogFileStream::dump_loggc_header() {
if (is_open()) {
print_cr(Abstract_VM_Version::internal_vm_info_string());
os::print_memory_info(this);
print("CommandLine flags: ");
CommandLineFlags::printSetFlags(this);
}
}
gcLogFileStream::~gcLogFileStream() {
if (_file != NULL) {
if (_need_close) fclose(_file);
_file = NULL;
}
if (_file_name != NULL) {
FREE_C_HEAP_ARRAY(char, _file_name, mtInternal);
_file_name = NULL;
}
}
gcLogFileStream::gcLogFileStream(const char* file_name) {
_cur_file_num = 0;
_bytes_written = 0L;
_file_name = make_log_name(file_name, NULL);
// gc log file rotation
if (UseGCLogFileRotation && NumberOfGCLogFiles > 1) {
char tempbuf[FILENAMEBUFLEN];
jio_snprintf(tempbuf, sizeof(tempbuf), "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
_file = fopen(tempbuf, "w");
} else {
_file = fopen(_file_name, "w");
}
if (_file != NULL) {
_need_close = true;
dump_loggc_header();
} else {
warning("Cannot open file %s due to %s\n", _file_name, strerror(errno));
_need_close = false;
}
}
void gcLogFileStream::write(const char* s, size_t len) {
if (_file != NULL) {
size_t count = fwrite(s, 1, len, _file);
_bytes_written += count;
}
update_position(s, len);
}
// rotate_log must be called from VMThread at safepoint. In case need change parameters
// for gc log rotation from thread other than VMThread, a sub type of VM_Operation
// should be created and be submitted to VMThread's operation queue. DO NOT call this
// function directly. Currently, it is safe to rotate log at safepoint through VMThread.
// That is, no mutator threads and concurrent GC threads run parallel with VMThread to
// write to gc log file at safepoint. If in future, changes made for mutator threads or
// concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
// must be synchronized.
void gcLogFileStream::rotate_log() {
char time_msg[FILENAMEBUFLEN];
char time_str[EXTRACHARLEN];
char current_file_name[FILENAMEBUFLEN];
char renamed_file_name[FILENAMEBUFLEN];
if (_bytes_written < (jlong)GCLogFileSize) {
return;
}
#ifdef ASSERT
Thread *thread = Thread::current();
assert(thread == NULL ||
(thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
"Must be VMThread at safepoint");
#endif
if (NumberOfGCLogFiles == 1) {
// rotate in same file
rewind();
_bytes_written = 0L;
jio_snprintf(time_msg, sizeof(time_msg), "File %s rotated at %s\n",
_file_name, os::local_time_string((char *)time_str, sizeof(time_str)));
write(time_msg, strlen(time_msg));
dump_loggc_header();
return;
}
#if defined(_WINDOWS)
#ifndef F_OK
#define F_OK 0
#endif
#endif // _WINDOWS
// rotate file in names extended_filename.0, extended_filename.1, ...,
// extended_filename.<NumberOfGCLogFiles - 1>. Current rotation file name will
// have a form of extended_filename.<i>.current where i is the current rotation
// file number. After it reaches max file size, the file will be saved and renamed
// with .current removed from its tail.
size_t filename_len = strlen(_file_name);
if (_file != NULL) {
jio_snprintf(renamed_file_name, filename_len + EXTRACHARLEN, "%s.%d",
_file_name, _cur_file_num);
jio_snprintf(current_file_name, filename_len + EXTRACHARLEN, "%s.%d" CURRENTAPPX,
_file_name, _cur_file_num);
jio_snprintf(time_msg, sizeof(time_msg), "%s GC log file has reached the"
" maximum size. Saved as %s\n",
os::local_time_string((char *)time_str, sizeof(time_str)),
renamed_file_name);
write(time_msg, strlen(time_msg));
fclose(_file);
_file = NULL;
bool can_rename = true;
if (access(current_file_name, F_OK) != 0) {
// current file does not exist?
warning("No source file exists, cannot rename\n");
can_rename = false;
}
if (can_rename) {
if (access(renamed_file_name, F_OK) == 0) {
if (remove(renamed_file_name) != 0) {
warning("Could not delete existing file %s\n", renamed_file_name);
can_rename = false;
}
} else {
// file does not exist, ok to rename
}
}
if (can_rename && rename(current_file_name, renamed_file_name) != 0) {
warning("Could not rename %s to %s\n", _file_name, renamed_file_name);
}
}
_cur_file_num++;
if (_cur_file_num > NumberOfGCLogFiles - 1) _cur_file_num = 0;
jio_snprintf(current_file_name, filename_len + EXTRACHARLEN, "%s.%d" CURRENTAPPX,
_file_name, _cur_file_num);
_file = fopen(current_file_name, "w");
if (_file != NULL) {
_bytes_written = 0L;
_need_close = true;
// reuse current_file_name for time_msg
jio_snprintf(current_file_name, filename_len + EXTRACHARLEN,
"%s.%d", _file_name, _cur_file_num);
jio_snprintf(time_msg, sizeof(time_msg), "%s GC log file created %s\n",
os::local_time_string((char *)time_str, sizeof(time_str)),
current_file_name);
write(time_msg, strlen(time_msg));
dump_loggc_header();
// remove the existing file
if (access(current_file_name, F_OK) == 0) {
if (remove(current_file_name) != 0) {
warning("Could not delete existing file %s\n", current_file_name);
}
}
} else {
warning("failed to open rotation log file %s due to %s\n"
"Turned off GC log file rotation\n",
_file_name, strerror(errno));
_need_close = false;
FLAG_SET_DEFAULT(UseGCLogFileRotation, false);
}
}
defaultStream* defaultStream::instance = NULL;
int defaultStream::_output_fd = 1;
int defaultStream::_error_fd = 2;
FILE* defaultStream::_output_stream = stdout;
FILE* defaultStream::_error_stream = stderr;
#define LOG_MAJOR_VERSION 160
#define LOG_MINOR_VERSION 1
void defaultStream::init() {
_inited = true;
if (LogVMOutput || LogCompilation) {
init_log();
}
}
bool defaultStream::has_log_file() {
// lazily create log file (at startup, LogVMOutput is false even
// if +LogVMOutput is used, because the flags haven't been parsed yet)
// For safer printing during fatal error handling, do not init logfile
// if a VM error has been reported.
if (!_inited && !is_error_reported()) init();
return _log_file != NULL;
}
void defaultStream::init_log() {
// %%% Need a MutexLocker?
const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
const char* try_name = make_log_name(log_name, NULL);
fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
if (!file->is_open()) {
// Try again to open the file.
char warnbuf[O_BUFLEN*2];
jio_snprintf(warnbuf, sizeof(warnbuf),
"Warning: Cannot open log file: %s\n", try_name);
// Note: This feature is for maintainer use only. No need for L10N.
jio_print(warnbuf);
FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
try_name = make_log_name(log_name, os::get_temp_directory());
jio_snprintf(warnbuf, sizeof(warnbuf),
"Warning: Forcing option -XX:LogFile=%s\n", try_name);
jio_print(warnbuf);
delete file;
file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
}
FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
if (file->is_open()) {
_log_file = file;
xmlStream* xs = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
_outer_xmlStream = xs;
if (this == tty) xtty = xs;
// Write XML header.
xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
// (For now, don't bother to issue a DTD for this private format.)
jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
// %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
// we ever get round to introduce that method on the os class
xs->head("hotspot_log version='%d %d'"
" process='%d' time_ms='"INT64_FORMAT"'",
LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
os::current_process_id(), time_ms);
// Write VM version header immediately.
xs->head("vm_version");
xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
xs->tail("name");
xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
xs->tail("release");
xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
xs->tail("info");
xs->tail("vm_version");
// Record information about the command-line invocation.
xs->head("vm_arguments"); // Cf. Arguments::print_on()
if (Arguments::num_jvm_flags() > 0) {
xs->head("flags");
Arguments::print_jvm_flags_on(xs->text());
xs->tail("flags");
}
if (Arguments::num_jvm_args() > 0) {
xs->head("args");
Arguments::print_jvm_args_on(xs->text());
xs->tail("args");
}
if (Arguments::java_command() != NULL) {
xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
xs->tail("command");
}
if (Arguments::sun_java_launcher() != NULL) {
xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
xs->tail("launcher");
}
if (Arguments::system_properties() != NULL) {
xs->head("properties");
// Print it as a java-style property list.
// System properties don't generally contain newlines, so don't bother with unparsing.
for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
xs->text()->print_cr("%s=%s", p->key(), p->value());
}
xs->tail("properties");
}
xs->tail("vm_arguments");
// tty output per se is grouped under the <tty>... element.
xs->head("tty");
// All further non-markup text gets copied to the tty:
xs->_text = this; // requires friend declaration!
} else {
delete(file);
// and leave xtty as NULL
LogVMOutput = false;
DisplayVMOutput = true;
LogCompilation = false;
}
}
// finish_log() is called during normal VM shutdown. finish_log_on_error() is
// called by ostream_abort() after a fatal error.
//
void defaultStream::finish_log() {
xmlStream* xs = _outer_xmlStream;
xs->done("tty");
// Other log forks are appended here, at the End of Time:
CompileLog::finish_log(xs->out()); // write compile logging, if any, now
xs->done("hotspot_log");
xs->flush();
fileStream* file = _log_file;
_log_file = NULL;
delete _outer_xmlStream;
_outer_xmlStream = NULL;
file->flush();
delete file;
}
void defaultStream::finish_log_on_error(char *buf, int buflen) {
xmlStream* xs = _outer_xmlStream;
if (xs && xs->out()) {
xs->done_raw("tty");
// Other log forks are appended here, at the End of Time:
CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
xs->done_raw("hotspot_log");
xs->flush();
fileStream* file = _log_file;
_log_file = NULL;
_outer_xmlStream = NULL;
if (file) {
file->flush();
// Can't delete or close the file because delete and fclose aren't
// async-safe. We are about to die, so leave it to the kernel.
// delete file;
}
}
}
intx defaultStream::hold(intx writer_id) {
bool has_log = has_log_file(); // check before locking
if (// impossible, but who knows?
writer_id == NO_WRITER ||
// bootstrap problem
tty_lock == NULL ||
// can't grab a lock or call Thread::current() if TLS isn't initialized
ThreadLocalStorage::thread() == NULL ||
// developer hook
!SerializeVMOutput ||
// VM already unhealthy
is_error_reported() ||
// safepoint == global lock (for VM only)
(SafepointSynchronize::is_synchronizing() &&
Thread::current()->is_VM_thread())
) {
// do not attempt to lock unless we know the thread and the VM is healthy
return NO_WRITER;
}
if (_writer == writer_id) {
// already held, no need to re-grab the lock
return NO_WRITER;
}
tty_lock->lock_without_safepoint_check();
// got the lock
if (writer_id != _last_writer) {
if (has_log) {
_log_file->bol();
// output a hint where this output is coming from:
_log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
}
_last_writer = writer_id;
}
_writer = writer_id;
return writer_id;
}
void defaultStream::release(intx holder) {
if (holder == NO_WRITER) {
// nothing to release: either a recursive lock, or we scribbled (too bad)
return;
}
if (_writer != holder) {
return; // already unlocked, perhaps via break_tty_lock_for_safepoint
}
_writer = NO_WRITER;
tty_lock->unlock();
}
// Yuck: jio_print does not accept char*/len.
static void call_jio_print(const char* s, size_t len) {
char buffer[O_BUFLEN+100];
if (len > sizeof(buffer)-1) {
warning("increase O_BUFLEN in ostream.cpp -- output truncated");
len = sizeof(buffer)-1;
}
strncpy(buffer, s, len);
buffer[len] = '\0';
jio_print(buffer);
}
void defaultStream::write(const char* s, size_t len) {
intx thread_id = os::current_thread_id();
intx holder = hold(thread_id);
if (DisplayVMOutput &&
(_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
// print to output stream. It can be redirected by a vfprintf hook
if (s[len] == '\0') {
jio_print(s);
} else {
call_jio_print(s, len);
}
}
// print to log file
if (has_log_file()) {
int nl0 = _newlines;
xmlTextStream::write(s, len);
// flush the log file too, if there were any newlines
if (nl0 != _newlines){
flush();
}
} else {
update_position(s, len);
}
release(holder);
}
intx ttyLocker::hold_tty() {
if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
intx thread_id = os::current_thread_id();
return defaultStream::instance->hold(thread_id);
}
void ttyLocker::release_tty(intx holder) {
if (holder == defaultStream::NO_WRITER) return;
defaultStream::instance->release(holder);
}
bool ttyLocker::release_tty_if_locked() {
intx thread_id = os::current_thread_id();
if (defaultStream::instance->writer() == thread_id) {
// release the lock and return true so callers know if was
// previously held.
release_tty(thread_id);
return true;
}
return false;
}
void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
if (defaultStream::instance != NULL &&
defaultStream::instance->writer() == holder) {
if (xtty != NULL) {
xtty->print_cr("<!-- safepoint while printing -->");
}
defaultStream::instance->release(holder);
}
// (else there was no lock to break)
}
void ostream_init() {
if (defaultStream::instance == NULL) {
defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
tty = defaultStream::instance;
// We want to ensure that time stamps in GC logs consider time 0
// the time when the JVM is initialized, not the first time we ask
// for a time stamp. So, here, we explicitly update the time stamp
// of tty.
tty->time_stamp().update_to(1);
}
}
void ostream_init_log() {
// For -Xloggc:<file> option - called in runtime/thread.cpp
// Note : this must be called AFTER ostream_init()
gclog_or_tty = tty; // default to tty
if (Arguments::gc_log_filename() != NULL) {
fileStream * gclog = new(ResourceObj::C_HEAP, mtInternal)
gcLogFileStream(Arguments::gc_log_filename());
if (gclog->is_open()) {
// now we update the time stamp of the GC log to be synced up
// with tty.
gclog->time_stamp().update_to(tty->time_stamp().ticks());
}
gclog_or_tty = gclog;
}
// If we haven't lazily initialized the logfile yet, do it now,
// to avoid the possibility of lazy initialization during a VM
// crash, which can affect the stability of the fatal error handler.
defaultStream::instance->has_log_file();
}
// ostream_exit() is called during normal VM exit to finish log files, flush
// output and free resource.
void ostream_exit() {
static bool ostream_exit_called = false;
if (ostream_exit_called) return;
ostream_exit_called = true;
if (gclog_or_tty != tty) {
delete gclog_or_tty;
}
{
// we temporaly disable PrintMallocFree here
// as otherwise it'll lead to using of almost deleted
// tty or defaultStream::instance in logging facility
// of HeapFree(), see 6391258
DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
if (tty != defaultStream::instance) {
delete tty;
}
if (defaultStream::instance != NULL) {
delete defaultStream::instance;
}
}
tty = NULL;
xtty = NULL;
gclog_or_tty = NULL;
defaultStream::instance = NULL;
}
// ostream_abort() is called by os::abort() when VM is about to die.
void ostream_abort() {
// Here we can't delete gclog_or_tty and tty, just flush their output
if (gclog_or_tty) gclog_or_tty->flush();
if (tty) tty->flush();
if (defaultStream::instance != NULL) {
static char buf[4096];
defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
}
}
staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
outputStream *outer_stream) {
_buffer = buffer;
_buflen = buflen;
_outer_stream = outer_stream;
// compile task prints time stamp relative to VM start
_stamp.update_to(1);
}
void staticBufferStream::write(const char* c, size_t len) {
_outer_stream->print_raw(c, (int)len);
}
void staticBufferStream::flush() {
_outer_stream->flush();
}
void staticBufferStream::print(const char* format, ...) {
va_list ap;
va_start(ap, format);
size_t len;
const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
write(str, len);
va_end(ap);
}
void staticBufferStream::print_cr(const char* format, ...) {
va_list ap;
va_start(ap, format);
size_t len;
const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
write(str, len);
va_end(ap);
}
void staticBufferStream::vprint(const char *format, va_list argptr) {
size_t len;
const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
write(str, len);
}
void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
size_t len;
const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
write(str, len);
}
bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
buffer_length = initial_size;
buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
buffer_pos = 0;
buffer_fixed = false;
buffer_max = bufmax;
}
bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
buffer_length = fixed_buffer_size;
buffer = fixed_buffer;
buffer_pos = 0;
buffer_fixed = true;
buffer_max = bufmax;
}
void bufferedStream::write(const char* s, size_t len) {
if(buffer_pos + len > buffer_max) {
flush();
}
size_t end = buffer_pos + len;
if (end >= buffer_length) {
if (buffer_fixed) {
// if buffer cannot resize, silently truncate
len = buffer_length - buffer_pos - 1;
} else {
// For small overruns, double the buffer. For larger ones,
// increase to the requested size.
if (end < buffer_length * 2) {
end = buffer_length * 2;
}
buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
buffer_length = end;
}
}
memcpy(buffer + buffer_pos, s, len);
buffer_pos += len;
update_position(s, len);
}
char* bufferedStream::as_string() {
char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
strncpy(copy, buffer, buffer_pos);
copy[buffer_pos] = 0; // terminating null
return copy;
}
bufferedStream::~bufferedStream() {
if (!buffer_fixed) {
FREE_C_HEAP_ARRAY(char, buffer, mtInternal);
}
}
#ifndef PRODUCT
#if defined(SOLARIS) || defined(LINUX) || defined(_ALLBSD_SOURCE)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
// Network access
networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
_socket = -1;
int result = os::socket(AF_INET, SOCK_STREAM, 0);
if (result <= 0) {
assert(false, "Socket could not be created!");
} else {
_socket = result;
}
}
int networkStream::read(char *buf, size_t len) {
return os::recv(_socket, buf, (int)len, 0);
}
void networkStream::flush() {
if (size() != 0) {
int result = os::raw_send(_socket, (char *)base(), size(), 0);
assert(result != -1, "connection error");
assert(result == (int)size(), "didn't send enough data");
}
reset();
}
networkStream::~networkStream() {
close();
}
void networkStream::close() {
if (_socket != -1) {
flush();
os::socket_close(_socket);
_socket = -1;
}
}
bool networkStream::connect(const char *ip, short port) {
struct sockaddr_in server;
server.sin_family = AF_INET;
server.sin_port = htons(port);
server.sin_addr.s_addr = inet_addr(ip);
if (server.sin_addr.s_addr == (uint32_t)-1) {
struct hostent* host = os::get_host_by_name((char*)ip);
if (host != NULL) {
memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
} else {
return false;
}
}
int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
return (result >= 0);
}
#endif
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