< prev index next >
src/share/vm/logging/logStream.cpp
Print this page
rev 13180 : imported patch 8181917-refactor-ul-logstream
rev 13181 : [mq]: 8181917-refactor-ul-logstream-delta-2-to-3
*** 22,34 ****
*
*/
#include "precompiled.hpp"
#include "logging/log.hpp"
! #include "logging/logStream.inline.hpp"
! // Create a log stream without an embedded ResourceMark.
! // The function is placed here to be called out-of-line in log.hpp.
! outputStream* create_log_stream(LogLevelType level, LogTagSet* tagset) {
! return new LogStreamNoResourceMark(level, tagset);
}
--- 22,106 ----
*
*/
#include "precompiled.hpp"
#include "logging/log.hpp"
! #include "logging/logStream.hpp"
! LogStream::LineBuffer::LineBuffer()
! : _buf(_smallbuf), _cap(sizeof(_smallbuf)), _pos(0)
! {
! _buf[0] = '\0';
! }
!
! LogStream::LineBuffer::~LineBuffer() {
! assert(_pos == 0, "still outstanding bytes in the line buffer");
! if (_buf != _smallbuf) {
! os::free(_buf);
! }
! }
!
! // try_ensure_cap tries to enlarge the capacity of the internal buffer
! // to the given atleast value. May fail if either OOM happens or atleast
! // is larger than a reasonable max of 1 M. Caller must not assume
! // capacity without checking.
! void LogStream::LineBuffer::try_ensure_cap(size_t atleast) {
! assert(_cap >= sizeof(_smallbuf), "sanity");
! if (_cap < atleast) {
! const size_t reasonable_max = 1 * M;
! size_t newcap = align_size_up(atleast + 64, 64);
! assert(_cap <= reasonable_max, "sanity");
! // Cap out at a reasonable max to prevent runaway leaks.
! if (newcap > reasonable_max) {
! newcap = reasonable_max;
! }
!
! char* const newbuf = (char*) os::malloc(newcap, mtLogging);
! if (newbuf == NULL) { // OOM. Leave object unchanged.
! return;
! }
! if (_pos > 0) { // preserve old content
! memcpy(newbuf, _buf, _pos + 1); // ..including trailing zero
! }
! if (_buf != _smallbuf) {
! os::free(_buf);
! }
! _buf = newbuf;
! _cap = newcap;
! }
! assert(_cap >= atleast, "sanity");
! }
!
! void LogStream::LineBuffer::append(const char* s, size_t len) {
! assert(_buf[_pos] == '\0', "sanity");
! assert(_pos < _cap, "sanity");
! try_ensure_cap(_pos + len + 1);
! // try_ensure_cap may not have enlarged the capacity to the full requested
! // extend or may have not worked at all. In that case, just gracefully work
! // with what we have already; just truncate if necessary.
! if (_pos + len + 1 > _cap) {
! len = _cap - _pos - 1;
! if (len == 0) {
! return;
! }
! }
! memcpy(_buf + _pos, s, len);
! _pos += len;
! _buf[_pos] = '\0';
! }
!
! void LogStream::LineBuffer::reset() {
! _pos = 0;
! _buf[_pos] = '\0';
! }
!
! void LogStream::write(const char* s, size_t len) {
! if (len > 0 && s[len - 1] == '\n') {
! _current_line.append(s, len - 1); // omit the newline.
! _log_handle.print("%s", _current_line.ptr());
! _current_line.reset();
! } else {
! _current_line.append(s, len);
! }
! update_position(s, len);
}
< prev index next >