/* * Copyright (c) 2014, 2022, 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. *
*/
// We need to skip the NativeCallStack::NativeCallStack frame if a tail call is NOT used // to call os::get_native_stack. A tail call is used if _NMT_NOINLINE_ is not defined // (which means this is not a slowdebug build), and we are on 64-bit (except Windows). // This is not necessarily a rule, but what has been obvserved to date. #if (defined(_NMT_NOINLINE_) || defined(_WINDOWS) || !defined(_LP64) || defined(PPC64) || (defined(BSD) && defined (__aarch64__))) // Not a tail call.
toSkip++; #if (defined(_NMT_NOINLINE_) && defined(BSD) && defined(_LP64)) // Mac OS X slowdebug builds have this odd behavior where NativeCallStack::NativeCallStack // appears as two frames, so we need to skip an extra frame.
toSkip++; #endif// Special-case for BSD. #endif// Not a tail call.
os::get_native_stack(_stack, NMT_TrackingStackDepth, toSkip);
}
NativeCallStack::NativeCallStack(address* pc, int frameCount) { int frameToCopy = (frameCount < NMT_TrackingStackDepth) ?
frameCount : NMT_TrackingStackDepth; int index; for (index = 0; index < frameToCopy; index ++) {
_stack[index] = pc[index];
} for (; index < NMT_TrackingStackDepth; index ++) {
_stack[index] = NULL;
}
}
// number of stack frames captured int NativeCallStack::frames() const { int index; for (index = 0; index < NMT_TrackingStackDepth; index ++) { if (_stack[index] == NULL) { break;
}
} return index;
}
// Decode and print this call path void NativeCallStack::print_on(outputStream* out, int indent) const {
DEBUG_ONLY(assert_not_fake();)
address pc; char buf[1024]; int offset; if (is_empty()) { for (int index = 0; index < indent; index ++) out->print(" ");
out->print("[BOOTSTRAP]");
} else { for (int frame = 0; frame < NMT_TrackingStackDepth; frame ++) {
pc = get_frame(frame); if (pc == NULL) break; // Print indent for (int index = 0; index < indent; index ++) out->print(" "); if (os::dll_address_to_function_name(pc, buf, sizeof(buf), &offset)) {
out->print("[" PTR_FORMAT "] %s+0x%x", p2i(pc), buf, offset);
} else {
out->print("[" PTR_FORMAT "]", p2i(pc));
}
// Note: we deliberately omit printing source information here. NativeCallStack::print_on() // can be called thousands of times as part of NMT detail reporting, and source printing // can slow down reporting by a factor of 5 or more depending on platform (see JDK-8296931).
out->cr();
}
}
}
¤ Dauer der Verarbeitung: 0.23 Sekunden
(vorverarbeitet)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung ist noch experimentell.
