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/*
* Copyright (c) 2002, 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.
*
*/
#include "precompiled.hpp"
#include "code/nmethod.hpp"
#include "memory/allocation.hpp"
#include "memory/allocation.inline.hpp"
#include "memory/resourceArea.hpp"
#include "oops/methodData.hpp"
#include "oops/method.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/vmOperations.hpp"
#include "runtime/vmThread.hpp"
#include "utilities/vmError.hpp"
#include "utilities/xmlstream.hpp"
// Do not assert this condition if there's already another error reported.
#define assert_if_no_error(cond, msg) \
vmassert((cond) || VMError::is_error_reported(), msg)
void xmlStream::initialize(outputStream* out) {
_out = out;
_last_flush = 0;
_markup_state = BODY;
_text_init._outer_xmlStream = this;
_text = &_text_init;
#ifdef ASSERT
_element_depth = 0;
int init_len = 100;
char* init_buf = NEW_C_HEAP_ARRAY(char, init_len, mtInternal);
_element_close_stack_low = init_buf;
_element_close_stack_high = init_buf + init_len;
_element_close_stack_ptr = init_buf + init_len - 1;
_element_close_stack_ptr[0] = '\0';
#endif
// Make sure each log uses the same base for time stamps.
if (is_open()) {
_out->time_stamp().update_to(1);
}
}
#ifdef ASSERT
xmlStream::~xmlStream() {
FREE_C_HEAP_ARRAY(char, _element_close_stack_low);
}
#endif
// Pass the given chars directly to _out.
void xmlStream::write(const char* s, size_t len) {
if (!is_open()) return;
out()->write(s, len);
update_position(s, len);
}
// Pass the given chars directly to _out, except that
// we watch for special "<&>" chars.
// This is suitable for either attribute text or for body text.
// We don't fool with "<![CDATA[" quotes, just single-character entities.
// This makes it easier for dumb tools to parse the output.
void xmlStream::write_text(const char* s, size_t len) {
if (!is_open()) return;
size_t written = 0;
// All normally printed material goes inside XML quotes.
// This leaves the output free to include markup also.
// Scan the string looking for inadvertent "<&>" chars
for (size_t i = 0; i < len; i++) {
char ch = s[i];
// Escape special chars.
const char* esc = NULL;
switch (ch) {
// These are important only in attrs, but we do them always:
case '\'': esc = "'"; break;
case '"': esc = """; break;
case '<': esc = "<"; break;
case '&': esc = "&"; break;
// This is a freebie.
case '>': esc = ">"; break;
}
if (esc != NULL) {
if (written < i) {
out()->write(&s[written], i - written);
written = i;
}
out()->print_raw(esc);
written++;
}
}
// Print the clean remainder. Usually, it is all of s.
if (written < len) {
out()->write(&s[written], len - written);
}
}
// ------------------------------------------------------------------
// Outputs XML text, with special characters quoted.
void xmlStream::text(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_text(format, ap);
va_end(ap);
}
#define BUFLEN 2*K /* max size of output of individual print methods */
// ------------------------------------------------------------------
void xmlStream::va_tag(bool push, const char* format, va_list ap) {
assert_if_no_error(!inside_attrs(), "cannot print tag inside attrs");
char buffer[BUFLEN];
size_t len;
const char* kind = do_vsnprintf(buffer, BUFLEN, format, ap, false, len);
see_tag(kind, push);
print_raw("<");
write(kind, len);
_markup_state = (push ? HEAD : ELEM);
}
#ifdef ASSERT
/// Debugging goo to make sure element tags nest properly.
// ------------------------------------------------------------------
void xmlStream::see_tag(const char* tag, bool push) {
assert_if_no_error(!inside_attrs(), "cannot start new element inside attrs");
if (!push) return;
// tag goes up until either null or space:
const char* tag_end = strchr(tag, ' ');
size_t tag_len = (tag_end == NULL) ? strlen(tag) : tag_end - tag;
assert(tag_len > 0, "tag must not be empty");
// push the tag onto the stack, pulling down the pointer
char* old_ptr = _element_close_stack_ptr;
char* old_low = _element_close_stack_low;
char* push_ptr = old_ptr - (tag_len+1);
if (push_ptr < old_low) {
int old_len = _element_close_stack_high - old_ptr;
int new_len = old_len * 2;
if (new_len < 100) new_len = 100;
char* new_low = NEW_C_HEAP_ARRAY(char, new_len, mtInternal);
char* new_high = new_low + new_len;
char* new_ptr = new_high - old_len;
memcpy(new_ptr, old_ptr, old_len);
_element_close_stack_high = new_high;
_element_close_stack_low = new_low;
_element_close_stack_ptr = new_ptr;
FREE_C_HEAP_ARRAY(char, old_low);
push_ptr = new_ptr - (tag_len+1);
}
assert(push_ptr >= _element_close_stack_low, "in range");
memcpy(push_ptr, tag, tag_len);
push_ptr[tag_len] = 0;
_element_close_stack_ptr = push_ptr;
_element_depth += 1;
}
// ------------------------------------------------------------------
void xmlStream::pop_tag(const char* tag) {
assert_if_no_error(!inside_attrs(), "cannot close element inside attrs");
assert(_element_depth > 0, "must be in an element to close");
assert(*tag != 0, "tag must not be empty");
char* cur_tag = _element_close_stack_ptr;
bool bad_tag = false;
while (*cur_tag != 0 && strcmp(cur_tag, tag) != 0) {
this->print_cr(" ", cur_tag);
_element_close_stack_ptr = (cur_tag += strlen(cur_tag) + 1);
_element_depth -= 1;
bad_tag = true;
}
if (*cur_tag == 0) {
bad_tag = true;
} else {
// Pop the stack, by skipping over the tag and its null.
_element_close_stack_ptr = cur_tag + strlen(cur_tag) + 1;
_element_depth -= 1;
}
if (bad_tag && !VMThread::should_terminate() && !VM_Exit::vm_exited() &&
!VMError::is_error_reported())
{
assert(false, "bad tag in log");
}
}
#endif
// ------------------------------------------------------------------
// First word in formatted string is element kind, and any subsequent
// words must be XML attributes. Outputs "<kind .../>".
void xmlStream::elem(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_elem(format, ap);
va_end(ap);
}
// ------------------------------------------------------------------
void xmlStream::va_elem(const char* format, va_list ap) {
va_begin_elem(format, ap);
end_elem();
}
// ------------------------------------------------------------------
// First word in formatted string is element kind, and any subsequent
// words must be XML attributes. Outputs "<kind ...", not including "/>".
void xmlStream::begin_elem(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_tag(false, format, ap);
va_end(ap);
}
// ------------------------------------------------------------------
void xmlStream::va_begin_elem(const char* format, va_list ap) {
va_tag(false, format, ap);
}
// ------------------------------------------------------------------
// Outputs "/>".
void xmlStream::end_elem() {
assert(_markup_state == ELEM, "misplaced end_elem");
print_raw("/>\n");
_markup_state = BODY;
}
// ------------------------------------------------------------------
// Outputs formatted text, followed by "/>".
void xmlStream::end_elem(const char* format, ...) {
va_list ap;
va_start(ap, format);
out()->vprint(format, ap);
va_end(ap);
end_elem();
}
// ------------------------------------------------------------------
// First word in formatted string is element kind, and any subsequent
// words must be XML attributes. Outputs "<kind ...>".
void xmlStream::head(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_head(format, ap);
va_end(ap);
}
// ------------------------------------------------------------------
void xmlStream::va_head(const char* format, va_list ap) {
va_begin_head(format, ap);
end_head();
}
// ------------------------------------------------------------------
// First word in formatted string is element kind, and any subsequent
// words must be XML attributes. Outputs "<kind ...", not including ">".
void xmlStream::begin_head(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_tag(true, format, ap);
va_end(ap);
}
// ------------------------------------------------------------------
void xmlStream::va_begin_head(const char* format, va_list ap) {
va_tag(true, format, ap);
}
// ------------------------------------------------------------------
// Outputs ">".
void xmlStream::end_head() {
assert(_markup_state == HEAD, "misplaced end_head");
print_raw(">\n");
_markup_state = BODY;
}
// ------------------------------------------------------------------
// Outputs formatted text, followed by ">".
void xmlStream::end_head(const char* format, ...) {
va_list ap;
va_start(ap, format);
out()->vprint(format, ap);
va_end(ap);
end_head();
}
// ------------------------------------------------------------------
// Outputs "</kind>".
void xmlStream::tail(const char* kind) {
pop_tag(kind);
print_raw(");
print_raw(kind);
print_raw(">\n");
}
// ------------------------------------------------------------------
// Outputs "<kind_done ... stamp='D.DD'/> </kind>".
void xmlStream::done(const char* format, ...) {
va_list ap;
va_start(ap, format);
va_done(format, ap);
va_end(ap);
}
// ------------------------------------------------------------------
// Outputs "<kind_done stamp='D.DD'/> </kind>".
// Because done_raw() doesn't need to format strings, it's simpler than
// done(), and can be called safely by fatal error handler.
void xmlStream::done_raw(const char* kind) {
print_raw("<");
print_raw(kind);
print_raw("_done stamp='");
out()->stamp();
print_raw_cr("'/>");
print_raw(");
print_raw(kind);
print_raw_cr(">");
}
// If you remove the PRAGMA, this fails to compile with clang-503.0.40.
PRAGMA_DIAG_PUSH
PRAGMA_FORMAT_NONLITERAL_IGNORED
// ------------------------------------------------------------------
void xmlStream::va_done(const char* format, va_list ap) {
char buffer[200];
size_t format_len = strlen(format);
guarantee(format_len + 10 < sizeof(buffer), "bigger format buffer");
const char* kind = format;
const char* kind_end = strchr(kind, ' ');
size_t kind_len;
if (kind_end != NULL) {
kind_len = kind_end - kind;
int n = os::snprintf(buffer, sizeof(buffer), "%.*s_done", (int)kind_len, kind);
assert((size_t)n < sizeof(buffer), "Unexpected number of characters in string");
} else {
kind_len = format_len;
int n = os::snprintf(buffer, sizeof(buffer), "%s_done%s", kind, kind + kind_len);
assert((size_t)n < sizeof(buffer), "Unexpected number of characters in string");
}
// Output the trailing event with the timestamp.
va_begin_elem(buffer, ap);
stamp();
end_elem();
// Output the tail-tag of the enclosing element.
buffer[kind_len] = 0;
tail(buffer);
}
PRAGMA_DIAG_POP
// Output a timestamp attribute.
void xmlStream::stamp() {
assert_if_no_error(inside_attrs(), "stamp must be an attribute");
print_raw(" stamp='");
out()->stamp();
print_raw("'");
}
// ------------------------------------------------------------------
// Output a method attribute, in the form " method='pkg/cls name sig'".
// This is used only when there is no ciMethod available.
void xmlStream::method(Method* method) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (method == NULL) return;
print_raw(" method='");
method_text(method);
print("' bytes='%d'", method->code_size());
print(" count='%d'", method->invocation_count());
int bec = method->backedge_count();
if (bec != 0) print(" backedge_count='%d'", bec);
print(" iicount='%d'", method->interpreter_invocation_count());
int throwouts = method->interpreter_throwout_count();
if (throwouts != 0) print(" throwouts='%d'", throwouts);
MethodData* mdo = method->method_data();
if (mdo != NULL) {
uint cnt;
cnt = mdo->decompile_count();
if (cnt != 0) print(" decompiles='%d'", cnt);
for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
cnt = mdo->trap_count(reason);
if (cnt != 0) print(" %s_traps='%d'", Deoptimization::trap_reason_name(reason), cnt);
}
cnt = mdo->overflow_trap_count();
if (cnt != 0) print(" overflow_traps='%d'", cnt);
cnt = mdo->overflow_recompile_count();
if (cnt != 0) print(" overflow_recompiles='%d'", cnt);
}
}
void xmlStream::method_text(Method* method) {
ResourceMark rm;
assert_if_no_error(inside_attrs(), "printing attributes");
if (method == NULL) return;
text()->print("%s", method->method_holder()->external_name());
print_raw(" "); // " " is easier for tools to parse than "::"
method->name()->print_symbol_on(text());
print_raw(" "); // separator
method->signature()->print_symbol_on(text());
}
// ------------------------------------------------------------------
// Output a klass attribute, in the form " klass='pkg/cls'".
// This is used only when there is no ciKlass available.
void xmlStream::klass(Klass* klass) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (klass == NULL) return;
print_raw(" klass='");
klass_text(klass);
print_raw("'");
}
void xmlStream::klass_text(Klass* klass) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (klass == NULL) return;
//klass->print_short_name(log->out());
klass->name()->print_symbol_on(out());
}
void xmlStream::name(const Symbol* name) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (name == NULL) return;
print_raw(" name='");
name_text(name);
print_raw("'");
}
void xmlStream::name_text(const Symbol* name) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (name == NULL) return;
//name->print_short_name(text());
name->print_symbol_on(text());
}
void xmlStream::object(const char* attr, Handle x) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (x == NULL) return;
print_raw(" ");
print_raw(attr);
print_raw("='");
object_text(x);
print_raw("'");
}
void xmlStream::object_text(Handle x) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (x == NULL) return;
x->print_value_on(text());
}
void xmlStream::object(const char* attr, Metadata* x) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (x == NULL) return;
print_raw(" ");
print_raw(attr);
print_raw("='");
object_text(x);
print_raw("'");
}
void xmlStream::object_text(Metadata* x) {
assert_if_no_error(inside_attrs(), "printing attributes");
if (x == NULL) return;
//x->print_value_on(text());
if (x->is_method())
method_text((Method*)x);
else if (x->is_klass())
klass_text((Klass*)x);
else
ShouldNotReachHere(); // Add impl if this is reached.
}
void xmlStream::flush() {
out()->flush();
_last_flush = count();
}
void xmlTextStream::flush() {
if (_outer_xmlStream == NULL) return;
_outer_xmlStream->flush();
}
void xmlTextStream::write(const char* str, size_t len) {
if (_outer_xmlStream == NULL) return;
_outer_xmlStream->write_text(str, len);
update_position(str, len);
}
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