Java example source code file (globals.cpp)
The globals.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 "memory/allocation.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/arguments.hpp"
#include "runtime/globals.hpp"
#include "runtime/globals_extension.hpp"
#include "utilities/ostream.hpp"
#include "utilities/macros.hpp"
#include "utilities/top.hpp"
#if INCLUDE_ALL_GCS
#include "gc_implementation/g1/g1_globals.hpp"
#endif // INCLUDE_ALL_GCS
#ifdef COMPILER1
#include "c1/c1_globals.hpp"
#endif
#ifdef COMPILER2
#include "opto/c2_globals.hpp"
#endif
#ifdef SHARK
#include "shark/shark_globals.hpp"
#endif
RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
MATERIALIZE_NOTPRODUCT_FLAG, \
MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
MATERIALIZE_LP64_PRODUCT_FLAG)
RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
MATERIALIZE_NOTPRODUCT_FLAG)
MATERIALIZE_FLAGS_EXT
void Flag::check_writable() {
if (is_constant_in_binary()) {
fatal(err_msg("flag is constant: %s", _name));
}
}
bool Flag::is_bool() const {
return strcmp(_type, "bool") == 0;
}
bool Flag::get_bool() const {
return *((bool*) _addr);
}
void Flag::set_bool(bool value) {
check_writable();
*((bool*) _addr) = value;
}
bool Flag::is_intx() const {
return strcmp(_type, "intx") == 0;
}
intx Flag::get_intx() const {
return *((intx*) _addr);
}
void Flag::set_intx(intx value) {
check_writable();
*((intx*) _addr) = value;
}
bool Flag::is_uintx() const {
return strcmp(_type, "uintx") == 0;
}
uintx Flag::get_uintx() const {
return *((uintx*) _addr);
}
void Flag::set_uintx(uintx value) {
check_writable();
*((uintx*) _addr) = value;
}
bool Flag::is_uint64_t() const {
return strcmp(_type, "uint64_t") == 0;
}
uint64_t Flag::get_uint64_t() const {
return *((uint64_t*) _addr);
}
void Flag::set_uint64_t(uint64_t value) {
check_writable();
*((uint64_t*) _addr) = value;
}
bool Flag::is_double() const {
return strcmp(_type, "double") == 0;
}
double Flag::get_double() const {
return *((double*) _addr);
}
void Flag::set_double(double value) {
check_writable();
*((double*) _addr) = value;
}
bool Flag::is_ccstr() const {
return strcmp(_type, "ccstr") == 0 || strcmp(_type, "ccstrlist") == 0;
}
bool Flag::ccstr_accumulates() const {
return strcmp(_type, "ccstrlist") == 0;
}
ccstr Flag::get_ccstr() const {
return *((ccstr*) _addr);
}
void Flag::set_ccstr(ccstr value) {
check_writable();
*((ccstr*) _addr) = value;
}
Flag::Flags Flag::get_origin() {
return Flags(_flags & VALUE_ORIGIN_MASK);
}
void Flag::set_origin(Flags origin) {
assert((origin & VALUE_ORIGIN_MASK) == origin, "sanity");
_flags = Flags((_flags & ~VALUE_ORIGIN_MASK) | origin);
}
bool Flag::is_default() {
return (get_origin() == DEFAULT);
}
bool Flag::is_ergonomic() {
return (get_origin() == ERGONOMIC);
}
bool Flag::is_command_line() {
return (get_origin() == COMMAND_LINE);
}
bool Flag::is_product() const {
return (_flags & KIND_PRODUCT) != 0;
}
bool Flag::is_manageable() const {
return (_flags & KIND_MANAGEABLE) != 0;
}
bool Flag::is_diagnostic() const {
return (_flags & KIND_DIAGNOSTIC) != 0;
}
bool Flag::is_experimental() const {
return (_flags & KIND_EXPERIMENTAL) != 0;
}
bool Flag::is_notproduct() const {
return (_flags & KIND_NOT_PRODUCT) != 0;
}
bool Flag::is_develop() const {
return (_flags & KIND_DEVELOP) != 0;
}
bool Flag::is_read_write() const {
return (_flags & KIND_READ_WRITE) != 0;
}
bool Flag::is_commercial() const {
return (_flags & KIND_COMMERCIAL) != 0;
}
/**
* Returns if this flag is a constant in the binary. Right now this is
* true for notproduct and develop flags in product builds.
*/
bool Flag::is_constant_in_binary() const {
#ifdef PRODUCT
return is_notproduct() || is_develop();
#else
return false;
#endif
}
bool Flag::is_unlocker() const {
return strcmp(_name, "UnlockDiagnosticVMOptions") == 0 ||
strcmp(_name, "UnlockExperimentalVMOptions") == 0 ||
is_unlocker_ext();
}
bool Flag::is_unlocked() const {
if (is_diagnostic()) {
return UnlockDiagnosticVMOptions;
}
if (is_experimental()) {
return UnlockExperimentalVMOptions;
}
return is_unlocked_ext();
}
// Get custom message for this locked flag, or return NULL if
// none is available.
void Flag::get_locked_message(char* buf, int buflen) const {
get_locked_message_ext(buf, buflen);
}
bool Flag::is_writeable() const {
return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
}
// All flags except "manageable" are assumed to be internal flags.
// Long term, we need to define a mechanism to specify which flags
// are external/stable and change this function accordingly.
bool Flag::is_external() const {
return is_manageable() || is_external_ext();
}
// Length of format string (e.g. "%.1234s") for printing ccstr below
#define FORMAT_BUFFER_LEN 16
void Flag::print_on(outputStream* st, bool withComments) {
// Don't print notproduct and develop flags in a product build.
if (is_constant_in_binary()) {
return;
}
st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
if (is_bool()) {
st->print("%-16s", get_bool() ? "true" : "false");
}
if (is_intx()) {
st->print("%-16ld", get_intx());
}
if (is_uintx()) {
st->print("%-16lu", get_uintx());
}
if (is_uint64_t()) {
st->print("%-16lu", get_uint64_t());
}
if (is_double()) {
st->print("%-16f", get_double());
}
if (is_ccstr()) {
const char* cp = get_ccstr();
if (cp != NULL) {
const char* eol;
while ((eol = strchr(cp, '\n')) != NULL) {
char format_buffer[FORMAT_BUFFER_LEN];
size_t llen = pointer_delta(eol, cp, sizeof(char));
jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
"%%." SIZE_FORMAT "s", llen);
st->print(format_buffer, cp);
st->cr();
cp = eol+1;
st->print("%5s %-35s += ", "", _name);
}
st->print("%-16s", cp);
}
else st->print("%-16s", "");
}
st->print("%-20");
print_kind(st);
if (withComments) {
#ifndef PRODUCT
st->print("%s", _doc);
#endif
}
st->cr();
}
void Flag::print_kind(outputStream* st) {
struct Data {
int flag;
const char* name;
};
Data data[] = {
{ KIND_C1, "C1" },
{ KIND_C2, "C2" },
{ KIND_ARCH, "ARCH" },
{ KIND_SHARK, "SHARK" },
{ KIND_PLATFORM_DEPENDENT, "pd" },
{ KIND_PRODUCT, "product" },
{ KIND_MANAGEABLE, "manageable" },
{ KIND_DIAGNOSTIC, "diagnostic" },
{ KIND_EXPERIMENTAL, "experimental" },
{ KIND_COMMERCIAL, "commercial" },
{ KIND_NOT_PRODUCT, "notproduct" },
{ KIND_DEVELOP, "develop" },
{ KIND_LP64_PRODUCT, "lp64_product" },
{ KIND_READ_WRITE, "rw" },
{ -1, "" }
};
if ((_flags & KIND_MASK) != 0) {
st->print("{");
bool is_first = true;
for (int i = 0; data[i].flag != -1; i++) {
Data d = data[i];
if ((_flags & d.flag) != 0) {
if (is_first) {
is_first = false;
} else {
st->print(" ");
}
st->print(d.name);
}
}
st->print("}");
}
}
void Flag::print_as_flag(outputStream* st) {
if (is_bool()) {
st->print("-XX:%s%s", get_bool() ? "+" : "-", _name);
} else if (is_intx()) {
st->print("-XX:%s=" INTX_FORMAT, _name, get_intx());
} else if (is_uintx()) {
st->print("-XX:%s=" UINTX_FORMAT, _name, get_uintx());
} else if (is_uint64_t()) {
st->print("-XX:%s=" UINT64_FORMAT, _name, get_uint64_t());
} else if (is_double()) {
st->print("-XX:%s=%f", _name, get_double());
} else if (is_ccstr()) {
st->print("-XX:%s=", _name);
const char* cp = get_ccstr();
if (cp != NULL) {
// Need to turn embedded '\n's back into separate arguments
// Not so efficient to print one character at a time,
// but the choice is to do the transformation to a buffer
// and print that. And this need not be efficient.
for (; *cp != '\0'; cp += 1) {
switch (*cp) {
default:
st->print("%c", *cp);
break;
case '\n':
st->print(" -XX:%s=", _name);
break;
}
}
}
} else {
ShouldNotReachHere();
}
}
// 4991491 do not "optimize out" the was_set false values: omitting them
// tickles a Microsoft compiler bug causing flagTable to be malformed
#define NAME(name) NOT_PRODUCT(&name) PRODUCT_ONLY(&CONST_##name)
#define RUNTIME_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT) },
#define RUNTIME_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
#define RUNTIME_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DIAGNOSTIC) },
#define RUNTIME_EXPERIMENTAL_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_EXPERIMENTAL) },
#define RUNTIME_MANAGEABLE_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_MANAGEABLE) },
#define RUNTIME_PRODUCT_RW_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_PRODUCT | Flag::KIND_READ_WRITE) },
#define RUNTIME_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP) },
#define RUNTIME_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
#define RUNTIME_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_NOT_PRODUCT) },
#ifdef _LP64
#define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_LP64_PRODUCT) },
#else
#define RUNTIME_LP64_PRODUCT_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
#endif // _LP64
#define C1_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT) },
#define C1_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
#define C1_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DIAGNOSTIC) },
#define C1_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP) },
#define C1_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
#define C1_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C1 | Flag::KIND_NOT_PRODUCT) },
#define C2_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT) },
#define C2_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
#define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) },
#define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) },
#define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) },
#define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
#define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) },
#define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) },
#define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) },
#define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) },
#define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) },
#define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) },
#define SHARK_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) },
#define SHARK_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
#define SHARK_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) },
#define SHARK_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) },
#define SHARK_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
#define SHARK_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) },
static Flag flagTable[] = {
RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT, RUNTIME_LP64_PRODUCT_FLAG_STRUCT)
RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT)
#if INCLUDE_ALL_GCS
G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT)
#endif // INCLUDE_ALL_GCS
#ifdef COMPILER1
C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_DIAGNOSTIC_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
#endif
#ifdef COMPILER2
C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, C2_PD_DEVELOP_FLAG_STRUCT, C2_PRODUCT_FLAG_STRUCT, C2_PD_PRODUCT_FLAG_STRUCT, C2_DIAGNOSTIC_FLAG_STRUCT, C2_EXPERIMENTAL_FLAG_STRUCT, C2_NOTPRODUCT_FLAG_STRUCT)
#endif
#ifdef SHARK
SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, SHARK_PD_DEVELOP_FLAG_STRUCT, SHARK_PRODUCT_FLAG_STRUCT, SHARK_PD_PRODUCT_FLAG_STRUCT, SHARK_DIAGNOSTIC_FLAG_STRUCT, SHARK_NOTPRODUCT_FLAG_STRUCT)
#endif
ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
FLAGTABLE_EXT
{0, NULL, NULL}
};
Flag* Flag::flags = flagTable;
size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
inline bool str_equal(const char* s, const char* q, size_t len) {
// s is null terminated, q is not!
if (strlen(s) != (unsigned int) len) return false;
return strncmp(s, q, len) == 0;
}
// Search the flag table for a named flag
Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked) {
for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
if (str_equal(current->_name, name, length)) {
// Found a matching entry.
// Don't report notproduct and develop flags in product builds.
if (current->is_constant_in_binary()) {
return NULL;
}
// Report locked flags only if allowed.
if (!(current->is_unlocked() || current->is_unlocker())) {
if (!allow_locked) {
// disable use of locked flags, e.g. diagnostic, experimental,
// commercial... until they are explicitly unlocked
return NULL;
}
}
return current;
}
}
// Flag name is not in the flag table
return NULL;
}
// Compute string similarity based on Dice's coefficient
static float str_similar(const char* str1, const char* str2, size_t len2) {
int len1 = (int) strlen(str1);
int total = len1 + (int) len2;
int hit = 0;
for (int i = 0; i < len1 -1; ++i) {
for (int j = 0; j < (int) len2 -1; ++j) {
if ((str1[i] == str2[j]) && (str1[i+1] == str2[j+1])) {
++hit;
break;
}
}
}
return 2.0f * (float) hit / (float) total;
}
Flag* Flag::fuzzy_match(const char* name, size_t length, bool allow_locked) {
float VMOptionsFuzzyMatchSimilarity = 0.7f;
Flag* match = NULL;
float score;
float max_score = -1;
for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
score = str_similar(current->_name, name, length);
if (score > max_score) {
max_score = score;
match = current;
}
}
if (!(match->is_unlocked() || match->is_unlocker())) {
if (!allow_locked) {
return NULL;
}
}
if (max_score < VMOptionsFuzzyMatchSimilarity) {
return NULL;
}
return match;
}
// Returns the address of the index'th element
static Flag* address_of_flag(CommandLineFlagWithType flag) {
assert((size_t)flag < Flag::numFlags, "bad command line flag index");
return &Flag::flags[flag];
}
bool CommandLineFlagsEx::is_default(CommandLineFlag flag) {
assert((size_t)flag < Flag::numFlags, "bad command line flag index");
Flag* f = &Flag::flags[flag];
return f->is_default();
}
bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
assert((size_t)flag < Flag::numFlags, "bad command line flag index");
Flag* f = &Flag::flags[flag];
return f->is_ergonomic();
}
bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
assert((size_t)flag < Flag::numFlags, "bad command line flag index");
Flag* f = &Flag::flags[flag];
return f->is_command_line();
}
bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
Flag* result = Flag::find_flag((char*)name, strlen(name));
if (result == NULL) return false;
*value = result->is_command_line();
return true;
}
bool CommandLineFlags::boolAt(char* name, size_t len, bool* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_bool()) return false;
*value = result->get_bool();
return true;
}
bool CommandLineFlags::boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_bool()) return false;
bool old_value = result->get_bool();
result->set_bool(*value);
*value = old_value;
result->set_origin(origin);
return true;
}
void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
faddr->set_bool(value);
faddr->set_origin(origin);
}
bool CommandLineFlags::intxAt(char* name, size_t len, intx* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_intx()) return false;
*value = result->get_intx();
return true;
}
bool CommandLineFlags::intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_intx()) return false;
intx old_value = result->get_intx();
result->set_intx(*value);
*value = old_value;
result->set_origin(origin);
return true;
}
void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
faddr->set_intx(value);
faddr->set_origin(origin);
}
bool CommandLineFlags::uintxAt(char* name, size_t len, uintx* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_uintx()) return false;
*value = result->get_uintx();
return true;
}
bool CommandLineFlags::uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_uintx()) return false;
uintx old_value = result->get_uintx();
result->set_uintx(*value);
*value = old_value;
result->set_origin(origin);
return true;
}
void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
faddr->set_uintx(value);
faddr->set_origin(origin);
}
bool CommandLineFlags::uint64_tAt(char* name, size_t len, uint64_t* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_uint64_t()) return false;
*value = result->get_uint64_t();
return true;
}
bool CommandLineFlags::uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_uint64_t()) return false;
uint64_t old_value = result->get_uint64_t();
result->set_uint64_t(*value);
*value = old_value;
result->set_origin(origin);
return true;
}
void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
faddr->set_uint64_t(value);
faddr->set_origin(origin);
}
bool CommandLineFlags::doubleAt(char* name, size_t len, double* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_double()) return false;
*value = result->get_double();
return true;
}
bool CommandLineFlags::doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_double()) return false;
double old_value = result->get_double();
result->set_double(*value);
*value = old_value;
result->set_origin(origin);
return true;
}
void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
faddr->set_double(value);
faddr->set_origin(origin);
}
bool CommandLineFlags::ccstrAt(char* name, size_t len, ccstr* value) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_ccstr()) return false;
*value = result->get_ccstr();
return true;
}
// Contract: Flag will make private copy of the incoming value.
// Outgoing value is always malloc-ed, and caller MUST call free.
bool CommandLineFlags::ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin) {
Flag* result = Flag::find_flag(name, len);
if (result == NULL) return false;
if (!result->is_ccstr()) return false;
ccstr old_value = result->get_ccstr();
char* new_value = NULL;
if (*value != NULL) {
new_value = NEW_C_HEAP_ARRAY(char, strlen(*value)+1, mtInternal);
strcpy(new_value, *value);
}
result->set_ccstr(new_value);
if (result->is_default() && old_value != NULL) {
// Prior value is NOT heap allocated, but was a literal constant.
char* old_value_to_free = NEW_C_HEAP_ARRAY(char, strlen(old_value)+1, mtInternal);
strcpy(old_value_to_free, old_value);
old_value = old_value_to_free;
}
*value = old_value;
result->set_origin(origin);
return true;
}
// Contract: Flag will make private copy of the incoming value.
void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
Flag* faddr = address_of_flag(flag);
guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
ccstr old_value = faddr->get_ccstr();
char* new_value = NEW_C_HEAP_ARRAY(char, strlen(value)+1, mtInternal);
strcpy(new_value, value);
faddr->set_ccstr(new_value);
if (!faddr->is_default() && old_value != NULL) {
// Prior value is heap allocated so free it.
FREE_C_HEAP_ARRAY(char, old_value, mtInternal);
}
faddr->set_origin(origin);
}
extern "C" {
static int compare_flags(const void* void_a, const void* void_b) {
return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
}
}
void CommandLineFlags::printSetFlags(outputStream* out) {
// Print which flags were set on the command line
// note: this method is called before the thread structure is in place
// which means resource allocation cannot be used.
// The last entry is the null entry.
const size_t length = Flag::numFlags - 1;
// Sort
Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
for (size_t i = 0; i < length; i++) {
array[i] = &flagTable[i];
}
qsort(array, length, sizeof(Flag*), compare_flags);
// Print
for (size_t i = 0; i < length; i++) {
if (array[i]->get_origin() /* naked field! */) {
array[i]->print_as_flag(out);
out->print(" ");
}
}
out->cr();
FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
}
#ifndef PRODUCT
void CommandLineFlags::verify() {
assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
}
#endif // PRODUCT
void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
// Print the flags sorted by name
// note: this method is called before the thread structure is in place
// which means resource allocation cannot be used.
// The last entry is the null entry.
const size_t length = Flag::numFlags - 1;
// Sort
Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
for (size_t i = 0; i < length; i++) {
array[i] = &flagTable[i];
}
qsort(array, length, sizeof(Flag*), compare_flags);
// Print
out->print_cr("[Global flags]");
for (size_t i = 0; i < length; i++) {
if (array[i]->is_unlocked()) {
array[i]->print_on(out, withComments);
}
}
FREE_C_HEAP_ARRAY(Flag*, array, mtInternal);
}
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