jdk8-mips64-public/hotspot: src/share/vm/runtime/globals.cpp@38a50dd839cf (annotated)

src/share/vm/runtime/globals.cpp@38a50dd839cf (annotated)

src/share/vm/runtime/globals.cpp

Thu, 03 Apr 2008 10:20:44 -0700

author: never
date: Thu, 03 Apr 2008 10:20:44 -0700
changeset 538: 38a50dd839cf
parent 448: 183f41cf8bfe
child 548: ba764ed4b6f2
permissions: -rw-r--r--

6619271: The -Xprintflags causes the VM to segv
Summary: add null checks
Reviewed-by: jrose, kvn

 /*
  * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 # include "incls/_precompiled.incl"
 # include "incls/_globals.cpp.incl"
 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
               MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
               MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG, \
               MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG)
 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
                  MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
                  MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
 bool Flag::is_unlocker() const {
   return strcmp(name, "UnlockDiagnosticVMOptions") == 0;
 }
 bool Flag::is_unlocked() const {
   if (strcmp(kind, "{diagnostic}") == 0) {
     return UnlockDiagnosticVMOptions;
   } else {
     return true;
   }
 }
 bool Flag::is_writeable() const {
   return (strcmp(kind, "{manageable}") == 0 || strcmp(kind, "{product rw}") == 0);
 }
 // All flags except "manageable" are assumed 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 (strcmp(kind, "{manageable}") == 0);
 }
 // Length of format string (e.g. "%.1234s") for printing ccstr below
 #define FORMAT_BUFFER_LEN 16
 void Flag::print_on(outputStream* st) {
   st->print("%5s %-35s %c= ", type, name, (origin != 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_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);
     }
   }
   st->print(" %s", kind);
   st->cr();
 }
 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_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 RUNTIME_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product}", DEFAULT },
 #define RUNTIME_PD_PRODUCT_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{pd product}", DEFAULT },
 #define RUNTIME_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{diagnostic}", DEFAULT },
 #define RUNTIME_MANAGEABLE_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{manageable}", DEFAULT },
 #define RUNTIME_PRODUCT_RW_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{product rw}", DEFAULT },
 #ifdef PRODUCT
   #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
   #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     /* flag is constant */
   #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
 #else
   #define RUNTIME_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "", DEFAULT },
   #define RUNTIME_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{pd}", DEFAULT },
   #define RUNTIME_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{notproduct}", DEFAULT },
 #endif
 #define C1_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 product}", DEFAULT },
 #define C1_PD_PRODUCT_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{C1 pd product}", DEFAULT },
 #ifdef PRODUCT
   #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
   #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     /* flag is constant */
   #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
 #else
   #define C1_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1}", DEFAULT },
   #define C1_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{C1 pd}", DEFAULT },
   #define C1_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C1 notproduct}", DEFAULT },
 #endif
 #define C2_PRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 product}", DEFAULT },
 #define C2_PD_PRODUCT_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{C2 pd product}", DEFAULT },
 #define C2_DIAGNOSTIC_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 diagnostic}", DEFAULT },
 #ifdef PRODUCT
   #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) /* flag is constant */
   #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     /* flag is constant */
   #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc)
 #else
   #define C2_DEVELOP_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2}", DEFAULT },
   #define C2_PD_DEVELOP_FLAG_STRUCT(type, name, doc)     { #type, XSTR(name), &name, "{C2 pd}", DEFAULT },
   #define C2_NOTPRODUCT_FLAG_STRUCT(type, name, value, doc) { #type, XSTR(name), &name, "{C2 notproduct}", DEFAULT },
 #endif
 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_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_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)
 #ifdef COMPILER1
  C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_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_NOTPRODUCT_FLAG_STRUCT)
 #endif
  {0, NULL, NULL}
 };
 Flag* Flag::flags = flagTable;
 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
 inline bool str_equal(const char* s, 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;
 }
 Flag* Flag::find_flag(char* name, size_t length) {
   for (Flag* current = &flagTable[0]; current->name; current++) {
     if (str_equal(current->name, name, length)) {
       if (!(current->is_unlocked() || current->is_unlocker())) {
         // disable use of diagnostic flags until they are unlocked
         return NULL;
       }
       return current;
     }
   }
   return NULL;
 }
 // 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->origin == 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->origin == 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->origin == 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->origin == 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, FlagValueOrigin 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->origin = origin;
   return true;
 }
 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, FlagValueOrigin origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
   faddr->set_bool(value);
   faddr->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, FlagValueOrigin 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->origin = origin;
   return true;
 }
 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, FlagValueOrigin origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
   faddr->set_intx(value);
   faddr->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, FlagValueOrigin 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->origin = origin;
   return true;
 }
 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, FlagValueOrigin origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
   faddr->set_uintx(value);
   faddr->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, FlagValueOrigin 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->origin = origin;
   return true;
 }
 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, FlagValueOrigin origin) {
   Flag* faddr = address_of_flag(flag);
   guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
   faddr->set_double(value);
   faddr->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, FlagValueOrigin 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 = NEW_C_HEAP_ARRAY(char, strlen(*value)+1);
   strcpy(new_value, *value);
   result->set_ccstr(new_value);
   if (result->origin == 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);
     strcpy(old_value_to_free, old_value);
     old_value = old_value_to_free;
   }
   *value = old_value;
   result->origin = origin;
   return true;
 }
 // Contract:  Flag will make private copy of the incoming value.
 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, FlagValueOrigin 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);
   strcpy(new_value, value);
   faddr->set_ccstr(new_value);
   if (faddr->origin != DEFAULT && old_value != NULL) {
     // Prior value is heap allocated so free it.
     FREE_C_HEAP_ARRAY(char, old_value);
   }
   faddr->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() {
   // 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.
   // Compute size
   int length= 0;
   while (flagTable[length].name != NULL) length++;
   // Sort
   Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
   for (int index = 0; index < length; index++) {
     array[index] = &flagTable[index];
   }
   qsort(array, length, sizeof(Flag*), compare_flags);
   // Print
   for (int i = 0; i < length; i++) {
     if (array[i]->origin /* naked field! */) {
       array[i]->print_as_flag(tty);
       tty->print(" ");
     }
   }
   tty->cr();
   FREE_C_HEAP_ARRAY(Flag*, array);
 }
 #ifndef PRODUCT
 void CommandLineFlags::verify() {
   assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
 }
 void CommandLineFlags::printFlags() {
   // 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.
   // Compute size
   int length= 0;
   while (flagTable[length].name != NULL) length++;
   // Sort
   Flag** array = NEW_C_HEAP_ARRAY(Flag*, length);
   for (int index = 0; index < length; index++) {
     array[index] = &flagTable[index];
   }
   qsort(array, length, sizeof(Flag*), compare_flags);
   // Print
   tty->print_cr("[Global flags]");
   for (int i = 0; i < length; i++) {
     if (array[i]->is_unlocked()) {
       array[i]->print_on(tty);
     }
   }
   FREE_C_HEAP_ARRAY(Flag*, array);
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/globals.cpp@38a50dd839cf (annotated)

src/share/vm/runtime/globals.cpp