Mercurial > hg > truffle
annotate src/share/vm/utilities/constantTag.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | 083fde3b838e |
| children | 3b2dea75431e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // constant tags in Java .class files | |
| 26 | |
| 27 | |
| 28 enum { | |
| 29 // See jvm.h for shared JVM_CONSTANT_XXX tags | |
| 30 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java | |
| 31 // Hotspot specific tags | |
| 32 JVM_CONSTANT_Invalid = 0, // For bad value initialization | |
| 33 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course) | |
| 34 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use | |
| 35 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool | |
| 36 JVM_CONSTANT_UnresolvedString = 102, // Temporary tag until actual use | |
| 37 JVM_CONSTANT_StringIndex = 103, // Temporary tag while constructing constant pool | |
| 38 JVM_CONSTANT_UnresolvedClassInError = 104, // Error tag due to resolution error | |
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39 JVM_CONSTANT_Object = 105, // Required for BoundMethodHandle arguments. |
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40 JVM_CONSTANT_InternalMax = 105 // Last implementation tag |
| 0 | 41 }; |
| 42 | |
| 43 | |
| 44 class constantTag VALUE_OBJ_CLASS_SPEC { | |
| 45 private: | |
| 46 jbyte _tag; | |
| 47 public: | |
| 48 bool is_klass() const { return _tag == JVM_CONSTANT_Class; } | |
| 49 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; } | |
| 50 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; } | |
| 51 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; } | |
| 52 bool is_string() const { return _tag == JVM_CONSTANT_String; } | |
| 53 bool is_int() const { return _tag == JVM_CONSTANT_Integer; } | |
| 54 bool is_float() const { return _tag == JVM_CONSTANT_Float; } | |
| 55 bool is_long() const { return _tag == JVM_CONSTANT_Long; } | |
| 56 bool is_double() const { return _tag == JVM_CONSTANT_Double; } | |
| 57 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; } | |
| 58 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; } | |
| 59 | |
| 60 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; } | |
| 61 | |
| 62 bool is_unresolved_klass() const { | |
| 63 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError; | |
| 64 } | |
| 65 | |
| 66 bool is_unresolved_klass_in_error() const { | |
| 67 return _tag == JVM_CONSTANT_UnresolvedClassInError; | |
| 68 } | |
| 69 | |
| 70 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; } | |
| 71 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; } | |
| 72 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; } | |
| 73 | |
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74 bool is_object() const { return _tag == JVM_CONSTANT_Object; } |
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75 |
| 0 | 76 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); } |
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77 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); } |
| 0 | 78 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); } |
| 79 bool is_symbol() const { return is_utf8(); } | |
| 80 | |
| 1602 | 81 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; } |
| 82 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; } | |
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83 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; } |
| 1602 | 84 |
| 85 constantTag() { | |
| 86 _tag = JVM_CONSTANT_Invalid; | |
| 87 } | |
| 0 | 88 constantTag(jbyte tag) { |
| 89 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) || | |
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90 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) || |
| 0 | 91 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag"); |
| 92 _tag = tag; | |
| 93 } | |
| 94 | |
| 95 jbyte value() { return _tag; } | |
| 96 | |
| 1602 | 97 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed? |
| 98 | |
| 99 const char* internal_name() const; // for error reporting | |
| 100 | |
| 0 | 101 void print_on(outputStream* st) const PRODUCT_RETURN; |
| 102 }; |