Mercurial > hg > truffle
annotate src/share/vm/runtime/stackValueCollection.cpp @ 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 |
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date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_stackValueCollection.cpp.incl" | |
27 | |
28 jint StackValueCollection::int_at(int slot) const { | |
29 intptr_t val = at(slot)->get_int(); | |
30 jint ival = *((jint*) (&val)); | |
31 return ival; | |
32 } | |
33 | |
34 jlong StackValueCollection::long_at(int slot) const { | |
35 #ifdef _LP64 | |
36 return at(slot+1)->get_int(); | |
37 #else | |
38 union { | |
39 jlong jl; | |
40 jint array[2]; | |
41 } value; | |
42 // Interpreter stack is reversed in memory: | |
43 // low memory location is in higher java local slot. | |
44 value.array[0] = at(slot+1)->get_int(); | |
45 value.array[1] = at(slot )->get_int(); | |
46 return value.jl; | |
47 #endif | |
48 } | |
49 | |
50 Handle StackValueCollection::obj_at(int slot) const { | |
51 return at(slot)->get_obj(); | |
52 } | |
53 | |
54 jfloat StackValueCollection::float_at(int slot) const { | |
55 intptr_t res = at(slot)->get_int(); | |
56 return *((jfloat*) (&res)); | |
57 } | |
58 | |
59 jdouble StackValueCollection::double_at(int slot) const { | |
60 #ifdef _LP64 | |
61 intptr_t res = at(slot+1)->get_int(); | |
62 return *((jdouble*) (&res)); | |
63 #else | |
64 union { | |
65 jdouble jd; | |
66 jint array[2]; | |
67 } value; | |
68 // Interpreter stack is reversed in memory: | |
69 // low memory location is in higher java local slot. | |
70 value.array[0] = at(slot+1)->get_int(); | |
71 value.array[1] = at(slot )->get_int(); | |
72 return value.jd; | |
73 #endif | |
74 } | |
75 | |
76 void StackValueCollection::set_int_at(int slot, jint value) { | |
77 intptr_t val; | |
78 *((jint*) (&val)) = value; | |
79 at(slot)->set_int(val); | |
80 } | |
81 | |
82 void StackValueCollection::set_long_at(int slot, jlong value) { | |
83 #ifdef _LP64 | |
84 at(slot+1)->set_int(value); | |
85 #else | |
86 union { | |
87 jlong jl; | |
88 jint array[2]; | |
89 } x; | |
90 // Interpreter stack is reversed in memory: | |
91 // low memory location is in higher java local slot. | |
92 x.jl = value; | |
93 at(slot+1)->set_int(x.array[0]); | |
94 at(slot+0)->set_int(x.array[1]); | |
95 #endif | |
96 } | |
97 | |
98 void StackValueCollection::set_obj_at(int slot, Handle value) { | |
99 at(slot)->set_obj(value); | |
100 } | |
101 | |
102 void StackValueCollection::set_float_at(int slot, jfloat value) { | |
103 #ifdef _LP64 | |
104 union { | |
105 intptr_t jd; | |
106 jint array[2]; | |
107 } val; | |
108 // Interpreter stores 32 bit floats in first half of 64 bit word. | |
109 val.array[0] = *(jint*)(&value); | |
110 val.array[1] = 0; | |
111 at(slot)->set_int(val.jd); | |
112 #else | |
113 at(slot)->set_int(*(jint*)(&value)); | |
114 #endif | |
115 } | |
116 | |
117 void StackValueCollection::set_double_at(int slot, jdouble value) { | |
118 #ifdef _LP64 | |
119 at(slot+1)->set_int(*(intptr_t*)(&value)); | |
120 #else | |
121 union { | |
122 jdouble jd; | |
123 jint array[2]; | |
124 } x; | |
125 // Interpreter stack is reversed in memory: | |
126 // low memory location is in higher java local slot. | |
127 x.jd = value; | |
128 at(slot+1)->set_int(x.array[0]); | |
129 at(slot+0)->set_int(x.array[1]); | |
130 #endif | |
131 } | |
132 | |
133 #ifndef PRODUCT | |
134 void StackValueCollection::print() { | |
135 for(int index = 0; index < size(); index++) { | |
136 tty->print("\t %2d ", index); | |
137 at(index)->print_on(tty); | |
138 if( at(index )->type() == T_INT && | |
139 index+1 < size() && | |
140 at(index+1)->type() == T_INT ) { | |
141 tty->print(" " INT64_FORMAT " (long)", long_at(index)); | |
142 tty->cr(); | |
143 tty->print("\t %.15e (double)", double_at(index)); | |
144 tty->print(" " PTR64_FORMAT " (longhex)", long_at(index)); | |
145 } | |
146 tty->cr(); | |
147 } | |
148 } | |
149 #endif |