| changeset 5702 | 201c5cde25bb |
| parent 5547 | f4b087cbb361 |
| parent 5688 | 9052dc91ea67 |
| child 5882 | 6b2aecc4f7d8 |
| 5685:0e4c848d5c06 | 5702:201c5cde25bb |
|---|---|
1 /* |
1 /* |
2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
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 |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
24 |
24 |
25 // Base class for different kinds of abstractions working |
25 // Base class for different kinds of abstractions working |
26 // relative to an objects 'this' pointer. |
26 // relative to an objects 'this' pointer. |
27 |
27 |
28 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { |
28 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { |
29 private: |
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30 int sign_extend (int x, int size) const { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; } |
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31 |
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32 public: |
29 public: |
33 // Address computation |
30 // Address computation |
34 address addr_at (int offset) const { return (address)this + offset; } |
31 address addr_at (int offset) const { return (address)this + offset; } |
32 int byte_at (int offset) const { return *(addr_at(offset)); } |
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35 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } |
33 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } |
36 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } |
34 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } |
37 |
35 |
38 // Java unsigned accessors (using Java spec byte ordering) |
36 // Word access: |
39 int java_byte_at (int offset) const { return *(jubyte*)addr_at(offset); } |
37 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); } |
40 int java_hwrd_at (int offset) const { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); } |
38 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); } |
41 int java_word_at (int offset) const { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); } |
39 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); } |
42 |
40 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); } |
43 // Java signed accessors (using Java spec byte ordering) |
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44 int java_signed_byte_at(int offset) const { return sign_extend(java_byte_at(offset), 1); } |
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45 int java_signed_hwrd_at(int offset) const { return sign_extend(java_hwrd_at(offset), 2); } |
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46 int java_signed_word_at(int offset) const { return java_word_at(offset) ; } |
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47 |
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48 // Fast accessors (using the machine's natural byte ordering) |
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49 int fast_byte_at (int offset) const { return *(jubyte *)addr_at(offset); } |
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50 int fast_hwrd_at (int offset) const { return *(jushort*)addr_at(offset); } |
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51 int fast_word_at (int offset) const { return *(juint *)addr_at(offset); } |
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52 |
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53 // Fast signed accessors (using the machine's natural byte ordering) |
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54 int fast_signed_byte_at(int offset) const { return *(jbyte *)addr_at(offset); } |
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55 int fast_signed_hwrd_at(int offset) const { return *(jshort*)addr_at(offset); } |
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56 int fast_signed_word_at(int offset) const { return *(jint *)addr_at(offset); } |
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57 |
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58 // Fast manipulators (using the machine's natural byte ordering) |
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59 void set_fast_byte_at (int offset, int x) const { *(jbyte *)addr_at(offset) = (jbyte )x; } |
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60 void set_fast_hwrd_at (int offset, int x) const { *(jshort*)addr_at(offset) = (jshort)x; } |
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61 void set_fast_word_at (int offset, int x) const { *(jint *)addr_at(offset) = (jint )x; } |
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62 }; |
41 }; |
63 |
42 |
64 |
43 |
65 // The base class for different kinds of bytecode abstractions. |
44 // The base class for different kinds of bytecode abstractions. |
66 // Provides the primitive operations to manipulate code relative |
45 // Provides the primitive operations to manipulate code relative |
67 // to an objects 'this' pointer. |
46 // to an objects 'this' pointer. |
47 // FIXME: Make this a ResourceObj, include the enclosing methodOop, and cache the opcode. |
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68 |
48 |
69 class Bytecode: public ThisRelativeObj { |
49 class Bytecode: public ThisRelativeObj { |
70 protected: |
50 protected: |
71 u_char byte_at(int offset) const { return *addr_at(offset); } |
51 u_char byte_at(int offset) const { return *addr_at(offset); } |
72 bool check_must_rewrite() const; |
52 bool check_must_rewrite(Bytecodes::Code bc) const; |
73 |
53 |
74 public: |
54 public: |
75 // Attributes |
55 // Attributes |
76 address bcp() const { return addr_at(0); } |
56 address bcp() const { return addr_at(0); } |
77 address next_bcp() const { return addr_at(0) + Bytecodes::length_at(bcp()); } |
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78 int instruction_size() const { return Bytecodes::length_at(bcp()); } |
57 int instruction_size() const { return Bytecodes::length_at(bcp()); } |
79 |
58 |
59 // Warning: Use code() with caution on live bytecode streams. 4926272 |
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80 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } |
60 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } |
81 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } |
61 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } |
82 bool must_rewrite() const { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); } |
62 bool must_rewrite(Bytecodes::Code code) const { return Bytecodes::can_rewrite(code) && check_must_rewrite(code); } |
83 bool is_active_breakpoint() const { return Bytecodes::is_active_breakpoint_at(bcp()); } |
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84 |
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85 int one_byte_index() const { assert_index_size(1); return byte_at(1); } |
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86 int two_byte_index() const { assert_index_size(2); return (byte_at(1) << 8) + byte_at(2); } |
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87 |
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88 int offset() const { return (two_byte_index() << 16) >> 16; } |
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89 address destination() const { return bcp() + offset(); } |
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90 |
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91 // Attribute modification |
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92 void set_code(Bytecodes::Code code); |
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93 |
63 |
94 // Creation |
64 // Creation |
95 inline friend Bytecode* Bytecode_at(address bcp); |
65 inline friend Bytecode* Bytecode_at(address bcp); |
96 |
66 |
97 private: |
67 // Static functions for parsing bytecodes in place. |
98 void assert_index_size(int required_size) const { |
68 int get_index_u1(Bytecodes::Code bc) const { |
99 #ifdef ASSERT |
69 assert_same_format_as(bc); assert_index_size(1, bc); |
100 int isize = instruction_size() - 1; |
70 return *(jubyte*)addr_at(1); |
101 if (isize == 2 && code() == Bytecodes::_iinc) |
71 } |
102 isize = 1; |
72 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const { |
103 else if (isize <= 2) |
73 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide); |
104 ; // no change |
74 address p = addr_at(is_wide ? 2 : 1); |
105 else if (code() == Bytecodes::_invokedynamic) |
75 if (can_use_native_byte_order(bc, is_wide)) |
106 isize = 4; |
76 return Bytes::get_native_u2(p); |
107 else |
77 else return Bytes::get_Java_u2(p); |
108 isize = 2; |
78 } |
109 assert(isize = required_size, "wrong index size"); |
79 int get_index_u2_cpcache(Bytecodes::Code bc) const { |
110 #endif |
80 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc); |
81 return Bytes::get_native_u2(addr_at(1)) DEBUG_ONLY(+ constantPoolOopDesc::CPCACHE_INDEX_TAG); |
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82 } |
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83 int get_index_u4(Bytecodes::Code bc) const { |
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84 assert_same_format_as(bc); assert_index_size(4, bc); |
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85 assert(can_use_native_byte_order(bc), ""); |
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86 return Bytes::get_native_u4(addr_at(1)); |
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87 } |
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88 bool has_index_u4(Bytecodes::Code bc) const { |
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89 return bc == Bytecodes::_invokedynamic; |
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90 } |
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91 |
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92 int get_offset_s2(Bytecodes::Code bc) const { |
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93 assert_same_format_as(bc); assert_offset_size(2, bc); |
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94 return (jshort) Bytes::get_Java_u2(addr_at(1)); |
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95 } |
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96 int get_offset_s4(Bytecodes::Code bc) const { |
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97 assert_same_format_as(bc); assert_offset_size(4, bc); |
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98 return (jint) Bytes::get_Java_u4(addr_at(1)); |
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99 } |
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100 |
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101 int get_constant_u1(int offset, Bytecodes::Code bc) const { |
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102 assert_same_format_as(bc); assert_constant_size(1, offset, bc); |
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103 return *(jbyte*)addr_at(offset); |
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104 } |
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105 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const { |
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106 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide); |
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107 return (jshort) Bytes::get_Java_u2(addr_at(offset)); |
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108 } |
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109 |
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110 // These are used locally and also from bytecode streams. |
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111 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN; |
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112 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; |
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113 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; |
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114 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; |
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115 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; |
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116 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) { |
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117 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/)); |
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111 } |
118 } |
112 }; |
119 }; |
113 |
120 |
114 inline Bytecode* Bytecode_at(address bcp) { |
121 inline Bytecode* Bytecode_at(address bcp) { |
122 // Warning: Use with caution on live bytecode streams. 4926272 |
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115 return (Bytecode*)bcp; |
123 return (Bytecode*)bcp; |
116 } |
124 } |
117 |
125 |
118 |
126 |
119 // Abstractions for lookupswitch bytecode |
127 // Abstractions for lookupswitch bytecode |
122 private: |
130 private: |
123 int _match; |
131 int _match; |
124 int _offset; |
132 int _offset; |
125 |
133 |
126 public: |
134 public: |
127 int match() const { return java_signed_word_at(0 * jintSize); } |
135 int match() const { return get_Java_u4_at(0 * jintSize); } |
128 int offset() const { return java_signed_word_at(1 * jintSize); } |
136 int offset() const { return get_Java_u4_at(1 * jintSize); } |
129 }; |
137 }; |
130 |
138 |
131 |
139 |
132 class Bytecode_lookupswitch: public Bytecode { |
140 class Bytecode_lookupswitch: public Bytecode { |
133 public: |
141 public: |
134 void verify() const PRODUCT_RETURN; |
142 void verify() const PRODUCT_RETURN; |
135 |
143 |
136 // Attributes |
144 // Attributes |
137 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } |
145 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
138 int number_of_pairs() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } |
146 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } |
139 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); |
147 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); |
140 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } |
148 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } |
141 // Creation |
149 // Creation |
142 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); |
150 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); |
143 }; |
151 }; |
152 class Bytecode_tableswitch: public Bytecode { |
160 class Bytecode_tableswitch: public Bytecode { |
153 public: |
161 public: |
154 void verify() const PRODUCT_RETURN; |
162 void verify() const PRODUCT_RETURN; |
155 |
163 |
156 // Attributes |
164 // Attributes |
157 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } |
165 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
158 int low_key() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } |
166 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } |
159 int high_key() const { return java_signed_word_at(aligned_offset(1 + 2*jintSize)); } |
167 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); } |
160 int dest_offset_at(int i) const; |
168 int dest_offset_at(int i) const; |
161 int length() { return high_key()-low_key()+1; } |
169 int length() { return high_key()-low_key()+1; } |
162 |
170 |
163 // Creation |
171 // Creation |
164 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); |
172 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); |
204 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } |
212 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } |
205 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } |
213 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } |
206 bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } |
214 bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } |
207 |
215 |
208 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } |
216 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } |
209 bool has_giant_index() const { return is_invokedynamic(); } |
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210 |
217 |
211 bool is_valid() const { return is_invokeinterface() || |
218 bool is_valid() const { return is_invokeinterface() || |
212 is_invokevirtual() || |
219 is_invokevirtual() || |
213 is_invokestatic() || |
220 is_invokestatic() || |
214 is_invokespecial() || |
221 is_invokespecial() || |
250 debug_only(b->verify()); |
257 debug_only(b->verify()); |
251 return b; |
258 return b; |
252 } |
259 } |
253 |
260 |
254 |
261 |
255 // Abstraction for {get,put}static |
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256 |
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257 class Bytecode_static: public Bytecode { |
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258 public: |
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259 void verify() const; |
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260 |
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261 // Returns the result type of the send by inspecting the field ref |
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262 BasicType result_type(methodOop method) const; |
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263 |
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264 // Creation |
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265 inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp); |
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266 }; |
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267 |
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268 inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) { |
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269 Bytecode_static* b = (Bytecode_static*)bcp; |
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270 debug_only(b->verify()); |
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271 return b; |
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272 } |
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273 |
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274 |
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275 // Abstraction for checkcast |
262 // Abstraction for checkcast |
276 |
263 |
277 class Bytecode_checkcast: public Bytecode { |
264 class Bytecode_checkcast: public Bytecode { |
278 public: |
265 public: |
279 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } |
266 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } |
280 |
267 |
281 // Returns index |
268 // Returns index |
282 long index() const { return java_hwrd_at(1); }; |
269 long index() const { return get_index_u2(Bytecodes::_checkcast); }; |
283 |
270 |
284 // Creation |
271 // Creation |
285 inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); |
272 inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); |
286 }; |
273 }; |
287 |
274 |
297 class Bytecode_instanceof: public Bytecode { |
284 class Bytecode_instanceof: public Bytecode { |
298 public: |
285 public: |
299 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } |
286 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } |
300 |
287 |
301 // Returns index |
288 // Returns index |
302 long index() const { return java_hwrd_at(1); }; |
289 long index() const { return get_index_u2(Bytecodes::_instanceof); }; |
303 |
290 |
304 // Creation |
291 // Creation |
305 inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); |
292 inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); |
306 }; |
293 }; |
307 |
294 |
315 class Bytecode_new: public Bytecode { |
302 class Bytecode_new: public Bytecode { |
316 public: |
303 public: |
317 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } |
304 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } |
318 |
305 |
319 // Returns index |
306 // Returns index |
320 long index() const { return java_hwrd_at(1); }; |
307 long index() const { return get_index_u2(Bytecodes::_new); }; |
321 |
308 |
322 // Creation |
309 // Creation |
323 inline friend Bytecode_new* Bytecode_new_at(address bcp); |
310 inline friend Bytecode_new* Bytecode_new_at(address bcp); |
324 }; |
311 }; |
325 |
312 |
333 class Bytecode_multianewarray: public Bytecode { |
320 class Bytecode_multianewarray: public Bytecode { |
334 public: |
321 public: |
335 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } |
322 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } |
336 |
323 |
337 // Returns index |
324 // Returns index |
338 long index() const { return java_hwrd_at(1); }; |
325 long index() const { return get_index_u2(Bytecodes::_multianewarray); }; |
339 |
326 |
340 // Creation |
327 // Creation |
341 inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); |
328 inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); |
342 }; |
329 }; |
343 |
330 |
351 class Bytecode_anewarray: public Bytecode { |
338 class Bytecode_anewarray: public Bytecode { |
352 public: |
339 public: |
353 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } |
340 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } |
354 |
341 |
355 // Returns index |
342 // Returns index |
356 long index() const { return java_hwrd_at(1); }; |
343 long index() const { return get_index_u2(Bytecodes::_anewarray); }; |
357 |
344 |
358 // Creation |
345 // Creation |
359 inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); |
346 inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); |
360 }; |
347 }; |
361 |
348 |