Bug Summary

File:jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp
Warning:line 782, column 5
Value stored to 'count' is never read

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name relocator.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mthread-model posix -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/libjvm/objs/precompiled -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D _GNU_SOURCE -D _REENTRANT -D LIBC=gnu -D LINUX -D VM_LITTLE_ENDIAN -D _LP64=1 -D ASSERT -D CHECK_UNHANDLED_OOPS -D TARGET_ARCH_x86 -D INCLUDE_SUFFIX_OS=_linux -D INCLUDE_SUFFIX_CPU=_x86 -D INCLUDE_SUFFIX_COMPILER=_gcc -D TARGET_COMPILER_gcc -D AMD64 -D HOTSPOT_LIB_ARCH="amd64" -D COMPILER1 -D COMPILER2 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -I /home/daniel/Projects/java/jdk/src/hotspot/share/precompiled -I /home/daniel/Projects/java/jdk/src/hotspot/share/include -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix/include -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/support/modules_include/java.base/linux -I /home/daniel/Projects/java/jdk/src/java.base/share/native/libjimage -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc/adfiles -I /home/daniel/Projects/java/jdk/src/hotspot/share -I /home/daniel/Projects/java/jdk/src/hotspot/os/linux -I /home/daniel/Projects/java/jdk/src/hotspot/os/posix -I /home/daniel/Projects/java/jdk/src/hotspot/cpu/x86 -I /home/daniel/Projects/java/jdk/src/hotspot/os_cpu/linux_x86 -I /home/daniel/Projects/java/jdk/build/linux-x86_64-server-fastdebug/hotspot/variant-server/gensrc -D _FORTIFY_SOURCE=2 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/x86_64-linux-gnu/c++/7.5.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-format-zero-length -Wno-unused-parameter -Wno-unused -Wno-parentheses -Wno-comment -Wno-unknown-pragmas -Wno-address -Wno-delete-non-virtual-dtor -Wno-char-subscripts -Wno-array-bounds -Wno-int-in-bool-context -Wno-ignored-qualifiers -Wno-missing-field-initializers -Wno-implicit-fallthrough -Wno-empty-body -Wno-strict-overflow -Wno-sequence-point -Wno-maybe-uninitialized -Wno-misleading-indentation -Wno-cast-function-type -Wno-shift-negative-value -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /home/daniel/Projects/java/jdk/make/hotspot -ferror-limit 19 -fmessage-length 0 -fvisibility hidden -stack-protector 1 -fno-rtti -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -o /home/daniel/Projects/java/scan/2021-12-21-193737-8510-1 -x c++ /home/daniel/Projects/java/jdk/src/hotspot/share/runtime/relocator.cpp
1/*
2 * Copyright (c) 2010, 2021, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_CLASSFILE_STACKMAPTABLEFORMAT_HPP
26#define SHARE_CLASSFILE_STACKMAPTABLEFORMAT_HPP
27
28#include "classfile/verificationType.hpp"
29
30// These classes represent the stack-map substructures described in the JVMS
31// (hence the non-conforming naming scheme).
32
33// These classes work with the types in their compressed form in-place (as they
34// would appear in the classfile). No virtual methods or fields allowed.
35
36class verification_type_info {
37 private:
38 // u1 tag
39 // u2 cpool_index || u2 bci (for ITEM_Object & ITEM_Uninitailized only)
40
41 address tag_addr() const { return (address)this; }
42 address cpool_index_addr() const { return tag_addr() + sizeof(u1); }
43 address bci_addr() const { return cpool_index_addr(); }
44 NONCOPYABLE(verification_type_info)verification_type_info(verification_type_info const&) = delete
; verification_type_info& operator=(verification_type_info
const&) = delete;
45
46 protected:
47 // No constructors - should be 'private', but GCC issues a warning if it is
48 verification_type_info() {}
49
50 public:
51
52 static verification_type_info* at(address addr) {
53 return (verification_type_info*)addr;
54 }
55
56 static verification_type_info* create_at(address addr, u1 tag) {
57 verification_type_info* vti = (verification_type_info*)addr;
58 vti->set_tag(tag);
59 return vti;
60 }
61
62 static verification_type_info* create_object_at(address addr, u2 cp_idx) {
63 verification_type_info* vti = (verification_type_info*)addr;
64 vti->set_tag(ITEM_Object);
65 vti->set_cpool_index(cp_idx);
66 return vti;
67 }
68
69 static verification_type_info* create_uninit_at(address addr, u2 bci) {
70 verification_type_info* vti = (verification_type_info*)addr;
71 vti->set_tag(ITEM_Uninitialized);
72 vti->set_bci(bci);
73 return vti;
74 }
75
76 static size_t calculate_size(u1 tag) {
77 if (tag == ITEM_Object || tag == ITEM_Uninitialized) {
78 return sizeof(u1) + sizeof(u2);
79 } else {
80 return sizeof(u1);
81 }
82 }
83
84 static size_t max_size() { return sizeof(u1) + sizeof(u2); }
85
86 u1 tag() const { return *(u1*)tag_addr(); }
87 void set_tag(u1 tag) { *((u1*)tag_addr()) = tag; }
88
89 bool is_object() const { return tag() == ITEM_Object; }
90 bool is_uninitialized() const { return tag() == ITEM_Uninitialized; }
91
92 u2 cpool_index() const {
93 assert(is_object(), "This type has no cp_index")do { if (!(is_object())) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 93, "assert(" "is_object()" ") failed", "This type has no cp_index"
); ::breakpoint(); } } while (0);
94 return Bytes::get_Java_u2(cpool_index_addr());
95 }
96 void set_cpool_index(u2 idx) {
97 assert(is_object(), "This type has no cp_index")do { if (!(is_object())) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 97, "assert(" "is_object()" ") failed", "This type has no cp_index"
); ::breakpoint(); } } while (0);
98 Bytes::put_Java_u2(cpool_index_addr(), idx);
99 }
100
101 u2 bci() const {
102 assert(is_uninitialized(), "This type has no bci")do { if (!(is_uninitialized())) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 102, "assert(" "is_uninitialized()" ") failed", "This type has no bci"
); ::breakpoint(); } } while (0);
103 return Bytes::get_Java_u2(bci_addr());
104 }
105
106 void set_bci(u2 bci) {
107 assert(is_uninitialized(), "This type has no bci")do { if (!(is_uninitialized())) { (*g_assert_poison) = 'X';; report_vm_error
("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 107, "assert(" "is_uninitialized()" ") failed", "This type has no bci"
); ::breakpoint(); } } while (0);
108 Bytes::put_Java_u2(bci_addr(), bci);
109 }
110
111 void copy_from(verification_type_info* from) {
112 set_tag(from->tag());
113 if (from->is_object()) {
114 set_cpool_index(from->cpool_index());
115 } else if (from->is_uninitialized()) {
116 set_bci(from->bci());
117 }
118 }
119
120 size_t size() const {
121 return calculate_size(tag());
122 }
123
124 verification_type_info* next() {
125 return (verification_type_info*)((address)this + size());
126 }
127
128 // This method is used when reading unverified data in order to ensure
129 // that we don't read past a particular memory limit. It returns false
130 // if any part of the data structure is outside the specified memory bounds.
131 bool verify(address start, address end) {
132 return ((address)this >= start &&
133 (address)this < end &&
134 (bci_addr() + sizeof(u2) <= end ||
135 (!is_object() && !is_uninitialized())));
136 }
137
138 void print_on(outputStream* st) {
139 switch (tag()) {
140 case ITEM_Top: st->print("Top"); break;
141 case ITEM_Integer: st->print("Integer"); break;
142 case ITEM_Float: st->print("Float"); break;
143 case ITEM_Double: st->print("Double"); break;
144 case ITEM_Long: st->print("Long"); break;
145 case ITEM_Null: st->print("Null"); break;
146 case ITEM_UninitializedThis:
147 st->print("UninitializedThis"); break;
148 case ITEM_Uninitialized:
149 st->print("Uninitialized[#%d]", bci()); break;
150 case ITEM_Object:
151 st->print("Object[#%d]", cpool_index()); break;
152 default:
153 st->print("BAD:%d", tag()); break;
154 }
155 }
156};
157
158#define FOR_EACH_STACKMAP_FRAME_TYPE(macro, arg1, arg2) \
159 macro(same_frame, arg1, arg2) \
160 macro(same_frame_extended, arg1, arg2) \
161 macro(same_locals_1_stack_item_frame, arg1, arg2) \
162 macro(same_locals_1_stack_item_extended, arg1, arg2) \
163 macro(chop_frame, arg1, arg2) \
164 macro(append_frame, arg1, arg2) \
165 macro(full_frame, arg1, arg2)
166
167#define SM_FORWARD_DECL(type, arg1, arg2) class type;
168FOR_EACH_STACKMAP_FRAME_TYPE(SM_FORWARD_DECL, x, x)
169#undef SM_FORWARD_DECL
170
171class stack_map_frame {
172 NONCOPYABLE(stack_map_frame)stack_map_frame(stack_map_frame const&) = delete; stack_map_frame
& operator=(stack_map_frame const&) = delete;
173
174 protected:
175 address frame_type_addr() const { return (address)this; }
176
177 // No constructors - should be 'private', but GCC issues a warning if it is
178 stack_map_frame() {}
179
180 public:
181
182 static stack_map_frame* at(address addr) {
183 return (stack_map_frame*)addr;
184 }
185
186 stack_map_frame* next() const {
187 return at((address)this + size());
188 }
189
190 u1 frame_type() const { return *(u1*)frame_type_addr(); }
191 void set_frame_type(u1 type) { *((u1*)frame_type_addr()) = type; }
192
193 // pseudo-virtual methods
194 inline size_t size() const;
195 inline int offset_delta() const;
196 inline void set_offset_delta(int offset_delta);
197 inline int number_of_types() const; // number of types contained in the frame
198 inline verification_type_info* types() const; // pointer to first type
199 inline bool is_valid_offset(int offset_delta) const;
200
201 // This method must be used when reading unverified data in order to ensure
202 // that we don't read past a particular memory limit. It returns false
203 // if any part of the data structure is outside the specified memory bounds.
204 inline bool verify(address start, address end) const;
205
206 inline void print_on(outputStream* st, int current_offset) const;
207 inline void print_truncated(outputStream* st, int current_offset) const;
208
209 // Create as_xxx and is_xxx methods for the subtypes
210#define FRAME_TYPE_DECL(stackmap_frame_type, arg1, arg2) \
211 inline stackmap_frame_type* as_##stackmap_frame_type() const; \
212 bool is_##stackmap_frame_type() { \
213 return as_##stackmap_frame_type() != NULL__null; \
214 }
215
216 FOR_EACH_STACKMAP_FRAME_TYPE(FRAME_TYPE_DECL, x, x)
217#undef FRAME_TYPE_DECL
218};
219
220class same_frame : public stack_map_frame {
221 private:
222 static int frame_type_to_offset_delta(u1 frame_type) {
223 return frame_type + 1; }
224 static u1 offset_delta_to_frame_type(int offset_delta) {
225 return (u1)(offset_delta - 1); }
226
227 public:
228
229 static bool is_frame_type(u1 tag) {
230 return tag < 64;
231 }
232
233 static same_frame* at(address addr) {
234 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 234, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
235 return (same_frame*)addr;
236 }
237
238 static same_frame* create_at(address addr, int offset_delta) {
239 same_frame* sm = (same_frame*)addr;
240 sm->set_offset_delta(offset_delta);
241 return sm;
242 }
243
244 static size_t calculate_size() { return sizeof(u1); }
245
246 size_t size() const { return calculate_size(); }
247 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); }
248
249 void set_offset_delta(int offset_delta) {
250 assert(offset_delta <= 64, "Offset too large for same_frame")do { if (!(offset_delta <= 64)) { (*g_assert_poison) = 'X'
;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 250, "assert(" "offset_delta <= 64" ") failed", "Offset too large for same_frame"
); ::breakpoint(); } } while (0);
251 set_frame_type(offset_delta_to_frame_type(offset_delta));
252 }
253
254 int number_of_types() const { return 0; }
255 verification_type_info* types() const { return NULL__null; }
256
257 bool is_valid_offset(int offset_delta) const {
258 return is_frame_type(offset_delta_to_frame_type(offset_delta));
259 }
260
261 bool verify_subtype(address start, address end) const {
262 return true;
263 }
264
265 void print_on(outputStream* st, int current_offset = -1) const {
266 st->print("same_frame(@%d)", offset_delta() + current_offset);
267 }
268
269 void print_truncated(outputStream* st, int current_offset = -1) const {
270 print_on(st, current_offset);
271 }
272};
273
274class same_frame_extended : public stack_map_frame {
275 private:
276 enum { _frame_id = 251 };
277 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
278
279 public:
280 static bool is_frame_type(u1 tag) {
281 return tag == _frame_id;
282 }
283
284 static same_frame_extended* at(address addr) {
285 assert(is_frame_type(*addr), "Wrong frame type")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 285, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame type"
); ::breakpoint(); } } while (0);
286 return (same_frame_extended*)addr;
287 }
288
289 static same_frame_extended* create_at(address addr, u2 offset_delta) {
290 same_frame_extended* sm = (same_frame_extended*)addr;
291 sm->set_frame_type(_frame_id);
292 sm->set_offset_delta(offset_delta);
293 return sm;
294 }
295
296 static size_t calculate_size() { return sizeof(u1) + sizeof(u2); }
297
298 size_t size() const { return calculate_size(); }
299 int offset_delta() const {
300 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
301 }
302
303 void set_offset_delta(int offset_delta) {
304 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
305 }
306
307 int number_of_types() const { return 0; }
308 verification_type_info* types() const { return NULL__null; }
309 bool is_valid_offset(int offset) const { return true; }
310
311 bool verify_subtype(address start, address end) const {
312 return frame_type_addr() + size() <= end;
313 }
314
315 void print_on(outputStream* st, int current_offset = -1) const {
316 st->print("same_frame_extended(@%d)", offset_delta() + current_offset);
317 }
318
319 void print_truncated(outputStream* st, int current_offset = -1) const {
320 print_on(st, current_offset);
321 }
322};
323
324class same_locals_1_stack_item_frame : public stack_map_frame {
325 private:
326 address type_addr() const { return frame_type_addr() + sizeof(u1); }
327
328 static int frame_type_to_offset_delta(u1 frame_type) {
329 return frame_type - 63; }
330 static u1 offset_delta_to_frame_type(int offset_delta) {
331 return (u1)(offset_delta + 63); }
332
333 public:
334 static bool is_frame_type(u1 tag) {
335 return tag >= 64 && tag < 128;
336 }
337
338 static same_locals_1_stack_item_frame* at(address addr) {
339 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 339, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
340 return (same_locals_1_stack_item_frame*)addr;
341 }
342
343 static same_locals_1_stack_item_frame* create_at(
344 address addr, int offset_delta, verification_type_info* vti) {
345 same_locals_1_stack_item_frame* sm = (same_locals_1_stack_item_frame*)addr;
346 sm->set_offset_delta(offset_delta);
347 if (vti != NULL__null) {
348 sm->set_type(vti);
349 }
350 return sm;
351 }
352
353 static size_t calculate_size(verification_type_info* vti) {
354 return sizeof(u1) + vti->size();
355 }
356
357 static size_t max_size() {
358 return sizeof(u1) + verification_type_info::max_size();
359 }
360
361 size_t size() const { return calculate_size(types()); }
362 int offset_delta() const { return frame_type_to_offset_delta(frame_type()); }
363
364 void set_offset_delta(int offset_delta) {
365 assert(offset_delta > 0 && offset_delta <= 64,do { if (!(offset_delta > 0 && offset_delta <= 64
)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 366, "assert(" "offset_delta > 0 && offset_delta <= 64"
") failed", "Offset too large for this frame type"); ::breakpoint
(); } } while (0)
366 "Offset too large for this frame type")do { if (!(offset_delta > 0 && offset_delta <= 64
)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 366, "assert(" "offset_delta > 0 && offset_delta <= 64"
") failed", "Offset too large for this frame type"); ::breakpoint
(); } } while (0);
367 set_frame_type(offset_delta_to_frame_type(offset_delta));
368 }
369
370 void set_type(verification_type_info* vti) {
371 verification_type_info* cur = types();
372 cur->copy_from(vti);
373 }
374
375 int number_of_types() const { return 1; }
376 verification_type_info* types() const {
377 return verification_type_info::at(type_addr());
378 }
379
380 bool is_valid_offset(int offset_delta) const {
381 return is_frame_type(offset_delta_to_frame_type(offset_delta));
382 }
383
384 bool verify_subtype(address start, address end) const {
385 return types()->verify(start, end);
386 }
387
388 void print_on(outputStream* st, int current_offset = -1) const {
389 st->print("same_locals_1_stack_item_frame(@%d,",
390 offset_delta() + current_offset);
391 types()->print_on(st);
392 st->print(")");
393 }
394
395 void print_truncated(outputStream* st, int current_offset = -1) const {
396 st->print("same_locals_1_stack_item_frame(@%d), output truncated, Stackmap exceeds table size.",
397 offset_delta() + current_offset);
398 }
399};
400
401class same_locals_1_stack_item_extended : public stack_map_frame {
402 private:
403 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
404 address type_addr() const { return offset_delta_addr() + sizeof(u2); }
405
406 enum { _frame_id = 247 };
407
408 public:
409 static bool is_frame_type(u1 tag) {
410 return tag == _frame_id;
411 }
412
413 static same_locals_1_stack_item_extended* at(address addr) {
414 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 414, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
415 return (same_locals_1_stack_item_extended*)addr;
416 }
417
418 static same_locals_1_stack_item_extended* create_at(
419 address addr, int offset_delta, verification_type_info* vti) {
420 same_locals_1_stack_item_extended* sm =
421 (same_locals_1_stack_item_extended*)addr;
422 sm->set_frame_type(_frame_id);
423 sm->set_offset_delta(offset_delta);
424 if (vti != NULL__null) {
425 sm->set_type(vti);
426 }
427 return sm;
428 }
429
430 static size_t calculate_size(verification_type_info* vti) {
431 return sizeof(u1) + sizeof(u2) + vti->size();
432 }
433
434 size_t size() const { return calculate_size(types()); }
435 int offset_delta() const {
436 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
437 }
438
439 void set_offset_delta(int offset_delta) {
440 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
441 }
442
443 void set_type(verification_type_info* vti) {
444 verification_type_info* cur = types();
445 cur->copy_from(vti);
446 }
447
448 int number_of_types() const { return 1; }
449 verification_type_info* types() const {
450 return verification_type_info::at(type_addr());
451 }
452 bool is_valid_offset(int offset) { return true; }
453
454 bool verify_subtype(address start, address end) const {
455 return type_addr() < end && types()->verify(start, end);
456 }
457
458 void print_on(outputStream* st, int current_offset = -1) const {
459 st->print("same_locals_1_stack_item_extended(@%d,",
460 offset_delta() + current_offset);
461 types()->print_on(st);
462 st->print(")");
463 }
464
465 void print_truncated(outputStream* st, int current_offset = -1) const {
466 st->print("same_locals_1_stack_item_extended(@%d), output truncated, Stackmap exceeds table size.",
467 offset_delta() + current_offset);
468 }
469};
470
471class chop_frame : public stack_map_frame {
472 private:
473 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
474
475 static int frame_type_to_chops(u1 frame_type) {
476 int chop = 251 - frame_type;
477 return chop;
478 }
479
480 static u1 chops_to_frame_type(int chop) {
481 return 251 - chop;
482 }
483
484 public:
485 static bool is_frame_type(u1 tag) {
486 return frame_type_to_chops(tag) > 0 && frame_type_to_chops(tag) < 4;
487 }
488
489 static chop_frame* at(address addr) {
490 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 490, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
491 return (chop_frame*)addr;
492 }
493
494 static chop_frame* create_at(address addr, int offset_delta, int chops) {
495 chop_frame* sm = (chop_frame*)addr;
496 sm->set_chops(chops);
497 sm->set_offset_delta(offset_delta);
498 return sm;
499 }
500
501 static size_t calculate_size() {
502 return sizeof(u1) + sizeof(u2);
503 }
504
505 size_t size() const { return calculate_size(); }
506 int offset_delta() const {
507 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
508 }
509 void set_offset_delta(int offset_delta) {
510 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
511 }
512
513 int chops() const {
514 int chops = frame_type_to_chops(frame_type());
515 assert(chops > 0 && chops < 4, "Invalid number of chops in frame")do { if (!(chops > 0 && chops < 4)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 515, "assert(" "chops > 0 && chops < 4" ") failed"
, "Invalid number of chops in frame"); ::breakpoint(); } } while
(0);
516 return chops;
517 }
518 void set_chops(int chops) {
519 assert(chops > 0 && chops <= 3, "Bad number of chops")do { if (!(chops > 0 && chops <= 3)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 519, "assert(" "chops > 0 && chops <= 3" ") failed"
, "Bad number of chops"); ::breakpoint(); } } while (0);
520 set_frame_type(chops_to_frame_type(chops));
521 }
522
523 int number_of_types() const { return 0; }
524 verification_type_info* types() const { return NULL__null; }
525 bool is_valid_offset(int offset) { return true; }
526
527 bool verify_subtype(address start, address end) const {
528 return frame_type_addr() + size() <= end;
529 }
530
531 void print_on(outputStream* st, int current_offset = -1) const {
532 st->print("chop_frame(@%d,%d)", offset_delta() + current_offset, chops());
533 }
534
535 void print_truncated(outputStream* st, int current_offset = -1) const {
536 print_on(st, current_offset);
537 }
538};
539
540class append_frame : public stack_map_frame {
541 private:
542 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
543 address types_addr() const { return offset_delta_addr() + sizeof(u2); }
544
545 static int frame_type_to_appends(u1 frame_type) {
546 int append = frame_type - 251;
547 return append;
548 }
549
550 static u1 appends_to_frame_type(int appends) {
551 assert(appends > 0 && appends < 4, "Invalid append amount")do { if (!(appends > 0 && appends < 4)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 551, "assert(" "appends > 0 && appends < 4" ") failed"
, "Invalid append amount"); ::breakpoint(); } } while (0);
552 return 251 + appends;
553 }
554
555 public:
556 static bool is_frame_type(u1 tag) {
557 return frame_type_to_appends(tag) > 0 && frame_type_to_appends(tag) < 4;
558 }
559
560 static append_frame* at(address addr) {
561 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 561, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
562 return (append_frame*)addr;
563 }
564
565 static append_frame* create_at(
566 address addr, int offset_delta, int appends,
567 verification_type_info* types) {
568 append_frame* sm = (append_frame*)addr;
569 sm->set_appends(appends);
570 sm->set_offset_delta(offset_delta);
571 if (types != NULL__null) {
572 verification_type_info* cur = sm->types();
573 for (int i = 0; i < appends; ++i) {
574 cur->copy_from(types);
575 cur = cur->next();
576 types = types->next();
577 }
578 }
579 return sm;
580 }
581
582 static size_t calculate_size(int appends, verification_type_info* types) {
583 size_t sz = sizeof(u1) + sizeof(u2);
584 for (int i = 0; i < appends; ++i) {
585 sz += types->size();
586 types = types->next();
587 }
588 return sz;
589 }
590
591 static size_t max_size() {
592 return sizeof(u1) + sizeof(u2) + 3 * verification_type_info::max_size();
593 }
594
595 size_t size() const { return calculate_size(number_of_types(), types()); }
596 int offset_delta() const {
597 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
598 }
599
600 void set_offset_delta(int offset_delta) {
601 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
602 }
603
604 void set_appends(int appends) {
605 assert(appends > 0 && appends < 4, "Bad number of appends")do { if (!(appends > 0 && appends < 4)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 605, "assert(" "appends > 0 && appends < 4" ") failed"
, "Bad number of appends"); ::breakpoint(); } } while (0);
606 set_frame_type(appends_to_frame_type(appends));
607 }
608
609 int number_of_types() const {
610 int appends = frame_type_to_appends(frame_type());
611 assert(appends > 0 && appends < 4, "Invalid number of appends in frame")do { if (!(appends > 0 && appends < 4)) { (*g_assert_poison
) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 611, "assert(" "appends > 0 && appends < 4" ") failed"
, "Invalid number of appends in frame"); ::breakpoint(); } } while
(0);
612 return appends;
613 }
614 verification_type_info* types() const {
615 return verification_type_info::at(types_addr());
616 }
617 bool is_valid_offset(int offset) const { return true; }
618
619 bool verify_subtype(address start, address end) const {
620 verification_type_info* vti = types();
621 if ((address)vti < end && vti->verify(start, end)) {
622 int nof = number_of_types();
623 vti = vti->next();
624 if (nof < 2 || vti->verify(start, end)) {
625 vti = vti->next();
626 if (nof < 3 || vti->verify(start, end)) {
627 return true;
628 }
629 }
630 }
631 return false;
632 }
633
634 void print_on(outputStream* st, int current_offset = -1) const {
635 st->print("append_frame(@%d,", offset_delta() + current_offset);
636 verification_type_info* vti = types();
637 for (int i = 0; i < number_of_types(); ++i) {
638 vti->print_on(st);
639 if (i != number_of_types() - 1) {
640 st->print(",");
641 }
642 vti = vti->next();
643 }
644 st->print(")");
645 }
646
647 void print_truncated(outputStream* st, int current_offset = -1) const {
648 st->print("append_frame(@%d), output truncated, Stackmap exceeds table size.",
649 offset_delta() + current_offset);
650 }
651};
652
653class full_frame : public stack_map_frame {
654 private:
655 address offset_delta_addr() const { return frame_type_addr() + sizeof(u1); }
656 address num_locals_addr() const { return offset_delta_addr() + sizeof(u2); }
657 address locals_addr() const { return num_locals_addr() + sizeof(u2); }
658 address stack_slots_addr(address end_of_locals) const {
659 return end_of_locals; }
660 address stack_addr(address end_of_locals) const {
661 return stack_slots_addr(end_of_locals) + sizeof(u2); }
662
663 enum { _frame_id = 255 };
664
665 public:
666 static bool is_frame_type(u1 tag) {
667 return tag == _frame_id;
668 }
669
670 static full_frame* at(address addr) {
671 assert(is_frame_type(*addr), "Wrong frame id")do { if (!(is_frame_type(*addr))) { (*g_assert_poison) = 'X';
; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/stackMapTableFormat.hpp"
, 671, "assert(" "is_frame_type(*addr)" ") failed", "Wrong frame id"
); ::breakpoint(); } } while (0);
672 return (full_frame*)addr;
673 }
674
675 static full_frame* create_at(
676 address addr, int offset_delta, int num_locals,
677 verification_type_info* locals,
678 int stack_slots, verification_type_info* stack) {
679 full_frame* sm = (full_frame*)addr;
680 sm->set_frame_type(_frame_id);
681 sm->set_offset_delta(offset_delta);
682 sm->set_num_locals(num_locals);
683 if (locals != NULL__null) {
684 verification_type_info* cur = sm->locals();
685 for (int i = 0; i < num_locals; ++i) {
686 cur->copy_from(locals);
687 cur = cur->next();
688 locals = locals->next();
689 }
690 address end_of_locals = (address)cur;
691 sm->set_stack_slots(end_of_locals, stack_slots);
692 cur = sm->stack(end_of_locals);
693 for (int i = 0; i < stack_slots; ++i) {
694 cur->copy_from(stack);
695 cur = cur->next();
696 stack = stack->next();
697 }
698 }
699 return sm;
700 }
701
702 static size_t calculate_size(
703 int num_locals, verification_type_info* locals,
704 int stack_slots, verification_type_info* stack) {
705 size_t sz = sizeof(u1) + sizeof(u2) + sizeof(u2) + sizeof(u2);
706 verification_type_info* vti = locals;
707 for (int i = 0; i < num_locals; ++i) {
708 sz += vti->size();
709 vti = vti->next();
710 }
711 vti = stack;
712 for (int i = 0; i < stack_slots; ++i) {
713 sz += vti->size();
714 vti = vti->next();
715 }
716 return sz;
717 }
718
719 static size_t max_size(int locals, int stack) {
720 return sizeof(u1) + 3 * sizeof(u2) +
721 (locals + stack) * verification_type_info::max_size();
722 }
723
724 size_t size() const {
725 address eol = end_of_locals();
726 return calculate_size(num_locals(), locals(), stack_slots(eol), stack(eol));
727 }
728
729 int offset_delta() const {
730 return Bytes::get_Java_u2(offset_delta_addr()) + 1;
731 }
732 int num_locals() const { return Bytes::get_Java_u2(num_locals_addr()); }
733 verification_type_info* locals() const {
734 return verification_type_info::at(locals_addr());
735 }
736 address end_of_locals() const {
737 verification_type_info* vti = locals();
738 for (int i = 0; i < num_locals(); ++i) {
739 vti = vti->next();
740 }
741 return (address)vti;
742 }
743 int stack_slots(address end_of_locals) const {
744 return Bytes::get_Java_u2(stack_slots_addr(end_of_locals));
745 }
746 verification_type_info* stack(address end_of_locals) const {
747 return verification_type_info::at(stack_addr(end_of_locals));
748 }
749
750 void set_offset_delta(int offset_delta) {
751 Bytes::put_Java_u2(offset_delta_addr(), offset_delta - 1);
752 }
753 void set_num_locals(int num_locals) {
754 Bytes::put_Java_u2(num_locals_addr(), num_locals);
755 }
756 void set_stack_slots(address end_of_locals, int stack_slots) {
757 Bytes::put_Java_u2(stack_slots_addr(end_of_locals), stack_slots);
758 }
759
760 // These return only the locals. Extra processing is required for stack
761 // types of full frames.
762 int number_of_types() const { return num_locals(); }
763 verification_type_info* types() const { return locals(); }
764 bool is_valid_offset(int offset) { return true; }
765
766 bool verify_subtype(address start, address end) const {
767 verification_type_info* vti = types();
768 if ((address)vti >= end) {
769 return false;
770 }
771 int count = number_of_types();
772 for (int i = 0; i < count; ++i) {
773 if (!vti->verify(start, end)) {
774 return false;
775 }
776 vti = vti->next();
777 }
778 address eol = (address)vti;
779 if (eol + sizeof(u2) > end) {
780 return false;
781 }
782 count = stack_slots(eol);
Value stored to 'count' is never read
783 vti = stack(eol);
784 for (int i = 0; i < stack_slots(eol); ++i) {
785 if (!vti->verify(start, end)) {
786 return false;
787 }
788 vti = vti->next();
789 }
790 return true;
791 }
792
793 void print_on(outputStream* st, int current_offset = -1) const {
794 st->print("full_frame(@%d,{", offset_delta() + current_offset);
795 verification_type_info* vti = locals();
796 for (int i = 0; i < num_locals(); ++i) {
797 vti->print_on(st);
798 if (i != num_locals() - 1) {
799 st->print(",");
800 }
801 vti = vti->next();
802 }
803 st->print("},{");
804 address end_of_locals = (address)vti;
805 vti = stack(end_of_locals);
806 int ss = stack_slots(end_of_locals);
807 for (int i = 0; i < ss; ++i) {
808 vti->print_on(st);
809 if (i != ss - 1) {
810 st->print(",");
811 }
812 vti = vti->next();
813 }
814 st->print("})");
815 }
816
817 void print_truncated(outputStream* st, int current_offset = -1) const {
818 st->print("full_frame(@%d), output truncated, Stackmap exceeds table size.",
819 offset_delta() + current_offset);
820 }
821};
822
823#define VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \
824 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \
825 if (item_##stack_frame_type != NULL__null) { \
826 return item_##stack_frame_type->func_name args; \
827 }
828
829#define VOID_VIRTUAL_DISPATCH(stack_frame_type, func_name, args) \
830 stack_frame_type* item_##stack_frame_type = as_##stack_frame_type(); \
831 if (item_##stack_frame_type != NULL__null) { \
832 item_##stack_frame_type->func_name args; \
833 return; \
834 }
835
836size_t stack_map_frame::size() const {
837 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, size, ());
838 return 0;
839}
840
841int stack_map_frame::offset_delta() const {
842 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, offset_delta, ());
843 return 0;
844}
845
846void stack_map_frame::set_offset_delta(int offset_delta) {
847 FOR_EACH_STACKMAP_FRAME_TYPE(
848 VOID_VIRTUAL_DISPATCH, set_offset_delta, (offset_delta));
849}
850
851int stack_map_frame::number_of_types() const {
852 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, number_of_types, ());
853 return 0;
854}
855
856verification_type_info* stack_map_frame::types() const {
857 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, types, ());
858 return NULL__null;
859}
860
861bool stack_map_frame::is_valid_offset(int offset) const {
862 FOR_EACH_STACKMAP_FRAME_TYPE(VIRTUAL_DISPATCH, is_valid_offset, (offset));
863 return true;
864}
865
866bool stack_map_frame::verify(address start, address end) const {
867 if (frame_type_addr() >= start && frame_type_addr() < end) {
868 FOR_EACH_STACKMAP_FRAME_TYPE(
869 VIRTUAL_DISPATCH, verify_subtype, (start, end));
870 }
871 return false;
872}
873
874void stack_map_frame::print_on(outputStream* st, int offs = -1) const {
875 FOR_EACH_STACKMAP_FRAME_TYPE(VOID_VIRTUAL_DISPATCH, print_on, (st, offs));
876}
877
878void stack_map_frame::print_truncated(outputStream* st, int offs = -1) const {
879 FOR_EACH_STACKMAP_FRAME_TYPE(VOID_VIRTUAL_DISPATCH, print_truncated, (st, offs));
880}
881
882#undef VIRTUAL_DISPATCH
883#undef VOID_VIRTUAL_DISPATCH
884
885#define AS_SUBTYPE_DEF(stack_frame_type, arg1, arg2) \
886stack_frame_type* stack_map_frame::as_##stack_frame_type() const { \
887 if (stack_frame_type::is_frame_type(frame_type())) { \
888 return (stack_frame_type*)this; \
889 } else { \
890 return NULL__null; \
891 } \
892}
893
894FOR_EACH_STACKMAP_FRAME_TYPE(AS_SUBTYPE_DEF, x, x)
895#undef AS_SUBTYPE_DEF
896
897class stack_map_table {
898 private:
899 address number_of_entries_addr() const {
900 return (address)this;
901 }
902 address entries_addr() const {
903 return number_of_entries_addr() + sizeof(u2);
904 }
905 NONCOPYABLE(stack_map_table)stack_map_table(stack_map_table const&) = delete; stack_map_table
& operator=(stack_map_table const&) = delete;
906
907 protected:
908 // No constructors - should be 'private', but GCC issues a warning if it is
909 stack_map_table() {}
910
911 public:
912
913 static stack_map_table* at(address addr) {
914 return (stack_map_table*)addr;
915 }
916
917 u2 number_of_entries() const {
918 return Bytes::get_Java_u2(number_of_entries_addr());
919 }
920 stack_map_frame* entries() const {
921 return stack_map_frame::at(entries_addr());
922 }
923
924 void set_number_of_entries(u2 num) {
925 Bytes::put_Java_u2(number_of_entries_addr(), num);
926 }
927};
928
929class stack_map_table_attribute {
930 private:
931 address name_index_addr() const {
932 return (address)this; }
933 address attribute_length_addr() const {
934 return name_index_addr() + sizeof(u2); }
935 address stack_map_table_addr() const {
936 return attribute_length_addr() + sizeof(u4); }
937 NONCOPYABLE(stack_map_table_attribute)stack_map_table_attribute(stack_map_table_attribute const&
) = delete; stack_map_table_attribute& operator=(stack_map_table_attribute
const&) = delete;
938
939 protected:
940 // No constructors - should be 'private', but GCC issues a warning if it is
941 stack_map_table_attribute() {}
942
943 public:
944
945 static stack_map_table_attribute* at(address addr) {
946 return (stack_map_table_attribute*)addr;
947 }
948
949 u2 name_index() const {
950 return Bytes::get_Java_u2(name_index_addr()); }
951 u4 attribute_length() const {
952 return Bytes::get_Java_u4(attribute_length_addr()); }
953 stack_map_table* table() const {
954 return stack_map_table::at(stack_map_table_addr());
955 }
956
957 void set_name_index(u2 idx) {
958 Bytes::put_Java_u2(name_index_addr(), idx);
959 }
960 void set_attribute_length(u4 len) {
961 Bytes::put_Java_u4(attribute_length_addr(), len);
962 }
963};
964
965#undef FOR_EACH_STACKMAP_FRAME_TYPE
966
967#endif // SHARE_CLASSFILE_STACKMAPTABLEFORMAT_HPP