1 /*
2 * Copyright (c) 1997, 2014, 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_VM_UTILITIES_DEBUG_HPP
26 #define SHARE_VM_UTILITIES_DEBUG_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29 #include "prims/jvm.h"
30
31 #include <stdarg.h>
32
33 // Simple class to format the ctor arguments into a fixed-sized buffer.
34 class FormatBufferBase {
35 protected:
36 char* _buf;
37 inline FormatBufferBase(char* buf) : _buf(buf) {}
38 public:
39 operator const char *() const { return _buf; }
40 };
41
42 // Use resource area for buffer
43 #define RES_BUFSZ 256
44 class FormatBufferResource : public FormatBufferBase {
45 public:
46 FormatBufferResource(const char * format, ...) ATTRIBUTE_PRINTF(2, 3);
47 };
48
49 // Use stack for buffer
50 template <size_t bufsz = 256>
51 class FormatBuffer : public FormatBufferBase {
52 public:
53 inline FormatBuffer(const char * format, ...) ATTRIBUTE_PRINTF(2, 3);
54 inline void append(const char* format, ...) ATTRIBUTE_PRINTF(2, 3);
55 inline void print(const char* format, ...) ATTRIBUTE_PRINTF(2, 3);
56 inline void printv(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0);
57
58 char* buffer() { return _buf; }
59 int size() { return bufsz; }
60
61 private:
62 FormatBuffer(const FormatBuffer &); // prevent copies
63 char _buffer[bufsz];
64
65 protected:
66 inline FormatBuffer();
67 };
68
69 template <size_t bufsz>
70 FormatBuffer<bufsz>::FormatBuffer(const char * format, ...) : FormatBufferBase(_buffer) {
71 va_list argp;
72 va_start(argp, format);
73 jio_vsnprintf(_buf, bufsz, format, argp);
74 va_end(argp);
75 }
76
77 template <size_t bufsz>
78 FormatBuffer<bufsz>::FormatBuffer() : FormatBufferBase(_buffer) {
79 _buf[0] = '\0';
80 }
81
82 template <size_t bufsz>
83 void FormatBuffer<bufsz>::print(const char * format, ...) {
84 va_list argp;
85 va_start(argp, format);
86 jio_vsnprintf(_buf, bufsz, format, argp);
87 va_end(argp);
88 }
89
90 template <size_t bufsz>
91 void FormatBuffer<bufsz>::printv(const char * format, va_list argp) {
92 jio_vsnprintf(_buf, bufsz, format, argp);
93 }
94
95 template <size_t bufsz>
96 void FormatBuffer<bufsz>::append(const char* format, ...) {
97 // Given that the constructor does a vsnprintf we can assume that
98 // _buf is already initialized.
99 size_t len = strlen(_buf);
100 char* buf_end = _buf + len;
101
102 va_list argp;
103 va_start(argp, format);
104 jio_vsnprintf(buf_end, bufsz - len, format, argp);
105 va_end(argp);
106 }
107
108 // Used to format messages for vmassert(), guarantee(), fatal(), etc.
109 typedef FormatBuffer<> err_msg;
110 typedef FormatBufferResource err_msg_res;
111
112 // assertions
113 #ifndef ASSERT
114 #define vmassert(p, msg)
115 #else
116 #define vmassert(p, msg) \
117 do { \
118 if (!(p)) { \
119 report_vm_error(__FILE__, __LINE__, "vmassert(" #p ") failed", msg); \
120 BREAKPOINT; \
121 } \
122 } while (0)
123 #endif
124
125 // For backward compatibility.
126 #define assert(p, msg) vmassert(p, msg)
127
128 // This version of vmassert is for use with checking return status from
129 // library calls that return actual error values eg. EINVAL,
130 // ENOMEM etc, rather than returning -1 and setting errno.
131 // When the status is not what is expected it is very useful to know
132 // what status was actually returned, so we pass the status variable as
133 // an extra arg and use strerror to convert it to a meaningful string
134 // like "Invalid argument", "out of memory" etc
135 #define vmassert_status(p, status, msg) \
136 vmassert(p, err_msg("error %s(%d), %s", strerror(status), status, msg))
137
138 // For backward compatibility.
139 #define assert_status(p, status, msg) vmassert_status(p, status, msg)
140
141 // guarantee is like vmassert except it's always executed -- use it for
142 // cheap tests that catch errors that would otherwise be hard to find.
143 // guarantee is also used for Verify options.
144 #define guarantee(p, msg) \
145 do { \
146 if (!(p)) { \
147 report_vm_error(__FILE__, __LINE__, "guarantee(" #p ") failed", msg); \
148 BREAKPOINT; \
149 } \
150 } while (0)
151
152 #define fatal(msg) \
153 do { \
154 report_fatal(__FILE__, __LINE__, msg); \
155 BREAKPOINT; \
156 } while (0)
157
158 // out of memory
159 #define vm_exit_out_of_memory(size, vm_err_type, msg) \
160 do { \
161 report_vm_out_of_memory(__FILE__, __LINE__, size, vm_err_type, msg); \
162 BREAKPOINT; \
163 } while (0)
164
165 #define ShouldNotCallThis() \
166 do { \
167 report_should_not_call(__FILE__, __LINE__); \
168 BREAKPOINT; \
169 } while (0)
170
171 #define ShouldNotReachHere() \
172 do { \
173 report_should_not_reach_here(__FILE__, __LINE__); \
174 BREAKPOINT; \
175 } while (0)
176
177 #define Unimplemented() \
178 do { \
179 report_unimplemented(__FILE__, __LINE__); \
180 BREAKPOINT; \
181 } while (0)
182
183 #define Untested(msg) \
184 do { \
185 report_untested(__FILE__, __LINE__, msg); \
186 BREAKPOINT; \
187 } while (0);
188
189
190 // types of VM error - originally in vmError.hpp
191 enum VMErrorType {
192 INTERNAL_ERROR = 0xe0000000,
193 OOM_MALLOC_ERROR = 0xe0000001,
194 OOM_MMAP_ERROR = 0xe0000002
195 };
196
197 // error reporting helper functions
198 void report_vm_error(const char* file, int line, const char* error_msg,
199 const char* detail_msg = NULL);
200 void report_fatal(const char* file, int line, const char* message);
201 void report_vm_out_of_memory(const char* file, int line, size_t size,
202 VMErrorType vm_err_type, const char* message);
203 void report_should_not_call(const char* file, int line);
204 void report_should_not_reach_here(const char* file, int line);
205 void report_unimplemented(const char* file, int line);
206 void report_untested(const char* file, int line, const char* message);
207
208 void warning(const char* format, ...) ATTRIBUTE_PRINTF(1, 2);
209
210 #ifdef ASSERT
211 // Compile-time asserts.
212 template <bool> struct StaticAssert;
213 template <> struct StaticAssert<true> {};
214
215 // Only StaticAssert<true> is defined, so if cond evaluates to false we get
216 // a compile time exception when trying to use StaticAssert<false>.
217 #define STATIC_ASSERT(cond) \
218 do { \
219 StaticAssert<(cond)> DUMMY_STATIC_ASSERT; \
220 (void)DUMMY_STATIC_ASSERT; /* ignore */ \
221 } while (false)
222 #else
223 #define STATIC_ASSERT(cond)
224 #endif
225
226 // out of shared space reporting
227 enum SharedSpaceType {
228 SharedReadOnly,
229 SharedReadWrite,
230 SharedMiscData,
231 SharedMiscCode
232 };
233
234 void report_out_of_shared_space(SharedSpaceType space_type);
235
236 // out of memory reporting
237 void report_java_out_of_memory(const char* message);
238
239 // Support for self-destruct
240 bool is_error_reported();
241 void set_error_reported();
242
243 /* Test vmassert(), fatal(), guarantee(), etc. */
244 NOT_PRODUCT(void test_error_handler();)
245
246 void pd_ps(frame f);
247 void pd_obfuscate_location(char *buf, size_t buflen);
248
249 class outputStream;
250 void print_native_stack(outputStream* st, frame fr, Thread* t, char* buf, int buf_size);
251
252 #endif // SHARE_VM_UTILITIES_DEBUG_HPP