Mercurial > hg > truffle

comparison src/share/vm/utilities/debug.hpp @ 4872:aa3d708d67c4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7141200: log some interesting information in ring buffers for crashes Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
author never
date Wed, 01 Feb 2012 07:59:01 -0800
parents 1d1603768966
children 6c5b7a6becc8
comparison
equal deleted inserted replaced
4871:f067b4e0e04b 4872:aa3d708d67c4
1 /* 1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2012, 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.
31 #include <stdarg.h> 31 #include <stdarg.h>
32 32
33 // Simple class to format the ctor arguments into a fixed-sized buffer. 33 // Simple class to format the ctor arguments into a fixed-sized buffer.
34 template <size_t bufsz = 256> 34 template <size_t bufsz = 256>
35 class FormatBuffer { 35 class FormatBuffer {
36 public: 36 public:
37 inline FormatBuffer(const char * format, ...); 37 inline FormatBuffer(const char * format, ...);
38 inline void append(const char* format, ...); 38 inline void append(const char* format, ...);
39 inline void print(const char* format, ...);
40 inline void printv(const char* format, va_list ap);
39 operator const char *() const { return _buf; } 41 operator const char *() const { return _buf; }
40 42
41 private: 43 char* buffer() { return _buf; }
44 int size() { return bufsz; }
45
46 private:
42 FormatBuffer(const FormatBuffer &); // prevent copies 47 FormatBuffer(const FormatBuffer &); // prevent copies
43 48
44 private: 49 protected:
45 char _buf[bufsz]; 50 char _buf[bufsz];
51
52 inline FormatBuffer();
46 }; 53 };
47 54
48 template <size_t bufsz> 55 template <size_t bufsz>
49 FormatBuffer<bufsz>::FormatBuffer(const char * format, ...) { 56 FormatBuffer<bufsz>::FormatBuffer(const char * format, ...) {
50 va_list argp; 57 va_list argp;
51 va_start(argp, format); 58 va_start(argp, format);
52 jio_vsnprintf(_buf, bufsz, format, argp); 59 jio_vsnprintf(_buf, bufsz, format, argp);
53 va_end(argp); 60 va_end(argp);
61 }
62
63 template <size_t bufsz>
64 FormatBuffer<bufsz>::FormatBuffer() {
65 _buf[0] = '\0';
66 }
67
68 template <size_t bufsz>
69 void FormatBuffer<bufsz>::print(const char * format, ...) {
70 va_list argp;
71 va_start(argp, format);
72 jio_vsnprintf(_buf, bufsz, format, argp);
73 va_end(argp);
74 }
75
76 template <size_t bufsz>
77 void FormatBuffer<bufsz>::printv(const char * format, va_list argp) {
78 jio_vsnprintf(_buf, bufsz, format, argp);
54 } 79 }
55 80
56 template <size_t bufsz> 81 template <size_t bufsz>
57 void FormatBuffer<bufsz>::append(const char* format, ...) { 82 void FormatBuffer<bufsz>::append(const char* format, ...) {
58 // Given that the constructor does a vsnprintf we can assume that 83 // Given that the constructor does a vsnprintf we can assume that