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7141200: log some interesting information in ring buffers for crashes

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Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
This commit is contained in:
Tom Rodriguez 2012-02-01 07:59:01 -08:00
parent a59952f4c9
commit 5a41427b37
30 changed files with 539 additions and 369 deletions
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33
hotspot/src/share/vm/utilities/debug.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -33,16 +33,23 @@
// Simple class to format the ctor arguments into a fixed-sized buffer.
template <size_t bufsz = 256>
class FormatBuffer {
public:
public:
inline FormatBuffer(const char * format, ...);
inline void append(const char* format, ...);
inline void print(const char* format, ...);
inline void printv(const char* format, va_list ap);
operator const char *() const { return _buf; }
private:
char* buffer() { return _buf; }
int size() { return bufsz; }
private:
FormatBuffer(const FormatBuffer &); // prevent copies
private:
protected:
char _buf[bufsz];
inline FormatBuffer();
};
template <size_t bufsz>
@ -53,6 +60,24 @@ FormatBuffer<bufsz>::FormatBuffer(const char * format, ...) {
va_end(argp);
}
template <size_t bufsz>
FormatBuffer<bufsz>::FormatBuffer() {
_buf[0] = '\0';
}
template <size_t bufsz>
void FormatBuffer<bufsz>::print(const char * format, ...) {
va_list argp;
va_start(argp, format);
jio_vsnprintf(_buf, bufsz, format, argp);
va_end(argp);
}
template <size_t bufsz>
void FormatBuffer<bufsz>::printv(const char * format, va_list argp) {
jio_vsnprintf(_buf, bufsz, format, argp);
}
template <size_t bufsz>
void FormatBuffer<bufsz>::append(const char* format, ...) {
// Given that the constructor does a vsnprintf we can assume that