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 // HeapDumper is used to dump the java heap to file in HPROF binary format:
26 //
27 // { HeapDumper dumper(true /* full GC before heap dump */);
28 // if (dumper.dump("/export/java.hprof")) {
29 // ResourceMark rm;
30 // tty->print_cr("Dump failed: %s", dumper.error_as_C_string());
31 // } else {
32 // // dump succeeded
33 // }
34 // }
35 //
36
37 class HeapDumper : public StackObj {
38 private:
39 char* _error;
40 bool _print_to_tty;
41 bool _gc_before_heap_dump;
42 bool _oome;
43 elapsedTimer _t;
44
56 elapsedTimer* timer() { return &_t; }
57
58 static void dump_heap(bool oome);
59
60 public:
61 HeapDumper(bool gc_before_heap_dump) :
62 _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false), _oome(false) { }
63
64 ~HeapDumper();
65
66 // dumps the heap to the specified file, returns 0 if success.
67 int dump(const char* path);
68
69 // returns error message (resource allocated), or NULL if no error
70 char* error_as_C_string() const;
71
72 static void dump_heap() KERNEL_RETURN;
73
74 static void dump_heap_from_oome() KERNEL_RETURN;
75 };
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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_SERVICES_HEAPDUMPER_HPP
26 #define SHARE_VM_SERVICES_HEAPDUMPER_HPP
27
28 #include "memory/allocation.hpp"
29 #include "oops/klassOop.hpp"
30 #include "oops/oop.hpp"
31 #include "runtime/os.hpp"
32
33 // HeapDumper is used to dump the java heap to file in HPROF binary format:
34 //
35 // { HeapDumper dumper(true /* full GC before heap dump */);
36 // if (dumper.dump("/export/java.hprof")) {
37 // ResourceMark rm;
38 // tty->print_cr("Dump failed: %s", dumper.error_as_C_string());
39 // } else {
40 // // dump succeeded
41 // }
42 // }
43 //
44
45 class HeapDumper : public StackObj {
46 private:
47 char* _error;
48 bool _print_to_tty;
49 bool _gc_before_heap_dump;
50 bool _oome;
51 elapsedTimer _t;
52
64 elapsedTimer* timer() { return &_t; }
65
66 static void dump_heap(bool oome);
67
68 public:
69 HeapDumper(bool gc_before_heap_dump) :
70 _gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false), _oome(false) { }
71
72 ~HeapDumper();
73
74 // dumps the heap to the specified file, returns 0 if success.
75 int dump(const char* path);
76
77 // returns error message (resource allocated), or NULL if no error
78 char* error_as_C_string() const;
79
80 static void dump_heap() KERNEL_RETURN;
81
82 static void dump_heap_from_oome() KERNEL_RETURN;
83 };
84
85 #endif // SHARE_VM_SERVICES_HEAPDUMPER_HPP
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