Thu, 24 Oct 2013 16:23:07 -0700
8026328: Setting a breakpoint on invokedynamic crashes the JVM
Reviewed-by: jrose, roland
1 /*
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3 * Copyright 2007, 2008, 2010 Red Hat, Inc.
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13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
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24 */
26 #ifndef CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
27 #define CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP
29 private:
30 ZeroFrame* volatile _last_Java_fp;
32 public:
33 // Each arch must define reset, save, restore
34 // These are used by objects that only care about:
35 // 1 - initializing a new state (thread creation, javaCalls)
36 // 2 - saving a current state (javaCalls)
37 // 3 - restoring an old state (javaCalls)
38 // Note that whenever _last_Java_sp != NULL other anchor fields
39 // must be valid. The profiler apparently depends on this.
41 void clear() {
42 // clearing _last_Java_sp must be first
43 _last_Java_sp = NULL;
44 // fence?
45 _last_Java_fp = NULL;
46 _last_Java_pc = NULL;
47 }
49 void copy(JavaFrameAnchor* src) {
50 set(src->_last_Java_sp, src->_last_Java_pc, src->_last_Java_fp);
51 }
53 void set(intptr_t* sp, address pc, ZeroFrame* fp) {
54 // In order to make sure the transition state is valid for "this"
55 // We must clear _last_Java_sp before copying the rest of the new
56 // data
57 //
58 // Hack Alert: Temporary bugfix for 4717480/4721647 To act like
59 // previous version (pd_cache_state) don't NULL _last_Java_sp
60 // unless the value is changing
61 //
62 if (_last_Java_sp != sp)
63 _last_Java_sp = NULL;
65 _last_Java_fp = fp;
66 _last_Java_pc = pc;
67 // Must be last so profiler will always see valid frame if
68 // has_last_frame() is true
69 _last_Java_sp = sp;
70 }
72 bool walkable() {
73 return true;
74 }
76 void make_walkable(JavaThread* thread) {
77 // nothing to do
78 }
80 intptr_t* last_Java_sp() const {
81 return _last_Java_sp;
82 }
84 ZeroFrame* last_Java_fp() const {
85 return _last_Java_fp;
86 }
88 address last_Java_pc() const {
89 return _last_Java_pc;
90 }
92 static ByteSize last_Java_fp_offset() {
93 return byte_offset_of(JavaFrameAnchor, _last_Java_fp);
94 }
96 #endif // CPU_ZERO_VM_JAVAFRAMEANCHOR_ZERO_HPP