25
26 #include "precompiled.hpp"
27 #include "runtime/frame.inline.hpp"
28 #include "runtime/thread.hpp"
29
30 frame JavaThread::pd_last_frame() {
31 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
32
33 intptr_t* sp = last_Java_sp();
34 address pc = _anchor.last_Java_pc();
35
36 // Last_Java_pc ist not set, if we come here from compiled code.
37 if (pc == NULL) {
38 pc = (address) *(sp + 2);
39 }
40
41 return frame(sp, pc);
42 }
43
44 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
45 ucontext_t* uc = (ucontext_t*) ucontext;
46 *fr_addr = frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/],
47 (address)uc->uc_mcontext.regs->nip);
48 return true;
49 }
50
51 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/PPC.
52 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
53 Unimplemented();
54 return false;
55 }
56
57 void JavaThread::cache_global_variables() { }
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25
26 #include "precompiled.hpp"
27 #include "runtime/frame.inline.hpp"
28 #include "runtime/thread.hpp"
29
30 frame JavaThread::pd_last_frame() {
31 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
32
33 intptr_t* sp = last_Java_sp();
34 address pc = _anchor.last_Java_pc();
35
36 // Last_Java_pc ist not set, if we come here from compiled code.
37 if (pc == NULL) {
38 pc = (address) *(sp + 2);
39 }
40
41 return frame(sp, pc);
42 }
43
44 bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
45 assert(this->is_Java_thread(), "must be JavaThread");
46
47 // If we have a last_Java_frame, then we should use it even if
48 // isInJava == true. It should be more reliable than ucontext info.
49 if (has_last_Java_frame() && frame_anchor()->walkable()) {
50 *fr_addr = pd_last_frame();
51 return true;
52 }
53
54 // At this point, we don't have a last_Java_frame, so
55 // we try to glean some information out of the ucontext
56 // if we were running Java code when SIGPROF came in.
57 if (isInJava) {
58 ucontext_t* uc = (ucontext_t*) ucontext;
59 frame ret_frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/],
60 (address)uc->uc_mcontext.regs->nip);
61
62 if (ret_frame.pc() == NULL) {
63 // ucontext wasn't useful
64 return false;
65 }
66
67 if (ret_frame.is_interpreted_frame()) {
68 frame::ijava_state* istate = ret_frame.get_ijava_state();
69 if (!((Method*)(istate->method))->is_metaspace_object()) {
70 return false;
71 }
72 uint64_t reg_bcp = uc->uc_mcontext.regs->gpr[14/*R14_bcp*/];
73 uint64_t istate_bcp = istate->bcp;
74 uint64_t code_start = (uint64_t)(((Method*)(istate->method))->code_base());
75 uint64_t code_end = (uint64_t)(((Method*)istate->method)->code_base() + ((Method*)istate->method)->code_size());
76 if (istate_bcp >= code_start && istate_bcp < code_end) {
77 // we have a valid bcp, don't touch it, do nothing
78 } else if (reg_bcp >= code_start && reg_bcp < code_end) {
79 istate->bcp = reg_bcp;
80 } else {
81 return false;
82 }
83 }
84 if (!ret_frame.safe_for_sender(this)) {
85 // nothing else to try if the frame isn't good
86 return false;
87 }
88 *fr_addr = ret_frame;
89 return true;
90 }
91 // nothing else to try
92 return false;
93 }
94
95 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/PPC.
96 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
97 Unimplemented();
98 return false;
99 }
100
101 void JavaThread::cache_global_variables() { }
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