56 // At this point, we don't have a last_Java_frame, so
57 // we try to glean some information out of the CONTEXT
58 // if we were running Java code when SIGPROF came in.
59 if (isInJava) {
60 CONTEXT* uc = (CONTEXT*)ucontext;
61
62 #ifdef AMD64
63 intptr_t* ret_fp = (intptr_t*) uc->Rbp;
64 intptr_t* ret_sp = (intptr_t*) uc->Rsp;
65 ExtendedPC addr = ExtendedPC((address)uc->Rip);
66 #else
67 intptr_t* ret_fp = (intptr_t*) uc->Ebp;
68 intptr_t* ret_sp = (intptr_t*) uc->Esp;
69 ExtendedPC addr = ExtendedPC((address)uc->Eip);
70 #endif // AMD64
71 if (addr.pc() == NULL || ret_sp == NULL ) {
72 // CONTEXT wasn't useful
73 return false;
74 }
75
76 #if INCLUDE_CDS
77 if (UseSharedSpaces && MetaspaceShared::is_in_shared_region(addr.pc(), MetaspaceShared::md)) {
78 // In the middle of a trampoline call. Bail out for safety.
79 // This happens rarely so shouldn't affect profiling.
80 return false;
81 }
82 #endif
83
84 frame ret_frame(ret_sp, ret_fp, addr.pc());
85 if (!ret_frame.safe_for_sender(jt)) {
86 #if defined(COMPILER2) || INCLUDE_JVMCI
87 // C2 and JVMCI use ebp as a general register see if NULL fp helps
88 frame ret_frame2(ret_sp, NULL, addr.pc());
89 if (!ret_frame2.safe_for_sender(jt)) {
90 // nothing else to try if the frame isn't good
91 return false;
92 }
93 ret_frame = ret_frame2;
94 #else
95 // nothing else to try if the frame isn't good
96 return false;
97 #endif /* COMPILER2 || INCLUDE_JVMCI */
98 }
99 *fr_addr = ret_frame;
100 return true;
101 }
102
|
56 // At this point, we don't have a last_Java_frame, so
57 // we try to glean some information out of the CONTEXT
58 // if we were running Java code when SIGPROF came in.
59 if (isInJava) {
60 CONTEXT* uc = (CONTEXT*)ucontext;
61
62 #ifdef AMD64
63 intptr_t* ret_fp = (intptr_t*) uc->Rbp;
64 intptr_t* ret_sp = (intptr_t*) uc->Rsp;
65 ExtendedPC addr = ExtendedPC((address)uc->Rip);
66 #else
67 intptr_t* ret_fp = (intptr_t*) uc->Ebp;
68 intptr_t* ret_sp = (intptr_t*) uc->Esp;
69 ExtendedPC addr = ExtendedPC((address)uc->Eip);
70 #endif // AMD64
71 if (addr.pc() == NULL || ret_sp == NULL ) {
72 // CONTEXT wasn't useful
73 return false;
74 }
75
76 if (MetaspaceShared::is_in_trampoline_frame(addr.pc())) {
77 // In the middle of a trampoline call. Bail out for safety.
78 // This happens rarely so shouldn't affect profiling.
79 return false;
80 }
81
82 frame ret_frame(ret_sp, ret_fp, addr.pc());
83 if (!ret_frame.safe_for_sender(jt)) {
84 #if defined(COMPILER2) || INCLUDE_JVMCI
85 // C2 and JVMCI use ebp as a general register see if NULL fp helps
86 frame ret_frame2(ret_sp, NULL, addr.pc());
87 if (!ret_frame2.safe_for_sender(jt)) {
88 // nothing else to try if the frame isn't good
89 return false;
90 }
91 ret_frame = ret_frame2;
92 #else
93 // nothing else to try if the frame isn't good
94 return false;
95 #endif /* COMPILER2 || INCLUDE_JVMCI */
96 }
97 *fr_addr = ret_frame;
98 return true;
99 }
100
|