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8211768: [s390] Implement JFR profiling

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Reviewed-by: simonis, mdoerr
This commit is contained in:
Gunter Haug 2018-10-09 15:06:27 +02:00
parent 02a3be9920
commit a6cbbcf334
4 changed files with 182 additions and 12 deletions
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47
src/hotspot/os_cpu/linux_s390/thread_linux_s390.cpp
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@ -42,10 +42,51 @@ frame JavaThread::pd_last_frame() {
}
bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
ucontext_t* uc = (ucontext_t*) ucontext;
*fr_addr = frame((intptr_t*)uc->uc_mcontext.gregs[15/*REG_SP*/],
assert(this->is_Java_thread(), "must be JavaThread");
// If we have a last_Java_frame, then we should use it even if
// isInJava == true. It should be more reliable than ucontext info.
if (has_last_Java_frame() && frame_anchor()->walkable()) {
*fr_addr = pd_last_frame();
return true;
}
if (isInJava) {
ucontext_t* uc = (ucontext_t*) ucontext;
frame ret_frame((intptr_t*)uc->uc_mcontext.gregs[15/*Z_SP*/],
(address)uc->uc_mcontext.psw.addr);
return true;
if (ret_frame.pc() == NULL) {
// ucontext wasn't useful
return false;
}
if (ret_frame.is_interpreted_frame()) {
frame::z_ijava_state* istate = ret_frame.ijava_state_unchecked();
if (!((Method*)(istate->method))->is_metaspace_object()) {
return false;
}
uint64_t reg_bcp = uc->uc_mcontext.gregs[13/*Z_BCP*/];
uint64_t istate_bcp = istate->bcp;
uint64_t code_start = (uint64_t)(((Method*)(istate->method))->code_base());
uint64_t code_end = (uint64_t)(((Method*)istate->method)->code_base() + ((Method*)istate->method)->code_size());
if (istate_bcp >= code_start && istate_bcp < code_end) {
// we have a valid bcp, don't touch it, do nothing
} else if (reg_bcp >= code_start && reg_bcp < code_end) {
istate->bcp = reg_bcp;
} else {
return false;
}
}
if (!ret_frame.safe_for_sender(this)) {
// nothing else to try if the frame isn't good
return false;
}
*fr_addr = ret_frame;
return true;
}
// nothing else to try
return false;
}
// Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/S390x.