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8207392: [PPC64] Implement JFR profiling

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Reviewed-by: simonis, goetz
This commit is contained in:
Gunter Haug 2018-07-24 12:57:40 +02:00
parent 577cdf1f49
commit 0ec91d3125
2 changed files with 177 additions and 13 deletions
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56
src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.cpp
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@ -42,16 +42,60 @@ 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.regs->gpr[1/*REG_SP*/],
(address)uc->uc_mcontext.regs->nip);
return true;
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;
}
// At this point, we don't have a last_Java_frame, so
// we try to glean some information out of the ucontext
// if we were running Java code when SIGPROF came in.
if (isInJava) {
ucontext_t* uc = (ucontext_t*) ucontext;
frame ret_frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/],
(address)uc->uc_mcontext.regs->nip);
if (ret_frame.pc() == NULL) {
// ucontext wasn't useful
return false;
}
if (ret_frame.is_interpreted_frame()) {
frame::ijava_state* istate = ret_frame.get_ijava_state();
if (!((Method*)(istate->method))->is_metaspace_object()) {
return false;
}
uint64_t reg_bcp = uc->uc_mcontext.regs->gpr[14/*R14_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/PPC.
bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
Unimplemented();
return false;
assert(this->is_Java_thread(), "must be JavaThread");
return pd_get_top_frame_for_profiling(fr_addr, ucontext, isInJava);
}
void JavaThread::cache_global_variables() { }