infernap12/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2026-03-14 18:03:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

8254696: safepointMechanism_aix needs adaptation for JDK-8253180

Browse Source 
Reviewed-by: dholmes, clanger
This commit is contained in:
Martin Doerr 2020-10-14 08:17:13 +00:00
parent b509e31e5f
commit 9eeeb8a20f
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/hotspot/os/aix/safepointMechanism_aix.cpp
View File

@ -37,6 +37,10 @@ void SafepointMechanism::pd_initialize() {
return;
}
// Poll bit values
_poll_word_armed_value = poll_bit();
_poll_word_disarmed_value = ~_poll_word_armed_value;
// Allocate one protected page
char* map_address = (char*)MAP_FAILED;
const size_t page_size = os::vm_page_size();
@ -104,8 +108,8 @@ void SafepointMechanism::pd_initialize() {
if (!os::guard_memory((char*)_polling_page, page_size)) {
fatal("Could not protect polling page");
}
intptr_t bad_page_val = reinterpret_cast<intptr_t>(map_address),
good_page_val = bad_page_val + os::vm_page_size();
_poll_armed_value = reinterpret_cast<void*>(bad_page_val + poll_bit());
_poll_disarmed_value = reinterpret_cast<void*>(good_page_val);
uintptr_t bad_page_val = reinterpret_cast<uintptr_t>(map_address),
good_page_val = bad_page_val + os::vm_page_size();
_poll_page_armed_value = bad_page_val + poll_bit();
_poll_page_disarmed_value = good_page_val;
}