Mercurial > hg > icedtea8-forest > hotspot
changeset 10783:c7ef664f8649
8184762: ZapStackSegments should use optimized memset
Reviewed-by: rkennke, mgerdin
| author | shade |
|---|---|
| date | Tue, 18 Jul 2017 09:53:54 +0200 |
| parents | 7b3ade0882f4 |
| children | d64fa7b92b5b |
| files | src/share/vm/utilities/globalDefinitions.hpp src/share/vm/utilities/stack.inline.hpp |
| diffstat | 2 files changed, 3 insertions(+), 5 deletions(-) [+] |
line wrap: on
line diff
--- a/src/share/vm/utilities/globalDefinitions.hpp Fri Mar 01 10:00:03 2019 -0800 +++ b/src/share/vm/utilities/globalDefinitions.hpp Tue Jul 18 09:53:54 2017 +0200 @@ -1058,6 +1058,7 @@ const intptr_t badAddressVal = -2; // generic "bad address" value const intptr_t badOopVal = -1; // generic "bad oop" value const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC +const int badStackSegVal = 0xCA; // value used to zap stack segments const int badHandleValue = 0xBC; // value used to zap vm handle area const int badResourceValue = 0xAB; // value used to zap resource area const int freeBlockPad = 0xBA; // value used to pad freed blocks.
--- a/src/share/vm/utilities/stack.inline.hpp Fri Mar 01 10:00:03 2019 -0800 +++ b/src/share/vm/utilities/stack.inline.hpp Tue Jul 18 09:53:54 2017 +0200 @@ -26,6 +26,7 @@ #define SHARE_VM_UTILITIES_STACK_INLINE_HPP #include "utilities/stack.hpp" +#include "utilities/copy.hpp" template <MEMFLAGS F> StackBase<F>::StackBase(size_t segment_size, size_t max_cache_size, size_t max_size): @@ -227,11 +228,7 @@ { if (!ZapStackSegments) return; const size_t zap_bytes = segment_bytes() - (zap_link_field ? 0 : sizeof(E*)); - uint32_t* cur = (uint32_t*)seg; - const uint32_t* end = cur + zap_bytes / sizeof(uint32_t); - while (cur < end) { - *cur++ = 0xfadfaded; - } + Copy::fill_to_bytes(seg, zap_bytes, badStackSegVal); } #endif