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comparison src/cpu/sparc/vm/macroAssembler_sparc.cpp @ 13047:be525e91f65b

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8026775: nsk/jvmti/RedefineClasses/StressRedefine crashes due to EXCEPTION_ACCESS_VIOLATION Summary: Uncommon trap blob did not bang all the stack shadow pages Reviewed-by: kvn, twisti, iveresov, jrose
author mikael
date Wed, 06 Nov 2013 06:51:24 -0800
parents b4aa8fc5d0d5
children 0bf37f737702
comparison
equal deleted inserted replaced
13046:613e6a6fc328 13047:be525e91f65b
3524 cmp(Rsize, G0); 3524 cmp(Rsize, G0);
3525 br(Assembler::greater, false, Assembler::pn, loop); 3525 br(Assembler::greater, false, Assembler::pn, loop);
3526 delayed()->sub(Rtsp, Roffset, Rtsp); 3526 delayed()->sub(Rtsp, Roffset, Rtsp);
3527 3527
3528 // Bang down shadow pages too. 3528 // Bang down shadow pages too.
3529 // The -1 because we already subtracted 1 page. 3529 // At this point, (tmp-0) is the last address touched, so don't
3530 for (int i = 0; i< StackShadowPages-1; i++) { 3530 // touch it again. (It was touched as (tmp-pagesize) but then tmp
3531 // was post-decremented.) Skip this address by starting at i=1, and
3532 // touch a few more pages below. N.B. It is important to touch all
3533 // the way down to and including i=StackShadowPages.
3534 for (int i = 1; i <= StackShadowPages; i++) {
3531 set((-i*offset)+STACK_BIAS, Rscratch); 3535 set((-i*offset)+STACK_BIAS, Rscratch);
3532 st(G0, Rtsp, Rscratch); 3536 st(G0, Rtsp, Rscratch);
3533 } 3537 }
3534 } 3538 }
3535 3539