Mercurial > hg > graal-jvmci-8
diff src/cpu/x86/vm/c1_MacroAssembler_x86.cpp @ 4947:fd8114661503
7125136: SIGILL on linux amd64 in gc/ArrayJuggle/Juggle29
Summary: For C2 moved saving EBP after ESP adjustment. For C1 generated 5 byte nop instruction first if needed.
Reviewed-by: never, twisti, azeemj
| author | kvn |
|---|---|
| date | Wed, 15 Feb 2012 21:37:49 -0800 |
| parents | 069ab3f976d3 |
| children | 33df1aeaebbf da91efe96a93 |
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--- a/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp Wed Feb 15 16:29:40 2012 -0800 +++ b/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp Wed Feb 15 21:37:49 2012 -0800 @@ -381,6 +381,16 @@ void C1_MacroAssembler::verified_entry() { + if (C1Breakpoint || VerifyFPU || !UseStackBanging) { + // Verified Entry first instruction should be 5 bytes long for correct + // patching by patch_verified_entry(). + // + // C1Breakpoint and VerifyFPU have one byte first instruction. + // Also first instruction will be one byte "push(rbp)" if stack banging + // code is not generated (see build_frame() above). + // For all these cases generate long instruction first. + fat_nop(); + } if (C1Breakpoint)int3(); // build frame verify_FPU(0, "method_entry");