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https://github.com/FEX-Emu/FEX.git
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Ryan Houdek
e862c904a9
When the JIT CodeBuffer overflows, we will now catch accesses to the guard page and longjump while restarting the JIT with a larger buffer request. Fixes #4877
36 lines
558 B
NASM
36 lines
558 B
NASM
%ifdef CONFIG
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{
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"RegData": {
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"RAX": "1"
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},
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"Env": { "FEX_MAXINST" : "41010", "FEX_MULTIBLOCK": "1", "FEX_TSOENABLED": "0" }
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}
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%endif
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; FEX had a bug where its JIT heuristic wouldn't catch all cases, and allocations would overflow and crash.
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%macro OverflowBuffer 0
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%rep 256
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; This instruction is absolutely abysmal under FEX.
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; Easily stresses our heuristic for block sizes
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rep movsq
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%endrep
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%endmacro
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mov rax, 0
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cmp rax, 0
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mov rcx, 0
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mov rdi, 1
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mov rsi, 2
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jz long_jump
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OverflowBuffer
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long_jump:
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mov rax, 1
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hlt
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data:
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dq 0, 0, 0, 0
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