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Call FlushInstructionCache in CFG test #83168

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Merged
MichalStrehovsky merged 1 commit into from
Mar 9, 2023
Merged

Call FlushInstructionCache in CFG test #83168

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13 changes: 12 additions & 1 deletion src/tests/nativeaot/SmokeTests/ControlFlowGuard/ControlFlowGuard.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -174,9 +174,11 @@ static IntPtr CreateNewMethod()
if (s_armed)
flProtect |= 0x40000000 /* TARGETS_INVALID */;

uint allocSize = 4096;

IntPtr address = VirtualAlloc(
lpAddress: IntPtr.Zero,
dwSize: 4096,
dwSize: allocSize,
flAllocationType: 0x00001000 | 0x00002000 /* COMMIT+RESERVE*/,
flProtect: flProtect);

Expand All @@ -196,6 +198,15 @@ static IntPtr CreateNewMethod()
throw new NotSupportedException();
}

[DllImport("kernel32", ExactSpelling = true)]
static extern IntPtr GetCurrentProcess();

[DllImport("kernel32", ExactSpelling = true, SetLastError = true)]
static extern int FlushInstructionCache(IntPtr hProcess, IntPtr lpBaseAddress, nuint dwSize);

if (FlushInstructionCache(GetCurrentProcess(), address, allocSize) == 0)
Console.WriteLine("FlushInstructionCache failed");

return address;
}
}