================
@@ -443,8 +443,8 @@ static const MemoryMapParams Linux_I386_MemoryMapParams = {
static const MemoryMapParams Linux_X86_64_MemoryMapParams = {
0, // AndMask (not used)
0x500000000000, // XorMask
- 0, // ShadowBase (not used)
- 0x100000000000, // OriginBase
+ 0x200000, // ShadowBase (== kShadowOffset)
----------------
azat wrote:
Also AFAICS it is free (or almost free), since the real asm looks like (with
`-O3`)
```asm
movq $0x0, 0x200000(%rax)
```
Instead of
```asm
movq $0x0, (%rax)
```
And I've also tested the performance on Intel, it looks the same -
https://pastila.nl/?00b2e9d6/e11d914e0d9309f3444c4b244a9fa469#Ydv8nM20XBa2PJAPq+I6mQ==
https://github.com/llvm/llvm-project/pull/171993
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