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Our existing AnonymousVMObject cloning flow contains an optimization wherein purgeable VMObjects which are marked volatile during the clone are created as a new zero-filled VMObject (as if it was purged), which lets us skip the expensive COW process. Unfortunately, one crucial part was missing: Marking the cloned region as purged, (which is the value returned from madvise when unmarking the region as volatile) so the userland logic was left unaware of the effective zero-ing of their memory region, resulting in odd behaviour and crashes in places like our malloc's large allocation support. |
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| Arch | ||
| Boot | ||
| Bus | ||
| Devices | ||
| FileSystem | ||
| Firmware/ACPI | ||
| Heap | ||
| Interrupts | ||
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| Locking | ||
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| CMakeLists.txt | ||
| Debug.h.in | ||
| embedmap.sh | ||
| Forward.h | ||
| generate-version-file.sh | ||
| kprintf.cpp | ||
| kstdio.h | ||
| KSyms.cpp | ||
| KSyms.h | ||
| mkmap.sh | ||
| SanCov.cpp | ||
| Sections.h | ||
| UnixTypes.h | ||