RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-19 00:45:08 +00:00
Code Issues Activity Actions

Teach Process::exec() about the magic of file-backed VMO's.

Browse source 
This is really sweet! :^) The four instances of /bin/sh spawned at
startup now share their read-only text pages.

There are problems and limitations here, and plenty of room for
improvement. But it kinda works.
This commit is contained in:
Andreas Kling 2018-11-08 21:20:09 +01:00
parent 992769c9d4
commit cd1e7419f0
10 changed files with 159 additions and 70 deletions
Download patch file Download diff file Expand all files Collapse all files

17
Kernel/ProcFileSystem.cpp
View file

@ -167,25 +167,16 @@ void ProcFileSystem::removeProcess(Process& process)
ByteBuffer procfs$mm()
{
// FIXME: Implement
#if 0
InterruptDisabler disabler;
size_t zonePageCount = 0;
for (auto* zone : MM.m_zones)
zonePageCount += zone->m_pages.size();
auto buffer = ByteBuffer::createUninitialized(1024 + 80 * MM.m_zones.size() + zonePageCount * 10);
auto buffer = ByteBuffer::createUninitialized(1024 + 80 * MM.m_vmos.size());
char* ptr = (char*)buffer.pointer();
for (auto* zone : MM.m_zones) {
ptr += ksprintf(ptr, "Zone %p size: %u\n ", zone, zone->size());
for (auto page : zone->m_pages)
ptr += ksprintf(ptr, "%x ", page);
ptr += ksprintf(ptr, "\n");
for (auto* vmo : MM.m_vmos) {
ptr += ksprintf(ptr, "VMO: %p %s (p:%u, r:%u)\n", vmo, vmo->name().characters(), vmo->page_count(), vmo->retainCount());
}
ptr += ksprintf(ptr, "Zone count: %u\n", MM.m_zones.size());
ptr += ksprintf(ptr, "VMO count: %u\n", MM.m_vmos.size());
ptr += ksprintf(ptr, "Free physical pages: %u\n", MM.m_free_physical_pages.size());
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
#endif
return { };
}