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Add a VMO pointer to VNode.

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This way, if anyone tries to map an already mapped file, we share the VMO.
This commit is contained in:
Andreas Kling 2018-11-08 15:39:26 +01:00
parent 862f108cb5
commit 3b2dcd5929
8 changed files with 59 additions and 10 deletions
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9
Kernel/ProcFileSystem.cpp
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@ -49,7 +49,7 @@ ByteBuffer procfs$pid_vm(Process& process)
{
ProcessInspectionScope scope(process);
char* buffer;
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 80 + 4096, buffer);
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 160 + 4096, buffer);
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "BEGIN END SIZE NAME\n");
@ -59,12 +59,17 @@ ByteBuffer procfs$pid_vm(Process& process)
region->linearAddress.offset(region->size - 1).get(),
region->size,
region->name.characters());
ptr += ksprintf(ptr, "VMO: %s \"%s\" @ %x(%u)\n",
region->vmo().is_anonymous() ? "anonymous" : "file-backed",
region->vmo().name().characters(),
&region->vmo(),
region->vmo().retainCount());
for (size_t i = 0; i < region->vmo().page_count(); ++i) {
auto& physical_page = region->vmo().physical_pages()[i];
ptr += ksprintf(ptr, "P%x%s(%u) ",
physical_page ? physical_page->paddr().get() : 0,
region->cow_map.get(i) ? "!" : "",
physical_page->retain_count()
physical_page ? physical_page->retain_count() : 0
);
}
ptr += ksprintf(ptr, "\n");