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Region: Use dbg() instead of dbgprintf()

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Liav A 2020-02-24 16:40:42 +02:00 • committed by Andreas Kling
parent bb9fba1fdd
commit 24d2aeda8e
1 changed files with 22 additions and 27 deletions
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49
Kernel/VM/Region.cpp
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@ -90,11 +90,7 @@ NonnullOwnPtr<Region> Region::clone()
if (m_shared || vmobject().is_inode()) {
ASSERT(!m_stack);
#ifdef MM_DEBUG
dbgprintf("%s<%u> Region::clone(): sharing %s (V%p)\n",
Process::current->name().characters(),
Process::current->pid(),
m_name.characters(),
vaddr().get());
dbg() << Process::current->name().characters() << "<" << Process::current->pid() << "> Region::clone(): sharing " << m_name.characters() << " (V" << String::format("%p", vaddr().get()) << ")";
#endif
// Create a new region backed by the same VMObject.
auto region = Region::create_user_accessible(m_range, m_vmobject, m_offset_in_vmobject, m_name, m_access);
@ -104,14 +100,12 @@ NonnullOwnPtr<Region> Region::clone()
}
#ifdef MM_DEBUG
dbgprintf("%s<%u> Region::clone(): cowing %s (V%p)\n",
Process::current->name().characters(),
Process::current->pid(),
m_name.characters(),
vaddr().get());
// FIXME: If m_name.characters() is returning null pointer, the debug message will lead to a crash
// For now we use String::format() to mitigate that.
dbg() << Process::current->name().characters() << "<" << Process::current->pid() << "> Region::clone(): cowing " << String::format("%s", m_name.characters()) << " (V" << String::format("%p", vaddr().get()) << ")",
#endif
// Set up a COW region. The parent (this) region becomes COW as well!
ensure_cow_map().fill(true);
// Set up a COW region. The parent (this) region becomes COW as well!
ensure_cow_map().fill(true);
remap();
auto clone_region = Region::create_user_accessible(m_range, m_vmobject->clone(), m_offset_in_vmobject, m_name, m_access);
clone_region->ensure_cow_map();
@ -130,7 +124,7 @@ bool Region::commit()
{
InterruptDisabler disabler;
#ifdef MM_DEBUG
dbgprintf("MM: commit %u pages in Region %p (VMO=%p) at V%p\n", vmobject().page_count(), this, &vmobject(), vaddr().get());
dbg() << "MM: commit " << vmobject().page_count() << " pages in Region " << this << " (VMO=" << &vmobject() << ") at V" << String::format("%p", vaddr().get());
#endif
for (size_t i = 0; i < page_count(); ++i) {
if (!commit(i))
@ -144,7 +138,7 @@ bool Region::commit(size_t page_index)
ASSERT(vmobject().is_anonymous() || vmobject().is_purgeable());
InterruptDisabler disabler;
#ifdef MM_DEBUG
dbgprintf("MM: commit single page (%zu) in Region %p (VMO=%p) at V%p\n", page_index, vmobject().page_count(), this, &vmobject(), vaddr().get());
dbg() << "MM: commit single page" << String::format("%zu", page_index, vmobject().page_count()) << "in Region " << this << " (VMO=" << &vmobject() << ") at V" << String::format("%p", vaddr().get());
#endif
auto& vmobject_physical_page_entry = vmobject().physical_pages()[first_page_index() + page_index];
if (!vmobject_physical_page_entry.is_null() && !vmobject_physical_page_entry->is_shared_zero_page())
@ -300,7 +294,7 @@ void Region::unmap(ShouldDeallocateVirtualMemoryRange deallocate_range)
MM.flush_tlb(vaddr);
#ifdef MM_DEBUG
auto& physical_page = vmobject().physical_pages()[first_page_index() + i];
dbgprintf("MM: >> Unmapped V%p => P%p <<\n", vaddr.get(), physical_page ? physical_page->paddr().get() : 0);
dbg() << "MM: >> Unmapped V" << String::format("%p", vaddr.get()) << " => P" << String::format("%p", physical_page ? physical_page->paddr().get() : 0) << " <<";
#endif
}
if (deallocate_range == ShouldDeallocateVirtualMemoryRange::Yes)
@ -319,7 +313,7 @@ void Region::map(PageDirectory& page_directory)
set_page_directory(page_directory);
InterruptDisabler disabler;
#ifdef MM_DEBUG
dbgprintf("MM: Region::map() will map VMO pages %u - %u (VMO page count: %u)\n", first_page_index(), last_page_index(), vmobject().page_count());
dbg() << "MM: Region::map() will map VMO pages " << first_page_index() << " - " << last_page_index() << " (VMO page count: " << vmobject().page_count() << ")";
#endif
for (size_t page_index = 0; page_index < page_count(); ++page_index)
map_individual_page_impl(page_index);
@ -336,13 +330,13 @@ PageFaultResponse Region::handle_fault(const PageFault& fault)
auto page_index_in_region = page_index_from_address(fault.vaddr());
if (fault.type() == PageFault::Type::PageNotPresent) {
if (fault.is_read() && !is_readable()) {
dbgprintf("NP(non-readable) fault in Region{%p}[%u]\n", this, page_index_in_region);
dbg() << "NP(non-readable) fault in Region{" << this << "}[" << page_index_in_region << "]";
return PageFaultResponse::ShouldCrash;
}
if (vmobject().is_inode()) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("NP(inode) fault in Region{%p}[%u]\n", this, page_index_in_region);
dbg() << "NP(inode) fault in Region{" << this << "}[" << page_index_in_region << "]";
#endif
return handle_inode_fault(page_index_in_region);
}
@ -360,11 +354,11 @@ PageFaultResponse Region::handle_fault(const PageFault& fault)
ASSERT(fault.type() == PageFault::Type::ProtectionViolation);
if (fault.access() == PageFault::Access::Write && is_writable() && should_cow(page_index_in_region)) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("PV(cow) fault in Region{%p}[%u]\n", this, page_index_in_region);
dbg() << "PV(cow) fault in Region{" << this << "}[" << page_index_in_region << "]";
#endif
if (vmobject().physical_pages()[first_page_index() + page_index_in_region]->is_shared_zero_page()) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("NP(zero) fault in Region{%p}[%u]\n", this, page_index_in_region);
dbg() << "NP(zero) fault in Region{" << this << "}[" << page_index_in_region << "]";
#endif
return handle_zero_fault(page_index_in_region);
}
@ -387,7 +381,7 @@ PageFaultResponse Region::handle_zero_fault(size_t page_index_in_region)
if (!vmobject_physical_page_entry.is_null() && !vmobject_physical_page_entry->is_shared_zero_page()) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("MM: zero_page() but page already present. Fine with me!\n");
dbg() << "MM: zero_page() but page already present. Fine with me!";
#endif
remap_page(page_index_in_region);
return PageFaultResponse::Continue;
@ -403,7 +397,8 @@ PageFaultResponse Region::handle_zero_fault(size_t page_index_in_region)
}
#ifdef PAGE_FAULT_DEBUG
dbgprintf(" >> ZERO P%p\n", physical_page->paddr().get());
dbg() << " >> ZERO P\n"
<< String::format("%p", physical_page->paddr().get());
#endif
vmobject_physical_page_entry = move(physical_page);
remap_page(page_index_in_region);
@ -416,7 +411,7 @@ PageFaultResponse Region::handle_cow_fault(size_t page_index_in_region)
auto& vmobject_physical_page_entry = vmobject().physical_pages()[first_page_index() + page_index_in_region];
if (vmobject_physical_page_entry->ref_count() == 1) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf(" >> It's a COW page but nobody is sharing it anymore. Remap r/w\n");
dbg() << " >> It's a COW page but nobody is sharing it anymore. Remap r/w";
#endif
set_should_cow(page_index_in_region, false);
remap_page(page_index_in_region);
@ -427,7 +422,7 @@ PageFaultResponse Region::handle_cow_fault(size_t page_index_in_region)
Thread::current->did_cow_fault();
#ifdef PAGE_FAULT_DEBUG
dbgprintf(" >> It's a COW page and it's time to COW!\n");
dbg() << " >> It's a COW page and it's time to COW!";
#endif
auto physical_page_to_copy = move(vmobject_physical_page_entry);
auto physical_page = MM.allocate_user_physical_page(MemoryManager::ShouldZeroFill::No);
@ -438,7 +433,7 @@ PageFaultResponse Region::handle_cow_fault(size_t page_index_in_region)
u8* dest_ptr = MM.quickmap_page(*physical_page);
const u8* src_ptr = vaddr().offset(page_index_in_region * PAGE_SIZE).as_ptr();
#ifdef PAGE_FAULT_DEBUG
dbgprintf(" >> COW P%p <- P%p\n", physical_page->paddr().get(), physical_page_to_copy->paddr().get());
dbg() << " >> COW P" << String::format("%p", physical_page->paddr().get()) << " <- P" << String::format("%p", physical_page_to_copy->paddr().get());
#endif
copy_from_user(dest_ptr, src_ptr, PAGE_SIZE);
vmobject_physical_page_entry = move(physical_page);
@ -466,7 +461,7 @@ PageFaultResponse Region::handle_inode_fault(size_t page_index_in_region)
if (!vmobject_physical_page_entry.is_null()) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("MM: page_in_from_inode() but page already present. Fine with me!\n");
dbg() << ("MM: page_in_from_inode() but page already present. Fine with me!");
#endif
remap_page(page_index_in_region);
return PageFaultResponse::Continue;
@ -476,7 +471,7 @@ PageFaultResponse Region::handle_inode_fault(size_t page_index_in_region)
Thread::current->did_inode_fault();
#ifdef MM_DEBUG
dbgprintf("MM: page_in_from_inode ready to read from inode\n");
dbg() << "MM: page_in_from_inode ready to read from inode";
#endif
sti();
u8 page_buffer[PAGE_SIZE];