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#include "ProcFileSystem.h"
#include "Task.h"
#include <VirtualFileSystem/VirtualFileSystem.h>
#include "system.h"
#include "MemoryManager.h"
static ProcFileSystem* s_the;
ProcFileSystem& ProcFileSystem::the()
{
ASSERT(s_the);
return *s_the;
}
RetainPtr<ProcFileSystem> ProcFileSystem::create()
{
return adopt(*new ProcFileSystem);
}
ProcFileSystem::ProcFileSystem()
{
s_the = this;
}
ProcFileSystem::~ProcFileSystem()
{
}
ByteBuffer procfs$pid_vm(const Task& task)
{
InterruptDisabler disabler;
char* buffer;
auto stringImpl = StringImpl::createUninitialized(80 + task.regionCount() * 80 + 80 + task.subregionCount() * 80, buffer);
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "BEGIN END SIZE NAME\n");
for (auto& region : task.regions()) {
ptr += ksprintf(ptr, "%x -- %x %x %s\n",
region->linearAddress.get(),
region->linearAddress.offset(region->size - 1).get(),
region->size,
region->name.characters());
}
if (task.subregionCount()) {
ptr += ksprintf(ptr, "\nREGION OFFSET BEGIN END SIZE NAME\n");
for (auto& subregion : task.subregions()) {
ptr += ksprintf(ptr, "%x %x %x -- %x %x %s\n",
subregion->region->linearAddress.get(),
subregion->offset,
subregion->linearAddress.get(),
subregion->linearAddress.offset(subregion->size - 1).get(),
subregion->size,
subregion->name.characters());
}
}
*ptr = '\0';
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
}
ByteBuffer procfs$pid_stack(Task& task)
{
InterruptDisabler disabler;
if (current != &task) {
MM.unmapRegionsForTask(*current);
MM.mapRegionsForTask(task);
}
struct RecognizedSymbol {
dword address;
const KSym* ksym;
};
Vector<RecognizedSymbol> recognizedSymbols;
if (auto* eipKsym = ksymbolicate(task.tss().eip))
recognizedSymbols.append({ task.tss().eip, eipKsym });
for (dword* stackPtr = (dword*)task.framePtr(); task.isValidAddressForKernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
dword retaddr = stackPtr[1];
if (auto* ksym = ksymbolicate(retaddr))
recognizedSymbols.append({ retaddr, ksym });
}
size_t bytesNeeded = 0;
for (auto& symbol : recognizedSymbols) {
bytesNeeded += symbol.ksym->name.length() + 8 + 16;
}
auto buffer = ByteBuffer::createUninitialized(bytesNeeded);
char* bufptr = (char*)buffer.pointer();
for (auto& symbol : recognizedSymbols) {
// FIXME: This doesn't actually create a file!
unsigned offset = symbol.address - symbol.ksym->address;
bufptr += ksprintf(bufptr, "%p %s +%u\n", symbol.address, symbol.ksym->name.characters(), offset);
}
buffer.trim(bufptr - (char*)buffer.pointer());
if (current != &task) {
MM.unmapRegionsForTask(task);
MM.mapRegionsForTask(*current);
}
return buffer;
}
ByteBuffer procfs$pid_exe(Task& task)
{
InodeIdentifier inode;
{
InterruptDisabler disabler;
inode = task.executableInode();
}
return VirtualFileSystem::the().absolutePath(inode).toByteBuffer();
}
void ProcFileSystem::addProcess(Task& task)
{
ASSERT_INTERRUPTS_DISABLED();
char buf[16];
ksprintf(buf, "%d", task.pid());
auto dir = addFile(createDirectory(buf));
m_pid2inode.set(task.pid(), dir.index());
addFile(createGeneratedFile("vm", [&task] { return procfs$pid_vm(task); }), dir.index());
addFile(createGeneratedFile("stack", [&task] { return procfs$pid_stack(task); }), dir.index());
if (task.executableInode().isValid())
addFile(createGeneratedFile("exe", [&task] { return procfs$pid_exe(task); }, 00120777), dir.index());
}
void ProcFileSystem::removeProcess(Task& task)
{
ASSERT_INTERRUPTS_DISABLED();
auto pid = task.pid();
auto it = m_pid2inode.find(pid);
ASSERT(it != m_pid2inode.end());
bool success = removeFile((*it).value);
ASSERT(success);
m_pid2inode.remove(pid);
}
ByteBuffer procfs$mm()
{
InterruptDisabler disabler;
size_t zonePageCount = 0;
for (auto* zone : MM.m_zones)
zonePageCount += zone->m_pages.size();
auto buffer = ByteBuffer::createUninitialized(1024 + 80 * MM.m_zones.size() + zonePageCount * 10);
char* ptr = (char*)buffer.pointer();
ptr += ksprintf(ptr, "Zone count: %u\n", MM.m_zones.size());
ptr += ksprintf(ptr, "Free physical pages: %u\n", MM.m_freePages.size());
for (auto* zone : MM.m_zones) {
ptr += ksprintf(ptr, "Zone %p size: %u\n ", zone, zone->size());
for (auto page : zone->m_pages)
ptr += ksprintf(ptr, "%x ", page);
ptr += ksprintf(ptr, "\n");
}
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}
ByteBuffer procfs$mounts()
{
InterruptDisabler disabler;
auto buffer = ByteBuffer::createUninitialized(VirtualFileSystem::the().mountCount() * 80);
char* ptr = (char*)buffer.pointer();
VirtualFileSystem::the().forEachMount([&ptr] (auto& mount) {
auto& fs = mount.fileSystem();
ptr += ksprintf(ptr, "%s @ ", fs.className());
if (!mount.host().isValid())
ptr += ksprintf(ptr, "/\n", fs.className());
else
ptr += ksprintf(ptr, "%u:%u\n", mount.host().fileSystemID(), mount.host().index());
});
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}
ByteBuffer procfs$kmalloc()
{
InterruptDisabler disabler;
auto buffer = ByteBuffer::createUninitialized(128);
char* ptr = (char*)buffer.pointer();
ptr += ksprintf(ptr, "alloc: %u\nfree: %u\n", sum_alloc, sum_free);
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}
static const char* toString(Task::State state)
{
switch (state) {
case Task::Invalid: return "Invalid";
case Task::Runnable: return "Runnable";
case Task::Running: return "Running";
case Task::Terminated: return "Term";
case Task::Crashing: return "Crash";
case Task::Exiting: return "Exit";
case Task::BlockedSleep: return "Sleep";
case Task::BlockedWait: return "Wait";
case Task::BlockedRead: return "Read";
}
ASSERT_NOT_REACHED();
return nullptr;
}
ByteBuffer procfs$summary()
{
InterruptDisabler disabler;
auto tasks = Task::allTasks();
auto buffer = ByteBuffer::createUninitialized(tasks.size() * 256);
char* ptr = (char*)buffer.pointer();
ptr += ksprintf(ptr, "PID OWNER STATE PPID NSCHED FDS NAME\n");
for (auto* task : tasks) {
ptr += ksprintf(ptr, "% 5u % 4u % 8s % 5u % 10u % 3u %s\n",
task->pid(),
task->uid(),
toString(task->state()),
task->parentPID(),
task->timesScheduled(),
task->fileHandleCount(),
task->name().characters());
}
*ptr = '\0';
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
}
bool ProcFileSystem::initialize()
{
SyntheticFileSystem::initialize();
addFile(createGeneratedFile("mm", procfs$mm));
addFile(createGeneratedFile("mounts", procfs$mounts));
addFile(createGeneratedFile("kmalloc", procfs$kmalloc));
addFile(createGeneratedFile("summary", procfs$summary));
return true;
}
const char* ProcFileSystem::className() const
{
return "procfs";
}
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