mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-26 19:22:30 -05:00
3a901ae36d
We no longer disable interrupts around the whole affair. Since MM manages per-process data structures, this works quite smoothly now. Only procfs had to be tweaked with an InterruptDisabler.
244 lines
8.3 KiB
C++
244 lines
8.3 KiB
C++
#include "ProcFileSystem.h"
|
|
#include "Process.h"
|
|
#include <VirtualFileSystem/VirtualFileSystem.h>
|
|
#include "system.h"
|
|
#include "MemoryManager.h"
|
|
#include "StdLib.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$pid_fds(Process& process)
|
|
{
|
|
ProcessInspectionScope scope(process);
|
|
char* buffer;
|
|
auto stringImpl = StringImpl::createUninitialized(process.number_of_open_file_descriptors() * 80, buffer);
|
|
memset(buffer, 0, stringImpl->length());
|
|
char* ptr = buffer;
|
|
for (size_t i = 0; i < process.max_open_file_descriptors(); ++i) {
|
|
auto* handle = process.file_descriptor(i);
|
|
if (!handle)
|
|
continue;
|
|
ptr += ksprintf(ptr, "% 3u %s\n", i, handle->absolute_path().characters());
|
|
}
|
|
*ptr = '\0';
|
|
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
|
|
}
|
|
|
|
ByteBuffer procfs$pid_vm(Process& process)
|
|
{
|
|
ProcessInspectionScope scope(process);
|
|
char* buffer;
|
|
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 80 + 80 + process.subregionCount() * 80, buffer);
|
|
memset(buffer, 0, stringImpl->length());
|
|
char* ptr = buffer;
|
|
ptr += ksprintf(ptr, "BEGIN END SIZE NAME\n");
|
|
for (auto& region : process.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 (process.subregionCount()) {
|
|
ptr += ksprintf(ptr, "\nREGION OFFSET BEGIN END SIZE NAME\n");
|
|
for (auto& subregion : process.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$pid_stack(Process& process)
|
|
{
|
|
ProcessInspectionScope scope(process);
|
|
OtherProcessPagingScope pagingScope(process);
|
|
struct RecognizedSymbol {
|
|
dword address;
|
|
const KSym* ksym;
|
|
};
|
|
Vector<RecognizedSymbol> recognizedSymbols;
|
|
if (auto* eipKsym = ksymbolicate(process.tss().eip))
|
|
recognizedSymbols.append({ process.tss().eip, eipKsym });
|
|
for (dword* stackPtr = (dword*)process.framePtr(); process.isValidAddressForKernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
|
|
dword retaddr = stackPtr[1];
|
|
if (auto* ksym = ksymbolicate(retaddr))
|
|
recognizedSymbols.append({ retaddr, ksym });
|
|
}
|
|
size_t bytesNeeded = 0;
|
|
for (auto& symbol : recognizedSymbols) {
|
|
bytesNeeded += symbol.ksym->name.length() + 8 + 16;
|
|
}
|
|
auto buffer = ByteBuffer::createUninitialized(bytesNeeded);
|
|
char* bufptr = (char*)buffer.pointer();
|
|
|
|
for (auto& symbol : recognizedSymbols) {
|
|
// FIXME: This doesn't actually create a file!
|
|
unsigned offset = symbol.address - symbol.ksym->address;
|
|
bufptr += ksprintf(bufptr, "%p %s +%u\n", symbol.address, symbol.ksym->name.characters(), offset);
|
|
}
|
|
buffer.trim(bufptr - (char*)buffer.pointer());
|
|
return buffer;
|
|
}
|
|
|
|
ByteBuffer procfs$pid_exe(Process& process)
|
|
{
|
|
ProcessInspectionScope scope(process);
|
|
auto inode = process.executableInode();
|
|
return VirtualFileSystem::the().absolutePath(inode).toByteBuffer();
|
|
}
|
|
|
|
void ProcFileSystem::addProcess(Process& process)
|
|
{
|
|
InterruptDisabler disabler;
|
|
char buf[16];
|
|
ksprintf(buf, "%d", process.pid());
|
|
auto dir = addFile(createDirectory(buf));
|
|
m_pid2inode.set(process.pid(), dir.index());
|
|
addFile(createGeneratedFile("vm", [&process] { return procfs$pid_vm(process); }), dir.index());
|
|
addFile(createGeneratedFile("stack", [&process] { return procfs$pid_stack(process); }), dir.index());
|
|
addFile(createGeneratedFile("fds", [&process] { return procfs$pid_fds(process); }), dir.index());
|
|
if (process.executableInode().isValid())
|
|
addFile(createGeneratedFile("exe", [&process] { return procfs$pid_exe(process); }, 00120777), dir.index());
|
|
}
|
|
|
|
void ProcFileSystem::removeProcess(Process& process)
|
|
{
|
|
InterruptDisabler disabler;
|
|
auto pid = process.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$kmalloc()
|
|
{
|
|
InterruptDisabler disabler;
|
|
auto buffer = ByteBuffer::createUninitialized(256);
|
|
char* ptr = (char*)buffer.pointer();
|
|
ptr += ksprintf(ptr, "eternal: %u\npage-aligned: %u\nallocated: %u\nfree: %u\n", kmalloc_sum_eternal, sum_alloc, sum_free);
|
|
buffer.trim(ptr - (char*)buffer.pointer());
|
|
return buffer;
|
|
}
|
|
|
|
static const char* toString(Process::State state)
|
|
{
|
|
switch (state) {
|
|
case Process::Invalid: return "Invalid";
|
|
case Process::Runnable: return "Runnable";
|
|
case Process::Running: return "Running";
|
|
case Process::Terminated: return "Term";
|
|
case Process::Crashing: return "Crash";
|
|
case Process::Exiting: return "Exit";
|
|
case Process::BlockedSleep: return "Sleep";
|
|
case Process::BlockedWait: return "Wait";
|
|
case Process::BlockedRead: return "Read";
|
|
case Process::BeingInspected: return "Inspect";
|
|
}
|
|
ASSERT_NOT_REACHED();
|
|
return nullptr;
|
|
}
|
|
|
|
ByteBuffer procfs$summary()
|
|
{
|
|
InterruptDisabler disabler;
|
|
auto processes = Process::allProcesses();
|
|
auto buffer = ByteBuffer::createUninitialized(processes.size() * 256);
|
|
char* ptr = (char*)buffer.pointer();
|
|
ptr += ksprintf(ptr, "PID OWNER STATE PPID NSCHED FDS TTY NAME\n");
|
|
for (auto* process : processes) {
|
|
ptr += ksprintf(ptr, "% 5u % 4u % 8s % 5u % 10u % 3u % 4s %s\n",
|
|
process->pid(),
|
|
process->uid(),
|
|
toString(process->state()),
|
|
process->parentPID(),
|
|
process->timesScheduled(),
|
|
process->number_of_open_file_descriptors(),
|
|
process->tty() ? strrchr(process->tty()->ttyName().characters(), '/') + 1 : "n/a",
|
|
process->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";
|
|
}
|