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Implement /proc/PID/vm.

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Refactored SyntheticFileSystem to maintain an arbitrary directory structure.
ProcFileSystem creates a directory entry in /proc for each new process.
This commit is contained in:
Andreas Kling 2018-10-26 17:42:12 +02:00
parent 10347b9ae8
commit a32b3a3ddf
Notes: sideshowbarker 2024-07-19 18:38:09 +09:00
15 changed files with 217 additions and 39 deletions
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49
Kernel/ProcFileSystem.cpp
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@ -1,6 +1,14 @@
#include "ProcFileSystem.h"
#include "Task.h"
static ProcFileSystem* s_the;
ProcFileSystem& ProcFileSystem::the()
{
ASSERT(s_the);
return *s_the;
}
RetainPtr<ProcFileSystem> ProcFileSystem::create()
{
return adopt(*new ProcFileSystem);
@ -8,15 +16,56 @@ RetainPtr<ProcFileSystem> ProcFileSystem::create()
ProcFileSystem::ProcFileSystem()
{
s_the = this;
}
ProcFileSystem::~ProcFileSystem()
{
}
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] {
InterruptDisabler disabler;
char* buffer;
auto stringImpl = StringImpl::createUninitialized(80 + task.regionCount() * 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());
}
*ptr = '\0';
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
}), 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);
}
bool ProcFileSystem::initialize()
{
SyntheticFileSystem::initialize();
auto d = addFile(createDirectory("sys"));
addFile(createGeneratedFile("summary", [] {
InterruptDisabler disabler;
auto tasks = Task::allTasks();