Kernel+ProcessManager: Show per-process syscall counts.

Added a simple syscall counter to the /proc/all contents. :^)

Kernel/FileSystem/ProcFS.cpp

@@ -579,7 +579,7 @@ ByteBuffer procfs$all(InodeIdentifier)
     auto processes = Process::all_processes();
     StringBuilder builder(processes.size() * 80);
     auto build_process_line = [&builder] (Process* process) {
-        builder.appendf("%u,%u,%u,%u,%u,%u,%u,%s,%u,%u,%s,%s,%u,%u,%u,%u,%s\n",
+        builder.appendf("%u,%u,%u,%u,%u,%u,%u,%s,%u,%u,%s,%s,%u,%u,%u,%u,%s,%u\n",
             process->pid(),
             process->main_thread().times_scheduled(), // FIXME(Thread): Bill all scheds to the process
             process->tty() ? process->tty()->pgid() : 0,
@@ -596,7 +596,8 @@ ByteBuffer procfs$all(InodeIdentifier)
             process->amount_resident(),
             process->amount_shared(),
             process->main_thread().ticks(), // FIXME(Thread): Bill all ticks to the process
-            to_string(process->priority())
+            to_string(process->priority()),
+            process->syscall_count()
         );
     };
     build_process_line(Scheduler::colonel());

Kernel/Process.h

@@ -247,6 +247,9 @@ public:
 
     Lock& big_lock() { return m_big_lock; }
 
+    unsigned syscall_count() const { return m_syscall_count; }
+    void did_syscall() { ++m_syscall_count; }
+
 private:
     friend class MemoryManager;
     friend class Scheduler;
@@ -322,6 +325,8 @@ private:
 
     int m_next_tid { 0 };
 
+    unsigned m_syscall_count { 0 };
+
     Lock m_big_lock;
 };
 

Kernel/Syscall.cpp

@@ -52,6 +52,8 @@ int sync()
 
 static dword handle(RegisterDump& regs, dword function, dword arg1, dword arg2, dword arg3)
 {
+    current->process().did_syscall();
+
     ASSERT_INTERRUPTS_ENABLED();
     switch (function) {
     case Syscall::SC_yield: