From 518bd9053ae137b8f1aedfe3b299f68f0ff603c4 Mon Sep 17 00:00:00 2001
From: kalidwehbe <157623205+kalidwehbe@users.noreply.github.com>
Date: Thu, 6 Nov 2025 14:15:53 -0500
Subject: [PATCH] Update interrupts.cpp

---
 interrupts.cpp | 99 +++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 93 insertions(+), 6 deletions(-)

diff --git a/interrupts.cpp b/interrupts.cpp
index e2f2722..e68fca9 100644
--- a/interrupts.cpp
+++ b/interrupts.cpp
@@ -49,7 +49,34 @@ std::tuple<std::string, std::string, int> simulate_trace(std::vector<std::string
             current_time = time;
 
             ///////////////////////////////////////////////////////////////////////////////////////////
-            //Add your FORK output here
+            execution += std::to_string(current_time) + ", 1, switch to kernel mode //fork encountered, "
+                         + std::to_string(wait_queue.size() + 1) + " processes in PCB\n";
+            current_time += 1;
+            
+            execution += std::to_string(current_time) + ", 10, context saved\n";
+            current_time += 10;
+            
+            execution += std::to_string(current_time) + ", 1, find vector 2 in memory position 0x0004\n";
+            current_time += 1;
+            
+            execution += std::to_string(current_time) + ", 1, load address 0X0695 into the PC\n";
+            current_time += 1;
+            
+            execution += std::to_string(current_time) + ", 17, cloning the PCB\n";
+            current_time += 17;
+            
+            execution += std::to_string(current_time) + ", 0, scheduler called\n";
+            execution += std::to_string(current_time) + ", 1, IRET\n";
+            current_time += 1;
+            
+            // Create child PCB and put parent in wait queue
+            PCB child(current.PID + 1, current.PID, current.program_name, current.size, current.partition_number);
+            wait_queue.push_back(current);  // parent goes to wait queue
+            current = child;                // child runs immediately
+            
+            // Snapshot system status
+            system_status += print_PCB(current, wait_queue);
+
 
 
 
@@ -90,7 +117,15 @@ std::tuple<std::string, std::string, int> simulate_trace(std::vector<std::string
             i = parent_index;
 
             ///////////////////////////////////////////////////////////////////////////////////////////
-            //With the child's trace, run the child (HINT: think recursion)
+            auto [child_exec, child_status, child_time] = simulate_trace(child_trace, current_time, vectors, delays, external_files, current, wait_queue);
+            execution += child_exec;
+            system_status += child_status;
+            current_time = child_time;
+            
+            // After child finishes, restore parent
+            current = wait_queue.back();
+            wait_queue.pop_back();
+
 
 
 
@@ -103,8 +138,43 @@ std::tuple<std::string, std::string, int> simulate_trace(std::vector<std::string
             execution += intr;
 
             ///////////////////////////////////////////////////////////////////////////////////////////
-            //Add your EXEC output here
-
+            // EXEC ISR: load new program into memory and log
+            execution += std::to_string(current_time) + ", 1, switch to kernel mode //exec encountered\n";
+            current_time += 1;
+            
+            execution += std::to_string(current_time) + ", 10, context saved\n";
+            current_time += 10;
+            
+            execution += std::to_string(current_time) + ", 1, find vector 3 in memory position 0x0006\n";
+            current_time += 1;
+            
+            execution += std::to_string(current_time) + ", 1, load address 0X042B into the PC\n";
+            current_time += 1;
+            
+            unsigned int prog_size = get_size(program_name, external_files);
+            current.program_name = program_name;
+            current.size = prog_size;
+            
+            execution += std::to_string(current_time) + ", " + std::to_string(duration_intr) + ", Program is " + std::to_string(prog_size) + " Mb large\n";
+            current_time += duration_intr;
+            
+            execution += std::to_string(current_time) + ", " + std::to_string(prog_size * 15) + ", loading program into memory\n";
+            current_time += prog_size * 15;
+            
+            execution += std::to_string(current_time) + ", 3, marking partition as occupied\n";
+            current_time += 3;
+            
+            execution += std::to_string(current_time) + ", 6, updating PCB\n";
+            current_time += 6;
+            
+            execution += std::to_string(current_time) + ", 0, scheduler called\n";
+            execution += std::to_string(current_time) + ", 1, IRET\n";
+            current_time += 1;
+            
+            // Snapshot PCB
+            system_status += print_PCB(current, wait_queue);
+            
+            
 
 
             ///////////////////////////////////////////////////////////////////////////////////////////
@@ -119,7 +189,24 @@ std::tuple<std::string, std::string, int> simulate_trace(std::vector<std::string
             }
 
             ///////////////////////////////////////////////////////////////////////////////////////////
-            //With the exec's trace (i.e. trace of external program), run the exec (HINT: think recursion)
+            // Run child or external program recursively
+            std::ifstream prog_file(program_name + ".txt");
+            std::vector<std::string> prog_traces;
+            std::string line;
+            while (std::getline(prog_file, line)) prog_traces.push_back(line);
+            
+            auto [prog_exec, prog_status, prog_time] = simulate_trace(prog_traces, current_time, vectors, delays, external_files, current, wait_queue);
+            
+            execution += prog_exec;
+            system_status += prog_status;
+            current_time = prog_time;
+            
+            // After child finishes, restore parent if needed
+            if (!wait_queue.empty()) {
+                current = wait_queue.back();
+                wait_queue.pop_back();
+            }
+
 
 
 
@@ -156,7 +243,7 @@ int main(int argc, char** argv) {
     std::vector<PCB> wait_queue;
 
     /******************ADD YOUR VARIABLES HERE*************************/
-
+    int child_counter = 0;
 
     /******************************************************************/