fixed a hang bug

Author: zibai.wang

src/acl_printf.cpp

@@ -769,15 +769,27 @@ static void l_dump_printf_buffer(cl_event event, cl_kernel kernel,
     hal_dma_fn = acl_get_hal()->copy_globalmem_to_hostmem;
   }
 
-  void* b = (void*)((char*)kernel->printf_device_buffer->block_allocation->range.begin + kernel->processed_buffer_size);
-  // hal_dma_fn(NULL, b, buffer, size - 64);
-  hal_dma_fn(NULL, b, buffer, size - kernel->processed_buffer_size);
+  // void* b = (void*)((char*)kernel->printf_device_buffer->block_allocation->range.begin + kernel->processed_buffer_size);
+  // // hal_dma_fn(NULL, b, buffer, size - 64);
+
   //hal_dma_fn(NULL, b, buffer, size - 64);
   // test is giving segfault if I use size - 64, because test doesn't have that much data
   // What if I don't use -64
+  printf("total size is %d \n", size);
+  printf("kernel prcessed buffer size is %d \n", kernel->processed_buffer_size);
+
+  void* unprocessed_begin = (void*)((char*)kernel->printf_device_buffer->block_allocation->range.begin + kernel->processed_buffer_size);
+  printf("Hang may begin here?? \n");
+  if (size > (unsigned int) kernel->processed_buffer_size){
+    printf("ZIBAI has something to print! \n");
+    hal_dma_fn(NULL, unprocessed_begin, buffer, size - kernel->processed_buffer_size);
+  } else{
+    printf("Zibai Added, nothing to print \n");
+    return;
+  }
+
 
-  // hal_dma_fn(NULL, kernel->printf_device_buffer->block_allocation->range.begin,
-  //            buffer, size);
+  //hal_dma_fn(NULL, kernel->printf_device_buffer->block_allocation->range.begin, buffer, size);
 
 #ifdef DEBUG
   if (debug_mode > 0) {
@@ -1025,7 +1037,7 @@ void acl_process_printf_buffer(void *user_data, acl_device_op_t *op) {
     // buffer again.
     // Zibai Testing
     if (op->info.debug_dump == 1){
-      kernel->processed_buffer_size += num_bytes;
+      kernel->processed_buffer_size += num_bytes; // TODO, Fix this, should be += processed bytes
     } else{
       // Full dump, clear this global var
       kernel->processed_buffer_size = 0;