diff --git a/src/rvprof_internal.h b/src/rvprof_internal.h
index 1174808..767b449 100644
--- a/src/rvprof_internal.h
+++ b/src/rvprof_internal.h
@@ -98,6 +98,33 @@ typedef struct {
     char* program_name;
 } rvprof_config_t;
 
+// global context
+typedef struct{
+    rvprof_config_t config;
+    
+    // cycle counter info
+    int use_cycles;
+    int cycles_avaiable;
+
+    // dynamic arrays
+    region_array_t regions;
+    stack_info_array_t stacks;
+    symbol_array_t symbols;
+
+    // state
+    int initialized;
+    int auto_initialized;
+    int symbols_loaded;
+    int stack_ptr;
+    FILE* output_file;
+
+    // statistics
+    uint64_t total_program_tiem;
+    uint64_t total_program_cycles;
+    size_t total_memory_allocated;
+    
+} rvprof_context_t;
+
 #ifdef __cplusplus
 }
 #endif