From 2d5df34234d02ba6bd0e9bac5d7c0ab5d659c2d3 Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Thu, 26 Mar 2020 12:30:32 +0900
Subject: [PATCH] [gamecode] Add VM enter/exit events

And rename prd_exit to prd_terminate (the idea is the host will
terminate the VM). This makes it possible for the debugger to pause the
VM before any code, even a builtin function, is executed. Breaks the
debugger source window, but only because it's not updating on file
change (I think).
---
 include/QF/progs.h      | 4 +++-
 libs/gamecode/pr_exec.c | 7 +++++++
 ruamoko/qwaq/main.c     | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/QF/progs.h b/include/QF/progs.h
index c393be5a5..c08bf12d5 100644
--- a/include/QF/progs.h
+++ b/include/QF/progs.h
@@ -1710,7 +1710,9 @@ typedef enum {
 	prd_trace,
 	prd_breakpoint,
 	prd_watchpoint,
-	prd_exit,			// not sent by VM
+	prd_subenter,
+	prd_subexit,		// current invocation of PR_ExecuteProgram finished
+	prd_terminate,		// not sent by VM
 	prd_runerror,
 	prd_error,			// lower level error thann prd_runerror
 } prdebug_t;
diff --git a/libs/gamecode/pr_exec.c b/libs/gamecode/pr_exec.c
index 425ec5f64..b0a7cb820 100644
--- a/libs/gamecode/pr_exec.c
+++ b/libs/gamecode/pr_exec.c
@@ -458,6 +458,10 @@ PR_ExecuteProgram (progs_t *pr, func_t fnum)
 	Sys_PushSignalHook (signal_hook, pr);
 	Sys_PushErrorHandler (error_handler, pr);
 
+	if (pr->debug_handler) {
+		pr->debug_handler (prd_subenter, &fnum, pr->debug_data);
+	}
+
 	if (!PR_CallFunction (pr, fnum)) {
 		// called a builtin instead of progs code
 		goto exit_program;
@@ -1723,6 +1727,9 @@ op_call:
 		}
 	}
 exit_program:
+	if (pr->debug_handler) {
+		pr->debug_handler (prd_subexit, 0, pr->debug_data);
+	}
 	pr->pr_argc = 0;
 	Sys_PopErrorHandler ();
 	Sys_PopSignalHook ();
diff --git a/ruamoko/qwaq/main.c b/ruamoko/qwaq/main.c
index 8c9650786..bbd66bac1 100644
--- a/ruamoko/qwaq/main.c
+++ b/ruamoko/qwaq/main.c
@@ -233,7 +233,7 @@ run_progs (void *data)
 	PR_ExecuteProgram (thread->pr, thread->main_func);
 	PR_PopFrame (thread->pr);
 	if (thread->pr->debug_handler) {
-		thread->pr->debug_handler (prd_exit, 0, thread->pr->debug_data);
+		thread->pr->debug_handler (prd_terminate, 0, thread->pr->debug_data);
 	}
 	thread->return_code = R_INT (thread->pr);
 	return thread;