From 71d4ba21f2eed560dda65e1623648d7143a516d9 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Fri, 16 Sep 2016 11:58:31 +0300
Subject: [PATCH] Added a tick-counting debugger command

---
 Core/debugger.c | 16 ++++++++++++++++
 Core/gb.h       |  3 +++
 Core/timing.c   |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/Core/debugger.c b/Core/debugger.c
index ca0c367..a689ea7 100644
--- a/Core/debugger.c
+++ b/Core/debugger.c
@@ -1185,6 +1185,21 @@ static bool backtrace(GB_gameboy_t *gb, char *arguments, const debugger_command_
     return true;
 }
 
+static bool ticks(GB_gameboy_t *gb, char *arguments, const debugger_command_t *command)
+{
+    STOPPED_ONLY
+
+    if (strlen(lstrip(arguments))) {
+        print_usage(gb, command);
+        return true;
+    }
+
+    GB_log(gb, "Ticks: %lu. (Resetting)\n", gb->debugger_ticks);
+    gb->debugger_ticks = 0;
+
+    return true;
+}
+
 static bool help(GB_gameboy_t *gb, char *arguments, const debugger_command_t *command);
 
 #define HELP_NEWLINE "\n            "
@@ -1198,6 +1213,7 @@ static const debugger_command_t commands[] = {
     {"backtrace", 2, backtrace, "Display the current call stack"},
     {"bt", 2, }, /* Alias */
     {"sld", 3, stack_leak_detection, "Like finish, but stops if a stack leak is detected. (Experimental)"},
+    {"ticks", 2, ticks, "Display the number of CPU ticks since the last time 'ticks' was used. "},
     {"registers", 1, registers, "Print values of processor registers and other important registers"},
     {"cartridge", 2, mbc, "Displays information about the MBC and cartridge"},
     {"mbc", 3, }, /* Alias */
diff --git a/Core/gb.h b/Core/gb.h
index a2a7d8b..b1326f8 100644
--- a/Core/gb.h
+++ b/Core/gb.h
@@ -409,6 +409,9 @@ typedef struct GB_gameboy_s {
     GB_symbol_map_t *bank_symbols[0x200];
     GB_reversed_symbol_map_t reversed_symbol_map;
 
+    /* Ticks command */
+    unsigned long debugger_ticks;
+
     /* Misc */
     bool turbo;
     bool turbo_dont_skip;
diff --git a/Core/timing.c b/Core/timing.c
index 726fb36..b31826b 100644
--- a/Core/timing.c
+++ b/Core/timing.c
@@ -53,6 +53,8 @@ void GB_advance_cycles(GB_gameboy_t *gb, uint8_t cycles)
         }
     }
 
+    gb->debugger_ticks += cycles;
+
     if (gb->cgb_double_speed) {
         cycles >>=1;
     }