backtrace: Print backtrace in assert() and panic()

When any of these functions is called the backtrace will be printed to
the console.

Change-Id: Id60842df824b320c485a9323ed6b80600f4ebe35
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

include/common/debug.h

@@ -27,7 +27,9 @@
 
 #ifndef __ASSEMBLY__
 #include <cdefs.h>
+#include <console.h>
 #include <stdarg.h>
+#include <stdbool.h>
 #include <stdio.h>
 
 /*
@@ -90,7 +92,13 @@ void backtrace(const char *cookie);
 #endif
 
 void __dead2 do_panic(void);
-#define panic()	do_panic()
+
+#define panic()				\
+	do {				\
+		backtrace(__func__);	\
+		(void)console_flush();	\
+		do_panic();		\
+	} while (false)
 
 /* Function called when stack protection check code detects a corrupted stack */
 void __dead2 __stack_chk_fail(void);

lib/libc/assert.c

@@ -20,19 +20,23 @@
 void __assert(const char *file, unsigned int line, const char *assertion)
 {
 	printf("ASSERT: %s:%d:%s\n", file, line, assertion);
-	console_flush();
+	backtrace("assert");
+	(void)console_flush();
 	plat_panic_handler();
 }
 #elif PLAT_LOG_LEVEL_ASSERT >= LOG_LEVEL_INFO
 void __assert(const char *file, unsigned int line)
 {
 	printf("ASSERT: %s:%d\n", file, line);
-	console_flush();
+	backtrace("assert");
+	(void)console_flush();
 	plat_panic_handler();
 }
 #else
 void __assert(void)
 {
+	backtrace("assert");
+	(void)console_flush();
 	plat_panic_handler();
 }
 #endif