ftrace: add stack tracing

[deliverable/linux.git] / include / linux / ftrace.h

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 0a20445dcbcc35bfa3ccdb54641be938a1a1d185..0d3714e7110bde349a2fd1fc823dbadcc9ab9399 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -5,6 +5,12 @@
 
 #include <linux/linkage.h>
 
+extern int ftrace_enabled;
+extern int
+ftrace_enable_sysctl(struct ctl_table *table, int write,
+                    struct file *filp, void __user *buffer, size_t *lenp,
+                    loff_t *ppos);
+
 typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip);
 
 struct ftrace_ops {
@@ -32,6 +38,52 @@ extern void mcount(void);
 # define clear_ftrace_function(ops) do { } while (0)
 #endif /* CONFIG_FTRACE */
 
+#ifdef CONFIG_DYNAMIC_FTRACE
+# define FTRACE_HASHBITS       10
+# define FTRACE_HASHSIZE       (1<<FTRACE_HASHBITS)
+
+enum {
+       FTRACE_FL_FREE          = (1 << 0),
+       FTRACE_FL_FAILED        = (1 << 1),
+       FTRACE_FL_FILTER        = (1 << 2),
+       FTRACE_FL_ENABLED       = (1 << 3),
+};
+
+struct dyn_ftrace {
+       struct hlist_node node;
+       unsigned long     ip;
+       unsigned long     flags;
+};
+
+int ftrace_force_update(void);
+void ftrace_set_filter(unsigned char *buf, int len, int reset);
+
+/* defined in arch */
+extern int ftrace_ip_converted(unsigned long ip);
+extern unsigned char *ftrace_nop_replace(void);
+extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr);
+extern int ftrace_dyn_arch_init(void *data);
+extern int ftrace_mcount_set(unsigned long *data);
+extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
+                             unsigned char *new_code);
+extern int ftrace_update_ftrace_func(ftrace_func_t func);
+extern void ftrace_caller(void);
+extern void ftrace_call(void);
+extern void mcount_call(void);
+#else
+# define ftrace_force_update()                 ({ 0; })
+# define ftrace_set_filter(buf, len, reset)    do { } while (0)
+#endif
+
+/* totally disable ftrace - can not re-enable after this */
+void ftrace_kill(void);
+
+static inline void tracer_disable(void)
+{
+#ifdef CONFIG_FTRACE
+       ftrace_enabled = 0;
+#endif
+}
 
 #ifdef CONFIG_FRAME_POINTER
 /* TODO: need to fix this for ARM */
@@ -41,6 +93,7 @@ extern void mcount(void);
 # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3))
 # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4))
 # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5))
+# define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6))
 #else
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
 # define CALLER_ADDR1 0UL
@@ -48,6 +101,7 @@ extern void mcount(void);
 # define CALLER_ADDR3 0UL
 # define CALLER_ADDR4 0UL
 # define CALLER_ADDR5 0UL
+# define CALLER_ADDR6 0UL
 #endif
 
 #ifdef CONFIG_IRQSOFF_TRACER
@@ -58,4 +112,12 @@ extern void mcount(void);
 # define time_hardirqs_off(a0, a1)             do { } while (0)
 #endif
 
+#ifdef CONFIG_PREEMPT_TRACER
+  extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1);
+  extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1);
+#else
+# define trace_preempt_on(a0, a1)              do { } while (0)
+# define trace_preempt_off(a0, a1)             do { } while (0)
+#endif
+
 #endif /* _LINUX_FTRACE_H */