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-rw-r--r--include/linux/compiler.h2
-rw-r--r--include/linux/ftrace.h84
-rw-r--r--include/linux/init.h2
-rw-r--r--include/linux/kernel.h5
-rw-r--r--include/linux/kprobes.h5
-rw-r--r--include/linux/linkage.h2
-rw-r--r--include/linux/marker.h7
-rw-r--r--include/linux/mmiotrace.h20
-rw-r--r--include/linux/module.h17
-rw-r--r--include/linux/ring_buffer.h127
-rw-r--r--include/linux/tracepoint.h137
11 files changed, 393 insertions, 15 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 8322141ee480..98115d9d04da 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -44,6 +44,8 @@ extern void __chk_io_ptr(const volatile void __iomem *);
# error Sorry, your compiler is too old/not recognized.
#endif
+#define notrace __attribute__((no_instrument_function))
+
/* Intel compiler defines __GNUC__. So we will overwrite implementations
* coming from above header files here
*/
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index bb384068272e..a3d46151be19 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -1,10 +1,14 @@
#ifndef _LINUX_FTRACE_H
#define _LINUX_FTRACE_H
-#ifdef CONFIG_FTRACE
-
#include <linux/linkage.h>
#include <linux/fs.h>
+#include <linux/ktime.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kallsyms.h>
+
+#ifdef CONFIG_FTRACE
extern int ftrace_enabled;
extern int
@@ -36,6 +40,7 @@ extern void ftrace_stub(unsigned long a0, unsigned long a1);
# define register_ftrace_function(ops) do { } while (0)
# define unregister_ftrace_function(ops) do { } while (0)
# define clear_ftrace_function(ops) do { } while (0)
+static inline void ftrace_kill_atomic(void) { }
#endif /* CONFIG_FTRACE */
#ifdef CONFIG_DYNAMIC_FTRACE
@@ -76,8 +81,10 @@ extern void mcount_call(void);
extern int skip_trace(unsigned long ip);
-void ftrace_disable_daemon(void);
-void ftrace_enable_daemon(void);
+extern void ftrace_release(void *start, unsigned long size);
+
+extern void ftrace_disable_daemon(void);
+extern void ftrace_enable_daemon(void);
#else
# define skip_trace(ip) ({ 0; })
@@ -85,6 +92,7 @@ void ftrace_enable_daemon(void);
# define ftrace_set_filter(buf, len, reset) do { } while (0)
# define ftrace_disable_daemon() do { } while (0)
# define ftrace_enable_daemon() do { } while (0)
+static inline void ftrace_release(void *start, unsigned long size) { }
#endif /* CONFIG_DYNAMIC_FTRACE */
/* totally disable ftrace - can not re-enable after this */
@@ -98,9 +106,11 @@ static inline void tracer_disable(void)
#endif
}
-/* Ftrace disable/restore without lock. Some synchronization mechanism
+/*
+ * Ftrace disable/restore without lock. Some synchronization mechanism
* must be used to prevent ftrace_enabled to be changed between
- * disable/restore. */
+ * disable/restore.
+ */
static inline int __ftrace_enabled_save(void)
{
#ifdef CONFIG_FTRACE
@@ -157,9 +167,71 @@ static inline void __ftrace_enabled_restore(int enabled)
#ifdef CONFIG_TRACING
extern void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
+
+/**
+ * ftrace_printk - printf formatting in the ftrace buffer
+ * @fmt: the printf format for printing
+ *
+ * Note: __ftrace_printk is an internal function for ftrace_printk and
+ * the @ip is passed in via the ftrace_printk macro.
+ *
+ * This function allows a kernel developer to debug fast path sections
+ * that printk is not appropriate for. By scattering in various
+ * printk like tracing in the code, a developer can quickly see
+ * where problems are occurring.
+ *
+ * This is intended as a debugging tool for the developer only.
+ * Please refrain from leaving ftrace_printks scattered around in
+ * your code.
+ */
+# define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt)
+extern int
+__ftrace_printk(unsigned long ip, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern void ftrace_dump(void);
#else
static inline void
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
+static inline int
+ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0)));
+
+static inline int
+ftrace_printk(const char *fmt, ...)
+{
+ return 0;
+}
+static inline void ftrace_dump(void) { }
#endif
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+extern void ftrace_init(void);
+extern void ftrace_init_module(unsigned long *start, unsigned long *end);
+#else
+static inline void ftrace_init(void) { }
+static inline void
+ftrace_init_module(unsigned long *start, unsigned long *end) { }
+#endif
+
+
+struct boot_trace {
+ pid_t caller;
+ char func[KSYM_NAME_LEN];
+ int result;
+ unsigned long long duration; /* usecs */
+ ktime_t calltime;
+ ktime_t rettime;
+};
+
+#ifdef CONFIG_BOOT_TRACER
+extern void trace_boot(struct boot_trace *it, initcall_t fn);
+extern void start_boot_trace(void);
+extern void stop_boot_trace(void);
+#else
+static inline void trace_boot(struct boot_trace *it, initcall_t fn) { }
+static inline void start_boot_trace(void) { }
+static inline void stop_boot_trace(void) { }
+#endif
+
+
+
#endif /* _LINUX_FTRACE_H */
diff --git a/include/linux/init.h b/include/linux/init.h
index ad63824460e3..0c1264668be0 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -40,7 +40,7 @@
/* These are for everybody (although not all archs will actually
discard it in modules) */
-#define __init __section(.init.text) __cold
+#define __init __section(.init.text) __cold notrace
#define __initdata __section(.init.data)
#define __initconst __section(.init.rodata)
#define __exitdata __section(.exit.data)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5a566b705ca9..94d17ff64c5a 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -496,4 +496,9 @@ struct sysinfo {
#define NUMA_BUILD 0
#endif
+/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
+#endif
+
#endif
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 0be7795655fa..497b1d1f7a05 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -29,6 +29,7 @@
* <jkenisto@us.ibm.com> and Prasanna S Panchamukhi
* <prasanna@in.ibm.com> added function-return probes.
*/
+#include <linux/linkage.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/smp.h>
@@ -47,7 +48,7 @@
#define KPROBE_HIT_SSDONE 0x00000008
/* Attach to insert probes on any functions which should be ignored*/
-#define __kprobes __attribute__((__section__(".kprobes.text")))
+#define __kprobes __attribute__((__section__(".kprobes.text"))) notrace
struct kprobe;
struct pt_regs;
@@ -256,7 +257,7 @@ void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
#else /* CONFIG_KPROBES */
-#define __kprobes /**/
+#define __kprobes notrace
struct jprobe;
struct kretprobe;
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index 56ba37394656..9fd1f859021b 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -4,8 +4,6 @@
#include <linux/compiler.h>
#include <asm/linkage.h>
-#define notrace __attribute__((no_instrument_function))
-
#ifdef __cplusplus
#define CPP_ASMLINKAGE extern "C"
#else
diff --git a/include/linux/marker.h b/include/linux/marker.h
index 1290653f9241..889196c7fbb1 100644
--- a/include/linux/marker.h
+++ b/include/linux/marker.h
@@ -160,4 +160,11 @@ extern int marker_probe_unregister_private_data(marker_probe_func *probe,
extern void *marker_get_private_data(const char *name, marker_probe_func *probe,
int num);
+/*
+ * marker_synchronize_unregister must be called between the last marker probe
+ * unregistration and the end of module exit to make sure there is no caller
+ * executing a probe when it is freed.
+ */
+#define marker_synchronize_unregister() synchronize_sched()
+
#endif
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h
index 61d19e1b7a0b..139d7c88d9c9 100644
--- a/include/linux/mmiotrace.h
+++ b/include/linux/mmiotrace.h
@@ -34,11 +34,15 @@ extern void unregister_kmmio_probe(struct kmmio_probe *p);
/* Called from page fault handler. */
extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
-/* Called from ioremap.c */
#ifdef CONFIG_MMIOTRACE
+/* Called from ioremap.c */
extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
void __iomem *addr);
extern void mmiotrace_iounmap(volatile void __iomem *addr);
+
+/* For anyone to insert markers. Remember trailing newline. */
+extern int mmiotrace_printk(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
#else
static inline void mmiotrace_ioremap(resource_size_t offset,
unsigned long size, void __iomem *addr)
@@ -48,15 +52,22 @@ static inline void mmiotrace_ioremap(resource_size_t offset,
static inline void mmiotrace_iounmap(volatile void __iomem *addr)
{
}
-#endif /* CONFIG_MMIOTRACE_HOOKS */
+
+static inline int mmiotrace_printk(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 0)));
+
+static inline int mmiotrace_printk(const char *fmt, ...)
+{
+ return 0;
+}
+#endif /* CONFIG_MMIOTRACE */
enum mm_io_opcode {
MMIO_READ = 0x1, /* struct mmiotrace_rw */
MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
MMIO_PROBE = 0x3, /* struct mmiotrace_map */
MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
- MMIO_MARKER = 0x5, /* raw char data */
- MMIO_UNKNOWN_OP = 0x6, /* struct mmiotrace_rw */
+ MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
};
struct mmiotrace_rw {
@@ -81,5 +92,6 @@ extern void enable_mmiotrace(void);
extern void disable_mmiotrace(void);
extern void mmio_trace_rw(struct mmiotrace_rw *rw);
extern void mmio_trace_mapping(struct mmiotrace_map *map);
+extern int mmio_trace_printk(const char *fmt, va_list args);
#endif /* MMIOTRACE_H */
diff --git a/include/linux/module.h b/include/linux/module.h
index a41555cbe00a..5d2970cdce93 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -16,6 +16,7 @@
#include <linux/kobject.h>
#include <linux/moduleparam.h>
#include <linux/marker.h>
+#include <linux/tracepoint.h>
#include <asm/local.h>
#include <asm/module.h>
@@ -331,6 +332,10 @@ struct module
struct marker *markers;
unsigned int num_markers;
#endif
+#ifdef CONFIG_TRACEPOINTS
+ struct tracepoint *tracepoints;
+ unsigned int num_tracepoints;
+#endif
#ifdef CONFIG_MODULE_UNLOAD
/* What modules depend on me? */
@@ -453,6 +458,9 @@ extern void print_modules(void);
extern void module_update_markers(void);
+extern void module_update_tracepoints(void);
+extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
+
#else /* !CONFIG_MODULES... */
#define EXPORT_SYMBOL(sym)
#define EXPORT_SYMBOL_GPL(sym)
@@ -557,6 +565,15 @@ static inline void module_update_markers(void)
{
}
+static inline void module_update_tracepoints(void)
+{
+}
+
+static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
+{
+ return 0;
+}
+
#endif /* CONFIG_MODULES */
struct device_driver;
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
new file mode 100644
index 000000000000..536b0ca46a03
--- /dev/null
+++ b/include/linux/ring_buffer.h
@@ -0,0 +1,127 @@
+#ifndef _LINUX_RING_BUFFER_H
+#define _LINUX_RING_BUFFER_H
+
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+
+struct ring_buffer;
+struct ring_buffer_iter;
+
+/*
+ * Don't reference this struct directly, use functions below.
+ */
+struct ring_buffer_event {
+ u32 type:2, len:3, time_delta:27;
+ u32 array[];
+};
+
+/**
+ * enum ring_buffer_type - internal ring buffer types
+ *
+ * @RINGBUF_TYPE_PADDING: Left over page padding
+ * array is ignored
+ * size is variable depending on how much
+ * padding is needed
+ *
+ * @RINGBUF_TYPE_TIME_EXTEND: Extend the time delta
+ * array[0] = time delta (28 .. 59)
+ * size = 8 bytes
+ *
+ * @RINGBUF_TYPE_TIME_STAMP: Sync time stamp with external clock
+ * array[0] = tv_nsec
+ * array[1] = tv_sec
+ * size = 16 bytes
+ *
+ * @RINGBUF_TYPE_DATA: Data record
+ * If len is zero:
+ * array[0] holds the actual length
+ * array[1..(length+3)/4-1] holds data
+ * else
+ * length = len << 2
+ * array[0..(length+3)/4] holds data
+ */
+enum ring_buffer_type {
+ RINGBUF_TYPE_PADDING,
+ RINGBUF_TYPE_TIME_EXTEND,
+ /* FIXME: RINGBUF_TYPE_TIME_STAMP not implemented */
+ RINGBUF_TYPE_TIME_STAMP,
+ RINGBUF_TYPE_DATA,
+};
+
+unsigned ring_buffer_event_length(struct ring_buffer_event *event);
+void *ring_buffer_event_data(struct ring_buffer_event *event);
+
+/**
+ * ring_buffer_event_time_delta - return the delta timestamp of the event
+ * @event: the event to get the delta timestamp of
+ *
+ * The delta timestamp is the 27 bit timestamp since the last event.
+ */
+static inline unsigned
+ring_buffer_event_time_delta(struct ring_buffer_event *event)
+{
+ return event->time_delta;
+}
+
+/*
+ * size is in bytes for each per CPU buffer.
+ */
+struct ring_buffer *
+ring_buffer_alloc(unsigned long size, unsigned flags);
+void ring_buffer_free(struct ring_buffer *buffer);
+
+int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size);
+
+struct ring_buffer_event *
+ring_buffer_lock_reserve(struct ring_buffer *buffer,
+ unsigned long length,
+ unsigned long *flags);
+int ring_buffer_unlock_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event,
+ unsigned long flags);
+int ring_buffer_write(struct ring_buffer *buffer,
+ unsigned long length, void *data);
+
+struct ring_buffer_event *
+ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts);
+struct ring_buffer_event *
+ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts);
+
+struct ring_buffer_iter *
+ring_buffer_read_start(struct ring_buffer *buffer, int cpu);
+void ring_buffer_read_finish(struct ring_buffer_iter *iter);
+
+struct ring_buffer_event *
+ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts);
+struct ring_buffer_event *
+ring_buffer_read(struct ring_buffer_iter *iter, u64 *ts);
+void ring_buffer_iter_reset(struct ring_buffer_iter *iter);
+int ring_buffer_iter_empty(struct ring_buffer_iter *iter);
+
+unsigned long ring_buffer_size(struct ring_buffer *buffer);
+
+void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu);
+void ring_buffer_reset(struct ring_buffer *buffer);
+
+int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
+ struct ring_buffer *buffer_b, int cpu);
+
+int ring_buffer_empty(struct ring_buffer *buffer);
+int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu);
+
+void ring_buffer_record_disable(struct ring_buffer *buffer);
+void ring_buffer_record_enable(struct ring_buffer *buffer);
+void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu);
+void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu);
+
+unsigned long ring_buffer_entries(struct ring_buffer *buffer);
+unsigned long ring_buffer_overruns(struct ring_buffer *buffer);
+
+u64 ring_buffer_time_stamp(int cpu);
+void ring_buffer_normalize_time_stamp(int cpu, u64 *ts);
+
+enum ring_buffer_flags {
+ RB_FL_OVERWRITE = 1 << 0,
+};
+
+#endif /* _LINUX_RING_BUFFER_H */
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
new file mode 100644
index 000000000000..c5bb39c7a770
--- /dev/null
+++ b/include/linux/tracepoint.h
@@ -0,0 +1,137 @@
+#ifndef _LINUX_TRACEPOINT_H
+#define _LINUX_TRACEPOINT_H
+
+/*
+ * Kernel Tracepoint API.
+ *
+ * See Documentation/tracepoint.txt.
+ *
+ * (C) Copyright 2008 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * Heavily inspired from the Linux Kernel Markers.
+ *
+ * This file is released under the GPLv2.
+ * See the file COPYING for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+
+struct module;
+struct tracepoint;
+
+struct tracepoint {
+ const char *name; /* Tracepoint name */
+ int state; /* State. */
+ void **funcs;
+} __attribute__((aligned(8)));
+
+
+#define TPPROTO(args...) args
+#define TPARGS(args...) args
+
+#ifdef CONFIG_TRACEPOINTS
+
+/*
+ * it_func[0] is never NULL because there is at least one element in the array
+ * when the array itself is non NULL.
+ */
+#define __DO_TRACE(tp, proto, args) \
+ do { \
+ void **it_func; \
+ \
+ rcu_read_lock_sched(); \
+ it_func = rcu_dereference((tp)->funcs); \
+ if (it_func) { \
+ do { \
+ ((void(*)(proto))(*it_func))(args); \
+ } while (*(++it_func)); \
+ } \
+ rcu_read_unlock_sched(); \
+ } while (0)
+
+/*
+ * Make sure the alignment of the structure in the __tracepoints section will
+ * not add unwanted padding between the beginning of the section and the
+ * structure. Force alignment to the same alignment as the section start.
+ */
+#define DEFINE_TRACE(name, proto, args) \
+ static inline void trace_##name(proto) \
+ { \
+ static const char __tpstrtab_##name[] \
+ __attribute__((section("__tracepoints_strings"))) \
+ = #name ":" #proto; \
+ static struct tracepoint __tracepoint_##name \
+ __attribute__((section("__tracepoints"), aligned(8))) = \
+ { __tpstrtab_##name, 0, NULL }; \
+ if (unlikely(__tracepoint_##name.state)) \
+ __DO_TRACE(&__tracepoint_##name, \
+ TPPROTO(proto), TPARGS(args)); \
+ } \
+ static inline int register_trace_##name(void (*probe)(proto)) \
+ { \
+ return tracepoint_probe_register(#name ":" #proto, \
+ (void *)probe); \
+ } \
+ static inline void unregister_trace_##name(void (*probe)(proto))\
+ { \
+ tracepoint_probe_unregister(#name ":" #proto, \
+ (void *)probe); \
+ }
+
+extern void tracepoint_update_probe_range(struct tracepoint *begin,
+ struct tracepoint *end);
+
+#else /* !CONFIG_TRACEPOINTS */
+#define DEFINE_TRACE(name, proto, args) \
+ static inline void _do_trace_##name(struct tracepoint *tp, proto) \
+ { } \
+ static inline void trace_##name(proto) \
+ { } \
+ static inline int register_trace_##name(void (*probe)(proto)) \
+ { \
+ return -ENOSYS; \
+ } \
+ static inline void unregister_trace_##name(void (*probe)(proto))\
+ { }
+
+static inline void tracepoint_update_probe_range(struct tracepoint *begin,
+ struct tracepoint *end)
+{ }
+#endif /* CONFIG_TRACEPOINTS */
+
+/*
+ * Connect a probe to a tracepoint.
+ * Internal API, should not be used directly.
+ */
+extern int tracepoint_probe_register(const char *name, void *probe);
+
+/*
+ * Disconnect a probe from a tracepoint.
+ * Internal API, should not be used directly.
+ */
+extern int tracepoint_probe_unregister(const char *name, void *probe);
+
+struct tracepoint_iter {
+ struct module *module;
+ struct tracepoint *tracepoint;
+};
+
+extern void tracepoint_iter_start(struct tracepoint_iter *iter);
+extern void tracepoint_iter_next(struct tracepoint_iter *iter);
+extern void tracepoint_iter_stop(struct tracepoint_iter *iter);
+extern void tracepoint_iter_reset(struct tracepoint_iter *iter);
+extern int tracepoint_get_iter_range(struct tracepoint **tracepoint,
+ struct tracepoint *begin, struct tracepoint *end);
+
+/*
+ * tracepoint_synchronize_unregister must be called between the last tracepoint
+ * probe unregistration and the end of module exit to make sure there is no
+ * caller executing a probe when it is freed.
+ */
+static inline void tracepoint_synchronize_unregister(void)
+{
+ synchronize_sched();
+}
+
+#endif