ust: add files from kernel

diff --git a/libmarkers/jhash.h b/libmarkers/jhash.h
new file mode 100644 (file)
index 0000000..10e4482
--- /dev/null
+++ b/libmarkers/jhash.h
@@ -0,0 +1,145 @@
+#ifndef _LINUX_JHASH_H
+#define _LINUX_JHASH_H
+
+/* jhash.h: Jenkins hash support.
+ *
+ * Copyright (C) 1996 Bob Jenkins (bob_jenkins@burtleburtle.net)
+ *
+ * http://burtleburtle.net/bob/hash/
+ *
+ * These are the credits from Bob's sources:
+ *
+ * lookup2.c, by Bob Jenkins, December 1996, Public Domain.
+ * hash(), hash2(), hash3, and mix() are externally useful functions.
+ * Routines to test the hash are included if SELF_TEST is defined.
+ * You can use this free for any purpose.  It has no warranty.
+ *
+ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
+ *
+ * I've modified Bob's hash to be useful in the Linux kernel, and
+ * any bugs present are surely my fault.  -DaveM
+ */
+
+#include "kernelcompat.h"
+
+/* NOTE: Arguments are modified. */
+#define __jhash_mix(a, b, c) \
+{ \
+  a -= b; a -= c; a ^= (c>>13); \
+  b -= c; b -= a; b ^= (a<<8); \
+  c -= a; c -= b; c ^= (b>>13); \
+  a -= b; a -= c; a ^= (c>>12);  \
+  b -= c; b -= a; b ^= (a<<16); \
+  c -= a; c -= b; c ^= (b>>5); \
+  a -= b; a -= c; a ^= (c>>3);  \
+  b -= c; b -= a; b ^= (a<<10); \
+  c -= a; c -= b; c ^= (b>>15); \
+}
+
+/* The golden ration: an arbitrary value */
+#define JHASH_GOLDEN_RATIO     0x9e3779b9
+
+/* The most generic version, hashes an arbitrary sequence
+ * of bytes.  No alignment or length assumptions are made about
+ * the input key.
+ */
+static inline u32 jhash(const void *key, u32 length, u32 initval)
+{
+       u32 a, b, c, len;
+       const u8 *k = key;
+
+       len = length;
+       a = b = JHASH_GOLDEN_RATIO;
+       c = initval;
+
+       while (len >= 12) {
+               a += (k[0] +((u32)k[1]<<8) +((u32)k[2]<<16) +((u32)k[3]<<24));
+               b += (k[4] +((u32)k[5]<<8) +((u32)k[6]<<16) +((u32)k[7]<<24));
+               c += (k[8] +((u32)k[9]<<8) +((u32)k[10]<<16)+((u32)k[11]<<24));
+
+               __jhash_mix(a,b,c);
+
+               k += 12;
+               len -= 12;
+       }
+
+       c += length;
+       switch (len) {
+       case 11: c += ((u32)k[10]<<24);
+       case 10: c += ((u32)k[9]<<16);
+       case 9 : c += ((u32)k[8]<<8);
+       case 8 : b += ((u32)k[7]<<24);
+       case 7 : b += ((u32)k[6]<<16);
+       case 6 : b += ((u32)k[5]<<8);
+       case 5 : b += k[4];
+       case 4 : a += ((u32)k[3]<<24);
+       case 3 : a += ((u32)k[2]<<16);
+       case 2 : a += ((u32)k[1]<<8);
+       case 1 : a += k[0];
+       };
+
+       __jhash_mix(a,b,c);
+
+       return c;
+}
+
+/* A special optimized version that handles 1 or more of u32s.
+ * The length parameter here is the number of u32s in the key.
+ */
+static inline u32 jhash2(const u32 *k, u32 length, u32 initval)
+{
+       u32 a, b, c, len;
+
+       a = b = JHASH_GOLDEN_RATIO;
+       c = initval;
+       len = length;
+
+       while (len >= 3) {
+               a += k[0];
+               b += k[1];
+               c += k[2];
+               __jhash_mix(a, b, c);
+               k += 3; len -= 3;
+       }
+
+       c += length * 4;
+
+       switch (len) {
+       case 2 : b += k[1];
+       case 1 : a += k[0];
+       };
+
+       __jhash_mix(a,b,c);
+
+       return c;
+}
+
+
+/* A special ultra-optimized versions that knows they are hashing exactly
+ * 3, 2 or 1 word(s).
+ *
+ * NOTE: In partilar the "c += length; __jhash_mix(a,b,c);" normally
+ *       done at the end is not done here.
+ */
+static inline u32 jhash_3words(u32 a, u32 b, u32 c, u32 initval)
+{
+       a += JHASH_GOLDEN_RATIO;
+       b += JHASH_GOLDEN_RATIO;
+       c += initval;
+
+       __jhash_mix(a, b, c);
+
+       return c;
+}
+
+static inline u32 jhash_2words(u32 a, u32 b, u32 initval)
+{
+       return jhash_3words(a, b, 0, initval);
+}
+
+static inline u32 jhash_1word(u32 a, u32 initval)
+{
+       return jhash_3words(a, 0, 0, initval);
+}
+
+#endif /* _LINUX_JHASH_H */

diff --git a/libtracing/tracercore.h b/libtracing/tracercore.h
new file mode 100644 (file)
index 0000000..17322fc
--- /dev/null
+++ b/libtracing/tracercore.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2005,2006 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
+ *
+ * This contains the core definitions for the Linux Trace Toolkit.
+ */
+
+#ifndef LTT_CORE_H
+#define LTT_CORE_H
+
+#include "list.h"
+//ust// #include <linux/percpu.h>
+
+/* ltt's root dir in debugfs */
+#define LTT_ROOT        "ltt"
+
+/*
+ * All modifications of ltt_traces must be done by ltt-tracer.c, while holding
+ * the semaphore. Only reading of this information can be done elsewhere, with
+ * the RCU mechanism : the preemption must be disabled while reading the
+ * list.
+ */
+struct ltt_traces {
+       struct list_head setup_head;    /* Pre-allocated traces list */
+       struct list_head head;          /* Allocated Traces list */
+       unsigned int num_active_traces; /* Number of active traces */
+} ____cacheline_aligned;
+
+extern struct ltt_traces ltt_traces;
+
+/*
+ * get dentry of ltt's root dir
+ */
+struct dentry *get_ltt_root(void);
+
+/* Keep track of trap nesting inside LTT */
+//ust// DECLARE_PER_CPU(unsigned int, ltt_nesting);
+
+typedef int (*ltt_run_filter_functor)(void *trace, uint16_t eID);
+
+extern ltt_run_filter_functor ltt_run_filter;
+
+extern void ltt_filter_register(ltt_run_filter_functor func);
+extern void ltt_filter_unregister(void);
+
+#if defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT)
+
+/*
+ * Calculate the offset needed to align the type.
+ * size_of_type must be non-zero.
+ */
+static inline unsigned int ltt_align(size_t align_drift, size_t size_of_type)
+{
+       size_t alignment = min(sizeof(void *), size_of_type);
+       return (alignment - align_drift) & (alignment - 1);
+}
+/* Default arch alignment */
+#define LTT_ALIGN
+
+static inline int ltt_get_alignment(void)
+{
+       return sizeof(void *);
+}
+
+#else
+
+static inline unsigned int ltt_align(size_t align_drift,
+                size_t size_of_type)
+{
+       return 0;
+}
+
+#define LTT_ALIGN __attribute__((packed))
+
+static inline int ltt_get_alignment(void)
+{
+       return 0;
+}
+#endif /* defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT) */
+
+#endif /* LTT_CORE_H */