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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/dynamic_debug.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/dynamic_debug.h')
-rw-r--r-- | include/linux/dynamic_debug.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h new file mode 100644 index 00000000..7e3c53a9 --- /dev/null +++ b/include/linux/dynamic_debug.h @@ -0,0 +1,108 @@ +#ifndef _DYNAMIC_DEBUG_H +#define _DYNAMIC_DEBUG_H + +/* + * An instance of this structure is created in a special + * ELF section at every dynamic debug callsite. At runtime, + * the special section is treated as an array of these. + */ +struct _ddebug { + /* + * These fields are used to drive the user interface + * for selecting and displaying debug callsites. + */ + const char *modname; + const char *function; + const char *filename; + const char *format; + unsigned int lineno:18; + /* + * The flags field controls the behaviour at the callsite. + * The bits here are changed dynamically when the user + * writes commands to <debugfs>/dynamic_debug/control + */ +#define _DPRINTK_FLAGS_NONE 0 +#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ +#define _DPRINTK_FLAGS_INCL_MODNAME (1<<1) +#define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2) +#define _DPRINTK_FLAGS_INCL_LINENO (1<<3) +#define _DPRINTK_FLAGS_INCL_TID (1<<4) +#if defined DEBUG +#define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT +#else +#define _DPRINTK_FLAGS_DEFAULT 0 +#endif + unsigned int flags:8; +} __attribute__((aligned(8))); + + +int ddebug_add_module(struct _ddebug *tab, unsigned int n, + const char *modname); + +#if defined(CONFIG_DYNAMIC_DEBUG) +extern int ddebug_remove_module(const char *mod_name); +extern __printf(2, 3) +int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...); + +struct device; + +extern __printf(3, 4) +int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev, + const char *fmt, ...); + +struct net_device; + +extern __printf(3, 4) +int __dynamic_netdev_dbg(struct _ddebug *descriptor, + const struct net_device *dev, + const char *fmt, ...); + +#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ + static struct _ddebug __used __aligned(8) \ + __attribute__((section("__verbose"))) name = { \ + .modname = KBUILD_MODNAME, \ + .function = __func__, \ + .filename = __FILE__, \ + .format = (fmt), \ + .lineno = __LINE__, \ + .flags = _DPRINTK_FLAGS_DEFAULT, \ + } + +#define dynamic_pr_debug(fmt, ...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ + ##__VA_ARGS__); \ +} while (0) + +#define dynamic_dev_dbg(dev, fmt, ...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + __dynamic_dev_dbg(&descriptor, dev, fmt, \ + ##__VA_ARGS__); \ +} while (0) + +#define dynamic_netdev_dbg(dev, fmt, ...) \ +do { \ + DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ + if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ + __dynamic_netdev_dbg(&descriptor, dev, fmt, \ + ##__VA_ARGS__); \ +} while (0) + +#else + +static inline int ddebug_remove_module(const char *mod) +{ + return 0; +} + +#define dynamic_pr_debug(fmt, ...) \ + do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) +#define dynamic_dev_dbg(dev, fmt, ...) \ + do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) +#endif + +#endif |