Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 1 | #ifndef _DYNAMIC_DEBUG_H |
| 2 | #define _DYNAMIC_DEBUG_H |
| 3 | |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 4 | /* |
| 5 | * An instance of this structure is created in a special |
| 6 | * ELF section at every dynamic debug callsite. At runtime, |
| 7 | * the special section is treated as an array of these. |
| 8 | */ |
| 9 | struct _ddebug { |
| 10 | /* |
| 11 | * These fields are used to drive the user interface |
| 12 | * for selecting and displaying debug callsites. |
| 13 | */ |
| 14 | const char *modname; |
| 15 | const char *function; |
| 16 | const char *filename; |
| 17 | const char *format; |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 18 | unsigned int lineno:24; |
| 19 | /* |
| 20 | * The flags field controls the behaviour at the callsite. |
| 21 | * The bits here are changed dynamically when the user |
Florian Ragwitz | 2b2f68b | 2010-05-24 14:33:21 -0700 | [diff] [blame] | 22 | * writes commands to <debugfs>/dynamic_debug/control |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 23 | */ |
| 24 | #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ |
Bart Van Assche | 8ba6ebf5 | 2011-01-23 17:17:24 +0100 | [diff] [blame] | 25 | #define _DPRINTK_FLAGS_INCL_MODNAME (1<<1) |
| 26 | #define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2) |
| 27 | #define _DPRINTK_FLAGS_INCL_LINENO (1<<3) |
| 28 | #define _DPRINTK_FLAGS_INCL_TID (1<<4) |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 29 | #define _DPRINTK_FLAGS_DEFAULT 0 |
| 30 | unsigned int flags:8; |
Jason Baron | 52159d9 | 2010-09-17 11:09:17 -0400 | [diff] [blame] | 31 | char enabled; |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 32 | } __attribute__((aligned(8))); |
| 33 | |
| 34 | |
| 35 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, |
| 36 | const char *modname); |
| 37 | |
| 38 | #if defined(CONFIG_DYNAMIC_DEBUG) |
Yehuda Sadeh | ff49d74 | 2010-07-03 13:07:35 +1000 | [diff] [blame] | 39 | extern int ddebug_remove_module(const char *mod_name); |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 40 | extern __printf(2, 3) |
| 41 | int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...); |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 42 | |
Joe Perches | cbc4663 | 2011-08-11 14:36:21 -0400 | [diff] [blame] | 43 | struct device; |
| 44 | |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 45 | extern __printf(3, 4) |
| 46 | int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev, |
| 47 | const char *fmt, ...); |
Joe Perches | cbc4663 | 2011-08-11 14:36:21 -0400 | [diff] [blame] | 48 | |
Jason Baron | ffa10cb | 2011-08-11 14:36:48 -0400 | [diff] [blame] | 49 | struct net_device; |
| 50 | |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 51 | extern __printf(3, 4) |
| 52 | int __dynamic_netdev_dbg(struct _ddebug *descriptor, |
| 53 | const struct net_device *dev, |
| 54 | const char *fmt, ...); |
Jason Baron | ffa10cb | 2011-08-11 14:36:48 -0400 | [diff] [blame] | 55 | |
Jason Baron | 07613b0 | 2011-10-04 14:13:15 -0700 | [diff] [blame] | 56 | #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ |
| 57 | static struct _ddebug __used __aligned(8) \ |
| 58 | __attribute__((section("__verbose"))) name = { \ |
| 59 | .modname = KBUILD_MODNAME, \ |
| 60 | .function = __func__, \ |
| 61 | .filename = __FILE__, \ |
| 62 | .format = (fmt), \ |
| 63 | .lineno = __LINE__, \ |
| 64 | .flags = _DPRINTK_FLAGS_DEFAULT, \ |
| 65 | .enabled = false, \ |
| 66 | } |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 67 | |
Jason Baron | 07613b0 | 2011-10-04 14:13:15 -0700 | [diff] [blame] | 68 | #define dynamic_pr_debug(fmt, ...) \ |
| 69 | do { \ |
| 70 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
| 71 | if (unlikely(descriptor.enabled)) \ |
| 72 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ |
| 73 | ##__VA_ARGS__); \ |
| 74 | } while (0) |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 75 | |
Jason Baron | 07613b0 | 2011-10-04 14:13:15 -0700 | [diff] [blame] | 76 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
| 77 | do { \ |
| 78 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
| 79 | if (unlikely(descriptor.enabled)) \ |
| 80 | __dynamic_dev_dbg(&descriptor, dev, fmt, \ |
| 81 | ##__VA_ARGS__); \ |
| 82 | } while (0) |
| 83 | |
| 84 | #define dynamic_netdev_dbg(dev, fmt, ...) \ |
| 85 | do { \ |
| 86 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
| 87 | if (unlikely(descriptor.enabled)) \ |
| 88 | __dynamic_netdev_dbg(&descriptor, dev, fmt, \ |
| 89 | ##__VA_ARGS__); \ |
| 90 | } while (0) |
Jason Baron | ffa10cb | 2011-08-11 14:36:48 -0400 | [diff] [blame] | 91 | |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 92 | #else |
| 93 | |
Yehuda Sadeh | ff49d74 | 2010-07-03 13:07:35 +1000 | [diff] [blame] | 94 | static inline int ddebug_remove_module(const char *mod) |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 95 | { |
| 96 | return 0; |
| 97 | } |
| 98 | |
Joe Perches | 00b5586 | 2009-12-14 18:00:14 -0800 | [diff] [blame] | 99 | #define dynamic_pr_debug(fmt, ...) \ |
| 100 | do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) |
Philipp Reisner | be70e26 | 2010-10-14 11:58:20 +0200 | [diff] [blame] | 101 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
Joe Perches | 00b5586 | 2009-12-14 18:00:14 -0800 | [diff] [blame] | 102 | do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 103 | #endif |
| 104 | |
| 105 | #endif |