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v4.6
  1#ifndef __PERF_DSO
  2#define __PERF_DSO
  3
  4#include <linux/atomic.h>
  5#include <linux/types.h>
  6#include <linux/rbtree.h>
 
  7#include <stdbool.h>
  8#include <pthread.h>
  9#include <linux/types.h>
 10#include <linux/bitops.h>
 11#include "map.h"
 12#include "build-id.h"
 13
 14enum dso_binary_type {
 15	DSO_BINARY_TYPE__KALLSYMS = 0,
 16	DSO_BINARY_TYPE__GUEST_KALLSYMS,
 17	DSO_BINARY_TYPE__VMLINUX,
 18	DSO_BINARY_TYPE__GUEST_VMLINUX,
 19	DSO_BINARY_TYPE__JAVA_JIT,
 20	DSO_BINARY_TYPE__DEBUGLINK,
 21	DSO_BINARY_TYPE__BUILD_ID_CACHE,
 22	DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
 23	DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
 24	DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
 25	DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
 26	DSO_BINARY_TYPE__GUEST_KMODULE,
 27	DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
 28	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
 29	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
 30	DSO_BINARY_TYPE__KCORE,
 31	DSO_BINARY_TYPE__GUEST_KCORE,
 32	DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
 33	DSO_BINARY_TYPE__NOT_FOUND,
 34};
 35
 36enum dso_kernel_type {
 37	DSO_TYPE_USER = 0,
 38	DSO_TYPE_KERNEL,
 39	DSO_TYPE_GUEST_KERNEL
 40};
 41
 42enum dso_swap_type {
 43	DSO_SWAP__UNSET,
 44	DSO_SWAP__NO,
 45	DSO_SWAP__YES,
 46};
 47
 48enum dso_data_status {
 49	DSO_DATA_STATUS_ERROR	= -1,
 50	DSO_DATA_STATUS_UNKNOWN	= 0,
 51	DSO_DATA_STATUS_OK	= 1,
 52};
 53
 54enum dso_data_status_seen {
 55	DSO_DATA_STATUS_SEEN_ITRACE,
 56};
 57
 58enum dso_type {
 59	DSO__TYPE_UNKNOWN,
 60	DSO__TYPE_64BIT,
 61	DSO__TYPE_32BIT,
 62	DSO__TYPE_X32BIT,
 63};
 64
 65enum dso_load_errno {
 66	DSO_LOAD_ERRNO__SUCCESS		= 0,
 67
 68	/*
 69	 * Choose an arbitrary negative big number not to clash with standard
 70	 * errno since SUS requires the errno has distinct positive values.
 71	 * See 'Issue 6' in the link below.
 72	 *
 73	 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
 74	 */
 75	__DSO_LOAD_ERRNO__START		= -10000,
 76
 77	DSO_LOAD_ERRNO__INTERNAL_ERROR	= __DSO_LOAD_ERRNO__START,
 78
 79	/* for symsrc__init() */
 80	DSO_LOAD_ERRNO__INVALID_ELF,
 81	DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
 82	DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
 83
 84	/* for decompress_kmodule */
 85	DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
 86
 87	__DSO_LOAD_ERRNO__END,
 88};
 89
 90#define DSO__SWAP(dso, type, val)			\
 91({							\
 92	type ____r = val;				\
 93	BUG_ON(dso->needs_swap == DSO_SWAP__UNSET);	\
 94	if (dso->needs_swap == DSO_SWAP__YES) {		\
 95		switch (sizeof(____r)) {		\
 96		case 2:					\
 97			____r = bswap_16(val);		\
 98			break;				\
 99		case 4:					\
100			____r = bswap_32(val);		\
101			break;				\
102		case 8:					\
103			____r = bswap_64(val);		\
104			break;				\
105		default:				\
106			BUG_ON(1);			\
107		}					\
108	}						\
109	____r;						\
110})
111
112#define DSO__DATA_CACHE_SIZE 4096
113#define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
114
115struct dso_cache {
116	struct rb_node	rb_node;
117	u64 offset;
118	u64 size;
119	char data[0];
120};
121
122/*
123 * DSOs are put into both a list for fast iteration and rbtree for fast
124 * long name lookup.
125 */
126struct dsos {
127	struct list_head head;
128	struct rb_root	 root;	/* rbtree root sorted by long name */
129	pthread_rwlock_t lock;
130};
131
132struct auxtrace_cache;
133
134struct dso {
135	pthread_mutex_t	 lock;
136	struct list_head node;
137	struct rb_node	 rb_node;	/* rbtree node sorted by long name */
138	struct rb_root	 *root;		/* root of rbtree that rb_node is in */
139	struct rb_root	 symbols[MAP__NR_TYPES];
140	struct rb_root	 symbol_names[MAP__NR_TYPES];
141	struct {
142		u64		addr;
143		struct symbol	*symbol;
144	} last_find_result[MAP__NR_TYPES];
145	void		 *a2l;
146	char		 *symsrc_filename;
147	unsigned int	 a2l_fails;
148	enum dso_kernel_type	kernel;
149	enum dso_swap_type	needs_swap;
150	enum dso_binary_type	symtab_type;
151	enum dso_binary_type	binary_type;
152	enum dso_load_errno	load_errno;
153	u8		 adjust_symbols:1;
154	u8		 has_build_id:1;
155	u8		 has_srcline:1;
156	u8		 hit:1;
157	u8		 annotate_warned:1;
158	u8		 short_name_allocated:1;
159	u8		 long_name_allocated:1;
160	u8		 is_64_bit:1;
161	u8		 sorted_by_name;
162	u8		 loaded;
163	u8		 rel;
164	u8		 build_id[BUILD_ID_SIZE];
165	u64		 text_offset;
166	const char	 *short_name;
167	const char	 *long_name;
168	u16		 long_name_len;
169	u16		 short_name_len;
170	void		*dwfl;			/* DWARF debug info */
171	struct auxtrace_cache *auxtrace_cache;
172
173	/* dso data file */
174	struct {
175		struct rb_root	 cache;
176		int		 fd;
177		int		 status;
178		u32		 status_seen;
179		size_t		 file_size;
180		struct list_head open_entry;
181		u64		 debug_frame_offset;
182		u64		 eh_frame_hdr_offset;
183	} data;
184
185	union { /* Tool specific area */
186		void	 *priv;
187		u64	 db_id;
188	};
189	atomic_t	 refcnt;
190	char		 name[0];
191};
192
193/* dso__for_each_symbol - iterate over the symbols of given type
194 *
195 * @dso: the 'struct dso *' in which symbols itereated
196 * @pos: the 'struct symbol *' to use as a loop cursor
197 * @n: the 'struct rb_node *' to use as a temporary storage
198 * @type: the 'enum map_type' type of symbols
199 */
200#define dso__for_each_symbol(dso, pos, n, type)	\
201	symbols__for_each_entry(&(dso)->symbols[(type)], pos, n)
202
203static inline void dso__set_loaded(struct dso *dso, enum map_type type)
204{
205	dso->loaded |= (1 << type);
206}
207
208struct dso *dso__new(const char *name);
209void dso__delete(struct dso *dso);
210
211void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
212void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
213
214int dso__name_len(const struct dso *dso);
215
216struct dso *dso__get(struct dso *dso);
217void dso__put(struct dso *dso);
218
219static inline void __dso__zput(struct dso **dso)
220{
221	dso__put(*dso);
222	*dso = NULL;
223}
224
225#define dso__zput(dso) __dso__zput(&dso)
226
227bool dso__loaded(const struct dso *dso, enum map_type type);
228
229bool dso__sorted_by_name(const struct dso *dso, enum map_type type);
230void dso__set_sorted_by_name(struct dso *dso, enum map_type type);
231void dso__sort_by_name(struct dso *dso, enum map_type type);
232
233void dso__set_build_id(struct dso *dso, void *build_id);
234bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
235void dso__read_running_kernel_build_id(struct dso *dso,
236				       struct machine *machine);
237int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
238
239char dso__symtab_origin(const struct dso *dso);
240int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
241				   char *root_dir, char *filename, size_t size);
242bool is_supported_compression(const char *ext);
243bool is_kernel_module(const char *pathname, int cpumode);
244bool decompress_to_file(const char *ext, const char *filename, int output_fd);
245bool dso__needs_decompress(struct dso *dso);
246
247struct kmod_path {
248	char *name;
249	char *ext;
250	bool  comp;
251	bool  kmod;
252};
253
254int __kmod_path__parse(struct kmod_path *m, const char *path,
255		     bool alloc_name, bool alloc_ext);
256
257#define kmod_path__parse(__m, __p)      __kmod_path__parse(__m, __p, false, false)
258#define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true , false)
259#define kmod_path__parse_ext(__m, __p)  __kmod_path__parse(__m, __p, false, true)
260
261/*
262 * The dso__data_* external interface provides following functions:
263 *   dso__data_get_fd
264 *   dso__data_put_fd
265 *   dso__data_close
266 *   dso__data_size
267 *   dso__data_read_offset
268 *   dso__data_read_addr
269 *
270 * Please refer to the dso.c object code for each function and
271 * arguments documentation. Following text tries to explain the
272 * dso file descriptor caching.
273 *
274 * The dso__data* interface allows caching of opened file descriptors
275 * to speed up the dso data accesses. The idea is to leave the file
276 * descriptor opened ideally for the whole life of the dso object.
277 *
278 * The current usage of the dso__data_* interface is as follows:
279 *
280 * Get DSO's fd:
281 *   int fd = dso__data_get_fd(dso, machine);
282 *   if (fd >= 0) {
283 *       USE 'fd' SOMEHOW
284 *       dso__data_put_fd(dso);
285 *   }
286 *
287 * Read DSO's data:
288 *   n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
289 *   n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
290 *
291 * Eventually close DSO's fd:
292 *   dso__data_close(dso);
293 *
294 * It is not necessary to close the DSO object data file. Each time new
295 * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
296 * it is crossed, the oldest opened DSO object is closed.
297 *
298 * The dso__delete function calls close_dso function to ensure the
299 * data file descriptor gets closed/unmapped before the dso object
300 * is freed.
301 *
302 * TODO
303*/
304int dso__data_get_fd(struct dso *dso, struct machine *machine);
305void dso__data_put_fd(struct dso *dso);
306void dso__data_close(struct dso *dso);
307
308off_t dso__data_size(struct dso *dso, struct machine *machine);
309ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
310			      u64 offset, u8 *data, ssize_t size);
311ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
312			    struct machine *machine, u64 addr,
313			    u8 *data, ssize_t size);
314bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
315
316struct map *dso__new_map(const char *name);
317struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
318				    const char *short_name, int dso_type);
319
320void __dsos__add(struct dsos *dsos, struct dso *dso);
321void dsos__add(struct dsos *dsos, struct dso *dso);
322struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
323struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
324struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
325struct dso *__dsos__findnew(struct dsos *dsos, const char *name);
326struct dso *dsos__findnew(struct dsos *dsos, const char *name);
327bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
328
329void dso__reset_find_symbol_cache(struct dso *dso);
330
331size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
332			       bool (skip)(struct dso *dso, int parm), int parm);
333size_t __dsos__fprintf(struct list_head *head, FILE *fp);
334
335size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
336size_t dso__fprintf_symbols_by_name(struct dso *dso,
337				    enum map_type type, FILE *fp);
338size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp);
339
340static inline bool dso__is_vmlinux(struct dso *dso)
341{
342	return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
343	       dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
344}
345
346static inline bool dso__is_kcore(struct dso *dso)
347{
348	return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
349	       dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
350}
351
 
 
 
 
 
352void dso__free_a2l(struct dso *dso);
353
354enum dso_type dso__type(struct dso *dso, struct machine *machine);
355
356int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
 
 
357
358#endif /* __PERF_DSO */
v4.10.11
  1#ifndef __PERF_DSO
  2#define __PERF_DSO
  3
  4#include <linux/atomic.h>
  5#include <linux/types.h>
  6#include <linux/rbtree.h>
  7#include <sys/types.h>
  8#include <stdbool.h>
  9#include <pthread.h>
 10#include <linux/types.h>
 11#include <linux/bitops.h>
 12#include "map.h"
 13#include "build-id.h"
 14
 15enum dso_binary_type {
 16	DSO_BINARY_TYPE__KALLSYMS = 0,
 17	DSO_BINARY_TYPE__GUEST_KALLSYMS,
 18	DSO_BINARY_TYPE__VMLINUX,
 19	DSO_BINARY_TYPE__GUEST_VMLINUX,
 20	DSO_BINARY_TYPE__JAVA_JIT,
 21	DSO_BINARY_TYPE__DEBUGLINK,
 22	DSO_BINARY_TYPE__BUILD_ID_CACHE,
 23	DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
 24	DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
 25	DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
 26	DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
 27	DSO_BINARY_TYPE__GUEST_KMODULE,
 28	DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
 29	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
 30	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
 31	DSO_BINARY_TYPE__KCORE,
 32	DSO_BINARY_TYPE__GUEST_KCORE,
 33	DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
 34	DSO_BINARY_TYPE__NOT_FOUND,
 35};
 36
 37enum dso_kernel_type {
 38	DSO_TYPE_USER = 0,
 39	DSO_TYPE_KERNEL,
 40	DSO_TYPE_GUEST_KERNEL
 41};
 42
 43enum dso_swap_type {
 44	DSO_SWAP__UNSET,
 45	DSO_SWAP__NO,
 46	DSO_SWAP__YES,
 47};
 48
 49enum dso_data_status {
 50	DSO_DATA_STATUS_ERROR	= -1,
 51	DSO_DATA_STATUS_UNKNOWN	= 0,
 52	DSO_DATA_STATUS_OK	= 1,
 53};
 54
 55enum dso_data_status_seen {
 56	DSO_DATA_STATUS_SEEN_ITRACE,
 57};
 58
 59enum dso_type {
 60	DSO__TYPE_UNKNOWN,
 61	DSO__TYPE_64BIT,
 62	DSO__TYPE_32BIT,
 63	DSO__TYPE_X32BIT,
 64};
 65
 66enum dso_load_errno {
 67	DSO_LOAD_ERRNO__SUCCESS		= 0,
 68
 69	/*
 70	 * Choose an arbitrary negative big number not to clash with standard
 71	 * errno since SUS requires the errno has distinct positive values.
 72	 * See 'Issue 6' in the link below.
 73	 *
 74	 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
 75	 */
 76	__DSO_LOAD_ERRNO__START		= -10000,
 77
 78	DSO_LOAD_ERRNO__INTERNAL_ERROR	= __DSO_LOAD_ERRNO__START,
 79
 80	/* for symsrc__init() */
 81	DSO_LOAD_ERRNO__INVALID_ELF,
 82	DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
 83	DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
 84
 85	/* for decompress_kmodule */
 86	DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
 87
 88	__DSO_LOAD_ERRNO__END,
 89};
 90
 91#define DSO__SWAP(dso, type, val)			\
 92({							\
 93	type ____r = val;				\
 94	BUG_ON(dso->needs_swap == DSO_SWAP__UNSET);	\
 95	if (dso->needs_swap == DSO_SWAP__YES) {		\
 96		switch (sizeof(____r)) {		\
 97		case 2:					\
 98			____r = bswap_16(val);		\
 99			break;				\
100		case 4:					\
101			____r = bswap_32(val);		\
102			break;				\
103		case 8:					\
104			____r = bswap_64(val);		\
105			break;				\
106		default:				\
107			BUG_ON(1);			\
108		}					\
109	}						\
110	____r;						\
111})
112
113#define DSO__DATA_CACHE_SIZE 4096
114#define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
115
116struct dso_cache {
117	struct rb_node	rb_node;
118	u64 offset;
119	u64 size;
120	char data[0];
121};
122
123/*
124 * DSOs are put into both a list for fast iteration and rbtree for fast
125 * long name lookup.
126 */
127struct dsos {
128	struct list_head head;
129	struct rb_root	 root;	/* rbtree root sorted by long name */
130	pthread_rwlock_t lock;
131};
132
133struct auxtrace_cache;
134
135struct dso {
136	pthread_mutex_t	 lock;
137	struct list_head node;
138	struct rb_node	 rb_node;	/* rbtree node sorted by long name */
139	struct rb_root	 *root;		/* root of rbtree that rb_node is in */
140	struct rb_root	 symbols[MAP__NR_TYPES];
141	struct rb_root	 symbol_names[MAP__NR_TYPES];
142	struct {
143		u64		addr;
144		struct symbol	*symbol;
145	} last_find_result[MAP__NR_TYPES];
146	void		 *a2l;
147	char		 *symsrc_filename;
148	unsigned int	 a2l_fails;
149	enum dso_kernel_type	kernel;
150	enum dso_swap_type	needs_swap;
151	enum dso_binary_type	symtab_type;
152	enum dso_binary_type	binary_type;
153	enum dso_load_errno	load_errno;
154	u8		 adjust_symbols:1;
155	u8		 has_build_id:1;
156	u8		 has_srcline:1;
157	u8		 hit:1;
158	u8		 annotate_warned:1;
159	u8		 short_name_allocated:1;
160	u8		 long_name_allocated:1;
161	u8		 is_64_bit:1;
162	u8		 sorted_by_name;
163	u8		 loaded;
164	u8		 rel;
165	u8		 build_id[BUILD_ID_SIZE];
166	u64		 text_offset;
167	const char	 *short_name;
168	const char	 *long_name;
169	u16		 long_name_len;
170	u16		 short_name_len;
171	void		*dwfl;			/* DWARF debug info */
172	struct auxtrace_cache *auxtrace_cache;
173
174	/* dso data file */
175	struct {
176		struct rb_root	 cache;
177		int		 fd;
178		int		 status;
179		u32		 status_seen;
180		size_t		 file_size;
181		struct list_head open_entry;
182		u64		 debug_frame_offset;
183		u64		 eh_frame_hdr_offset;
184	} data;
185
186	union { /* Tool specific area */
187		void	 *priv;
188		u64	 db_id;
189	};
190	atomic_t	 refcnt;
191	char		 name[0];
192};
193
194/* dso__for_each_symbol - iterate over the symbols of given type
195 *
196 * @dso: the 'struct dso *' in which symbols itereated
197 * @pos: the 'struct symbol *' to use as a loop cursor
198 * @n: the 'struct rb_node *' to use as a temporary storage
199 * @type: the 'enum map_type' type of symbols
200 */
201#define dso__for_each_symbol(dso, pos, n, type)	\
202	symbols__for_each_entry(&(dso)->symbols[(type)], pos, n)
203
204static inline void dso__set_loaded(struct dso *dso, enum map_type type)
205{
206	dso->loaded |= (1 << type);
207}
208
209struct dso *dso__new(const char *name);
210void dso__delete(struct dso *dso);
211
212void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
213void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
214
215int dso__name_len(const struct dso *dso);
216
217struct dso *dso__get(struct dso *dso);
218void dso__put(struct dso *dso);
219
220static inline void __dso__zput(struct dso **dso)
221{
222	dso__put(*dso);
223	*dso = NULL;
224}
225
226#define dso__zput(dso) __dso__zput(&dso)
227
228bool dso__loaded(const struct dso *dso, enum map_type type);
229
230bool dso__sorted_by_name(const struct dso *dso, enum map_type type);
231void dso__set_sorted_by_name(struct dso *dso, enum map_type type);
232void dso__sort_by_name(struct dso *dso, enum map_type type);
233
234void dso__set_build_id(struct dso *dso, void *build_id);
235bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
236void dso__read_running_kernel_build_id(struct dso *dso,
237				       struct machine *machine);
238int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
239
240char dso__symtab_origin(const struct dso *dso);
241int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
242				   char *root_dir, char *filename, size_t size);
243bool is_supported_compression(const char *ext);
244bool is_kernel_module(const char *pathname, int cpumode);
245bool decompress_to_file(const char *ext, const char *filename, int output_fd);
246bool dso__needs_decompress(struct dso *dso);
247
248struct kmod_path {
249	char *name;
250	char *ext;
251	bool  comp;
252	bool  kmod;
253};
254
255int __kmod_path__parse(struct kmod_path *m, const char *path,
256		     bool alloc_name, bool alloc_ext);
257
258#define kmod_path__parse(__m, __p)      __kmod_path__parse(__m, __p, false, false)
259#define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true , false)
260#define kmod_path__parse_ext(__m, __p)  __kmod_path__parse(__m, __p, false, true)
261
262/*
263 * The dso__data_* external interface provides following functions:
264 *   dso__data_get_fd
265 *   dso__data_put_fd
266 *   dso__data_close
267 *   dso__data_size
268 *   dso__data_read_offset
269 *   dso__data_read_addr
270 *
271 * Please refer to the dso.c object code for each function and
272 * arguments documentation. Following text tries to explain the
273 * dso file descriptor caching.
274 *
275 * The dso__data* interface allows caching of opened file descriptors
276 * to speed up the dso data accesses. The idea is to leave the file
277 * descriptor opened ideally for the whole life of the dso object.
278 *
279 * The current usage of the dso__data_* interface is as follows:
280 *
281 * Get DSO's fd:
282 *   int fd = dso__data_get_fd(dso, machine);
283 *   if (fd >= 0) {
284 *       USE 'fd' SOMEHOW
285 *       dso__data_put_fd(dso);
286 *   }
287 *
288 * Read DSO's data:
289 *   n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
290 *   n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
291 *
292 * Eventually close DSO's fd:
293 *   dso__data_close(dso);
294 *
295 * It is not necessary to close the DSO object data file. Each time new
296 * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
297 * it is crossed, the oldest opened DSO object is closed.
298 *
299 * The dso__delete function calls close_dso function to ensure the
300 * data file descriptor gets closed/unmapped before the dso object
301 * is freed.
302 *
303 * TODO
304*/
305int dso__data_get_fd(struct dso *dso, struct machine *machine);
306void dso__data_put_fd(struct dso *dso);
307void dso__data_close(struct dso *dso);
308
309off_t dso__data_size(struct dso *dso, struct machine *machine);
310ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
311			      u64 offset, u8 *data, ssize_t size);
312ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
313			    struct machine *machine, u64 addr,
314			    u8 *data, ssize_t size);
315bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
316
317struct map *dso__new_map(const char *name);
318struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
319				    const char *short_name, int dso_type);
320
321void __dsos__add(struct dsos *dsos, struct dso *dso);
322void dsos__add(struct dsos *dsos, struct dso *dso);
323struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
324struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
325struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
326struct dso *__dsos__findnew(struct dsos *dsos, const char *name);
327struct dso *dsos__findnew(struct dsos *dsos, const char *name);
328bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
329
330void dso__reset_find_symbol_cache(struct dso *dso);
331
332size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
333			       bool (skip)(struct dso *dso, int parm), int parm);
334size_t __dsos__fprintf(struct list_head *head, FILE *fp);
335
336size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
337size_t dso__fprintf_symbols_by_name(struct dso *dso,
338				    enum map_type type, FILE *fp);
339size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp);
340
341static inline bool dso__is_vmlinux(struct dso *dso)
342{
343	return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
344	       dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
345}
346
347static inline bool dso__is_kcore(struct dso *dso)
348{
349	return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
350	       dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
351}
352
353static inline bool dso__is_kallsyms(struct dso *dso)
354{
355	return dso->kernel && dso->long_name[0] != '/';
356}
357
358void dso__free_a2l(struct dso *dso);
359
360enum dso_type dso__type(struct dso *dso, struct machine *machine);
361
362int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
363
364void reset_fd_limit(void);
365
366#endif /* __PERF_DSO */