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authorJohn Levon <levon@movementarian.org>2005-06-24 01:02:47 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 03:06:27 -0400
commit0c0a400d1debb172c596b24ab82efab4975990a9 (patch)
tree58bd3604e46151662268bd558dce49ac8e72cca0 /drivers/oprofile
parent391cd727eac2e10be7685efd739a3ea9de87393c (diff)
[PATCH] oprofile: report anonymous region samples
The below patch passes samples from anonymous regions to userspace instead of just dropping them. This provides the support needed for reporting anonymous-region code samples (today: basic accumulated results; later: Java and other dynamically compiled code). As this changes the format, an upgrade to the just-released 0.9 release of the userspace tools is required. This patch is based upon an earlier one by Will Cohen <wcohen@redhat.com> Signed-off-by: John Levon <levon@movementarian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/oprofile')
-rw-r--r--drivers/oprofile/buffer_sync.c29
-rw-r--r--drivers/oprofile/event_buffer.h3
2 files changed, 21 insertions, 11 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 745a14183634..531b07313141 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -206,7 +206,7 @@ static inline unsigned long fast_get_dcookie(struct dentry * dentry,
206 */ 206 */
207static unsigned long get_exec_dcookie(struct mm_struct * mm) 207static unsigned long get_exec_dcookie(struct mm_struct * mm)
208{ 208{
209 unsigned long cookie = 0; 209 unsigned long cookie = NO_COOKIE;
210 struct vm_area_struct * vma; 210 struct vm_area_struct * vma;
211 211
212 if (!mm) 212 if (!mm)
@@ -234,35 +234,42 @@ out:
234 */ 234 */
235static unsigned long lookup_dcookie(struct mm_struct * mm, unsigned long addr, off_t * offset) 235static unsigned long lookup_dcookie(struct mm_struct * mm, unsigned long addr, off_t * offset)
236{ 236{
237 unsigned long cookie = 0; 237 unsigned long cookie = NO_COOKIE;
238 struct vm_area_struct * vma; 238 struct vm_area_struct * vma;
239 239
240 for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) { 240 for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
241 241
242 if (!vma->vm_file)
243 continue;
244
245 if (addr < vma->vm_start || addr >= vma->vm_end) 242 if (addr < vma->vm_start || addr >= vma->vm_end)
246 continue; 243 continue;
247 244
248 cookie = fast_get_dcookie(vma->vm_file->f_dentry, 245 if (vma->vm_file) {
249 vma->vm_file->f_vfsmnt); 246 cookie = fast_get_dcookie(vma->vm_file->f_dentry,
250 *offset = (vma->vm_pgoff << PAGE_SHIFT) + addr - vma->vm_start; 247 vma->vm_file->f_vfsmnt);
248 *offset = (vma->vm_pgoff << PAGE_SHIFT) + addr -
249 vma->vm_start;
250 } else {
251 /* must be an anonymous map */
252 *offset = addr;
253 }
254
251 break; 255 break;
252 } 256 }
253 257
258 if (!vma)
259 cookie = INVALID_COOKIE;
260
254 return cookie; 261 return cookie;
255} 262}
256 263
257 264
258static unsigned long last_cookie = ~0UL; 265static unsigned long last_cookie = INVALID_COOKIE;
259 266
260static void add_cpu_switch(int i) 267static void add_cpu_switch(int i)
261{ 268{
262 add_event_entry(ESCAPE_CODE); 269 add_event_entry(ESCAPE_CODE);
263 add_event_entry(CPU_SWITCH_CODE); 270 add_event_entry(CPU_SWITCH_CODE);
264 add_event_entry(i); 271 add_event_entry(i);
265 last_cookie = ~0UL; 272 last_cookie = INVALID_COOKIE;
266} 273}
267 274
268static void add_kernel_ctx_switch(unsigned int in_kernel) 275static void add_kernel_ctx_switch(unsigned int in_kernel)
@@ -317,7 +324,7 @@ static int add_us_sample(struct mm_struct * mm, struct op_sample * s)
317 324
318 cookie = lookup_dcookie(mm, s->eip, &offset); 325 cookie = lookup_dcookie(mm, s->eip, &offset);
319 326
320 if (!cookie) { 327 if (cookie == INVALID_COOKIE) {
321 atomic_inc(&oprofile_stats.sample_lost_no_mapping); 328 atomic_inc(&oprofile_stats.sample_lost_no_mapping);
322 return 0; 329 return 0;
323 } 330 }
diff --git a/drivers/oprofile/event_buffer.h b/drivers/oprofile/event_buffer.h
index 442aaad391e0..018023630599 100644
--- a/drivers/oprofile/event_buffer.h
+++ b/drivers/oprofile/event_buffer.h
@@ -35,6 +35,9 @@ void wake_up_buffer_waiter(void);
35#define TRACE_BEGIN_CODE 8 35#define TRACE_BEGIN_CODE 8
36#define TRACE_END_CODE 9 36#define TRACE_END_CODE 9
37 37
38#define INVALID_COOKIE ~0UL
39#define NO_COOKIE 0UL
40
38/* add data to the event buffer */ 41/* add data to the event buffer */
39void add_event_entry(unsigned long data); 42void add_event_entry(unsigned long data);
40 43