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perf/urgent fixes: 

User visible:
 
 - Fix libtraceevent string handling in heterogeneous arch environments (Kapileshwar Singh)
 
 - Avoid infinite loop at buildid processing with no samples in 'perf record' (Mark Rutland)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  - Fix libtraceevent string handling in heterogeneous arch environments. (Kapileshwar Singh)

  - Avoid infinite loop at buildid processing with no samples in 'perf record'. (Mark Rutland)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-09-23 09:41:09 +02:00
parent f73e22ab45 c2e4b24ff8
commit d0d0313c2a
2 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
tools/lib/traceevent/event-parse.c
View File

@ -3795,7 +3795,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
struct format_field *field;
struct printk_map *printk;
long long val, fval;
unsigned long addr;
unsigned long long addr;
char *str;
unsigned char *hex;
int print;
@ -3828,13 +3828,30 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
*/
if (!(field->flags & FIELD_IS_ARRAY) &&
field->size == pevent->long_size) {
addr = *(unsigned long *)(data + field->offset);
/* Handle heterogeneous recording and processing
* architectures
*
* CASE I:
* Traces recorded on 32-bit devices (32-bit
* addressing) and processed on 64-bit devices:
* In this case, only 32 bits should be read.
*
* CASE II:
* Traces recorded on 64 bit devices and processed
* on 32-bit devices:
* In this case, 64 bits must be read.
*/
addr = (pevent->long_size == 8) ?
*(unsigned long long *)(data + field->offset) :
(unsigned long long)*(unsigned int *)(data + field->offset);
/* Check if it matches a print format */
printk = find_printk(pevent, addr);
if (printk)
trace_seq_puts(s, printk->printk);
else
trace_seq_printf(s, "%lx", addr);
trace_seq_printf(s, "%llx", addr);
break;
}
str = malloc(len + 1);

5
tools/perf/util/session.c
View File

@ -1580,7 +1580,10 @@ static int __perf_session__process_events(struct perf_session *session,
file_offset = page_offset;
head = data_offset - page_offset;
if (data_size && (data_offset + data_size < file_size))
if (data_size == 0)
goto out;
if (data_offset + data_size < file_size)
file_size = data_offset + data_size;
ui_progress__init(&prog, file_size, "Processing events...");