perf record: Enable the enable_on_exec flag if record forks the target

[pandora-kernel.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index bed175d..962cdbf 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -225,7 +225,7 @@ static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int n
        return h_attr;
 }
 
-static void create_counter(int counter, int cpu, pid_t pid)
+static void create_counter(int counter, int cpu, pid_t pid, bool forks)
 {
        char *filter = filters[counter];
        struct perf_event_attr *attr = attrs + counter;
@@ -277,6 +277,9 @@ static void create_counter(int counter, int cpu, pid_t pid)
        attr->inherit           = inherit;
        attr->disabled          = 1;
 
+       if (forks)
+               attr->enable_on_exec = 1;
+
 try_again:
        fd[nr_cpu][counter] = sys_perf_event_open(attr, pid, cpu, group_fd, 0);
 
@@ -381,13 +384,13 @@ try_again:
        ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_ENABLE);
 }
 
-static void open_counters(int cpu, pid_t pid)
+static void open_counters(int cpu, pid_t pid, bool forks)
 {
        int counter;
 
        group_fd = -1;
        for (counter = 0; counter < nr_counters; counter++)
-               create_counter(counter, cpu, pid);
+               create_counter(counter, cpu, pid, forks);
 
        nr_cpu++;
 }
@@ -547,11 +550,11 @@ static int __cmd_record(int argc, const char **argv)
 
 
        if ((!system_wide && !inherit) || profile_cpu != -1) {
-               open_counters(profile_cpu, target_pid);
+               open_counters(profile_cpu, target_pid, forks);
        } else {
                nr_cpus = read_cpu_map();
                for (i = 0; i < nr_cpus; i++)
-                       open_counters(cpumap[i], target_pid);
+                       open_counters(cpumap[i], target_pid, forks);
        }
 
        if (file_new) {