Merge branch 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf
* 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf: (31 commits)
perf_counter tools: Give perf top inherit option
perf_counter tools: Fix vmlinux symbol generation breakage
perf_counter: Detect debugfs location
perf_counter: Add tracepoint support to perf list, perf stat
perf symbol: C++ demangling
perf: avoid structure size confusion by using a fixed size
perf_counter: Fix throttle/unthrottle event logging
perf_counter: Improve perf stat and perf record option parsing
perf_counter: PERF_SAMPLE_ID and inherited counters
perf_counter: Plug more stack leaks
perf: Fix stack data leak
perf_counter: Remove unused variables
perf_counter: Make call graph option consistent
perf_counter: Add perf record option to log addresses
perf_counter: Log vfork as a fork event
perf_counter: Synthesize VDSO mmap event
perf_counter: Make sure we dont leak kernel memory to userspace
perf_counter tools: Fix index boundary check
perf_counter: Fix the tracepoint channel to perfcounters
perf_counter, x86: Extend perf_counter Pentium M support
...
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 36c3dc7..a7aa8f9 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -66,6 +66,52 @@
};
/*
+ * Not sure about some of these
+ */
+static const u64 p6_perfmon_event_map[] =
+{
+ [PERF_COUNT_HW_CPU_CYCLES] = 0x0079,
+ [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0000,
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x0000,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
+ [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
+ [PERF_COUNT_HW_BUS_CYCLES] = 0x0062,
+};
+
+static u64 p6_pmu_event_map(int event)
+{
+ return p6_perfmon_event_map[event];
+}
+
+/*
+ * Counter setting that is specified not to count anything.
+ * We use this to effectively disable a counter.
+ *
+ * L2_RQSTS with 0 MESI unit mask.
+ */
+#define P6_NOP_COUNTER 0x0000002EULL
+
+static u64 p6_pmu_raw_event(u64 event)
+{
+#define P6_EVNTSEL_EVENT_MASK 0x000000FFULL
+#define P6_EVNTSEL_UNIT_MASK 0x0000FF00ULL
+#define P6_EVNTSEL_EDGE_MASK 0x00040000ULL
+#define P6_EVNTSEL_INV_MASK 0x00800000ULL
+#define P6_EVNTSEL_COUNTER_MASK 0xFF000000ULL
+
+#define P6_EVNTSEL_MASK \
+ (P6_EVNTSEL_EVENT_MASK | \
+ P6_EVNTSEL_UNIT_MASK | \
+ P6_EVNTSEL_EDGE_MASK | \
+ P6_EVNTSEL_INV_MASK | \
+ P6_EVNTSEL_COUNTER_MASK)
+
+ return event & P6_EVNTSEL_MASK;
+}
+
+
+/*
* Intel PerfMon v3. Used on Core2 and later.
*/
static const u64 intel_perfmon_event_map[] =
@@ -666,6 +712,7 @@
{
struct perf_counter_attr *attr = &counter->attr;
struct hw_perf_counter *hwc = &counter->hw;
+ u64 config;
int err;
if (!x86_pmu_initialized())
@@ -718,14 +765,40 @@
if (attr->config >= x86_pmu.max_events)
return -EINVAL;
+
/*
* The generic map:
*/
- hwc->config |= x86_pmu.event_map(attr->config);
+ config = x86_pmu.event_map(attr->config);
+
+ if (config == 0)
+ return -ENOENT;
+
+ if (config == -1LL)
+ return -EINVAL;
+
+ hwc->config |= config;
return 0;
}
+static void p6_pmu_disable_all(void)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ u64 val;
+
+ if (!cpuc->enabled)
+ return;
+
+ cpuc->enabled = 0;
+ barrier();
+
+ /* p6 only has one enable register */
+ rdmsrl(MSR_P6_EVNTSEL0, val);
+ val &= ~ARCH_PERFMON_EVENTSEL0_ENABLE;
+ wrmsrl(MSR_P6_EVNTSEL0, val);
+}
+
static void intel_pmu_disable_all(void)
{
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
@@ -767,6 +840,23 @@
return x86_pmu.disable_all();
}
+static void p6_pmu_enable_all(void)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ unsigned long val;
+
+ if (cpuc->enabled)
+ return;
+
+ cpuc->enabled = 1;
+ barrier();
+
+ /* p6 only has one enable register */
+ rdmsrl(MSR_P6_EVNTSEL0, val);
+ val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
+ wrmsrl(MSR_P6_EVNTSEL0, val);
+}
+
static void intel_pmu_enable_all(void)
{
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl);
@@ -784,13 +874,13 @@
barrier();
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ struct perf_counter *counter = cpuc->counters[idx];
u64 val;
if (!test_bit(idx, cpuc->active_mask))
continue;
- rdmsrl(MSR_K7_EVNTSEL0 + idx, val);
- if (val & ARCH_PERFMON_EVENTSEL0_ENABLE)
- continue;
+
+ val = counter->hw.config;
val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
}
@@ -819,16 +909,13 @@
static inline void x86_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
{
- int err;
- err = checking_wrmsrl(hwc->config_base + idx,
+ (void)checking_wrmsrl(hwc->config_base + idx,
hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE);
}
static inline void x86_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
- int err;
- err = checking_wrmsrl(hwc->config_base + idx,
- hwc->config);
+ (void)checking_wrmsrl(hwc->config_base + idx, hwc->config);
}
static inline void
@@ -836,13 +923,24 @@
{
int idx = __idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, mask;
- int err;
mask = 0xfULL << (idx * 4);
rdmsrl(hwc->config_base, ctrl_val);
ctrl_val &= ~mask;
- err = checking_wrmsrl(hwc->config_base, ctrl_val);
+ (void)checking_wrmsrl(hwc->config_base, ctrl_val);
+}
+
+static inline void
+p6_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ u64 val = P6_NOP_COUNTER;
+
+ if (cpuc->enabled)
+ val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
+
+ (void)checking_wrmsrl(hwc->config_base + idx, val);
}
static inline void
@@ -943,6 +1041,19 @@
err = checking_wrmsrl(hwc->config_base, ctrl_val);
}
+static void p6_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
+{
+ struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
+ u64 val;
+
+ val = hwc->config;
+ if (cpuc->enabled)
+ val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
+
+ (void)checking_wrmsrl(hwc->config_base + idx, val);
+}
+
+
static void intel_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
{
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
@@ -959,8 +1070,6 @@
if (cpuc->enabled)
x86_pmu_enable_counter(hwc, idx);
- else
- x86_pmu_disable_counter(hwc, idx);
}
static int
@@ -1176,6 +1285,49 @@
local_irq_restore(flags);
}
+static int p6_pmu_handle_irq(struct pt_regs *regs)
+{
+ struct perf_sample_data data;
+ struct cpu_hw_counters *cpuc;
+ struct perf_counter *counter;
+ struct hw_perf_counter *hwc;
+ int idx, handled = 0;
+ u64 val;
+
+ data.regs = regs;
+ data.addr = 0;
+
+ cpuc = &__get_cpu_var(cpu_hw_counters);
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ counter = cpuc->counters[idx];
+ hwc = &counter->hw;
+
+ val = x86_perf_counter_update(counter, hwc, idx);
+ if (val & (1ULL << (x86_pmu.counter_bits - 1)))
+ continue;
+
+ /*
+ * counter overflow
+ */
+ handled = 1;
+ data.period = counter->hw.last_period;
+
+ if (!x86_perf_counter_set_period(counter, hwc, idx))
+ continue;
+
+ if (perf_counter_overflow(counter, 1, &data))
+ p6_pmu_disable_counter(hwc, idx);
+ }
+
+ if (handled)
+ inc_irq_stat(apic_perf_irqs);
+
+ return handled;
+}
/*
* This handler is triggered by the local APIC, so the APIC IRQ handling
@@ -1185,14 +1337,13 @@
{
struct perf_sample_data data;
struct cpu_hw_counters *cpuc;
- int bit, cpu, loops;
+ int bit, loops;
u64 ack, status;
data.regs = regs;
data.addr = 0;
- cpu = smp_processor_id();
- cpuc = &per_cpu(cpu_hw_counters, cpu);
+ cpuc = &__get_cpu_var(cpu_hw_counters);
perf_disable();
status = intel_pmu_get_status();
@@ -1249,14 +1400,13 @@
struct cpu_hw_counters *cpuc;
struct perf_counter *counter;
struct hw_perf_counter *hwc;
- int cpu, idx, handled = 0;
+ int idx, handled = 0;
u64 val;
data.regs = regs;
data.addr = 0;
- cpu = smp_processor_id();
- cpuc = &per_cpu(cpu_hw_counters, cpu);
+ cpuc = &__get_cpu_var(cpu_hw_counters);
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
if (!test_bit(idx, cpuc->active_mask))
@@ -1353,6 +1503,32 @@
.priority = 1
};
+static struct x86_pmu p6_pmu = {
+ .name = "p6",
+ .handle_irq = p6_pmu_handle_irq,
+ .disable_all = p6_pmu_disable_all,
+ .enable_all = p6_pmu_enable_all,
+ .enable = p6_pmu_enable_counter,
+ .disable = p6_pmu_disable_counter,
+ .eventsel = MSR_P6_EVNTSEL0,
+ .perfctr = MSR_P6_PERFCTR0,
+ .event_map = p6_pmu_event_map,
+ .raw_event = p6_pmu_raw_event,
+ .max_events = ARRAY_SIZE(p6_perfmon_event_map),
+ .max_period = (1ULL << 31) - 1,
+ .version = 0,
+ .num_counters = 2,
+ /*
+ * Counters have 40 bits implemented. However they are designed such
+ * that bits [32-39] are sign extensions of bit 31. As such the
+ * effective width of a counter for P6-like PMU is 32 bits only.
+ *
+ * See IA-32 Intel Architecture Software developer manual Vol 3B
+ */
+ .counter_bits = 32,
+ .counter_mask = (1ULL << 32) - 1,
+};
+
static struct x86_pmu intel_pmu = {
.name = "Intel",
.handle_irq = intel_pmu_handle_irq,
@@ -1392,6 +1568,37 @@
.max_period = (1ULL << 47) - 1,
};
+static int p6_pmu_init(void)
+{
+ switch (boot_cpu_data.x86_model) {
+ case 1:
+ case 3: /* Pentium Pro */
+ case 5:
+ case 6: /* Pentium II */
+ case 7:
+ case 8:
+ case 11: /* Pentium III */
+ break;
+ case 9:
+ case 13:
+ /* Pentium M */
+ break;
+ default:
+ pr_cont("unsupported p6 CPU model %d ",
+ boot_cpu_data.x86_model);
+ return -ENODEV;
+ }
+
+ if (!cpu_has_apic) {
+ pr_info("no Local APIC, try rebooting with lapic");
+ return -ENODEV;
+ }
+
+ x86_pmu = p6_pmu;
+
+ return 0;
+}
+
static int intel_pmu_init(void)
{
union cpuid10_edx edx;
@@ -1400,8 +1607,14 @@
unsigned int ebx;
int version;
- if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON))
+ if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
+ /* check for P6 processor family */
+ if (boot_cpu_data.x86 == 6) {
+ return p6_pmu_init();
+ } else {
return -ENODEV;
+ }
+ }
/*
* Check whether the Architectural PerfMon supports
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 5e970c7..bd15d7a 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -120,8 +120,9 @@
PERF_SAMPLE_ID = 1U << 6,
PERF_SAMPLE_CPU = 1U << 7,
PERF_SAMPLE_PERIOD = 1U << 8,
+ PERF_SAMPLE_STREAM_ID = 1U << 9,
- PERF_SAMPLE_MAX = 1U << 9, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 10, /* non-ABI */
};
/*
@@ -312,16 +313,7 @@
* struct perf_event_header header;
* u64 time;
* u64 id;
- * u64 sample_period;
- * };
- */
- PERF_EVENT_PERIOD = 4,
-
- /*
- * struct {
- * struct perf_event_header header;
- * u64 time;
- * u64 id;
+ * u64 stream_id;
* };
*/
PERF_EVENT_THROTTLE = 5,
@@ -356,6 +348,7 @@
* { u64 time; } && PERF_SAMPLE_TIME
* { u64 addr; } && PERF_SAMPLE_ADDR
* { u64 id; } && PERF_SAMPLE_ID
+ * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
* { u32 cpu, res; } && PERF_SAMPLE_CPU
* { u64 period; } && PERF_SAMPLE_PERIOD
*
diff --git a/init/Kconfig b/init/Kconfig
index 1ce05a4..cb2c092 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -962,7 +962,7 @@
config EVENT_PROFILE
bool "Tracepoint profile sources"
- depends on PERF_COUNTERS && EVENT_TRACER
+ depends on PERF_COUNTERS && EVENT_TRACING
default y
endmenu
diff --git a/kernel/fork.c b/kernel/fork.c
index bd29592..9b42695 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1407,14 +1407,11 @@
if (clone_flags & CLONE_VFORK) {
p->vfork_done = &vfork;
init_completion(&vfork);
- } else if (!(clone_flags & CLONE_VM)) {
- /*
- * vfork will do an exec which will call
- * set_task_comm()
- */
- perf_counter_fork(p);
}
+ if (!(clone_flags & CLONE_THREAD))
+ perf_counter_fork(p);
+
audit_finish_fork(p);
tracehook_report_clone(regs, clone_flags, nr, p);
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 7bc888d..9509310 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -146,6 +146,28 @@
}
}
+static void unclone_ctx(struct perf_counter_context *ctx)
+{
+ if (ctx->parent_ctx) {
+ put_ctx(ctx->parent_ctx);
+ ctx->parent_ctx = NULL;
+ }
+}
+
+/*
+ * If we inherit counters we want to return the parent counter id
+ * to userspace.
+ */
+static u64 primary_counter_id(struct perf_counter *counter)
+{
+ u64 id = counter->id;
+
+ if (counter->parent)
+ id = counter->parent->id;
+
+ return id;
+}
+
/*
* Get the perf_counter_context for a task and lock it.
* This has to cope with with the fact that until it is locked,
@@ -1288,7 +1310,6 @@
#define MAX_INTERRUPTS (~0ULL)
static void perf_log_throttle(struct perf_counter *counter, int enable);
-static void perf_log_period(struct perf_counter *counter, u64 period);
static void perf_adjust_period(struct perf_counter *counter, u64 events)
{
@@ -1307,8 +1328,6 @@
if (!sample_period)
sample_period = 1;
- perf_log_period(counter, sample_period);
-
hwc->sample_period = sample_period;
}
@@ -1463,10 +1482,8 @@
/*
* Unclone this context if we enabled any counter.
*/
- if (enabled && ctx->parent_ctx) {
- put_ctx(ctx->parent_ctx);
- ctx->parent_ctx = NULL;
- }
+ if (enabled)
+ unclone_ctx(ctx);
spin_unlock(&ctx->lock);
@@ -1526,7 +1543,6 @@
static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
{
- struct perf_counter_context *parent_ctx;
struct perf_counter_context *ctx;
struct perf_cpu_context *cpuctx;
struct task_struct *task;
@@ -1586,11 +1602,7 @@
retry:
ctx = perf_lock_task_context(task, &flags);
if (ctx) {
- parent_ctx = ctx->parent_ctx;
- if (parent_ctx) {
- put_ctx(parent_ctx);
- ctx->parent_ctx = NULL; /* no longer a clone */
- }
+ unclone_ctx(ctx);
spin_unlock_irqrestore(&ctx->lock, flags);
}
@@ -1704,7 +1716,7 @@
values[n++] = counter->total_time_running +
atomic64_read(&counter->child_total_time_running);
if (counter->attr.read_format & PERF_FORMAT_ID)
- values[n++] = counter->id;
+ values[n++] = primary_counter_id(counter);
mutex_unlock(&counter->child_mutex);
if (count < n * sizeof(u64))
@@ -1811,8 +1823,6 @@
counter->attr.sample_freq = value;
} else {
- perf_log_period(counter, value);
-
counter->attr.sample_period = value;
counter->hw.sample_period = value;
}
@@ -2661,6 +2671,9 @@
if (sample_type & PERF_SAMPLE_ID)
header.size += sizeof(u64);
+ if (sample_type & PERF_SAMPLE_STREAM_ID)
+ header.size += sizeof(u64);
+
if (sample_type & PERF_SAMPLE_CPU) {
header.size += sizeof(cpu_entry);
@@ -2704,7 +2717,13 @@
if (sample_type & PERF_SAMPLE_ADDR)
perf_output_put(&handle, data->addr);
- if (sample_type & PERF_SAMPLE_ID)
+ if (sample_type & PERF_SAMPLE_ID) {
+ u64 id = primary_counter_id(counter);
+
+ perf_output_put(&handle, id);
+ }
+
+ if (sample_type & PERF_SAMPLE_STREAM_ID)
perf_output_put(&handle, counter->id);
if (sample_type & PERF_SAMPLE_CPU)
@@ -2727,7 +2746,7 @@
if (sub != counter)
sub->pmu->read(sub);
- group_entry.id = sub->id;
+ group_entry.id = primary_counter_id(sub);
group_entry.counter = atomic64_read(&sub->count);
perf_output_put(&handle, group_entry);
@@ -2787,15 +2806,8 @@
}
if (counter->attr.read_format & PERF_FORMAT_ID) {
- u64 id;
-
event.header.size += sizeof(u64);
- if (counter->parent)
- id = counter->parent->id;
- else
- id = counter->id;
-
- event.format[i++] = id;
+ event.format[i++] = primary_counter_id(counter);
}
ret = perf_output_begin(&handle, counter, event.header.size, 0, 0);
@@ -2896,8 +2908,11 @@
.event = {
.header = {
.type = PERF_EVENT_FORK,
+ .misc = 0,
.size = sizeof(fork_event.event),
},
+ /* .pid */
+ /* .ppid */
},
};
@@ -2969,8 +2984,10 @@
struct perf_cpu_context *cpuctx;
struct perf_counter_context *ctx;
unsigned int size;
- char *comm = comm_event->task->comm;
+ char comm[TASK_COMM_LEN];
+ memset(comm, 0, sizeof(comm));
+ strncpy(comm, comm_event->task->comm, sizeof(comm));
size = ALIGN(strlen(comm)+1, sizeof(u64));
comm_event->comm = comm;
@@ -3005,8 +3022,16 @@
comm_event = (struct perf_comm_event){
.task = task,
+ /* .comm */
+ /* .comm_size */
.event = {
- .header = { .type = PERF_EVENT_COMM, },
+ .header = {
+ .type = PERF_EVENT_COMM,
+ .misc = 0,
+ /* .size */
+ },
+ /* .pid */
+ /* .tid */
},
};
@@ -3089,8 +3114,15 @@
char *buf = NULL;
const char *name;
+ memset(tmp, 0, sizeof(tmp));
+
if (file) {
- buf = kzalloc(PATH_MAX, GFP_KERNEL);
+ /*
+ * d_path works from the end of the buffer backwards, so we
+ * need to add enough zero bytes after the string to handle
+ * the 64bit alignment we do later.
+ */
+ buf = kzalloc(PATH_MAX + sizeof(u64), GFP_KERNEL);
if (!buf) {
name = strncpy(tmp, "//enomem", sizeof(tmp));
goto got_name;
@@ -3101,9 +3133,11 @@
goto got_name;
}
} else {
- name = arch_vma_name(mmap_event->vma);
- if (name)
+ if (arch_vma_name(mmap_event->vma)) {
+ name = strncpy(tmp, arch_vma_name(mmap_event->vma),
+ sizeof(tmp));
goto got_name;
+ }
if (!vma->vm_mm) {
name = strncpy(tmp, "[vdso]", sizeof(tmp));
@@ -3148,8 +3182,16 @@
mmap_event = (struct perf_mmap_event){
.vma = vma,
+ /* .file_name */
+ /* .file_size */
.event = {
- .header = { .type = PERF_EVENT_MMAP, },
+ .header = {
+ .type = PERF_EVENT_MMAP,
+ .misc = 0,
+ /* .size */
+ },
+ /* .pid */
+ /* .tid */
.start = vma->vm_start,
.len = vma->vm_end - vma->vm_start,
.pgoff = vma->vm_pgoff,
@@ -3160,49 +3202,6 @@
}
/*
- * Log sample_period changes so that analyzing tools can re-normalize the
- * event flow.
- */
-
-struct freq_event {
- struct perf_event_header header;
- u64 time;
- u64 id;
- u64 period;
-};
-
-static void perf_log_period(struct perf_counter *counter, u64 period)
-{
- struct perf_output_handle handle;
- struct freq_event event;
- int ret;
-
- if (counter->hw.sample_period == period)
- return;
-
- if (counter->attr.sample_type & PERF_SAMPLE_PERIOD)
- return;
-
- event = (struct freq_event) {
- .header = {
- .type = PERF_EVENT_PERIOD,
- .misc = 0,
- .size = sizeof(event),
- },
- .time = sched_clock(),
- .id = counter->id,
- .period = period,
- };
-
- ret = perf_output_begin(&handle, counter, sizeof(event), 1, 0);
- if (ret)
- return;
-
- perf_output_put(&handle, event);
- perf_output_end(&handle);
-}
-
-/*
* IRQ throttle logging
*/
@@ -3215,16 +3214,21 @@
struct perf_event_header header;
u64 time;
u64 id;
+ u64 stream_id;
} throttle_event = {
.header = {
- .type = PERF_EVENT_THROTTLE + 1,
+ .type = PERF_EVENT_THROTTLE,
.misc = 0,
.size = sizeof(throttle_event),
},
- .time = sched_clock(),
- .id = counter->id,
+ .time = sched_clock(),
+ .id = primary_counter_id(counter),
+ .stream_id = counter->id,
};
+ if (enable)
+ throttle_event.header.type = PERF_EVENT_UNTHROTTLE;
+
ret = perf_output_begin(&handle, counter, sizeof(throttle_event), 1, 0);
if (ret)
return;
@@ -3672,7 +3676,7 @@
void perf_tpcounter_event(int event_id)
{
struct perf_sample_data data = {
- .regs = get_irq_regs();
+ .regs = get_irq_regs(),
.addr = 0,
};
@@ -3688,16 +3692,12 @@
static void tp_perf_counter_destroy(struct perf_counter *counter)
{
- ftrace_profile_disable(perf_event_id(&counter->attr));
+ ftrace_profile_disable(counter->attr.config);
}
static const struct pmu *tp_perf_counter_init(struct perf_counter *counter)
{
- int event_id = perf_event_id(&counter->attr);
- int ret;
-
- ret = ftrace_profile_enable(event_id);
- if (ret)
+ if (ftrace_profile_enable(counter->attr.config))
return NULL;
counter->destroy = tp_perf_counter_destroy;
@@ -4256,15 +4256,12 @@
*/
spin_lock(&child_ctx->lock);
child->perf_counter_ctxp = NULL;
- if (child_ctx->parent_ctx) {
- /*
- * This context is a clone; unclone it so it can't get
- * swapped to another process while we're removing all
- * the counters from it.
- */
- put_ctx(child_ctx->parent_ctx);
- child_ctx->parent_ctx = NULL;
- }
+ /*
+ * If this context is a clone; unclone it so it can't get
+ * swapped to another process while we're removing all
+ * the counters from it.
+ */
+ unclone_ctx(child_ctx);
spin_unlock(&child_ctx->lock);
local_irq_restore(flags);
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 8aa3f8c..e72e931 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -24,6 +24,9 @@
--dsos=::
Only consider symbols in these dsos. CSV that understands
file://filename entries.
+-n
+--show-nr-samples
+ Show the number of samples for each symbol
-C::
--comms=::
Only consider symbols in these comms. CSV that understands
@@ -33,6 +36,18 @@
Only consider these symbols. CSV that understands
file://filename entries.
+-w::
+--field-width=::
+ Force each column width to the provided list, for large terminal
+ readability.
+
+-t::
+--field-separator=::
+
+ Use a special separator character and don't pad with spaces, replacing
+ all occurances of this separator in symbol names (and other output)
+ with a '.' character, that thus it's the only non valid separator.
+
SEE ALSO
--------
linkperf:perf-stat[1]
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 7822b3d..a5e9b87 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -345,7 +345,7 @@
BUILTIN_OBJS += builtin-top.o
PERFLIBS = $(LIB_FILE)
-EXTLIBS =
+EXTLIBS = -lbfd
#
# Platform specific tweaks
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 5f9eefe..1dba568 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -74,20 +74,12 @@
u32 pid, ppid;
};
-struct period_event {
- struct perf_event_header header;
- u64 time;
- u64 id;
- u64 sample_period;
-};
-
typedef union event_union {
struct perf_event_header header;
struct ip_event ip;
struct mmap_event mmap;
struct comm_event comm;
struct fork_event fork;
- struct period_event period;
} event_t;
@@ -998,19 +990,6 @@
}
static int
-process_period_event(event_t *event, unsigned long offset, unsigned long head)
-{
- dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->period.time,
- event->period.id,
- event->period.sample_period);
-
- return 0;
-}
-
-static int
process_event(event_t *event, unsigned long offset, unsigned long head)
{
switch (event->header.type) {
@@ -1025,9 +1004,6 @@
case PERF_EVENT_FORK:
return process_fork_event(event, offset, head);
-
- case PERF_EVENT_PERIOD:
- return process_period_event(event, offset, head);
/*
* We dont process them right now but they are fine:
*/
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4ef78a5..6da0992 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -43,6 +43,7 @@
static int verbose = 0;
static int inherit_stat = 0;
static int no_samples = 0;
+static int sample_address = 0;
static long samples;
static struct timeval last_read;
@@ -313,6 +314,10 @@
if (*pbf == 'x') { /* vm_exec */
char *execname = strchr(bf, '/');
+ /* Catch VDSO */
+ if (execname == NULL)
+ execname = strstr(bf, "[vdso]");
+
if (execname == NULL)
continue;
@@ -401,6 +406,9 @@
if (inherit_stat)
attr->inherit_stat = 1;
+ if (sample_address)
+ attr->sample_type |= PERF_SAMPLE_ADDR;
+
if (call_graph)
attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
@@ -645,6 +653,8 @@
"be more verbose (show counter open errors, etc)"),
OPT_BOOLEAN('s', "stat", &inherit_stat,
"per thread counts"),
+ OPT_BOOLEAN('d', "data", &sample_address,
+ "Sample addresses"),
OPT_BOOLEAN('n', "no-samples", &no_samples,
"don't sample"),
OPT_END()
@@ -654,7 +664,8 @@
{
int counter;
- argc = parse_options(argc, argv, options, record_usage, 0);
+ argc = parse_options(argc, argv, options, record_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && target_pid == -1 && !system_wide)
usage_with_options(record_usage, options);
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 4e5cc26..b20a4b6 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -33,8 +33,10 @@
static char default_sort_order[] = "comm,dso";
static char *sort_order = default_sort_order;
-static char *dso_list_str, *comm_list_str, *sym_list_str;
+static char *dso_list_str, *comm_list_str, *sym_list_str,
+ *col_width_list_str;
static struct strlist *dso_list, *comm_list, *sym_list;
+static char *field_sep;
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
@@ -49,6 +51,7 @@
static int modules;
static int full_paths;
+static int show_nr_samples;
static unsigned long page_size;
static unsigned long mmap_window = 32;
@@ -98,13 +101,6 @@
u32 pid, ppid;
};
-struct period_event {
- struct perf_event_header header;
- u64 time;
- u64 id;
- u64 sample_period;
-};
-
struct lost_event {
struct perf_event_header header;
u64 id;
@@ -124,11 +120,37 @@
struct mmap_event mmap;
struct comm_event comm;
struct fork_event fork;
- struct period_event period;
struct lost_event lost;
struct read_event read;
} event_t;
+static int repsep_fprintf(FILE *fp, const char *fmt, ...)
+{
+ int n;
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (!field_sep)
+ n = vfprintf(fp, fmt, ap);
+ else {
+ char *bf = NULL;
+ n = vasprintf(&bf, fmt, ap);
+ if (n > 0) {
+ char *sep = bf;
+ while (1) {
+ sep = strchr(sep, *field_sep);
+ if (sep == NULL)
+ break;
+ *sep = '.';
+ }
+ }
+ fputs(bf, fp);
+ free(bf);
+ }
+ va_end(ap);
+ return n;
+}
+
static LIST_HEAD(dsos);
static struct dso *kernel_dso;
static struct dso *vdso;
@@ -360,12 +382,28 @@
return self;
}
+static unsigned int dsos__col_width,
+ comms__col_width,
+ threads__col_width;
+
static int thread__set_comm(struct thread *self, const char *comm)
{
if (self->comm)
free(self->comm);
self->comm = strdup(comm);
- return self->comm ? 0 : -ENOMEM;
+ if (!self->comm)
+ return -ENOMEM;
+
+ if (!col_width_list_str && !field_sep &&
+ (!comm_list || strlist__has_entry(comm_list, comm))) {
+ unsigned int slen = strlen(comm);
+ if (slen > comms__col_width) {
+ comms__col_width = slen;
+ threads__col_width = slen + 6;
+ }
+ }
+
+ return 0;
}
static size_t thread__fprintf(struct thread *self, FILE *fp)
@@ -536,7 +574,9 @@
int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
- size_t (*print)(FILE *fp, struct hist_entry *);
+ size_t (*print)(FILE *fp, struct hist_entry *, unsigned int width);
+ unsigned int *width;
+ bool elide;
};
static int64_t cmp_null(void *l, void *r)
@@ -558,15 +598,17 @@
}
static size_t
-sort__thread_print(FILE *fp, struct hist_entry *self)
+sort__thread_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
+ return repsep_fprintf(fp, "%*s:%5d", width - 6,
+ self->thread->comm ?: "", self->thread->pid);
}
static struct sort_entry sort_thread = {
- .header = " Command: Pid",
+ .header = "Command: Pid",
.cmp = sort__thread_cmp,
.print = sort__thread_print,
+ .width = &threads__col_width,
};
/* --sort comm */
@@ -590,16 +632,17 @@
}
static size_t
-sort__comm_print(FILE *fp, struct hist_entry *self)
+sort__comm_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- return fprintf(fp, "%16s", self->thread->comm);
+ return repsep_fprintf(fp, "%*s", width, self->thread->comm);
}
static struct sort_entry sort_comm = {
- .header = " Command",
+ .header = "Command",
.cmp = sort__comm_cmp,
.collapse = sort__comm_collapse,
.print = sort__comm_print,
+ .width = &comms__col_width,
};
/* --sort dso */
@@ -617,18 +660,19 @@
}
static size_t
-sort__dso_print(FILE *fp, struct hist_entry *self)
+sort__dso_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
if (self->dso)
- return fprintf(fp, "%-25s", self->dso->name);
+ return repsep_fprintf(fp, "%-*s", width, self->dso->name);
- return fprintf(fp, "%016llx ", (u64)self->ip);
+ return repsep_fprintf(fp, "%*llx", width, (u64)self->ip);
}
static struct sort_entry sort_dso = {
- .header = "Shared Object ",
+ .header = "Shared Object",
.cmp = sort__dso_cmp,
.print = sort__dso_print,
+ .width = &dsos__col_width,
};
/* --sort symbol */
@@ -648,22 +692,22 @@
}
static size_t
-sort__sym_print(FILE *fp, struct hist_entry *self)
+sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used)
{
size_t ret = 0;
if (verbose)
- ret += fprintf(fp, "%#018llx ", (u64)self->ip);
+ ret += repsep_fprintf(fp, "%#018llx ", (u64)self->ip);
+ ret += repsep_fprintf(fp, "[%c] ", self->level);
if (self->sym) {
- ret += fprintf(fp, "[%c] %s",
- self->dso == kernel_dso ? 'k' :
- self->dso == hypervisor_dso ? 'h' : '.', self->sym->name);
+ ret += repsep_fprintf(fp, "%s", self->sym->name);
if (self->sym->module)
- ret += fprintf(fp, "\t[%s]", self->sym->module->name);
+ ret += repsep_fprintf(fp, "\t[%s]",
+ self->sym->module->name);
} else {
- ret += fprintf(fp, "%#016llx", (u64)self->ip);
+ ret += repsep_fprintf(fp, "%#016llx", (u64)self->ip);
}
return ret;
@@ -690,19 +734,19 @@
}
static size_t
-sort__parent_print(FILE *fp, struct hist_entry *self)
+sort__parent_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
- size_t ret = 0;
-
- ret += fprintf(fp, "%-20s", self->parent ? self->parent->name : "[other]");
-
- return ret;
+ return repsep_fprintf(fp, "%-*s", width,
+ self->parent ? self->parent->name : "[other]");
}
+static unsigned int parent_symbol__col_width;
+
static struct sort_entry sort_parent = {
- .header = "Parent symbol ",
+ .header = "Parent symbol",
.cmp = sort__parent_cmp,
.print = sort__parent_print,
+ .width = &parent_symbol__col_width,
};
static int sort__need_collapse = 0;
@@ -967,17 +1011,25 @@
return 0;
if (total_samples)
- ret = percent_color_fprintf(fp, " %6.2f%%",
- (self->count * 100.0) / total_samples);
+ ret = percent_color_fprintf(fp,
+ field_sep ? "%.2f" : " %6.2f%%",
+ (self->count * 100.0) / total_samples);
else
- ret = fprintf(fp, "%12Ld ", self->count);
+ ret = fprintf(fp, field_sep ? "%lld" : "%12lld ", self->count);
+
+ if (show_nr_samples) {
+ if (field_sep)
+ fprintf(fp, "%c%lld", *field_sep, self->count);
+ else
+ fprintf(fp, "%11lld", self->count);
+ }
list_for_each_entry(se, &hist_entry__sort_list, list) {
- if (exclude_other && (se == &sort_parent))
+ if (se->elide)
continue;
- fprintf(fp, " ");
- ret += se->print(fp, self);
+ fprintf(fp, "%s", field_sep ?: " ");
+ ret += se->print(fp, self, se->width ? *se->width : 0);
}
ret += fprintf(fp, "\n");
@@ -992,6 +1044,18 @@
*
*/
+static void dso__calc_col_width(struct dso *self)
+{
+ if (!col_width_list_str && !field_sep &&
+ (!dso_list || strlist__has_entry(dso_list, self->name))) {
+ unsigned int slen = strlen(self->name);
+ if (slen > dsos__col_width)
+ dsos__col_width = slen;
+ }
+
+ self->slen_calculated = 1;
+}
+
static struct symbol *
resolve_symbol(struct thread *thread, struct map **mapp,
struct dso **dsop, u64 *ipp)
@@ -1011,6 +1075,14 @@
map = thread__find_map(thread, ip);
if (map != NULL) {
+ /*
+ * We have to do this here as we may have a dso
+ * with no symbol hit that has a name longer than
+ * the ones with symbols sampled.
+ */
+ if (!sort_dso.elide && !map->dso->slen_calculated)
+ dso__calc_col_width(map->dso);
+
if (mapp)
*mapp = map;
got_map:
@@ -1282,35 +1354,67 @@
struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
+ unsigned int width;
+ char *col_width = col_width_list_str;
- fprintf(fp, "\n");
- fprintf(fp, "#\n");
- fprintf(fp, "# (%Ld samples)\n", (u64)total_samples);
+ fprintf(fp, "# Samples: %Ld\n", (u64)total_samples);
fprintf(fp, "#\n");
fprintf(fp, "# Overhead");
+ if (show_nr_samples) {
+ if (field_sep)
+ fprintf(fp, "%cSamples", *field_sep);
+ else
+ fputs(" Samples ", fp);
+ }
list_for_each_entry(se, &hist_entry__sort_list, list) {
- if (exclude_other && (se == &sort_parent))
+ if (se->elide)
continue;
- fprintf(fp, " %s", se->header);
+ if (field_sep) {
+ fprintf(fp, "%c%s", *field_sep, se->header);
+ continue;
+ }
+ width = strlen(se->header);
+ if (se->width) {
+ if (col_width_list_str) {
+ if (col_width) {
+ *se->width = atoi(col_width);
+ col_width = strchr(col_width, ',');
+ if (col_width)
+ ++col_width;
+ }
+ }
+ width = *se->width = max(*se->width, width);
+ }
+ fprintf(fp, " %*s", width, se->header);
}
fprintf(fp, "\n");
+ if (field_sep)
+ goto print_entries;
+
fprintf(fp, "# ........");
+ if (show_nr_samples)
+ fprintf(fp, " ..........");
list_for_each_entry(se, &hist_entry__sort_list, list) {
unsigned int i;
- if (exclude_other && (se == &sort_parent))
+ if (se->elide)
continue;
fprintf(fp, " ");
- for (i = 0; i < strlen(se->header); i++)
+ if (se->width)
+ width = *se->width;
+ else
+ width = strlen(se->header);
+ for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n");
fprintf(fp, "#\n");
+print_entries:
for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
pos = rb_entry(nd, struct hist_entry, rb_node);
ret += hist_entry__fprintf(fp, pos, total_samples);
@@ -1524,19 +1628,6 @@
}
static int
-process_period_event(event_t *event, unsigned long offset, unsigned long head)
-{
- dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->period.time,
- event->period.id,
- event->period.sample_period);
-
- return 0;
-}
-
-static int
process_lost_event(event_t *event, unsigned long offset, unsigned long head)
{
dprintf("%p [%p]: PERF_EVENT_LOST: id:%Ld: lost:%Ld\n",
@@ -1617,9 +1708,6 @@
case PERF_EVENT_FORK:
return process_fork_event(event, offset, head);
- case PERF_EVENT_PERIOD:
- return process_period_event(event, offset, head);
-
case PERF_EVENT_LOST:
return process_lost_event(event, offset, head);
@@ -1883,6 +1971,8 @@
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_BOOLEAN('m', "modules", &modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
+ OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
+ "Show a column with the number of samples"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol, parent"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
@@ -1891,15 +1981,21 @@
"regex filter to identify parent, see: '--sort parent'"),
OPT_BOOLEAN('x', "exclude-other", &exclude_other,
"Only display entries with parent-match"),
- OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type,min_percent",
+ OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
"Display callchains using output_type and min percent threshold. "
- "Default: flat,0", &parse_callchain_opt, callchain_default_opt),
+ "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
"only consider symbols in these dsos"),
OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",
"only consider symbols in these comms"),
OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",
"only consider these symbols"),
+ OPT_STRING('w', "column-widths", &col_width_list_str,
+ "width[,width...]",
+ "don't try to adjust column width, use these fixed values"),
+ OPT_STRING('t', "field-separator", &field_sep, "separator",
+ "separator for columns, no spaces will be added between "
+ "columns '.' is reserved."),
OPT_END()
};
@@ -1919,7 +2015,8 @@
}
static void setup_list(struct strlist **list, const char *list_str,
- const char *list_name)
+ struct sort_entry *se, const char *list_name,
+ FILE *fp)
{
if (list_str) {
*list = strlist__new(true, list_str);
@@ -1928,6 +2025,11 @@
list_name);
exit(129);
}
+ if (strlist__nr_entries(*list) == 1) {
+ fprintf(fp, "# %s: %s\n", list_name,
+ strlist__entry(*list, 0)->s);
+ se->elide = true;
+ }
}
}
@@ -1941,9 +2043,10 @@
setup_sorting();
- if (parent_pattern != default_parent_pattern)
+ if (parent_pattern != default_parent_pattern) {
sort_dimension__add("parent");
- else
+ sort_parent.elide = 1;
+ } else
exclude_other = 0;
/*
@@ -1952,11 +2055,17 @@
if (argc)
usage_with_options(report_usage, options);
- setup_list(&dso_list, dso_list_str, "dso");
- setup_list(&comm_list, comm_list_str, "comm");
- setup_list(&sym_list, sym_list_str, "symbol");
-
setup_pager();
+ setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout);
+ setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout);
+ setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout);
+
+ if (field_sep && *field_sep == '.') {
+ fputs("'.' is the only non valid --field-separator argument\n",
+ stderr);
+ exit(129);
+ }
+
return __cmd_report();
}
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 27921a8..f9510ee 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -511,7 +511,8 @@
{
int status;
- argc = parse_options(argc, argv, options, stat_usage, 0);
+ argc = parse_options(argc, argv, options, stat_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(stat_usage, options);
if (run_count <= 0 || run_count > MAX_RUN)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 95d5c0a..c0a4230 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -58,6 +58,7 @@
static int print_entries = 15;
static int target_pid = -1;
+static int inherit = 0;
static int profile_cpu = -1;
static int nr_cpus = 0;
static unsigned int realtime_prio = 0;
@@ -549,7 +550,7 @@
static void start_counter(int i, int counter)
{
struct perf_counter_attr *attr;
- unsigned int cpu;
+ int cpu;
cpu = profile_cpu;
if (target_pid == -1 && profile_cpu == -1)
@@ -559,6 +560,7 @@
attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
attr->freq = freq;
+ attr->inherit = (cpu < 0) && inherit;
try_again:
fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0);
@@ -685,6 +687,8 @@
"only display functions with more events than this"),
OPT_BOOLEAN('g', "group", &group,
"put the counters into a counter group"),
+ OPT_BOOLEAN('i', "inherit", &inherit,
+ "child tasks inherit counters"),
OPT_STRING('s', "sym-filter", &sym_filter, "pattern",
"only display symbols matchig this pattern"),
OPT_BOOLEAN('z', "zero", &zero,
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index c565678..31982ad 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -12,6 +12,8 @@
#include "util/cache.h"
#include "util/quote.h"
#include "util/run-command.h"
+#include "util/parse-events.h"
+#include "util/string.h"
const char perf_usage_string[] =
"perf [--version] [--help] COMMAND [ARGS]";
@@ -25,6 +27,8 @@
int val;
};
+static char debugfs_mntpt[MAXPATHLEN];
+
static int pager_command_config(const char *var, const char *value, void *data)
{
struct pager_config *c = data;
@@ -56,6 +60,15 @@
}
}
+static void set_debugfs_path(void)
+{
+ char *path;
+
+ path = getenv(PERF_DEBUGFS_ENVIRONMENT);
+ snprintf(debugfs_path, MAXPATHLEN, "%s/%s", path ?: debugfs_mntpt,
+ "tracing/events");
+}
+
static int handle_options(const char*** argv, int* argc, int* envchanged)
{
int handled = 0;
@@ -122,6 +135,22 @@
setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
if (envchanged)
*envchanged = 1;
+ } else if (!strcmp(cmd, "--debugfs-dir")) {
+ if (*argc < 2) {
+ fprintf(stderr, "No directory given for --debugfs-dir.\n");
+ usage(perf_usage_string);
+ }
+ strncpy(debugfs_mntpt, (*argv)[1], MAXPATHLEN);
+ debugfs_mntpt[MAXPATHLEN - 1] = '\0';
+ if (envchanged)
+ *envchanged = 1;
+ (*argv)++;
+ (*argc)--;
+ } else if (!prefixcmp(cmd, "--debugfs-dir=")) {
+ strncpy(debugfs_mntpt, cmd + 14, MAXPATHLEN);
+ debugfs_mntpt[MAXPATHLEN - 1] = '\0';
+ if (envchanged)
+ *envchanged = 1;
} else {
fprintf(stderr, "Unknown option: %s\n", cmd);
usage(perf_usage_string);
@@ -228,6 +257,7 @@
if (use_pager == -1 && p->option & USE_PAGER)
use_pager = 1;
commit_pager_choice();
+ set_debugfs_path();
status = p->fn(argc, argv, prefix);
if (status)
@@ -346,6 +376,49 @@
return done_alias;
}
+/* mini /proc/mounts parser: searching for "^blah /mount/point debugfs" */
+static void get_debugfs_mntpt(void)
+{
+ FILE *file;
+ char fs_type[100];
+ char debugfs[MAXPATHLEN];
+
+ /*
+ * try the standard location
+ */
+ if (valid_debugfs_mount("/sys/kernel/debug/") == 0) {
+ strcpy(debugfs_mntpt, "/sys/kernel/debug/");
+ return;
+ }
+
+ /*
+ * try the sane location
+ */
+ if (valid_debugfs_mount("/debug/") == 0) {
+ strcpy(debugfs_mntpt, "/debug/");
+ return;
+ }
+
+ /*
+ * give up and parse /proc/mounts
+ */
+ file = fopen("/proc/mounts", "r");
+ if (file == NULL)
+ return;
+
+ while (fscanf(file, "%*s %"
+ STR(MAXPATHLEN)
+ "s %99s %*s %*d %*d\n",
+ debugfs, fs_type) == 2) {
+ if (strcmp(fs_type, "debugfs") == 0)
+ break;
+ }
+ fclose(file);
+ if (strcmp(fs_type, "debugfs") == 0) {
+ strncpy(debugfs_mntpt, debugfs, MAXPATHLEN);
+ debugfs_mntpt[MAXPATHLEN - 1] = '\0';
+ }
+}
int main(int argc, const char **argv)
{
@@ -354,7 +427,8 @@
cmd = perf_extract_argv0_path(argv[0]);
if (!cmd)
cmd = "perf-help";
-
+ /* get debugfs mount point from /proc/mounts */
+ get_debugfs_mntpt();
/*
* "perf-xxxx" is the same as "perf xxxx", but we obviously:
*
@@ -377,6 +451,7 @@
argc--;
handle_options(&argv, &argc, NULL);
commit_pager_choice();
+ set_debugfs_path();
if (argc > 0) {
if (!prefixcmp(argv[0], "--"))
argv[0] += 2;
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 63e67cc..e5148e2 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -1,7 +1,13 @@
#ifndef _PERF_PERF_H
#define _PERF_PERF_H
-#if defined(__x86_64__) || defined(__i386__)
+#if defined(__i386__)
+#include "../../arch/x86/include/asm/unistd.h"
+#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
+#define cpu_relax() asm volatile("rep; nop" ::: "memory");
+#endif
+
+#if defined(__x86_64__)
#include "../../arch/x86/include/asm/unistd.h"
#define rmb() asm volatile("lfence" ::: "memory")
#define cpu_relax() asm volatile("rep; nop" ::: "memory");
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 161d5f4..4b50c41 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -18,6 +18,7 @@
#define PERFATTRIBUTES_FILE ".perfattributes"
#define INFOATTRIBUTES_FILE "info/attributes"
#define ATTRIBUTE_MACRO_PREFIX "[attr]"
+#define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR"
typedef int (*config_fn_t)(const char *, const char *, void *);
extern int perf_default_config(const char *, const char *, void *);
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index b5ef53a..bf28044 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -16,7 +16,7 @@
int frozen;
int attrs, size;
struct perf_header_attr **attr;
- off_t attr_offset;
+ s64 attr_offset;
u64 data_offset;
u64 data_size;
};
diff --git a/tools/perf/util/include/linux/kernel.h b/tools/perf/util/include/linux/kernel.h
index 99c1b3d..a6b8739 100644
--- a/tools/perf/util/include/linux/kernel.h
+++ b/tools/perf/util/include/linux/kernel.h
@@ -18,4 +18,12 @@
(type *)((char *)__mptr - offsetof(type, member)); })
#endif
+#ifndef max
+#define max(x, y) ({ \
+ typeof(x) _max1 = (x); \
+ typeof(y) _max2 = (y); \
+ (void) (&_max1 == &_max2); \
+ _max1 > _max2 ? _max1 : _max2; })
+#endif
+
#endif
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 5184959..7bdad8d 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -5,6 +5,7 @@
#include "parse-events.h"
#include "exec_cmd.h"
#include "string.h"
+#include "cache.h"
extern char *strcasestr(const char *haystack, const char *needle);
@@ -19,6 +20,8 @@
char *alias;
};
+char debugfs_path[MAXPATHLEN];
+
#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
@@ -71,8 +74,8 @@
#define MAX_ALIASES 8
static char *hw_cache[][MAX_ALIASES] = {
- { "L1-d$", "l1-d", "l1d", "L1-data", },
- { "L1-i$", "l1-i", "l1i", "L1-instruction", },
+ { "L1-dcache", "l1-d", "l1d", "L1-data", },
+ { "L1-icache", "l1-i", "l1i", "L1-instruction", },
{ "LLC", "L2" },
{ "dTLB", "d-tlb", "Data-TLB", },
{ "iTLB", "i-tlb", "Instruction-TLB", },
@@ -110,6 +113,88 @@
[C(BPU)] = (CACHE_READ),
};
+#define for_each_subsystem(sys_dir, sys_dirent, sys_next, file, st) \
+ while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
+ if (snprintf(file, MAXPATHLEN, "%s/%s", debugfs_path, \
+ sys_dirent.d_name) && \
+ (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \
+ (strcmp(sys_dirent.d_name, ".")) && \
+ (strcmp(sys_dirent.d_name, "..")))
+
+#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, file, st) \
+ while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
+ if (snprintf(file, MAXPATHLEN, "%s/%s/%s", debugfs_path, \
+ sys_dirent.d_name, evt_dirent.d_name) && \
+ (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \
+ (strcmp(evt_dirent.d_name, ".")) && \
+ (strcmp(evt_dirent.d_name, "..")))
+
+#define MAX_EVENT_LENGTH 30
+
+int valid_debugfs_mount(const char *debugfs)
+{
+ struct statfs st_fs;
+
+ if (statfs(debugfs, &st_fs) < 0)
+ return -ENOENT;
+ else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
+ return -ENOENT;
+ return 0;
+}
+
+static char *tracepoint_id_to_name(u64 config)
+{
+ static char tracepoint_name[2 * MAX_EVENT_LENGTH];
+ DIR *sys_dir, *evt_dir;
+ struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
+ struct stat st;
+ char id_buf[4];
+ int fd;
+ u64 id;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return "unkown";
+
+ sys_dir = opendir(debugfs_path);
+ if (!sys_dir)
+ goto cleanup;
+
+ for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
+ evt_dir = opendir(evt_path);
+ if (!evt_dir)
+ goto cleanup;
+ for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
+ evt_path, st) {
+ snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id",
+ debugfs_path, sys_dirent.d_name,
+ evt_dirent.d_name);
+ fd = open(evt_path, O_RDONLY);
+ if (fd < 0)
+ continue;
+ if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+ close(fd);
+ continue;
+ }
+ close(fd);
+ id = atoll(id_buf);
+ if (id == config) {
+ closedir(evt_dir);
+ closedir(sys_dir);
+ snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH,
+ "%s:%s", sys_dirent.d_name,
+ evt_dirent.d_name);
+ return tracepoint_name;
+ }
+ }
+ closedir(evt_dir);
+ }
+
+cleanup:
+ closedir(sys_dir);
+ return "unkown";
+}
+
static int is_cache_op_valid(u8 cache_type, u8 cache_op)
{
if (hw_cache_stat[cache_type] & COP(cache_op))
@@ -177,6 +262,9 @@
return sw_event_names[config];
return "unknown-software";
+ case PERF_TYPE_TRACEPOINT:
+ return tracepoint_id_to_name(config);
+
default:
break;
}
@@ -265,6 +353,53 @@
return 1;
}
+static int parse_tracepoint_event(const char **strp,
+ struct perf_counter_attr *attr)
+{
+ const char *evt_name;
+ char sys_name[MAX_EVENT_LENGTH];
+ char id_buf[4];
+ int fd;
+ unsigned int sys_length, evt_length;
+ u64 id;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return 0;
+
+ evt_name = strchr(*strp, ':');
+ if (!evt_name)
+ return 0;
+
+ sys_length = evt_name - *strp;
+ if (sys_length >= MAX_EVENT_LENGTH)
+ return 0;
+
+ strncpy(sys_name, *strp, sys_length);
+ sys_name[sys_length] = '\0';
+ evt_name = evt_name + 1;
+ evt_length = strlen(evt_name);
+ if (evt_length >= MAX_EVENT_LENGTH)
+ return 0;
+
+ snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
+ sys_name, evt_name);
+ fd = open(evt_path, O_RDONLY);
+ if (fd < 0)
+ return 0;
+
+ if (read(fd, id_buf, sizeof(id_buf)) < 0) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+ id = atoll(id_buf);
+ attr->config = id;
+ attr->type = PERF_TYPE_TRACEPOINT;
+ *strp = evt_name + evt_length;
+ return 1;
+}
+
static int check_events(const char *str, unsigned int i)
{
int n;
@@ -374,7 +509,8 @@
*/
static int parse_event_symbols(const char **str, struct perf_counter_attr *attr)
{
- if (!(parse_raw_event(str, attr) ||
+ if (!(parse_tracepoint_event(str, attr) ||
+ parse_raw_event(str, attr) ||
parse_numeric_event(str, attr) ||
parse_symbolic_event(str, attr) ||
parse_generic_hw_event(str, attr)))
@@ -423,6 +559,42 @@
};
/*
+ * Print the events from <debugfs_mount_point>/tracing/events
+ */
+
+static void print_tracepoint_events(void)
+{
+ DIR *sys_dir, *evt_dir;
+ struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
+ struct stat st;
+ char evt_path[MAXPATHLEN];
+
+ if (valid_debugfs_mount(debugfs_path))
+ return;
+
+ sys_dir = opendir(debugfs_path);
+ if (!sys_dir)
+ goto cleanup;
+
+ for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
+ evt_dir = opendir(evt_path);
+ if (!evt_dir)
+ goto cleanup;
+ for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
+ evt_path, st) {
+ snprintf(evt_path, MAXPATHLEN, "%s:%s",
+ sys_dirent.d_name, evt_dirent.d_name);
+ fprintf(stderr, " %-40s [%s]\n", evt_path,
+ event_type_descriptors[PERF_TYPE_TRACEPOINT+1]);
+ }
+ closedir(evt_dir);
+ }
+
+cleanup:
+ closedir(sys_dir);
+}
+
+/*
* Print the help text for the event symbols:
*/
void print_events(void)
@@ -436,7 +608,7 @@
for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
type = syms->type + 1;
- if (type > ARRAY_SIZE(event_type_descriptors))
+ if (type >= ARRAY_SIZE(event_type_descriptors))
type = 0;
if (type != prev_type)
@@ -472,5 +644,7 @@
"rNNN");
fprintf(stderr, "\n");
+ print_tracepoint_events();
+
exit(129);
}
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index e3d5529..1ea5d09 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -3,6 +3,8 @@
* Parse symbolic events/counts passed in as options:
*/
+struct option;
+
extern int nr_counters;
extern struct perf_counter_attr attrs[MAX_COUNTERS];
@@ -15,3 +17,6 @@
extern void print_events(void);
+extern char debugfs_path[];
+extern int valid_debugfs_mount(const char *debugfs);
+
diff --git a/tools/perf/util/string.h b/tools/perf/util/string.h
index 3dca2f6..bf39dfa 100644
--- a/tools/perf/util/string.h
+++ b/tools/perf/util/string.h
@@ -5,4 +5,7 @@
int hex2u64(const char *ptr, u64 *val);
+#define _STR(x) #x
+#define STR(x) _STR(x)
+
#endif
diff --git a/tools/perf/util/strlist.c b/tools/perf/util/strlist.c
index 025a78e..7ad3817 100644
--- a/tools/perf/util/strlist.c
+++ b/tools/perf/util/strlist.c
@@ -64,6 +64,7 @@
rb_link_node(&sn->rb_node, parent, p);
rb_insert_color(&sn->rb_node, &self->entries);
+ ++self->nr_entries;
return 0;
}
@@ -155,8 +156,9 @@
struct strlist *self = malloc(sizeof(*self));
if (self != NULL) {
- self->entries = RB_ROOT;
- self->dupstr = dupstr;
+ self->entries = RB_ROOT;
+ self->dupstr = dupstr;
+ self->nr_entries = 0;
if (slist && strlist__parse_list(self, slist) != 0)
goto out_error;
}
@@ -182,3 +184,17 @@
free(self);
}
}
+
+struct str_node *strlist__entry(const struct strlist *self, unsigned int idx)
+{
+ struct rb_node *nd;
+
+ for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
+ struct str_node *pos = rb_entry(nd, struct str_node, rb_node);
+
+ if (!idx--)
+ return pos;
+ }
+
+ return NULL;
+}
diff --git a/tools/perf/util/strlist.h b/tools/perf/util/strlist.h
index 2fdcfee..921818e 100644
--- a/tools/perf/util/strlist.h
+++ b/tools/perf/util/strlist.h
@@ -11,7 +11,8 @@
struct strlist {
struct rb_root entries;
- bool dupstr;
+ unsigned int nr_entries;
+ bool dupstr;
};
struct strlist *strlist__new(bool dupstr, const char *slist);
@@ -21,11 +22,17 @@
int strlist__load(struct strlist *self, const char *filename);
int strlist__add(struct strlist *self, const char *str);
+struct str_node *strlist__entry(const struct strlist *self, unsigned int idx);
bool strlist__has_entry(struct strlist *self, const char *entry);
static inline bool strlist__empty(const struct strlist *self)
{
- return rb_first(&self->entries) == NULL;
+ return self->nr_entries == 0;
+}
+
+static inline unsigned int strlist__nr_entries(const struct strlist *self)
+{
+ return self->nr_entries;
}
int strlist__parse_list(struct strlist *self, const char *s);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 4683b67..2810605 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -6,9 +6,15 @@
#include <libelf.h>
#include <gelf.h>
#include <elf.h>
+#include <bfd.h>
const char *sym_hist_filter;
+#ifndef DMGL_PARAMS
+#define DMGL_PARAMS (1 << 0) /* Include function args */
+#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
+#endif
+
static struct symbol *symbol__new(u64 start, u64 len,
const char *name, unsigned int priv_size,
u64 obj_start, int verbose)
@@ -65,6 +71,7 @@
self->syms = RB_ROOT;
self->sym_priv_size = sym_priv_size;
self->find_symbol = dso__find_symbol;
+ self->slen_calculated = 0;
}
return self;
@@ -373,36 +380,61 @@
idx < nr_entries; \
++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
-static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
- GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym,
- GElf_Shdr *shdr_dynsym,
- size_t dynsym_idx, int verbose)
+/*
+ * We need to check if we have a .dynsym, so that we can handle the
+ * .plt, synthesizing its symbols, that aren't on the symtabs (be it
+ * .dynsym or .symtab).
+ * And always look at the original dso, not at debuginfo packages, that
+ * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
+ */
+static int dso__synthesize_plt_symbols(struct dso *self, int verbose)
{
uint32_t nr_rel_entries, idx;
GElf_Sym sym;
u64 plt_offset;
GElf_Shdr shdr_plt;
struct symbol *f;
- GElf_Shdr shdr_rel_plt;
+ GElf_Shdr shdr_rel_plt, shdr_dynsym;
Elf_Data *reldata, *syms, *symstrs;
- Elf_Scn *scn_plt_rel, *scn_symstrs;
+ Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
+ size_t dynsym_idx;
+ GElf_Ehdr ehdr;
char sympltname[1024];
- int nr = 0, symidx;
+ Elf *elf;
+ int nr = 0, symidx, fd, err = 0;
- scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
+ fd = open(self->name, O_RDONLY);
+ if (fd < 0)
+ goto out;
+
+ elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
+ if (elf == NULL)
+ goto out_close;
+
+ if (gelf_getehdr(elf, &ehdr) == NULL)
+ goto out_elf_end;
+
+ scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
+ ".dynsym", &dynsym_idx);
+ if (scn_dynsym == NULL)
+ goto out_elf_end;
+
+ scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
".rela.plt", NULL);
if (scn_plt_rel == NULL) {
- scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
+ scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
".rel.plt", NULL);
if (scn_plt_rel == NULL)
- return 0;
+ goto out_elf_end;
}
- if (shdr_rel_plt.sh_link != dynsym_idx)
- return 0;
+ err = -1;
- if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL)
- return 0;
+ if (shdr_rel_plt.sh_link != dynsym_idx)
+ goto out_elf_end;
+
+ if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
+ goto out_elf_end;
/*
* Fetch the relocation section to find the indexes to the GOT
@@ -410,19 +442,19 @@
*/
reldata = elf_getdata(scn_plt_rel, NULL);
if (reldata == NULL)
- return -1;
+ goto out_elf_end;
syms = elf_getdata(scn_dynsym, NULL);
if (syms == NULL)
- return -1;
+ goto out_elf_end;
- scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link);
+ scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
if (scn_symstrs == NULL)
- return -1;
+ goto out_elf_end;
symstrs = elf_getdata(scn_symstrs, NULL);
if (symstrs == NULL)
- return -1;
+ goto out_elf_end;
nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
plt_offset = shdr_plt.sh_offset;
@@ -441,7 +473,7 @@
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname, self->sym_priv_size, 0, verbose);
if (!f)
- return -1;
+ goto out_elf_end;
dso__insert_symbol(self, f);
++nr;
@@ -459,19 +491,25 @@
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname, self->sym_priv_size, 0, verbose);
if (!f)
- return -1;
+ goto out_elf_end;
dso__insert_symbol(self, f);
++nr;
}
- } else {
- /*
- * TODO: There are still one more shdr_rel_plt.sh_type
- * I have to investigate, but probably should be ignored.
- */
}
- return nr;
+ err = 0;
+out_elf_end:
+ elf_end(elf);
+out_close:
+ close(fd);
+
+ if (err == 0)
+ return nr;
+out:
+ fprintf(stderr, "%s: problems reading %s PLT info.\n",
+ __func__, self->name);
+ return 0;
}
static int dso__load_sym(struct dso *self, int fd, const char *name,
@@ -485,10 +523,9 @@
GElf_Shdr shdr;
Elf_Data *syms;
GElf_Sym sym;
- Elf_Scn *sec, *sec_dynsym, *sec_strndx;
+ Elf_Scn *sec, *sec_strndx;
Elf *elf;
- size_t dynsym_idx;
- int nr = 0;
+ int nr = 0, kernel = !strcmp("[kernel]", self->name);
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
if (elf == NULL) {
@@ -504,32 +541,11 @@
goto out_elf_end;
}
- /*
- * We need to check if we have a .dynsym, so that we can handle the
- * .plt, synthesizing its symbols, that aren't on the symtabs (be it
- * .dynsym or .symtab)
- */
- sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr,
- ".dynsym", &dynsym_idx);
- if (sec_dynsym != NULL) {
- nr = dso__synthesize_plt_symbols(self, elf, &ehdr,
- sec_dynsym, &shdr,
- dynsym_idx, verbose);
- if (nr < 0)
- goto out_elf_end;
- }
-
- /*
- * But if we have a full .symtab (that is a superset of .dynsym) we
- * should add the symbols not in the .dynsyn
- */
sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
if (sec == NULL) {
- if (sec_dynsym == NULL)
+ sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
+ if (sec == NULL)
goto out_elf_end;
-
- sec = sec_dynsym;
- gelf_getshdr(sec, &shdr);
}
syms = elf_getdata(sec, NULL);
@@ -555,12 +571,17 @@
nr_syms = shdr.sh_size / shdr.sh_entsize;
memset(&sym, 0, sizeof(sym));
- self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
+ if (!kernel) {
+ self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
elf_section_by_name(elf, &ehdr, &shdr,
".gnu.prelink_undo",
NULL) != NULL);
+ } else self->adjust_symbols = 0;
+
elf_symtab__for_each_symbol(syms, nr_syms, index, sym) {
struct symbol *f;
+ const char *name;
+ char *demangled;
u64 obj_start;
struct section *section = NULL;
int is_label = elf_sym__is_label(&sym);
@@ -599,10 +620,19 @@
goto out_elf_end;
}
}
+ /*
+ * We need to figure out if the object was created from C++ sources
+ * DWARF DW_compile_unit has this, but we don't always have access
+ * to it...
+ */
+ name = elf_sym__name(&sym, symstrs);
+ demangled = bfd_demangle(NULL, name, DMGL_PARAMS | DMGL_ANSI);
+ if (demangled != NULL)
+ name = demangled;
- f = symbol__new(sym.st_value, sym.st_size,
- elf_sym__name(&sym, symstrs),
+ f = symbol__new(sym.st_value, sym.st_size, name,
self->sym_priv_size, obj_start, verbose);
+ free(demangled);
if (!f)
goto out_elf_end;
@@ -668,6 +698,11 @@
if (!ret)
goto more;
+ if (ret > 0) {
+ int nr_plt = dso__synthesize_plt_symbols(self, verbose);
+ if (nr_plt > 0)
+ ret += nr_plt;
+ }
out:
free(name);
return ret;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 7918cff..2f92b21 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -25,6 +25,7 @@
struct symbol *(*find_symbol)(struct dso *, u64 ip);
unsigned int sym_priv_size;
unsigned char adjust_symbols;
+ unsigned char slen_calculated;
char name[0];
};
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index b4be607..68fe157 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -50,6 +50,7 @@
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
+#include <sys/statfs.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
@@ -80,6 +81,7 @@
#include <netdb.h>
#include <pwd.h>
#include <inttypes.h>
+#include "../../../include/linux/magic.h"
#ifndef NO_ICONV
#include <iconv.h>