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Merge branch 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf

Browse Source 
* '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
  ...
This commit is contained in:
Linus Torvalds 2009-07-22 11:41:56 -07:00
commit 3c3301083e
25 changed files with 949 additions and 300 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

253
arch/x86/kernel/cpu/perf_counter.c
View File

@ -65,6 +65,52 @@ static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters) = {
.enabled = 1,
};
/*
* 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.
*/
@ -666,6 +712,7 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
{
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 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
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 @@ void hw_perf_disable(void)
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 @@ static void amd_pmu_enable_all(void)
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 intel_pmu_ack_status(u64 ack)
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 @@ intel_pmu_disable_fixed(struct hw_perf_counter *hwc, int __idx)
{
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 @@ intel_pmu_enable_fixed(struct hw_perf_counter *hwc, int __idx)
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 @@ static void amd_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
if (cpuc->enabled)
x86_pmu_enable_counter(hwc, idx);
else
x86_pmu_disable_counter(hwc, idx);
}
static int
@ -1176,6 +1285,49 @@ static void intel_pmu_reset(void)
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 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
{
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 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
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 @@ static __read_mostly struct notifier_block perf_counter_nmi_notifier = {
.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 @@ static struct x86_pmu amd_pmu = {
.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 @@ static int intel_pmu_init(void)
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

15
include/linux/perf_counter.h
View File

@ -120,8 +120,9 @@ enum perf_counter_sample_format {
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 @@ enum perf_event_type {
* 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 @@ enum perf_event_type {
* { 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
*

2
init/Kconfig
View File

@ -962,7 +962,7 @@ config PERF_COUNTERS
config EVENT_PROFILE
bool "Tracepoint profile sources"
depends on PERF_COUNTERS && EVENT_TRACER
depends on PERF_COUNTERS && EVENT_TRACING
default y
endmenu

9
kernel/fork.c
View File

@ -1407,14 +1407,11 @@ long do_fork(unsigned long clone_flags,
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);

185
kernel/perf_counter.c
View File

@ -146,6 +146,28 @@ static void put_ctx(struct perf_counter_context *ctx)
}
}
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 @@ static void perf_counter_cpu_sched_in(struct perf_cpu_context *cpuctx, int cpu)
#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 @@ static void perf_adjust_period(struct perf_counter *counter, u64 events)
if (!sample_period)
sample_period = 1;
perf_log_period(counter, sample_period);
hwc->sample_period = sample_period;
}
@ -1463,10 +1482,8 @@ static void perf_counter_enable_on_exec(struct task_struct *task)
/*
* 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 @@ __perf_counter_init_context(struct perf_counter_context *ctx,
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 @@ static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
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 @@ perf_read_hw(struct perf_counter *counter, char __user *buf, size_t count)
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 @@ static int perf_counter_period(struct perf_counter *counter, u64 __user *arg)
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 @@ static void perf_counter_output(struct perf_counter *counter, int nmi,
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 @@ static void perf_counter_output(struct perf_counter *counter, int nmi,
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 @@ static void perf_counter_output(struct perf_counter *counter, int nmi,
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 @@ perf_counter_read_event(struct perf_counter *counter,
}
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 @@ void perf_counter_fork(struct task_struct *task)
.event = {
.header = {
.type = PERF_EVENT_FORK,
.misc = 0,
.size = sizeof(fork_event.event),
},
/* .pid */
/* .ppid */
},
};
@ -2969,8 +2984,10 @@ static void perf_counter_comm_event(struct perf_comm_event *comm_event)
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 @@ void perf_counter_comm(struct task_struct *task)
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 @@ static void perf_counter_mmap_event(struct perf_mmap_event *mmap_event)
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 @@ static void perf_counter_mmap_event(struct perf_mmap_event *mmap_event)
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 @@ void __perf_counter_mmap(struct vm_area_struct *vma)
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,
@ -3159,49 +3201,6 @@ void __perf_counter_mmap(struct vm_area_struct *vma)
perf_counter_mmap_event(&mmap_event);
}
/*
* 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 @@ static void perf_log_throttle(struct perf_counter *counter, int enable)
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 @@ static const struct pmu perf_ops_task_clock = {
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 @@ extern void ftrace_profile_disable(int);
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 @@ void perf_counter_exit_task(struct task_struct *child)
*/
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);

15
tools/perf/Documentation/perf-report.txt
View File

@ -24,6 +24,9 @@ OPTIONS
--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 @@ OPTIONS
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]

2
tools/perf/Makefile
View File

@ -345,7 +345,7 @@ BUILTIN_OBJS += builtin-stat.o
BUILTIN_OBJS += builtin-top.o
PERFLIBS = $(LIB_FILE)
EXTLIBS =
EXTLIBS = -lbfd
#
# Platform specific tweaks

24
tools/perf/builtin-annotate.c
View File

@ -74,20 +74,12 @@ struct fork_event {
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;
@ -997,19 +989,6 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head)
return 0;
}
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)
{
@ -1025,9 +1004,6 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
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:
*/

13
tools/perf/builtin-record.c
View File

@ -43,6 +43,7 @@ static int call_graph = 0;
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 @@ static void pid_synthesize_mmap_samples(pid_t pid)
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 @@ static void create_counter(int counter, int cpu, pid_t pid)
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 @@ static const struct option options[] = {
"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 cmd_record(int argc, const char **argv, const char *prefix __used)
{
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);

255
tools/perf/builtin-report.c
View File

@ -33,8 +33,10 @@ static char *vmlinux = NULL;
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 verbose;
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 @@ struct fork_event {
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 @@ typedef union event_union {
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 @@ static struct thread *thread__new(pid_t pid)
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 @@ struct sort_entry {
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 @@ sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
}
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 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
}
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 @@ sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
}
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 @@ sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
}
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 @@ sort__parent_cmp(struct hist_entry *left, struct hist_entry *right)
}
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 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
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 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
*
*/
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 @@ resolve_symbol(struct thread *thread, struct map **mapp,
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 @@ static size_t output__fprintf(FILE *fp, u64 total_samples)
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);
@ -1523,19 +1627,6 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head)
return 0;
}
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)
{
@ -1617,9 +1708,6 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
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 @@ static const struct option options[] = {
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 @@ static const struct option options[] = {
"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_sorting(void)
}
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 @@ static void setup_list(struct strlist **list, const char *list_str,
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 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
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 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
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();
}

3
tools/perf/builtin-stat.c
View File

@ -511,7 +511,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
{
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)

6
tools/perf/builtin-top.c
View File

@ -58,6 +58,7 @@ static u64 count_filter = 5;
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 @@ int group_fd;
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 @@ static void start_counter(int i, int counter)
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 @@ static const struct option options[] = {
"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,

77
tools/perf/perf.c
View File

@ -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 @@ struct pager_config {
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 commit_pager_choice(void) {
}
}
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 @@ static int handle_options(const char*** argv, int* argc, int* envchanged)
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 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
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 @@ static int run_argv(int *argcp, const char ***argv)
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 @@ int main(int argc, const char **argv)
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 @@ int main(int argc, const char **argv)
argc--;
handle_options(&argv, &argc, NULL);
commit_pager_choice();
set_debugfs_path();
if (argc > 0) {
if (!prefixcmp(argv[0], "--"))
argv[0] += 2;

8
tools/perf/perf.h
View File

@ -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");

1
tools/perf/util/cache.h
View File

@ -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 *);

2
tools/perf/util/header.h
View File

@ -16,7 +16,7 @@ struct perf_header {
int frozen;
int attrs, size;
struct perf_header_attr **attr;
off_t attr_offset;
s64 attr_offset;
u64 data_offset;
u64 data_size;
};

8
tools/perf/util/include/linux/kernel.h
View File

@ -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

182
tools/perf/util/parse-events.c
View File

@ -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 @@ struct event_symbol {
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 @@ static char *sw_event_names[] = {
#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 @@ static unsigned long hw_cache_stat[C(MAX)] = {
[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 @@ char *event_name(int counter)
return sw_event_names[config];
return "unknown-software";
case PERF_TYPE_TRACEPOINT:
return tracepoint_id_to_name(config);
default:
break;
}
@ -265,6 +353,53 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
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 @@ parse_event_modifier(const char **strp, struct perf_counter_attr *attr)
*/
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)))
@ -422,6 +558,42 @@ static const char * const event_type_descriptors[] = {
"Hardware cache event",
};
/*
* 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:
*/
@ -436,7 +608,7 @@ void print_events(void)
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 @@ void print_events(void)
"rNNN");
fprintf(stderr, "\n");
print_tracepoint_events();
exit(129);
}

5
tools/perf/util/parse-events.h
View File

@ -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 int parse_events(const struct option *opt, const char *str, int unset);
extern void print_events(void);
extern char debugfs_path[];
extern int valid_debugfs_mount(const char *debugfs);

3
tools/perf/util/string.h
View File

@ -5,4 +5,7 @@
int hex2u64(const char *ptr, u64 *val);
#define _STR(x) #x
#define STR(x) _STR(x)
#endif

20
tools/perf/util/strlist.c
View File

@ -64,6 +64,7 @@ int strlist__add(struct strlist *self, const char *new_entry)
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 *strlist__new(bool dupstr, const char *slist)
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 @@ void strlist__delete(struct strlist *self)
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;
}

11
tools/perf/util/strlist.h
View File

@ -11,7 +11,8 @@ struct str_node {
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 @@ void strlist__remove(struct strlist *self, struct str_node *sn);
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);

147
tools/perf/util/symbol.c
View File

@ -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 @@ struct dso *dso__new(const char *name, unsigned int sym_priv_size)
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 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
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 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
*/
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 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
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 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
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 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
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 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
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 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
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 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
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 @@ more:
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;

1
tools/perf/util/symbol.h
View File

@ -25,6 +25,7 @@ struct dso {
struct symbol *(*find_symbol)(struct dso *, u64 ip);
unsigned int sym_priv_size;
unsigned char adjust_symbols;
unsigned char slen_calculated;
char name[0];
};

2
tools/perf/util/util.h
View File

@ -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>