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cpu_profiler.cc
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1129 lines (887 loc) · 34.2 KB
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#include <assert.h>
#include <math.h>
#include <node_api.h>
#include <string.h>
#include <uv.h>
#include <v8-profiler.h>
#include <v8.h>
#include <functional>
#include <string>
#include <unordered_map>
#define FORMAT_SAMPLED 2
#define FORMAT_RAW 1
#ifndef PROFILER_FORMAT
#define PROFILER_FORMAT FORMAT_SAMPLED
#endif
#ifndef FORMAT_BENCHMARK
#define FORMAT_BENCHMARK 0
#endif
static const uint8_t kMaxStackDepth(128);
static const float kSamplingFrequency(99.0); // 99 to avoid lockstep sampling
static const float kSamplingHz(1 / kSamplingFrequency);
static const int kSamplingInterval(kSamplingHz * 1e6);
static const v8::CpuProfilingNamingMode kNamingMode(
v8::CpuProfilingNamingMode::kDebugNaming);
static const v8::CpuProfilingLoggingMode kDefaultLoggingMode(
v8::CpuProfilingLoggingMode::kEagerLogging);
// Allow users to override the default logging mode via env variable. This is
// useful because sometimes the flow of the profiled program can be to execute
// many sequential transaction - in that case, it may be preferable to set eager
// logging to avoid paying the high cost of profiling for each individual
// transaction (one example for this are jest tests when run with --runInBand
// option).
static const char *kEagerLoggingMode = "eager";
static const char *kLazyLoggingMode = "lazy";
v8::CpuProfilingLoggingMode GetLoggingMode() {
static const char *logging_mode(getenv("SENTRY_PROFILER_LOGGING_MODE"));
// most times this wont be set so just bail early
if (!logging_mode) {
return kDefaultLoggingMode;
}
// other times it'll likely be set to lazy as eager is the default
if (strcmp(logging_mode, kLazyLoggingMode) == 0) {
return v8::CpuProfilingLoggingMode::kLazyLogging;
} else if (strcmp(logging_mode, kEagerLoggingMode) == 0) {
return v8::CpuProfilingLoggingMode::kEagerLogging;
}
return kDefaultLoggingMode;
}
class SentryProfile;
class Profiler;
enum class ProfileStatus {
kNotStarted,
kStarted,
kStopped,
};
class MeasurementsTicker {
private:
uv_timer_t timer;
uint64_t period_ms;
std::unordered_map<std::string,
const std::function<bool(uint64_t, v8::HeapStatistics &)>>
heap_listeners;
std::unordered_map<std::string, const std::function<bool(uint64_t, double)>>
cpu_listeners;
v8::Isolate *isolate;
v8::HeapStatistics heap_stats;
uv_cpu_info_t cpu_stats;
public:
MeasurementsTicker(uv_loop_t *loop)
: period_ms(100), isolate(v8::Isolate::GetCurrent()) {
uv_timer_init(loop, &timer);
timer.data = this;
}
static void ticker(uv_timer_t *);
// Memory listeners
void heap_callback();
void add_heap_listener(
std::string &profile_id,
const std::function<bool(uint64_t, v8::HeapStatistics &)> cb);
void remove_heap_listener(
std::string &profile_id,
const std::function<bool(uint64_t, v8::HeapStatistics &)> &cb);
// CPU listeners
void cpu_callback();
void add_cpu_listener(std::string &profile_id,
const std::function<bool(uint64_t, double)> cb);
void remove_cpu_listener(std::string &profile_id,
const std::function<bool(uint64_t, double)> &cb);
size_t listener_count();
~MeasurementsTicker() {
uv_timer_stop(&timer);
auto handle = reinterpret_cast<uv_handle_t *>(&timer);
// Calling uv_close on an inactive handle will cause a segfault.
if (uv_is_active(handle)) {
uv_close(handle, nullptr);
}
}
};
size_t MeasurementsTicker::listener_count() {
return heap_listeners.size() + cpu_listeners.size();
}
// Heap tickers
void MeasurementsTicker::heap_callback() {
isolate->GetHeapStatistics(&heap_stats);
uint64_t ts = uv_hrtime();
for (auto cb : heap_listeners) {
cb.second(ts, heap_stats);
}
}
void MeasurementsTicker::add_heap_listener(
std::string &profile_id,
const std::function<bool(uint64_t, v8::HeapStatistics &)> cb) {
heap_listeners.emplace(profile_id, cb);
if (listener_count() == 1) {
uv_timer_set_repeat(&timer, period_ms);
uv_timer_start(&timer, ticker, 0, period_ms);
}
}
void MeasurementsTicker::remove_heap_listener(
std::string &profile_id,
const std::function<bool(uint64_t, v8::HeapStatistics &)> &cb) {
heap_listeners.erase(profile_id);
if (listener_count() == 0) {
uv_timer_stop(&timer);
}
};
// CPU tickers
void MeasurementsTicker::cpu_callback() {
uv_cpu_info_t *cpu = &cpu_stats;
int count;
int err = uv_cpu_info(&cpu, &count);
if (err) {
return;
}
if (count < 1) {
return;
}
uint64_t ts = uv_hrtime();
uint64_t total = 0;
uint64_t idle_total = 0;
for (int i = 0; i < count; i++) {
uv_cpu_info_t *core = cpu + i;
total += core->cpu_times.user;
total += core->cpu_times.nice;
total += core->cpu_times.sys;
total += core->cpu_times.idle;
total += core->cpu_times.irq;
idle_total += core->cpu_times.idle;
}
double idle_avg = idle_total / count;
double total_avg = total / count;
double rate = 1.0 - idle_avg / total_avg;
if (rate < 0.0 || isinf(rate) || isnan(rate)) {
rate = 0.0;
}
auto it = cpu_listeners.begin();
while (it != cpu_listeners.end()) {
if (it->second(ts, rate)) {
it = cpu_listeners.erase(it);
} else {
++it;
}
};
uv_free_cpu_info(cpu, count);
};
void MeasurementsTicker::ticker(uv_timer_t *handle) {
MeasurementsTicker *self = static_cast<MeasurementsTicker *>(handle->data);
self->heap_callback();
self->cpu_callback();
}
void MeasurementsTicker::add_cpu_listener(
std::string &profile_id, const std::function<bool(uint64_t, double)> cb) {
cpu_listeners.emplace(profile_id, cb);
if (listener_count() == 1) {
uv_timer_set_repeat(&timer, period_ms);
uv_timer_start(&timer, ticker, 0, period_ms);
}
}
void MeasurementsTicker::remove_cpu_listener(
std::string &profile_id, const std::function<bool(uint64_t, double)> &cb) {
cpu_listeners.erase(profile_id);
if (listener_count() == 0) {
uv_timer_stop(&timer);
}
};
class Profiler {
public:
std::unordered_map<std::string, SentryProfile *> active_profiles;
MeasurementsTicker measurements_ticker;
v8::CpuProfiler *cpu_profiler;
explicit Profiler(const napi_env &env, v8::Isolate *isolate)
: measurements_ticker(uv_default_loop()),
cpu_profiler(
v8::CpuProfiler::New(isolate, kNamingMode, GetLoggingMode())) {}
};
class SentryProfile {
private:
uint64_t started_at;
uint16_t heap_write_index = 0;
uint16_t cpu_write_index = 0;
std::vector<uint64_t> heap_stats_ts;
std::vector<uint64_t> heap_stats_usage;
std::vector<uint64_t> cpu_stats_ts;
std::vector<double> cpu_stats_usage;
const std::function<bool(uint64_t, v8::HeapStatistics &)> memory_sampler_cb;
const std::function<bool(uint64_t, double)> cpu_sampler_cb;
ProfileStatus status = ProfileStatus::kNotStarted;
std::string id;
public:
explicit SentryProfile(const char *id)
: started_at(uv_hrtime()),
memory_sampler_cb([this](uint64_t ts, v8::HeapStatistics &stats) {
if ((heap_write_index >= heap_stats_ts.capacity()) ||
heap_write_index >= heap_stats_usage.capacity()) {
return true;
}
heap_stats_ts.insert(heap_stats_ts.begin() + heap_write_index,
ts - started_at);
heap_stats_usage.insert(
heap_stats_usage.begin() + heap_write_index,
static_cast<uint64_t>(stats.used_heap_size()));
++heap_write_index;
return false;
}),
cpu_sampler_cb([this](uint64_t ts, double rate) {
if (cpu_write_index >= cpu_stats_ts.capacity() ||
cpu_write_index >= cpu_stats_usage.capacity()) {
return true;
}
cpu_stats_ts.insert(cpu_stats_ts.begin() + cpu_write_index,
ts - started_at);
cpu_stats_usage.insert(cpu_stats_usage.begin() + cpu_write_index,
rate);
++cpu_write_index;
return false;
}),
status(ProfileStatus::kNotStarted),
id(id) {
heap_stats_ts.reserve(300);
heap_stats_usage.reserve(300);
cpu_stats_ts.reserve(300);
cpu_stats_usage.reserve(300);
}
const std::vector<uint64_t> &heap_usage_timestamps() const;
const std::vector<uint64_t> &heap_usage_values() const;
const uint16_t &heap_usage_write_index() const;
const std::vector<uint64_t> &cpu_usage_timestamps() const;
const std::vector<double> &cpu_usage_values() const;
const uint16_t &cpu_usage_write_index() const;
void Start(Profiler *profiler);
v8::CpuProfile *Stop(Profiler *profiler);
};
void SentryProfile::Start(Profiler *profiler) {
v8::Local<v8::String> profile_title =
v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), id.c_str(),
v8::NewStringType::kNormal)
.ToLocalChecked();
started_at = uv_hrtime();
// Initialize the CPU Profiler
profiler->cpu_profiler->StartProfiling(
profile_title,
{v8::CpuProfilingMode::kCallerLineNumbers,
v8::CpuProfilingOptions::kNoSampleLimit, kSamplingInterval});
// listen for memory sample ticks
profiler->measurements_ticker.add_cpu_listener(id, cpu_sampler_cb);
profiler->measurements_ticker.add_heap_listener(id, memory_sampler_cb);
status = ProfileStatus::kStarted;
}
static void CleanupSentryProfile(Profiler *profiler,
SentryProfile *sentry_profile,
const std::string &profile_id) {
if (sentry_profile == nullptr) {
return;
}
sentry_profile->Stop(profiler);
profiler->active_profiles.erase(profile_id);
delete sentry_profile;
};
v8::CpuProfile *SentryProfile::Stop(Profiler *profiler) {
// Stop the CPU Profiler
v8::CpuProfile *profile = profiler->cpu_profiler->StopProfiling(
v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), id.c_str(),
v8::NewStringType::kNormal)
.ToLocalChecked());
// Remove the meemory sampler
profiler->measurements_ticker.remove_heap_listener(id, memory_sampler_cb);
profiler->measurements_ticker.remove_cpu_listener(id, cpu_sampler_cb);
// If for some reason stopProfiling was called with an invalid profile title
// or if that title had somehow been stopped already, profile will be null.
status = ProfileStatus::kStopped;
return profile;
}
// Memory getters
const std::vector<uint64_t> &SentryProfile::heap_usage_timestamps() const {
return heap_stats_ts;
};
const std::vector<uint64_t> &SentryProfile::heap_usage_values() const {
return heap_stats_usage;
};
const uint16_t &SentryProfile::heap_usage_write_index() const {
return heap_write_index;
};
// CPU getters
const std::vector<uint64_t> &SentryProfile::cpu_usage_timestamps() const {
return cpu_stats_ts;
};
const std::vector<double> &SentryProfile::cpu_usage_values() const {
return cpu_stats_usage;
};
const uint16_t &SentryProfile::cpu_usage_write_index() const {
return cpu_write_index;
};
#ifdef _WIN32
static const char kPlatformSeparator = '\\';
static const char kWinDiskPrefix = ':';
#else
static const char kPlatformSeparator = '/';
#endif
static const char kSentryPathDelimiter = '.';
static const char kSentryFileDelimiter = ':';
static const std::string kNodeModulesPath =
std::string("node_modules") + kPlatformSeparator;
static void GetFrameModule(const std::string &abs_path, std::string &module) {
if (abs_path.empty()) {
return;
}
module = abs_path;
// Drop .js extension
size_t module_len = module.length();
if (module.compare(module_len - 3, 3, ".js") == 0) {
module = module.substr(0, module_len - 3);
}
// Drop anything before and including node_modules/
size_t node_modules_pos = module.rfind(kNodeModulesPath);
if (node_modules_pos != std::string::npos) {
module = module.substr(node_modules_pos + 13);
}
// Replace all path separators with dots except the last one, that one is
// replaced with a colon
int match_count = 0;
for (int pos = module.length() - 1; pos >= 0; pos--) {
// if there is a match and it's not the first character, replace it
if (module[pos] == kPlatformSeparator) {
module[pos] =
match_count == 0 ? kSentryFileDelimiter : kSentryPathDelimiter;
match_count++;
}
}
#ifdef _WIN32
// Strip out C: prefix. On Windows, the drive letter is not part of the module
// name
if (module[1] == kWinDiskPrefix) {
// We will try and strip our the disk prefix.
module = module.substr(2, std::string::npos);
}
#endif
if (module[0] == '.') {
module = module.substr(1, std::string::npos);
}
}
static napi_value GetFrameModuleWrapped(napi_env env, napi_callback_info info) {
size_t argc = 2;
napi_value argv[2];
napi_get_cb_info(env, info, &argc, argv, nullptr, nullptr);
size_t len;
assert(napi_get_value_string_utf8(env, argv[0], NULL, 0, &len) == napi_ok);
char *abs_path = (char *)malloc(len + 1);
assert(napi_get_value_string_utf8(env, argv[0], abs_path, len + 1, &len) ==
napi_ok);
std::string module;
napi_value napi_module;
GetFrameModule(abs_path, module);
assert(napi_create_string_utf8(env, module.c_str(), NAPI_AUTO_LENGTH,
&napi_module) == napi_ok);
return napi_module;
}
napi_value CreateFrameNode(
const napi_env &env, const v8::CpuProfileNode &node,
std::unordered_map<std::string, std::string> &module_cache,
napi_value &resources) {
napi_value js_node;
napi_create_object(env, &js_node);
napi_value lineno_prop;
napi_create_int32(env, node.GetLineNumber(), &lineno_prop);
napi_set_named_property(env, js_node, "lineno", lineno_prop);
napi_value colno_prop;
napi_create_int32(env, node.GetColumnNumber(), &colno_prop);
napi_set_named_property(env, js_node, "colno", colno_prop);
if (node.GetSourceType() != v8::CpuProfileNode::SourceType::kScript) {
napi_value system_frame_prop;
napi_get_boolean(env, false, &system_frame_prop);
napi_set_named_property(env, js_node, "in_app", system_frame_prop);
}
napi_value function;
napi_create_string_utf8(env, node.GetFunctionNameStr(), NAPI_AUTO_LENGTH,
&function);
napi_set_named_property(env, js_node, "function", function);
const char *resource = node.GetScriptResourceNameStr();
if (resource != nullptr) {
// resource is absolute path, set it on the abs_path property
napi_value abs_path_prop;
napi_create_string_utf8(env, resource, NAPI_AUTO_LENGTH, &abs_path_prop);
napi_set_named_property(env, js_node, "abs_path", abs_path_prop);
// Error stack traces are not relative to root dir, doing our own path
// normalization breaks people's code mapping configs so we need to leave it
// as is.
napi_set_named_property(env, js_node, "filename", abs_path_prop);
std::string module;
std::string resource_str = std::string(resource);
if (resource_str.empty()) {
return js_node;
}
if (module_cache.find(resource_str) != module_cache.end()) {
module = module_cache[resource_str];
} else {
napi_value resource;
napi_create_string_utf8(env, resource_str.c_str(), NAPI_AUTO_LENGTH,
&resource);
napi_set_element(env, resources, module_cache.size(), resource);
GetFrameModule(resource_str, module);
module_cache.emplace(resource_str, module);
}
if (!module.empty()) {
napi_value filename_prop;
napi_create_string_utf8(env, module.c_str(), NAPI_AUTO_LENGTH,
&filename_prop);
napi_set_named_property(env, js_node, "module", filename_prop);
}
}
return js_node;
};
napi_value CreateSample(const napi_env &env, const uint32_t stack_id,
const int64_t sample_timestamp_us,
const uint32_t thread_id) {
napi_value js_node;
napi_create_object(env, &js_node);
napi_value stack_id_prop;
napi_create_uint32(env, stack_id, &stack_id_prop);
napi_set_named_property(env, js_node, "stack_id", stack_id_prop);
napi_value thread_id_prop;
napi_create_string_utf8(env, std::to_string(thread_id).c_str(),
NAPI_AUTO_LENGTH, &thread_id_prop);
napi_set_named_property(env, js_node, "thread_id", thread_id_prop);
napi_value elapsed_since_start_ns_prop;
napi_create_int64(env, sample_timestamp_us * 1000,
&elapsed_since_start_ns_prop);
napi_set_named_property(env, js_node, "elapsed_since_start_ns",
elapsed_since_start_ns_prop);
return js_node;
};
std::string kDelimiter = std::string(";");
std::string hashCpuProfilerNodeByPath(const v8::CpuProfileNode *node,
std::string &path) {
path.clear();
while (node != nullptr) {
path.append(std::to_string(node->GetNodeId()));
node = node->GetParent();
}
return path;
}
static void GetSamples(const napi_env &env, const v8::CpuProfile *profile,
const uint32_t thread_id, napi_value &samples,
napi_value &stacks, napi_value &frames,
napi_value &resources) {
const int64_t profile_start_time_us = profile->GetStartTime();
const int sampleCount = profile->GetSamplesCount();
uint32_t unique_stack_id = 0;
uint32_t unique_frame_id = 0;
// Initialize the lookup tables for stacks and frames, both of these are
// indexed in the sample format we are using to optimize for size.
std::unordered_map<uint32_t, uint32_t> frame_lookup_table;
std::unordered_map<std::string, uint32_t> stack_lookup_table;
std::unordered_map<std::string, std::string> module_cache;
// At worst, all stacks are unique so reserve the maximum amount of space
stack_lookup_table.reserve(sampleCount);
std::string node_hash = "";
for (int i = 0; i < sampleCount; i++) {
uint32_t stack_index = unique_stack_id;
const v8::CpuProfileNode *node = profile->GetSample(i);
const int64_t sample_timestamp = profile->GetSampleTimestamp(i);
// If a node was only on top of the stack once, then it will only ever
// be inserted once and there is no need for hashing.
if (node->GetHitCount() > 1) {
hashCpuProfilerNodeByPath(node, node_hash);
std::unordered_map<std::string, uint32_t>::iterator
stack_index_cache_hit = stack_lookup_table.find(node_hash);
// If we have a hit, update the stack index, otherwise
// insert it into the hash table and continue.
if (stack_index_cache_hit == stack_lookup_table.end()) {
stack_lookup_table.emplace(node_hash, stack_index);
} else {
stack_index = stack_index_cache_hit->second;
}
}
napi_value sample = CreateSample(
env, stack_index, sample_timestamp - profile_start_time_us, thread_id);
if (stack_index != unique_stack_id) {
napi_value index;
napi_create_uint32(env, i, &index);
napi_set_property(env, samples, index, sample);
continue;
}
// A stack is a list of frames ordered from outermost (top) to innermost
// frame (bottom)
napi_value stack;
napi_create_array(env, &stack);
uint32_t stack_depth = 0;
while (node != nullptr && stack_depth < kMaxStackDepth) {
auto nodeId = node->GetNodeId();
auto frame_index = frame_lookup_table.find(nodeId);
// If the frame does not exist in the index
if (frame_index == frame_lookup_table.end()) {
frame_lookup_table.emplace(nodeId, unique_frame_id);
napi_value frame_id;
napi_create_uint32(env, unique_frame_id, &frame_id);
napi_value depth;
napi_create_uint32(env, stack_depth, &depth);
napi_set_property(env, stack, depth, frame_id);
napi_set_property(env, frames, frame_id,
CreateFrameNode(env, *node, module_cache, resources));
unique_frame_id++;
} else {
// If it was already indexed, just add it's id to the stack
napi_value depth;
napi_create_uint32(env, stack_depth, &depth);
napi_value frame;
napi_create_uint32(env, frame_index->second, &frame);
napi_set_property(env, stack, depth, frame);
};
// Continue walking down the stack
node = node->GetParent();
stack_depth++;
}
napi_value napi_sample_index;
napi_value napi_stack_index;
napi_create_uint32(env, i, &napi_sample_index);
napi_set_property(env, samples, napi_sample_index, sample);
napi_create_uint32(env, stack_index, &napi_stack_index);
napi_set_property(env, stacks, napi_stack_index, stack);
unique_stack_id++;
}
}
static napi_value TranslateMeasurementsDouble(
const napi_env &env, const char *unit, const uint16_t size,
const std::vector<double> &values,
const std::vector<uint64_t> ×tamps) {
if (size > values.size() || size > timestamps.size()) {
napi_throw_range_error(env, "NAPI_ERROR",
"CPU measurement size is larger than the number of "
"values or timestamps");
return nullptr;
}
if (values.size() != timestamps.size()) {
napi_throw_range_error(env, "NAPI_ERROR",
"CPU measurement entries are corrupt, expected "
"values and timestamps to be of equal length");
return nullptr;
}
napi_value measurement;
napi_create_object(env, &measurement);
napi_value unit_string;
napi_create_string_utf8(env, unit, NAPI_AUTO_LENGTH, &unit_string);
napi_set_named_property(env, measurement, "unit", unit_string);
napi_value values_array;
napi_create_array(env, &values_array);
uint16_t idx = size;
for (size_t i = 0; i < idx; i++) {
napi_value entry;
napi_create_object(env, &entry);
napi_value value;
if (napi_create_double(env, values[i], &value) != napi_ok) {
if (napi_create_double(env, 0.0, &value) != napi_ok) {
continue;
}
}
napi_value ts;
napi_create_int64(env, timestamps[i], &ts);
napi_set_named_property(env, entry, "value", value);
napi_set_named_property(env, entry, "elapsed_since_start_ns", ts);
napi_set_element(env, values_array, i, entry);
}
napi_set_named_property(env, measurement, "values", values_array);
return measurement;
}
static napi_value TranslateMeasurements(
const napi_env &env, const char *unit, const uint16_t size,
const std::vector<uint64_t> &values,
const std::vector<uint64_t> ×tamps) {
if (size > values.size() || size > timestamps.size()) {
napi_throw_range_error(env, "NAPI_ERROR",
"Memory measurement size is larger than the number "
"of values or timestamps");
return nullptr;
}
if (values.size() != timestamps.size()) {
napi_throw_range_error(env, "NAPI_ERROR",
"Memory measurement entries are corrupt, expected "
"values and timestamps to be of equal length");
return nullptr;
}
napi_value measurement;
napi_create_object(env, &measurement);
napi_value unit_string;
napi_create_string_utf8(env, unit, NAPI_AUTO_LENGTH, &unit_string);
napi_set_named_property(env, measurement, "unit", unit_string);
napi_value values_array;
napi_create_array(env, &values_array);
for (size_t i = 0; i < size; i++) {
napi_value entry;
napi_create_object(env, &entry);
napi_value value;
napi_create_int64(env, values[i], &value);
napi_value ts;
napi_create_int64(env, timestamps[i], &ts);
napi_set_named_property(env, entry, "value", value);
napi_set_named_property(env, entry, "elapsed_since_start_ns", ts);
napi_set_element(env, values_array, i, entry);
}
napi_set_named_property(env, measurement, "values", values_array);
return measurement;
}
static napi_value TranslateProfile(const napi_env &env,
const v8::CpuProfile *profile,
const uint32_t thread_id,
bool collect_resources) {
napi_value js_profile;
napi_create_object(env, &js_profile);
napi_value logging_mode;
napi_value samples;
napi_value stacks;
napi_value frames;
napi_value resources;
napi_create_string_utf8(
env,
GetLoggingMode() == v8::CpuProfilingLoggingMode::kEagerLogging ? "eager"
: "lazy",
NAPI_AUTO_LENGTH, &logging_mode);
napi_create_array(env, &samples);
napi_create_array(env, &stacks);
napi_create_array(env, &frames);
napi_create_array(env, &resources);
napi_set_named_property(env, js_profile, "samples", samples);
napi_set_named_property(env, js_profile, "stacks", stacks);
napi_set_named_property(env, js_profile, "frames", frames);
napi_set_named_property(env, js_profile, "profiler_logging_mode",
logging_mode);
GetSamples(env, profile, thread_id, samples, stacks, frames, resources);
if (collect_resources) {
napi_set_named_property(env, js_profile, "resources", resources);
} else {
napi_create_array(env, &resources);
napi_set_named_property(env, js_profile, "resources", resources);
}
return js_profile;
}
static napi_value StartProfiling(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value argv[1];
assert(napi_get_cb_info(env, info, &argc, argv, NULL, NULL) == napi_ok);
napi_valuetype callbacktype0;
assert(napi_typeof(env, argv[0], &callbacktype0) == napi_ok);
if (callbacktype0 != napi_string) {
napi_throw_error(
env, "NAPI_ERROR",
"TypeError: StartProfiling expects a string as first argument.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
size_t len;
assert(napi_get_value_string_utf8(env, argv[0], NULL, 0, &len) == napi_ok);
char *title = (char *)malloc(len + 1);
assert(napi_get_value_string_utf8(env, argv[0], title, len + 1, &len) ==
napi_ok);
if (len < 1) {
napi_throw_error(env, "NAPI_ERROR",
"StartProfiling expects a non-empty string as first "
"argument, got an empty string.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
v8::Isolate *isolate = v8::Isolate::GetCurrent();
assert(isolate != 0);
Profiler *profiler;
assert(napi_get_instance_data(env, (void **)&profiler) == napi_ok);
if (!profiler) {
napi_throw_error(env, "NAPI_ERROR",
"StartProfiling: Profiler is not initialized.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
const std::string profile_id(title);
// In case we have a collision, cleanup the old profile first
auto existing_profile = profiler->active_profiles.find(profile_id);
if (existing_profile != profiler->active_profiles.end()) {
existing_profile->second->Stop(profiler);
CleanupSentryProfile(profiler, existing_profile->second, profile_id);
}
SentryProfile *sentry_profile = new SentryProfile(title);
sentry_profile->Start(profiler);
profiler->active_profiles.emplace(profile_id, sentry_profile);
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
// StopProfiling(string title)
// https://v8docs.nodesource.com/node-18.2/d2/d34/classv8_1_1_cpu_profiler.html#a40ca4c8a8aa4c9233aa2a2706457cc80
static napi_value StopProfiling(napi_env env, napi_callback_info info) {
size_t argc = 3;
napi_value argv[3];
assert(napi_get_cb_info(env, info, &argc, argv, NULL, NULL) == napi_ok);
if (argc < 2) {
napi_throw_error(env, "NAPI_ERROR",
"StopProfiling expects at least two arguments.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
// Verify the first argument is a string
napi_valuetype callbacktype0;
assert(napi_typeof(env, argv[0], &callbacktype0) == napi_ok);
if (callbacktype0 != napi_string) {
napi_throw_error(env, "NAPI_ERROR",
"StopProfiling expects a string as first argument.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
// Verify the second argument is a number
napi_valuetype callbacktype1;
assert(napi_typeof(env, argv[1], &callbacktype1) == napi_ok);
if (callbacktype1 != napi_number) {
napi_throw_error(
env, "NAPI_ERROR",
"StopProfiling expects a thread_id integer as second argument.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
size_t len;
assert(napi_get_value_string_utf8(env, argv[0], NULL, 0, &len) == napi_ok);
char *title = (char *)malloc(len + 1);
assert(napi_get_value_string_utf8(env, argv[0], title, len + 1, &len) ==
napi_ok);
if (len < 1) {
napi_throw_error(env, "NAPI_ERROR",
"StopProfiling expects a string as first argument.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
// Get the value of the second argument and convert it to uint64
int64_t thread_id;
assert(napi_get_value_int64(env, argv[1], &thread_id) == napi_ok);
// Get profiler from instance data
Profiler *profiler;
assert(napi_get_instance_data(env, (void **)&profiler) == napi_ok);
if (!profiler) {
napi_throw_error(env, "NAPI_ERROR",
"StopProfiling: Profiler is not initialized.");
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
const std::string profile_id(title);
auto profile = profiler->active_profiles.find(profile_id);
// If the profile was never started, silently ignore the call and return null
if (profile == profiler->active_profiles.end()) {
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
}
v8::CpuProfile *cpu_profile = profile->second->Stop(profiler);
// If for some reason stopProfiling was called with an invalid profile title
// or if that title had somehow been stopped already, profile will be null.
if (!cpu_profile) {
CleanupSentryProfile(profiler, profile->second, profile_id);
napi_value napi_null;
assert(napi_get_null(env, &napi_null) == napi_ok);
return napi_null;
};
napi_valuetype callbacktype3;
assert(napi_typeof(env, argv[2], &callbacktype3) == napi_ok);