feat(profiling): Add support for Profiling

sentry-core/Cargo.toml

@@ -25,15 +25,26 @@ client = ["rand"]
 # I would love to just have a `log` feature, but this is used inside a macro,
 # and macros actually expand features (and extern crate) where they are used!
 debug-logs = ["log_"]
-test = ["client"]
+test = ["client", "profiling"]
+profiling = ["pprof", "lazy_static", "mut_static", "build_id", "uuid", "sys-info", "findshlibs"]
 
 [dependencies]
 log_ = { package = "log", version = "0.4.8", optional = true, features = ["std"] }
 once_cell = "1"
 rand = { version = "0.8.1", optional = true }
 sentry-types = { version = "0.27.0", path = "../sentry-types" }
 serde = { version = "1.0.104", features = ["derive"] }
-serde_json = "1.0.46"
+serde_json = { version = "1.0.46" }
+lazy_static = { version = "1.4.0", optional = true }
+mut_static = { version = "5.0.0", optional = true }
+#pprof = { version = "0.10.0", optional = true }
+uuid = { version = "1.0.0", features = ["v4", "serde"], optional = true }
+sys-info = { version = "0.9.1", optional = true }
+build_id = { version = "0.2.1", optional = true }
+findshlibs = { version = "=0.10.2", optional = true }
+
+[target.'cfg(not(target_os = "windows"))'.dependencies]
+pprof = { version = "0.10.0", optional = true }
 
 [dev-dependencies]
 # Because we re-export all the public API in `sentry`, we actually run all the

sentry-core/src/client.rs

@@ -215,7 +215,7 @@ impl Client {
             scope.update_session_from_event(&event);
         }
 
-        if !self.sample_should_send() {
+        if !self.sample_should_send(self.options.sample_rate) {
             None
         } else {
             Some(event)
@@ -338,19 +338,9 @@ impl Client {
         }
     }
 
-    fn sample_should_send(&self) -> bool {
-        let rate = self.options.sample_rate;
-        if rate >= 1.0 {
-            true
-        } else {
-            random::<f32>() <= rate
-        }
-    }
-
     /// Returns a random boolean with a probability defined
-    /// by the [`ClientOptions`]'s `traces_sample_rate`
-    pub fn sample_traces_should_send(&self) -> bool {
-        let rate = self.options.traces_sample_rate;
+    /// by rate
+    pub fn sample_should_send(&self, rate: f32) -> bool {
         if rate >= 1.0 {
             true
         } else {

sentry-core/src/clientoptions.rs

@@ -74,6 +74,14 @@ pub struct ClientOptions {
     pub sample_rate: f32,
     /// The sample rate for tracing transactions. (0.0 - 1.0, defaults to 0.0)
     pub traces_sample_rate: f32,
+    /// Enables profiling
+    pub enable_profiling: bool,
+    /// The sample rate for profiling a transactions. (0.0 - 1.0, defaults to 0.0)
+    ///
+    /// This is dependent on `traces_sample_rate`. The probability of sending a profile
+    /// is given by `traces_sample_rate * profiles_sample_rate`.
+    /// If a given transaction is not sent, then the profile won't be sent neither.
+    pub profiles_sample_rate: f32,
     /// Maximum number of breadcrumbs. (defaults to 100)
     pub max_breadcrumbs: usize,
     /// Attaches stacktraces to messages.
@@ -183,6 +191,8 @@ impl fmt::Debug for ClientOptions {
             .field("environment", &self.environment)
             .field("sample_rate", &self.sample_rate)
             .field("traces_sample_rate", &self.traces_sample_rate)
+            .field("enable_profiling", &self.enable_profiling)
+            .field("profiles_sample_rate", &self.profiles_sample_rate)
             .field("max_breadcrumbs", &self.max_breadcrumbs)
             .field("attach_stacktrace", &self.attach_stacktrace)
             .field("send_default_pii", &self.send_default_pii)
@@ -215,6 +225,8 @@ impl Default for ClientOptions {
             environment: None,
             sample_rate: 1.0,
             traces_sample_rate: 0.0,
+            enable_profiling: false,
+            profiles_sample_rate: 0.0,
             max_breadcrumbs: 100,
             attach_stacktrace: false,
             send_default_pii: false,