Update nix 0.26 -> 0.27 (#755)

blt · web-flow · commit a29e0e8250c2 · 2023-11-30T14:57:43.000-08:00
* Update nix 0.26 -> 0.27 REF SMPTNG-94 Signed-off-by: Brian L. Troutwine <brian.troutwine@datadoghq.com> * overflow sub Signed-off-by: Brian L. Troutwine <brian.troutwine@datadoghq.com> --------- Signed-off-by: Brian L. Troutwine <brian.troutwine@datadoghq.com>
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/lading/Cargo.toml b/lading/Cargo.toml
@@ -26,7 +26,7 @@ is_executable = "1.0.1"
 metrics = { workspace = true }
 metrics-exporter-prometheus = { version = "0.12.1", default-features = false, features = ["http-listener"]}
 metrics-util = { version = "0.15" }
-nix = { version = "0.26" }
+nix = { version = "0.27", default-features = false, features = ["process", "signal"] }
 num_cpus = { version = "1.16" }
 once_cell = "1.18"
 quanta = { version = "0.11", default-features = false, features = [] }
diff --git a/lading/src/observer/linux.rs b/lading/src/observer/linux.rs
@@ -152,7 +152,7 @@ impl Sampler {
             // Calculate process uptime. We have two pieces of information from
             // the kernel: computer uptime and process starttime relative to
             // power-on of the computer.
-            let uptime: u64 = uptime_ticks - stats.starttime; // ticks
+            let uptime: u64 = uptime_ticks.saturating_sub(stats.starttime); // ticks
 
             // The times that the process and the processes' waited for children
             // have been scheduled in kernel and user space. We exclude cstime,
