[mq] [skip ddci] working branch - merge 1b5f105 on top of main at 8f611f3

{"baseBranch":"main","baseCommit":"8f611f35b75ecf59c84b3b3545c8f5babc4d1739","createdAt":"2026-03-16T22:16:14.192394Z","headSha":"1b5f105c4e5db1bf216f138b71a07be9621d7c4f","id":"e1aa1526-9c0f-4bae-a172-695c79574663","nextMergeabilityCheckAt":"2026-03-16T23:36:01.906176Z","priority":"200","pullRequestNumber":"1741","queuedAt":"2026-03-16T22:36:05.982279Z","status":"STATUS_QUEUED"}

Author: gh-worker-dd-mergequeue-cf854d[bot]

libdd-crashtracker/src/crash_info/errors_intake.rs

@@ -5,7 +5,7 @@ use std::time::SystemTime;
 
 use crate::{OsInfo, SigInfo};
 
-use super::{build_crash_ping_message, CrashInfo, Experimental, Metadata, StackTrace};
+use super::{build_crash_ping_message, CrashInfo, Experimental, Metadata, StackTrace, LIBC};
 use anyhow::Context;
 use chrono::{DateTime, Utc};
 use http::{uri::PathAndQuery, Uri};
@@ -363,6 +363,7 @@ fn build_crash_info_tags(crash_info: &CrashInfo) -> String {
         append_signal_tags(&mut tags, siginfo);
     }
 
+    tags.push_str(&format!(",libc:{LIBC}"));
     tags
 }
 
@@ -456,6 +457,8 @@ impl ErrorsIntakePayload {
             append_signal_tags(&mut ddtags, sig_info);
         }
 
+        ddtags.push_str(&format!(",libc:{LIBC}"));
+
         let (error_type, message) = if let Some(sig_info) = sig_info {
             (
                 Some(format!("{:?}", sig_info.si_signo_human_readable)),
@@ -689,6 +692,7 @@ mod tests {
             "si_code_human_readable:SEGV_BNDERR",
             "si_signo:11",
             "si_signo_human_readable:SIGSEGV",
+            &format!("libc:{}", super::super::LIBC),
         ];
 
         let expected_metadata_tags = ["service:foo", "version:bar", "language_name:native"];
@@ -726,6 +730,7 @@ mod tests {
             "si_code_human_readable:SEGV_BNDERR",
             "si_signo:11",
             "si_signo_human_readable:SIGSEGV",
+            &format!("libc:{}", super::super::LIBC),
         ];
 
         for tag in expected_tags {

libdd-crashtracker/src/crash_info/mod.rs

@@ -17,6 +17,15 @@ mod telemetry;
 mod test_utils;
 mod unknown_value;
 
+#[cfg(target_env = "musl")]
+pub(crate) const LIBC: &str = "musl";
+#[cfg(target_env = "gnu")]
+pub(crate) const LIBC: &str = "glibc";
+#[cfg(target_env = "msvc")]
+pub(crate) const LIBC: &str = "msvc";
+#[cfg(not(any(target_env = "musl", target_env = "gnu", target_env = "msvc")))]
+pub(crate) const LIBC: &str = "";
+
 pub use builder::*;
 pub use error_data::*;
 pub use errors_intake::*;

libdd-crashtracker/src/crash_info/telemetry.rs

@@ -4,7 +4,7 @@ use std::{fmt::Write, time::SystemTime};
 
 use crate::{ErrorKind, SigInfo};
 
-use super::{CrashInfo, Metadata};
+use super::{CrashInfo, Metadata, LIBC};
 use anyhow::Context;
 use chrono::{DateTime, Utc};
 use libdd_common::Endpoint;
@@ -396,6 +396,7 @@ impl TelemetryCrashUploader {
             ));
         }
 
+        write!(tags, ",libc:{LIBC}").ok();
         self.append_optional_tags(&mut tags);
         tags
     }
@@ -448,6 +449,7 @@ fn extract_crash_info_tags(crash_info: &CrashInfo) -> anyhow::Result<String> {
             siginfo.si_signo_human_readable
         )?;
     }
+    write!(&mut tags, ",libc:{LIBC}")?;
     Ok(tags)
 }
 
@@ -556,6 +558,7 @@ mod tests {
                 "si_signo_human_readable:SIGSEGV",
                 "si_signo:11",
                 "uuid:1d6b97cb-968c-40c9-af6e-e4b4d71e8781",
+                &format!("libc:{}", super::super::LIBC),
             ]),
             tags
         );