Add ELF arch as app metadata

gprofiler/metadata/application_metadata.py

@@ -7,6 +7,7 @@
 from threading import Event, Lock
 from typing import Any, Dict, Optional
 
+from granulate_utils.linux.elf import elf_arch_to_uname_arch, get_elf_arch
 from granulate_utils.linux.process import is_process_running, process_exe, read_process_execfn
 from psutil import NoSuchProcess, Process, ZombieProcess
 
@@ -87,4 +88,19 @@ def make_application_metadata(self, process: Process) -> Dict[str, Any]:
             execfn = f"error: {e.__class__.__name__}"
         md["execfn"] = execfn
 
+        try:
+            # take arch from the executed elf, not the host system, because (although unlikely) it's possible
+            # that the process runs a different, emulated architecture.
+            arch = (
+                "error: not supported on Windows"
+                if is_windows()
+                else elf_arch_to_uname_arch(get_elf_arch(f"/proc/{process.pid}/exe"))
+            )
+        except (NoSuchProcess, ZombieProcess):
+            raise  # let caller handle
+        except Exception as e:
+            logger.exception("Exception while getting process exe architecture", pid=process.pid)
+            arch = f"error: {e.__class__.__name__}"
+        md["arch"] = arch
+
         return md

tests/test_app_metadata.py

@@ -3,6 +3,7 @@
 # Licensed under the AGPL3 License. See LICENSE.md in the project root for license information.
 #
 import json
+import platform
 from pathlib import Path
 from typing import Dict, List
 
@@ -34,6 +35,7 @@
                 else "buildid:a04b9016e15a247fbc21c91260c13e17a458ed33",
                 "python_version": "Python 3.6.15",
                 "sys_maxunicode": None,
+                "arch": platform.machine(),
             },
         ),
         (
@@ -52,6 +54,7 @@
                 "ruby_version": "ruby 2.6.7p197 (2021-04-05 revision 67941) [aarch64-linux]"
                 if is_aarch64()
                 else "ruby 2.6.7p197 (2021-04-05 revision 67941) [x86_64-linux]",
+                "arch": platform.machine(),
             },
         ),
         (
@@ -67,6 +70,7 @@
                 "libjvm_elfid": "buildid:33a1021cade63f16e30726be4111f20c34444764"
                 if is_aarch64()
                 else "buildid:622795512a2c037aec4d7ca6da05527dae86e460",
+                "arch": platform.machine(),
                 "jvm_flags": [
                     {
                         "name": "CICompilerCount",
@@ -152,6 +156,7 @@
                 "link": "dynamic",
                 "libc": "glibc",
                 "stripped": False,
+                "arch": platform.machine(),
             },
         ),
         (
@@ -164,6 +169,7 @@
                 "node_version": "v10.24.1",
                 "link": "dynamic",
                 "libc": "glibc",
+                "arch": platform.machine(),
             },
         ),
         (
@@ -174,6 +180,7 @@
                 "dotnet_version": "6.0.302",
                 "exe": "/usr/share/dotnet/dotnet",
                 "execfn": "/usr/bin/dotnet",
+                "arch": platform.machine(),
             },
         ),
     ],