signal info for coredump (#12011)

Author: kobzonega

ydb/deploy/docker/breakpad/minidump_script.py

@@ -3,8 +3,37 @@
 import json
 import subprocess
 import argparse
+import signal
 import os
 
+
+def signal_info(minidump_text):
+    minidump_lines = minidump_text.splitlines()
+
+    signal_name = "UNKNOWN"
+    signal_str = "no description"
+    for line in minidump_lines:
+        line = line.strip()
+        if line.startswith('Crash|'):
+            # "Crash|SIGSEGV|0x452e|0"
+            signal_name = line.split('|')[1]
+            break
+
+    try:
+        signal_code = getattr(signal, signal_name)
+        print(f"Signal name '{signal_name}' corresponds to signal number {signal_code}.")
+    except AttributeError:
+        print(f"Signal name '{signal_name}' is not a valid signal.")
+    else:
+        try:
+            signal_str = signal.strsignal(signal_code)
+            print(f"Signal code '{signal_code}' corresponds to signal description {signal_str}.")
+        except ValueError:
+            print(f"Signal code '{signal_code}' is not a valid value.")
+
+    return "Program terminated with signal {}, {}.".format(signal_name, signal_str)
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="Minidump files processing"
@@ -21,25 +50,33 @@
         elf_cmd = ["readelf", "-n", "/opt/ydb/bin/ydbd"]
         svnrev_cmd = ["/opt/ydb/bin/ydbd", "--svnrevision"]
         mndmp_cmd = ["/usr/bin/minidump-2-core", "-v", dmp_file, "-o", core_file]
+        stwlk_cmd = ["/usr/bin/minidump_stackwalk", "-m", dmp_file]
         gdb_cmd = [
             "/usr/bin/gdb",
             "-q",
             "-batch",
             "-iex=set auto-load safe-path /",
-            "-iex=set print thread-events off",
-            "-ex=backtrace",
             "-ex=thread apply all bt",
             "/opt/ydb/bin/ydbd",
             core_file,
         ]
 
         elf_resp = subprocess.check_output(elf_cmd).decode("utf-8")
         svnrev_resp = subprocess.check_output(svnrev_cmd).decode("utf-8")
-        subprocess.run(mndmp_cmd)
-        gdb_resp = subprocess.check_output(gdb_cmd).decode("utf-8")
+
+        subprocess.run(mndmp_cmd, stderr=subprocess.DEVNULL)
+        stwlk_resp = subprocess.check_output(stwlk_cmd, stderr=subprocess.DEVNULL).decode("utf-8")
+        gdb_resp = subprocess.check_output(gdb_cmd, stderr=subprocess.DEVNULL).decode("utf-8")
+        stacktrace = []
+        for line in gdb_resp.splitlines():
+            stacktrace.append(line)
+            if line.startswith("Core was generated"):
+                stacktrace.append(signal_info(stwlk_resp))
+        stacktrace_str = '\n'.join(stacktrace)
+
         os.remove(dmp_file)
         os.remove(core_file)
 
-        ret = json.dumps({"binary": "/opt/ydb/bin/ydbd", "readelf": elf_resp, "svnrevision": svnrev_resp, "stacktrace": gdb_resp})
+        ret = json.dumps({"binary": "/opt/ydb/bin/ydbd", "readelf": elf_resp, "svnrevision": svnrev_resp, "stacktrace": stacktrace_str})
         with open(json_file,"w") as out:
             out.write(ret)