From 52bc2facc2ec2e6834a0487c1a9e6e82d64094c0 Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Tue, 16 Jun 2020 09:21:19 -0400
Subject: [PATCH] add gdb to ci runners on debian to catch backtraces if they
 happen

---
 .drone.jsonnet           | 14 +++++++-------
 contrib/ci/drone-gdb.sh  |  5 +++++
 contrib/ci/gdb-filter.py | 23 +++++++++++++++++++++++
 3 files changed, 35 insertions(+), 7 deletions(-)
 create mode 100755 contrib/ci/drone-gdb.sh
 create mode 100644 contrib/ci/gdb-filter.py

diff --git a/.drone.jsonnet b/.drone.jsonnet
index 9b7f1a84f..a9bd0ea3e 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -38,16 +38,16 @@ local debian_pipeline(name, image,
                 'apt-get update',
                 'apt-get install -y eatmydata',
                 'eatmydata apt-get dist-upgrade -y',
-                'eatmydata apt-get install -y cmake git ninja-build pkg-config ccache ' + deps,
+                'eatmydata apt-get install -y gdb cmake git ninja-build pkg-config ccache ' + deps,
                 'mkdir build',
                 'cd build',
                 'cmake .. -G Ninja -DCMAKE_CXX_FLAGS=-fdiagnostics-color=always -DCMAKE_BUILD_TYPE='+build_type+' ' +
                     (if werror then '-DWARNINGS_AS_ERRORS=ON ' else '') +
                     (if lto then '' else '-DWITH_LTO=OFF ') +
-                    cmake_extra,
-                'ninja -v',
-                './test/testAll --gtest_color=yes',
-                './test/catchAll --use-colour yes',
+                cmake_extra,
+                'ninja clean && ninja -v',
+                '../contrib/ci/drone-gdb.sh ./test/testAll --gtest_color=yes',
+                '../contrib/ci/drone-gdb.sh ./test/catchAll --use-colour yes',
             ] + extra_cmds,
         }
     ],
@@ -86,7 +86,7 @@ local windows_cross_pipeline(name, image,
                     (if lto then '' else '-DWITH_LTO=OFF ') +
                     "-DBUILD_STATIC_DEPS=ON -DDOWNLOAD_SODIUM=ON -DBUILD_PACKAGE=OFF -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTING=ON -DNATIVE_BUILD=OFF -DSTATIC_LINK=ON" +
                     cmake_extra,
-                'ninja -v',
+                'ninja clean && ninja -v',
             ] + extra_cmds,
         }
     ],
@@ -158,7 +158,7 @@ local mac_builder(name, build_type='Release', werror=true, cmake_extra='', extra
                 'cmake .. -G Ninja -DCMAKE_CXX_FLAGS=-fcolor-diagnostics -DCMAKE_BUILD_TYPE='+build_type+' ' +
                     (if werror then '-DWARNINGS_AS_ERRORS=ON ' else '') +
                     cmake_extra,
-                'ninja -v',
+                'ninja clean && ninja -v',
                 './test/testAll --gtest_color=yes',
                 './test/catchAll --use-colour yes',
             ] + extra_cmds,
diff --git a/contrib/ci/drone-gdb.sh b/contrib/ci/drone-gdb.sh
new file mode 100755
index 000000000..151f41f93
--- /dev/null
+++ b/contrib/ci/drone-gdb.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+rm -f crash.out.txt exit.out.txt
+gdb -q -x $(readlink -e $(dirname $0))/gdb-filter.py --args $@
+test -e crash.out.txt && cat crash.out.txt
+exit $(cat exit.out.txt)
diff --git a/contrib/ci/gdb-filter.py b/contrib/ci/gdb-filter.py
new file mode 100644
index 000000000..cca44b5ed
--- /dev/null
+++ b/contrib/ci/gdb-filter.py
@@ -0,0 +1,23 @@
+def exit_handler (event):
+    code = 1
+    if hasattr(event, "exit_code"):
+        code = event.exit_code
+    with open("exit.out.txt", 'w') as f:
+        f.write("{}".format(code))
+
+def crash_handler (event):
+  if (isinstance(event, gdb.SignalEvent)):
+    log_file_name = "crash.out.txt"
+    gdb.execute("set logging file " + log_file_name )
+    gdb.execute("set logging on")
+    gdb.execute("set logging redirect on")
+    gdb.execute("thread apply all bt")
+    gdb.execute("q")
+
+gdb.events.stop.connect(crash_handler)
+        
+gdb.events.exited.connect(exit_handler)
+gdb.execute("set confirm off")
+gdb.execute("set pagination off")
+gdb.execute("r")
+gdb.execute("q")