Add tracers tests (New) (#735)

* Add: ptrace_test executable

This binary is intended to check availability of ptrace features.

Signed-off-by: Alexandre Esse <[email protected]>

* Add: ptrace test under new tracers unit

    This tracers unit got created because there is other possible tracers to be
tested such as ftrace.

Signed-off-by: Alexandre Esse <[email protected]>

* Add: ftrace tracer test

This test check running kernel config enabled ftrace.

Signed-off-by: Alexandre Esse <[email protected]>

* Add: tracefs file system test

This test checks for tracefs file system availability.
It should be used by ftrace.

Signed-off-by: Alexandre Esse <[email protected]>

* Add: resource for kernel config file

This file might be absent for different reasons:
  - disabled in kernel configuration
  - stored in a different location than the default one here (/boot/config-*)

Signed-off-by: Alexandre Esse <[email protected]>

---------

Signed-off-by: Alexandre Esse <[email protected]>

providers/base/src/EXECUTABLES

@@ -1,3 +1,4 @@
 alsa_test
 clocktest
 threaded_memtest
+ptrace_test

providers/base/src/Makefile

@@ -1,9 +1,9 @@
 .PHONY:
-all: alsa_test clocktest threaded_memtest
+all: alsa_test clocktest threaded_memtest ptrace_test
 
 .PHONY: clean
 clean:
-	rm -f alsa_test clocktest threaded_memtest
+	rm -f alsa_test clocktest threaded_memtest ptrace_test
 
 threaded_memtest: CFLAGS += -pthread
 threaded_memtest: CFLAGS += -Wno-unused-but-set-variable

providers/base/src/ptrace_test.c

@@ -0,0 +1,11 @@
+#include <sys/ptrace.h>
+#include <stdio.h>
+
+int main() {
+    if (ptrace(PTRACE_TRACEME, 0, 1, 0) < 0) {
+        // if ptrace() call return a negative value -> fail (or program is already beeing ptraced?)
+        return 1;
+    }
+
+    return 0;
+}

providers/base/units/tracers/jobs.pxu

@@ -0,0 +1,49 @@
+id: tracers/ptrace
+plugin: shell
+command:
+  if ptrace_test
+  then
+      echo "ptrace: supported"
+      exit 0
+  else
+      echo "ptrace: unsupported"
+      exit 1
+  fi
+_summary:
+ Tests the ptrace tracer availability
+_description:
+ The test initiates tracing using the ptrace syscall with ptrace_test binary (c source code).
+
+id: tracers/ftrace
+plugin: shell
+command: 
+  if grep -q -e "^CONFIG_FTRACE=y" /boot/config-"$(uname -r)"
+  then
+      echo "ftrace: supported"
+      exit 0
+  else
+      echo "ftrace: unsupported"
+      exit 1
+  fi
+_summary:
+ Tests ftrace kernel tracing infrastructure is enable
+_description:
+ Check if kernel configuration item CONFIG_FTRACE bool is set to 'y'.
+requires:
+  kernel_config_file.detected == 'true'
+
+id: tracers/tracefs
+plugin: shell
+command: 
+  if mount | grep -q tracefs
+  then
+      echo "tracefs: supported"
+      exit 0
+  else
+      echo "ftracefs: unsupported"
+      exit 1
+  fi
+_summary:
+ Tests the tracefs file system availability
+_description:
+ Check if the tracefs is mounted on a system using the mount command.

providers/base/units/tracers/resource.pxu

@@ -0,0 +1,12 @@
+id: kernel_config_file
+plugin: resource
+_summary:
+ Kernel config file resource
+command:
+ if [[ -f "/boot/config-$(uname -r)" ]]
+ then
+     echo "detected: true"
+ else
+     echo "detected: false"
+ fi
+_description: Check existence of kernel config file

providers/base/units/tracers/test-plan.pxu

@@ -0,0 +1,11 @@
+id: tracers
+unit: test plan
+_name: Tracers tests
+_description:
+ Tracers tests
+include:
+    tracers/ftrace
+    tracers/ptrace
+    tracers/tracefs
+bootstrap_include:
+    kernel_config_file