selftests/ftrace: Add tracepoint probe test case

Add test cases for tracepoint probe events.

Link: https://lore.kernel.org/all/168507477214.913472.11218388626709005588.stgit@mhiramat.roam.corp.google.com/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
index 53e0d56..dc25bcf 100644 (file)
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe.tc
@@ -1,7 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Generic dynamic event - add/remove fprobe events
-# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]": README
+# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README
 
 echo 0 > events/enable
 echo > dynamic_events

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
new file mode 100644 (file)
index 0000000..155792e
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe.tc
@@ -0,0 +1,27 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Generic dynamic event - add/remove tracepoint probe events
+# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README
+
+echo 0 > events/enable
+echo > dynamic_events
+
+TRACEPOINT1=kmem_cache_alloc
+TRACEPOINT2=kmem_cache_free
+
+echo "t:myevent1 $TRACEPOINT1" >> dynamic_events
+echo "t:myevent2 $TRACEPOINT2" >> dynamic_events
+
+grep -q myevent1 dynamic_events
+grep -q myevent2 dynamic_events
+test -d events/tracepoints/myevent1
+test -d events/tracepoints/myevent2
+
+echo "-:myevent2" >> dynamic_events
+
+grep -q myevent1 dynamic_events
+! grep -q myevent2 dynamic_events
+
+echo > dynamic_events
+
+clear_trace

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 48e7a1a..4065a21 100644 (file)
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
@@ -1,7 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Fprobe event parser error log check
-# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]": README
+# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README
 
 check_error() { # command-with-error-pos-by-^
     ftrace_errlog_check 'trace_fprobe' "$1" 'dynamic_events'

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
new file mode 100644 (file)
index 0000000..da117b8
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/tprobe_syntax_errors.tc
@@ -0,0 +1,82 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Tracepoint probe event parser error log check
+# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README
+
+check_error() { # command-with-error-pos-by-^
+    ftrace_errlog_check 'trace_fprobe' "$1" 'dynamic_events'
+}
+
+check_error 't^100 kfree'              # BAD_MAXACT_TYPE
+
+check_error 't ^non_exist_tracepoint'  # NO_TRACEPOINT
+check_error 't:^/bar kfree'            # NO_GROUP_NAME
+check_error 't:^12345678901234567890123456789012345678901234567890123456789012345/bar kfree'   # GROUP_TOO_LONG
+
+check_error 't:^foo.1/bar kfree'       # BAD_GROUP_NAME
+check_error 't:^ kfree'                        # NO_EVENT_NAME
+check_error 't:foo/^12345678901234567890123456789012345678901234567890123456789012345 kfree'   # EVENT_TOO_LONG
+check_error 't:foo/^bar.1 kfree'       # BAD_EVENT_NAME
+
+check_error 't kfree ^$retval'         # RETVAL_ON_PROBE
+check_error 't kfree ^$stack10000'     # BAD_STACK_NUM
+
+check_error 't kfree ^$arg10000'       # BAD_ARG_NUM
+
+check_error 't kfree ^$none_var'       # BAD_VAR
+check_error 't kfree ^%rax'            # BAD_VAR
+
+check_error 't kfree ^@12345678abcde'  # BAD_MEM_ADDR
+check_error 't kfree ^@+10'            # FILE_ON_KPROBE
+
+grep -q "imm-value" README && \
+check_error 't kfree arg1=\^x' # BAD_IMM
+grep -q "imm-string" README && \
+check_error 't kfree arg1=\"abcd^'     # IMMSTR_NO_CLOSE
+
+check_error 't kfree ^+0@0)'           # DEREF_NEED_BRACE
+check_error 't kfree ^+0ab1(@0)'       # BAD_DEREF_OFFS
+check_error 't kfree +0(+0(@0^)'       # DEREF_OPEN_BRACE
+
+if grep -A1 "fetcharg:" README | grep -q '\$comm' ; then
+check_error 't kfree +0(^$comm)'       # COMM_CANT_DEREF
+fi
+
+check_error 't kfree ^&1'              # BAD_FETCH_ARG
+
+
+# We've introduced this limitation with array support
+if grep -q ' <type>\\\[<array-size>\\\]' README; then
+check_error 't kfree +0(^+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(+0(@0))))))))))))))'      # TOO_MANY_OPS?
+check_error 't kfree +0(@11):u8[10^'           # ARRAY_NO_CLOSE
+check_error 't kfree +0(@11):u8[10]^a'         # BAD_ARRAY_SUFFIX
+check_error 't kfree +0(@11):u8[^10a]'         # BAD_ARRAY_NUM
+check_error 't kfree +0(@11):u8[^256]'         # ARRAY_TOO_BIG
+fi
+
+check_error 't kfree @11:^unknown_type'                # BAD_TYPE
+check_error 't kfree $stack0:^string'          # BAD_STRING
+check_error 't kfree @11:^b10@a/16'            # BAD_BITFIELD
+
+check_error 't kfree ^arg123456789012345678901234567890=@11'   # ARG_NAME_TOO_LOG
+check_error 't kfree ^=@11'                    # NO_ARG_NAME
+check_error 't kfree ^var.1=@11'               # BAD_ARG_NAME
+check_error 't kfree var1=@11 ^var1=@12'       # USED_ARG_NAME
+check_error 't kfree ^+1234567(+1234567(+1234567(+1234567(+1234567(+1234567(@1234))))))'       # ARG_TOO_LONG
+check_error 't kfree arg1=^'                   # NO_ARG_BODY
+
+
+# multiprobe errors
+if grep -q "Create/append/" README && grep -q "imm-value" README; then
+echo "t:tracepoint/testevent kfree" > dynamic_events
+check_error '^f:tracepoint/testevent kfree'    # DIFF_PROBE_TYPE
+
+# Explicitly use printf "%s" to not interpret \1
+printf "%s" "t:tracepoints/testevent kfree abcd=\\1" > dynamic_events
+check_error "t:tracepoints/testevent kfree ^bcd=\\1"   # DIFF_ARG_TYPE
+check_error "t:tracepoints/testevent kfree ^abcd=\\1:u8"       # DIFF_ARG_TYPE
+check_error "t:tracepoints/testevent kfree ^abcd=\\\"foo\"" # DIFF_ARG_TYPE
+check_error "^t:tracepoints/testevent kfree abcd=\\1"  # SAME_PROBE
+fi
+
+exit 0