Add test for ebpf::parse_tracepoint function

The test prepares tracepoint format file and run ebpf::parse_tracepoint on it. Then it compares expected struct output with actual function result. Signed-off-by: Jiri Olsa <[email protected]>
Ha-Dj · Mar 15, 2020 · b9099c5 · b9099c5
1 parent 7fd2fa6
commit b9099c5
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diff --git a/tests/cc/CMakeLists.txt b/tests/cc/CMakeLists.txt
@@ -31,7 +31,8 @@ set(TEST_LIBBCC_SOURCES
  test_sock_table.cc
  test_usdt_args.cc
  test_usdt_probes.cc
- utils.cc)
+ utils.cc
+ test_parse_tracepoint.cc)
 
 add_executable(test_libbcc ${TEST_LIBBCC_SOURCES})
 

diff --git a/tests/cc/test_parse_tracepoint.cc b/tests/cc/test_parse_tracepoint.cc
@@ -0,0 +1,69 @@
+#include "BPF.h"
+#include "catch.hpp"
+#include "common.h"
+
+TEST_CASE("test tracepoint parser", "[TracepointParser]") {
+ std::string format =
+ "name: sys_enter_read\n"
+ "ID: 650\n"
+ "format:\n"
+ " field:unsigned short common_type; offset:0; size:2; signed:0;\n"
+ " field:unsigned char common_flags; offset:2; size:1; signed:0;\n"
+ " field:unsigned char common_preempt_count; offset:3; size:1; signed:0;\n"
+ " field:int common_pid; offset:4; size:4; signed:1;\n"
+ "\n"
+ " field:int __syscall_nr; offset:8; size:4; signed:1;\n"
+ " field:unsigned int fd; offset:16; size:8; signed:0;\n"
+ " field:char * buf; offset:24; size:8; signed:0;\n"
+ " field:size_t count; offset:32; size:8; signed:0;\n"
+ "\n"
+ "print fmt: \"fd: 0x%08lx, buf: 0x%08lx, count: 0x%08lx\", ((unsigned long)(REC->fd)), ((unsigned long)(REC->buf)), ((unsigned long)(REC->count))\n";
+
+ std::string expected =
+ "struct tracepoint__syscalls__sys_enter_read {\n"
+ "\tu64 __do_not_use__;\n"
+ "\tint __syscall_nr;\n"
+ "\tu64 fd;\n"
+ "\tchar * buf;\n"
+ "\tsize_t count;\n"
+ "};\n";
+
+ {
+ std::istringstream input(format);
+ std::string result = ebpf::parse_tracepoint(input, "syscalls", "sys_enter_read");
+ REQUIRE(expected == result);
+ }
+
+ format =
+ "name: signal_deliver\n"
+ "ID: 114\n"
+ "format:\n"
+ " field:unsigned short common_type; offset:0; size:2; signed:0;\n"
+ " field:unsigned char common_flags; offset:2; size:1; signed:0;\n"
+ " field:unsigned char common_preempt_count; offset:3; size:1; signed:0;\n"
+ " field:int common_pid; offset:4; size:4; signed:1;\n"
+ "\n"
+ " field:int sig; offset:8; size:4; signed:1;\n"
+ " field:int errno; offset:12; size:4; signed:1;\n"
+ " field:int code; offset:16; size:4; signed:1;\n"
+ " field:unsigned long sa_handler; offset:24; size:8; signed:0;\n"
+ " field:unsigned long sa_flags; offset:32; size:8; signed:0;\n"
+ "\n"
+ "print fmt: \"sig=%d errno=%d code=%d sa_handler=%lx sa_flags=%lx\", REC->sig, REC->errno, REC->code, REC->sa_handler, REC->sa_flags\n";
+
+ expected =
+ "struct tracepoint__signal__signal_deliver {\n"
+ "\tu64 __do_not_use__;\n"
+ "\tint sig;\n"
+ "\tint errno;\n"
+ "\tint code;\n"
+ "\tunsigned long sa_handler;\n"
+ "\tunsigned long sa_flags;\n"
+ "};\n";
+
+ {
+ std::istringstream input(format);
+ std::string result = ebpf::parse_tracepoint(input, "signal", "signal_deliver");
+ REQUIRE(expected == result);
+ }
+}