apache / apisix-profilerConditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 67 units with 1,681 lines of code in units (56.1% of code).

1 very complex units (178 lines of code)
2 complex units (254 lines of code)
6 medium complex units (282 lines of code)
17 simple units (525 lines of code)
41 very simple units (442 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
void print_stack_trace() in profiler/stack_printer.cpp	178	53	3
static error_t parse_arg() in profiler/profile.cpp	115	31	3
int main() in profiler/profile.cpp	139	26	2
off_t get_elf_func_offset() in helpers/uprobe_helpers.c	61	21	2
int do_perf_event() in profiler/profile.bpf.c	41	15	1
static int create_tmp_vdso_image() in helpers/trace_helpers.c	58	13	1
bool kprobe_exists() in helpers/trace_helpers.c	43	13	1
static int syms__add_dso() in helpers/trace_helpers.c	46	11	3
void print_log2_hist() in helpers/trace_helpers.c	33	11	3
static int fix_lua_stack() in profiler/profile.bpf.c	47	10	3
static bool read_counts_map() in profiler/stack_printer.cpp	36	10	3
int get_pid_lib_path() in helpers/uprobe_helpers.c	37	10	4
static int dso__add_syms() in helpers/trace_helpers.c	27	9	5
static int dso__load_sym_table_from_elf() in helpers/trace_helpers.c	31	9	2
static inline int lua_get_funcdata() in profiler/profile.bpf.c	35	8	4
static void print_fold_lua_func() in profiler/stack_printer.cpp	34	8	2
static int ksyms__add_symbol() in helpers/trace_helpers.c	35	8	3
static bool is_file_backed() in helpers/trace_helpers.c	13	8	1
static int open_and_attach_perf_event() in profiler/profile.cpp	36	7	3
static bool read_batch_counts_map() in profiler/stack_printer.cpp	34	7	3
static int get_elf_text_scn_info() in helpers/trace_helpers.c	31	7	3
void print_linear_hist() in helpers/trace_helpers.c	25	7	5
static int attach_lua_uprobes() in profiler/profile.cpp	30	6	2
static void print_fold_user_stack_with_lua() in profiler/stack_printer.cpp	29	6	4
static int dso__load_sym_table() in helpers/trace_helpers.c	12	6	1
bool fentry_can_attach() in helpers/trace_helpers.c	33	6	2
static int probe_entry_lua_cancel() in profiler/profile.bpf.c	14	5	1
static int dso__add_sym() in helpers/trace_helpers.c	27	5	4
bool is_kernel_module() in helpers/trace_helpers.c	19	5	1
int resolve_binary_path() in helpers/uprobe_helpers.c	17	5	4
static int probe_entry_lua() in profiler/profile.bpf.c	15	4	1
static int get_elf_type() in helpers/trace_helpers.c	17	4	1
static void print_stars() in helpers/trace_helpers.c	14	4	3
int get_pid_binary_path() in helpers/uprobe_helpers.c	21	4	3
static int which_program() in helpers/uprobe_helpers.c	22	4	3
void lua_stack_map::insert_lua_stack_map() in profiler/lua_stacks_map.cpp	17	3	1
int lua_stack_map::get_lua_stack_backtrace() in profiler/lua_stacks_map.cpp	15	3	2
static int libbpf_print_fn() in profiler/profile.cpp	6	3	3
extern void LJ_ASSERT_NAME() in profiler/lua_state.h	9	3	1
static int ksym_cmp() in helpers/trace_helpers.c	7	3	2
static int sym_cmp() in helpers/trace_helpers.c	7	3	2
void syms__free() in helpers/trace_helpers.c	10	3	1
void syms_cache__free() in helpers/trace_helpers.c	10	3	1
void partitions__free() in helpers/trace_helpers.c	10	3	1
static bool fentry_try_attach() in helpers/trace_helpers.c	16	3	1
bool module_btf_exists() in helpers/trace_helpers.c	10	3	1
static int stack_id_err() in profiler/stack_printer.cpp	4	2	1
static int cmp_counts() in profiler/stack_printer.cpp	6	2	2
void ksyms__free() in helpers/trace_helpers.c	8	2	1
static void dso__free_fields() in helpers/trace_helpers.c	9	2	1