[gambit-list] Static tools for detecting possible code bugs.

Bradley Lucier lucier at math.purdue.edu
Wed Apr 13 21:54:27 EDT 2016


Recently I’ve been intrigued with what tools are available to check for possible correctness problems in code, either statically (at compile time through a static analyzer, say) or dynamically (at runtime through, e.g., a so-called sanitizer).

Here is a free link to a (currently) subscriber-only news article at LWN.net about static analysis tools that some people use to check for possible errors in the Linux kernel:

https://lwn.net/SubscriberLink/683476/93d19173045da031/

I subscribe to LWN.net (Linux Weekly News), but I’ve never sent a link to a newsgroup before, so we’ll see whether I get chastised for it. Let’s just say it’s advertising for LWN.net.

I downloaded and built smatch, for example, and played with it a bit without gaining much insight. I ran it on all generated .i files in gambit/lib after adding -save-temps to the GCC command; the warnings are a the end of this email.  Some of the warnings were for code in header files, and other (such as "inconsistent indenting”) may not be so relevant for machine-generated code.

It did flag a few things it called “error”s, so these should be checked, I guess.

Brad

firefly:~/programs/gambit/gambit> ../smatch lib/*.i
Warning: /home/lucier/share/smatch/smatch_data/ is not accessible.
Use --no-data or --data to suppress this message.
lib/_eval.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_eval.i:34939:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_eval.i:12427 ___H__20___eval() warn: inconsistent indenting
lib/_eval.i:34943 ___init_mod() warn: inconsistent indenting
lib/_eval.i:2187 __signbitl() warn: inconsistent indenting
lib/_gambit.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_gambit.i:2187 __signbitl() warn: inconsistent indenting
lib/_io.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_io.i:83357:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_io.i:16065 ___H__20___io() warn: inconsistent indenting
lib/_io.i:47995 ___H__20___io() warn: inconsistent indenting
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lib/_io.i:53778 ___H__20___io() warn: inconsistent indenting
lib/_io.i:83361 ___init_mod() warn: inconsistent indenting
lib/_io.i:2187 __signbitl() warn: inconsistent indenting
lib/_kernel.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_kernel.i:34103:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_kernel.i:18730 ___H__20___kernel() warn: inconsistent indenting
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lib/_kernel.i:32399 ___H__20___kernel() warn: inconsistent indenting
lib/_kernel.i:32416 ___H__20___kernel() warn: inconsistent indenting
lib/_kernel.i:34107 ___init_mod() warn: inconsistent indenting
lib/_kernel.i:2187 __signbitl() warn: inconsistent indenting
lib/_nonstd.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_nonstd.i:25603:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_nonstd.i:8660 ___H__20___nonstd() warn: inconsistent indenting
lib/_nonstd.i:25607 ___init_mod() warn: inconsistent indenting
lib/_nonstd.i:2187 __signbitl() warn: inconsistent indenting
lib/_num.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_num.i:73313:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_num.i:19533 ___H__20___num() warn: inconsistent indenting
lib/_num.i:50383 ___H__20___num() warn: inconsistent indenting
lib/_num.i:50398 ___H__20___num() warn: inconsistent indenting
lib/_num.i:50479 ___H__20___num() warn: inconsistent indenting
lib/_num.i:50544 ___H__20___num() warn: inconsistent indenting
lib/_num.i:50655 ___H__20___num() warn: inconsistent indenting
lib/_num.i:73317 ___init_mod() warn: inconsistent indenting
lib/_num.i:2187 __signbitl() warn: inconsistent indenting
lib/_repl.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_repl.i:36278:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_repl.i:12886 ___H__20___repl() warn: inconsistent indenting
lib/_repl.i:36282 ___init_mod() warn: inconsistent indenting
lib/_repl.i:2187 __signbitl() warn: inconsistent indenting
lib/_std.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_std.i:53812:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_std.i:18142 ___H__20___std() warn: inconsistent indenting
lib/_std.i:19830 ___H__20___std() warn: inconsistent indenting
lib/_std.i:19875 ___H__20___std() warn: inconsistent indenting
lib/_std.i:21460 ___H__20___std() warn: inconsistent indenting
lib/_std.i:21505 ___H__20___std() warn: inconsistent indenting
lib/_std.i:23143 ___H__20___std() warn: inconsistent indenting
lib/_std.i:23188 ___H__20___std() warn: inconsistent indenting
lib/_std.i:24810 ___H__20___std() warn: inconsistent indenting
lib/_std.i:24855 ___H__20___std() warn: inconsistent indenting
lib/_std.i:26477 ___H__20___std() warn: inconsistent indenting
lib/_std.i:26522 ___H__20___std() warn: inconsistent indenting
lib/_std.i:28144 ___H__20___std() warn: inconsistent indenting
lib/_std.i:28189 ___H__20___std() warn: inconsistent indenting
lib/_std.i:30026 ___H__20___std() warn: inconsistent indenting
lib/_std.i:30071 ___H__20___std() warn: inconsistent indenting
lib/_std.i:31969 ___H__20___std() warn: inconsistent indenting
lib/_std.i:32014 ___H__20___std() warn: inconsistent indenting
lib/_std.i:33912 ___H__20___std() warn: inconsistent indenting
lib/_std.i:33957 ___H__20___std() warn: inconsistent indenting
lib/_std.i:35855 ___H__20___std() warn: inconsistent indenting
lib/_std.i:35900 ___H__20___std() warn: inconsistent indenting
lib/_std.i:37559 ___H__20___std() warn: inconsistent indenting
lib/_std.i:37604 ___H__20___std() warn: inconsistent indenting
lib/_std.i:39202 ___H__20___std() warn: inconsistent indenting
lib/_std.i:39247 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49008 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49062 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49089 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49135 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49162 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49208 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49235 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49281 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49308 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49354 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49381 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49427 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49454 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49500 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49527 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49573 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49600 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49646 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49673 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49719 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49746 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49792 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49819 ___H__20___std() warn: inconsistent indenting
lib/_std.i:49865 ___H__20___std() warn: inconsistent indenting
lib/_std.i:53816 ___init_mod() warn: inconsistent indenting
lib/_std.i:2187 __signbitl() warn: inconsistent indenting
lib/_system.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_system.i:19377:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_system.i:7014 ___H__20___system() warn: inconsistent indenting
lib/_system.i:7300 ___H__20___system() warn: inconsistent indenting
lib/_system.i:19381 ___init_mod() warn: inconsistent indenting
lib/_system.i:2187 __signbitl() warn: inconsistent indenting
lib/_thread.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/_thread.i:24731:26: warning: non-ANSI function declaration of function '___init_mod'
lib/_thread.i:7990 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:15924 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:15926 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:15933 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:21655 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:21734 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:22622 ___H__20___thread() warn: inconsistent indenting
lib/_thread.i:24735 ___init_mod() warn: inconsistent indenting
lib/_thread.i:2187 __signbitl() warn: inconsistent indenting
lib/actlog.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/c_intf.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/c_intf.i:2187 __signbitl() warn: inconsistent indenting
lib/main.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/main.i:14667 extend_strvec() error: we previously assumed 'old_strvec' could be null (see line 14657)
lib/main.i:2187 __signbitl() warn: inconsistent indenting
lib/mem.i:2191:64: warning: obsolete struct initializer, use C99 syntax
lib/mem.i:16416:5: warning: non-ANSI function declaration of function 'mark_continuation'
lib/mem.i:16477:5: warning: non-ANSI function declaration of function 'mark_rc'
lib/mem.i:16657:5: warning: non-ANSI function declaration of function 'setup_still_objs_to_scan'
lib/mem.i:16682:5: warning: non-ANSI function declaration of function 'scan_still_objs_to_scan'
lib/mem.i:16698:5: warning: non-ANSI function declaration of function 'scan_movable_objs_to_scan'
lib/mem.i:16752:5: warning: non-ANSI function declaration of function 'free_unmarked_still_objs'
lib/mem.i:17163:5: warning: non-ANSI function declaration of function 'process_wills'
lib/mem.i:17231:5: warning: non-ANSI function declaration of function 'process_gc_hash_tables'
lib/mem.i:17899:5: warning: non-ANSI function declaration of function 'move_continuation'
lib/mem.i:18070:5: warning: non-ANSI function declaration of function 'mark_registers'
lib/mem.i:18085:5: warning: non-ANSI function declaration of function 'mark_current_thread'
lib/mem.i:18151:5: warning: non-ANSI function declaration of function 'mark_symkey_tables'
lib/mem.i:18167:5: warning: non-ANSI function declaration of function 'mark_reachable_from_marked'
lib/mem.i:18182:5: warning: non-ANSI function declaration of function 'garbage_collect_setup_phase'
lib/mem.i:18223:5: warning: non-ANSI function declaration of function 'garbage_collect_mark_strong_phase'
lib/mem.i:18256:5: warning: non-ANSI function declaration of function 'garbage_collect_mark_weak_phase'
lib/mem.i:18277:5: warning: non-ANSI function declaration of function 'garbage_collect_cleanup_phase'
lib/mem.i:18422:5: warning: non-ANSI function declaration of function '___stack_limit'
lib/mem.i:18474:5: warning: non-ANSI function declaration of function '___heap_limit'
lib/mem.i:18509:5: warning: non-ANSI function declaration of function '___bytes_allocated'
lib/mem.i:15013 adjust_msections() error: we previously assumed 'ms' could be null (see line 14973)
lib/mem.i:16628 scan() warn: inconsistent indenting
lib/mem.i:16825 adjust_heap() debug: sval_binop_signed: invalid divide LLONG_MIN/-1
lib/mem.i:2192 __signbitl() warn: inconsistent indenting
lib/os.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os.i:16581 ___SCMOBJ_to_sockaddr() warn: inconsistent indenting
lib/os.i:16603 ___SCMOBJ_to_sockaddr() warn: inconsistent indenting
lib/os.i:16645 ___sockaddr_to_SCMOBJ() warn: inconsistent indenting
lib/os.i:16670 ___sockaddr_to_SCMOBJ() warn: inconsistent indenting
lib/os.i:16962 ___os_host_info() warn: inconsistent indenting
lib/os.i:17282 ___os_service_info() warn: inconsistent indenting
lib/os.i:17298 ___os_service_info() warn: inconsistent indenting
lib/os.i:17328 ___os_service_info() error: we previously assumed 'se' could be null (see line 17304)
lib/os.i:17380 ___os_service_info() warn: inconsistent indenting
lib/os.i:17437 ___os_protocol_info() warn: inconsistent indenting
lib/os.i:17472 ___os_protocol_info() error: we previously assumed 'pe' could be null (see line 17451)
lib/os.i:2187 __signbitl() warn: inconsistent indenting
lib/os_base.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_base.i:14735 ___fatal_error() error: buffer overflow 'new_msgs' 100 <= 100
lib/os_base.i:2187 __signbitl() warn: inconsistent indenting
lib/os_dyn.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_dyn.i:2187 __signbitl() warn: inconsistent indenting
lib/os_files.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_files.i:2187 __signbitl() warn: inconsistent indenting
lib/os_io.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_io.i:16145 ___device_select() warn: inconsistent indenting
lib/os_io.i:16370 ___device_select_add_fd() warn: inconsistent indenting
lib/os_io.i:16388 ___device_select_add_fd() warn: inconsistent indenting
lib/os_io.i:16946 ___device_pipe_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:16971 ___device_pipe_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:17678 ___device_tcp_client_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:17695 ___device_tcp_client_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:18236 ___device_tcp_server_select_virt() warn: inconsistent indenting
lib/os_io.i:18930 ___device_file_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:18947 ___device_file_select_raw_virt() warn: inconsistent indenting
lib/os_io.i:19710 open_full_duplex_pipe1() warn: inconsistent indenting
lib/os_io.i:19762 open_full_duplex_pipe2() warn: inconsistent indenting
lib/os_io.i:19978 ___device_stream_setup_from_process() warn: inconsistent indenting
lib/os_io.i:2187 __signbitl() warn: inconsistent indenting
lib/os_shell.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_thread.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_thread.i:2187 __signbitl() warn: inconsistent indenting
lib/os_time.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_time.i:2187 __signbitl() warn: inconsistent indenting
lib/os_tty.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/os_tty.i:16785 ___device_tty_force_open() warn: missing break? reassigning 'd->stage'
lib/os_tty.i:17285 lineeditor_dkey_install() warn: inconsistent indenting
lib/os_tty.i:17869 lineeditor_output_cap3() warn: curly braces intended?
lib/os_tty.i:17926 lineeditor_output_cap3() warn: inconsistent indenting
lib/os_tty.i:21290 lineeditor_line_done() error: we previously assumed 'input_line->buffer' could be null (see line 21260)
lib/os_tty.i:21934 ___device_tty_select_raw_virt() warn: inconsistent indenting
lib/os_tty.i:21962 ___device_tty_select_raw_virt() warn: inconsistent indenting
lib/os_tty.i:2187 __signbitl() warn: inconsistent indenting
lib/setup.i:2186:64: warning: obsolete struct initializer, use C99 syntax
lib/setup.i:14853:5: warning: non-ANSI function declaration of function 'barrier_sync_noop'
lib/setup.i:15011:5: warning: non-ANSI function declaration of function 'service_sync_op'
lib/setup.i:15086:5: warning: non-ANSI function declaration of function '___actlog_start'
lib/setup.i:15102:5: warning: non-ANSI function declaration of function '___actlog_stop'
lib/setup.i:15127 align() warn: inconsistent indenting
lib/setup.i:16458 ___call() warn: inconsistent indenting
lib/setup.i:16502 ___run() warn: inconsistent indenting
lib/setup.i:2187 __signbitl() warn: inconsistent indenting
firefly:~/programs/gambit/gambit> 


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