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An OCaml newbie meets Camlp4 parser

This document discusses modifying the parser for the VeriFast verifier to better support verifying C code. VeriFast currently uses a Camlp4 parser that is a subset of C99, which can cause issues when verifying real C code that uses aspects beyond this subset. The document proposes patching VeriFast's parser to add support for parsing semicolons without declarations, hard tabs in string literals, the inline keyword, and operators in macros. The goal is to use the modified parser to verify code from the NetBSD kernel as a test case.

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An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser Kiwamu OkabeKiwamu OkabeKiwamu OkabeKiwamu OkabeKiwamu Okabe
Why use Camlp4 parser?Why use Camlp4 parser?Why use Camlp4 parser?Why use Camlp4 parser?Why use Camlp4 parser? ☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser? ☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.
What is VeriFast verifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1 ☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.
What is VeriFast verifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2
What is VeriFast verifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3
VeriFast has own C language parserVeriFast has own C language parserVeriFast has own C language parserVeriFast has own C language parserVeriFast has own C language parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser
Why modify VeriFast parser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1
Why modify VeriFast parser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2 ☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers. ☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code. ☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser.
What is a near-term goal?What is a near-term goal?What is a near-term goal?What is a near-term goal?What is a near-term goal? ☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard. ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c ☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following: ☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src
Original verifierOriginal verifierOriginal verifierOriginal verifierOriginal verifier
Modified verifierModified verifierModified verifierModified verifierModified verifier
My patches for VeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parser * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116
Knowledge to debug parser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1 ☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace. $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) ->
Knowledge to debug parser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460
Knowledge to debug parser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1 ☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions. let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n"
Knowledge to debug parser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1 ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream
Knowledge to debug parser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18
Let's join the VeriFast project!Let's join the VeriFast project!Let's join the VeriFast project!Let's join the VeriFast project!Let's join the VeriFast project! ☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world. ☆ To get better parser.☆ To get better parser.☆ To get better parser.☆ To get better parser.☆ To get better parser.
Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回 ☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12. ☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/ ☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like: ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.
Ads: Functional Ikamusume bookAds: Functional Ikamusume bookAds: Functional Ikamusume bookAds: Functional Ikamusume bookAds: Functional Ikamusume book ☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana. http://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.html ☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it! ☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94. ☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24. ☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA: ☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke
License of photosLicense of photosLicense of photosLicense of photosLicense of photos * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0

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An OCaml newbie meets Camlp4 parser

  • 1.
    An OCaml newbiemeets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser An OCaml newbie meets Camlp4 parser Kiwamu OkabeKiwamu OkabeKiwamu OkabeKiwamu OkabeKiwamu Okabe
  • 2.
    Why use Camlp4parser?Why use Camlp4 parser?Why use Camlp4 parser?Why use Camlp4 parser?Why use Camlp4 parser? ☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser?☆ Why not use the Menhir as parser? ☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.☆ Because VeriFast verifier uses Camlp4 parser.
  • 3.
    What is VeriFastverifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1What is VeriFast verifier? #1 ☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast☆ https://github.com/verifast/verifast ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ A verifier for single-threaded and multi- threaded C and Java language programs annotated with preconditions and postconditions written in separation logic. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast avoids illegal memory accesses such like buffer overflow. ☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.☆ VeriFast is written by OCaml.
  • 4.
    What is VeriFastverifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2What is VeriFast verifier? #2
  • 5.
    What is VeriFastverifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3What is VeriFast verifier? #3
  • 6.
    VeriFast has ownC language parserVeriFast has own C language parserVeriFast has own C language parserVeriFast has own C language parserVeriFast has own C language parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser let rec parse_decls ?inGhostHeader = if match inGhostHeader with None -> false | Some b -> b then parse_pure_decls else parse_decls_core and parse_decls_core = parser [< '((p1, _), Kwd "/*@"); ds = parse_pure_decls; '((_, p2), Kwd "@*/"); ds' = parse_decls_core >] -> ds @ ds' | [< _ = opt (parser [< '(_, Kwd "public") >] -> ()); abstract = (parser [< '(_, Kwd "abstract") >] -> true | [< >] -> false); final = (parser [< '(_, Kwd "final") >] -> FinalClass | [< >] -> ExtensibleClass); ds = begin parser
  • 7.
    Why modify VeriFastparser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1Why modify VeriFast parser? #1
  • 8.
    Why modify VeriFastparser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2Why modify VeriFast parser? #2 ☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers.☆ Real usage needs two C language headers. ☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code.☆ Original C header is for compiling C code. ☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code.☆ Pseud C header is for verifying C code. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ They may have some semantic gaps, which cause miss verification. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser. ☆ Because VeriFast's parser is a subset of C99 parser.
  • 9.
    What is anear-term goal?What is a near-term goal?What is a near-term goal?What is a near-term goal?What is a near-term goal? ☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard.☆ Getting C99 compatible parser is hard. ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: ☆ Let's verify "kern/subr_optstr.c" file in NetBSD kernel: $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c $ sh build.sh -U -u -j 4 -T obj/tooldir -m amd64 tools $ sh build.sh -U -u -j 1 -T obj/tooldir -m amd64 kernel=GENERIC $ vfide -D __STDC__ -D __GNUC__ -D _KERNEL -D __ELF__ -D NO_KERNEL_RCSIDS -I sys -I sys/arch/amd64/compile/obj/GENERIC sys/kern/subr_optstr.c ☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following:☆ The kernel code is found at following: ☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src☆ https://github.com/IIJ-NetBSD/netbsd-src
  • 10.
    Original verifierOriginal verifierOriginalverifierOriginal verifierOriginal verifier
  • 11.
    Modified verifierModified verifierModifiedverifierModified verifierModified verifier
  • 12.
    My patches forVeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parserMy patches for VeriFast's parser * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116 * Parse semicolon without any declarations #121 https://github.com/verifast/verifast/pull/121 * Allow hardtab in string literals #120 https://github.com/verifast/verifast/pull/120 * Ignore inline keyword at static function declaration #119 https://github.com/verifast/verifast/pull/119 * Support operators in macros / Add -D option #116 https://github.com/verifast/verifast/pull/116
  • 13.
    Knowledge to debugparser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1Knowledge to debug parser #1-1 ☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace.☆ Don't catch exception to get stack trace. $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) -> $ git diff diff --git a/src/vfconsole.ml b/src/vfconsole.ml index 8846dcb5..9204c2a4 100644 --- a/src/vfconsole.ml +++ b/src/vfconsole.ml @@ -23,7 +23,6 @@ let _ = Java_frontend_bridge.unload(); with PreprocessorDivergence (l, msg) -> print_msg l msg; exit 1 - | ParseException (l, msg) -> print_msg l ("Parse error" ^ ... | CompilationError(msg) -> print_endline (msg); exit 1 | StaticError (l, msg, url) -> print_msg l msg; exit 1 | SymbolicExecutionError (ctxts, l, msg, url) ->
  • 14.
    Knowledge to debugparser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2Knowledge to debug parser #1-2 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460 $ cat tab_in_printf.c #include <stdio.h> int main() { printf("Use hard tabn"); return 0; } $ OCAMLRUNPARAM=b verifast -c tab_in_printf.c tab_in_printf.c Fatal error: exception Lexer.ParseException(_, "") Raised at file "parser.ml", line 1627, characters 26-61 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 Called from file "verifast.ml", line 2922, characters 17-1023 Called from file "verifast.ml", line 3130, characters 18-460
  • 15.
    Knowledge to debugparser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1Knowledge to debug parser #2-1 ☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions.☆ Dump "token" using debug functions. let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n" let rec print_tokens_list tokens = match tokens with [(_, tok)] -> Printf.printf "%sn" (string_of_token tok) | (_, tok) :: xs -> Printf.printf "%s, " (string_of_token tok); print_tokens_list xs | [] -> Printf.printf "n" let rec print_tokens_stream tokens = Printf.printf "[n"; Stream.iter (fun (_, tok) -> Printf.printf " %sn" (string_of_token tok)) tokens; Printf.printf "]n"
  • 16.
    Knowledge to debugparser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1Knowledge to debug parser #3-1 ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". ☆ Exception "Stream.Error" has a string parameter specified by "??". $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml $ wc -l src/parser.ml 1801 src/parser.ml $ vi src/parser.ml let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream let parse_c_file = parser [< (headers, _) = parse_include_directives ignore_eol verbose enforceAnnotations dataModel; ds = parse_decls CLang dataModel enforceAnnotations ~inGhostHeader:false; _ = Stream.empty ?? "Stream.empty expected" (* <= *) >] -> (headers, [PackageDecl(dummy_loc,"",[],ds)]) in parse_c_file token_stream
  • 17.
    Knowledge to debugparser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2Knowledge to debug parser #3-2 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18 $ cat main.c ; #include <stdio.h> $ OCAMLRUNPARAM=b verifast -c main.c main.c Fatal error: exception Lexer.Stream.Error("Stream.empty expected") # <= Raised at file "parser.ml", line 1629, characters 6-312 Called from file "parser.ml", line 1634, characters 6-31 Called from file "verifast.ml", line 2966, characters 12-185 Called from file "verifast1.ml", line 470, characters 6-13 Called from file "util.ml" (inlined), line 109, characters 15-18
  • 18.
    Let's join theVeriFast project!Let's join the VeriFast project!Let's join the VeriFast project!Let's join the VeriFast project!Let's join the VeriFast project! ☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world.☆ To verify C language on real world. ☆ To get better parser.☆ To get better parser.☆ To get better parser.☆ To get better parser.☆ To get better parser.
  • 19.
    Ads: 静的コード解析の会 第7回Ads:静的コード解析の会 第7回Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回Ads: 静的コード解析の会 第7回 ☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12.☆ The meeting will be held on 2018-05-12. ☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/☆ https://metasepi.connpass.com/event/77398/ ☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like:☆ Discussing about static code analysis such like: ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ATS, B-Method, CBMC, Coq, Coverity Scan, CSP, Dafny, F*, Frama-C, FreeSafeTy, Infer, Isabelle, SATABS, SPARK, Spin, Uppaal, VDM, VeriFast, Why3, boogie, cogent, corral, seL4, vcc, etc. ☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.☆ We are calling for presentation.
  • 20.
    Ads: Functional IkamusumebookAds: Functional Ikamusume bookAds: Functional Ikamusume bookAds: Functional Ikamusume bookAds: Functional Ikamusume book ☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana.☆ You can buy a latest issue from Toranoana. http://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.htmlhttp://www.toranoana.jp/mailorder/article/04/0030/58/73/040030587376.html ☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it!☆ Translated VeriFast tutorial appears in it! ☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94.☆ And we are calling for article on Comiket 94. ☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24.☆ The abstract deadline is 2018-06-24. ☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA:☆ Please read following about CFA: ☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke☆ https://wiki.haskell.org/Books#Joke
  • 21.
    License of photosLicenseof photosLicense of photosLicense of photosLicense of photos * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0 * Creative Commons BBB | Flickr https://www.flickr.com/photos/steren/2732488224/ Copyright: Steren Giannini / License: CC BY 2.0 * Smiling Camel | John Campbell | Flickr https://www.flickr.com/photos/104346167@N06/16765659629/ Copyright: John Campbell / License: Public domain * ritchie-thompson | 12 octobre 2011 : Décès de Dennis Ritchie… | Paille | Flickr https://www.flickr.com/photos/paille-fr/8070924277/ Copyright: Paille / License: CC BY-SA 2.0 * Spiral - BlakeWalk | Staircase in the Monument BlakeWalk, 7 … | Flickr https://www.flickr.com/photos/joeflintham/4196385813/ Copyright: Joe Flintham / License: CC BY-SA 2.0