Split the entry-point-generation phase into two parts #1394

smowton · 2017-09-15T15:12:41Z

The new generate_support_functions phase creates __CPROVER_start and __CPROVER_initialize and runs before lazy loading; the final phase will run after lazy loading, and is therefore used to patch up changes that require functions' bodies to have been loaded already.

In subsequent PRs, lazy loading will take advantage of this to read __CPROVER_start and use it to guide its work; CI-lazy-loading will use it to replace its current hackish logic to guess how globals and parameters will be initialised.

reuk

Virtual methods used to customize behavior should generally be private.

reuk · 2017-09-15T15:17:58Z

src/util/language.h

+  /// complete. Functions introduced here are visible to lazy loading and
+  /// can influence its decisions (e.g. picking the types of input parameters
+  /// and globals), whereas anything introduced during `final` cannot.
+  virtual bool generate_support_functions(


Should probably be private.

thk123

Seems reasonable - some suggestions if you agree with them. One thing to bare in mind is that the language appears to get thrown away and recreated (meaning the cmdline isn't parsed to the new instance). I'm going to create a PR that basically asserts that this is called before calling any of the methods. You might want to rebase this ontop of that and add the assert to generate_support_functions if it gets in first...

thk123 · 2017-09-18T09:27:24Z

src/ansi-c/ansi_c_language.cpp

@@ -117,6 +117,21 @@ bool ansi_c_languaget::parse(
  return result;
 }

+bool ansi_c_languaget::generate_support_functions(


Consider adding doxygen documentation for what supporting functions this generates (opaque functions, entry point)

I have this in languaget, is that enough or does it have to be duplicated in derived classes?

thk123 · 2017-09-18T10:15:54Z

src/goto-programs/initialize_goto_model.cpp

        {
-          msg.error() << "CONVERSION ERROR" << messaget::eom;
+          msg.error() << "ENTRY-POINT GENERATION ERROR" << messaget::eom;


Though most of generate_support_functions is related to the entry point, in might be worth calling this SUPPORT FUNCTION ERROR. Alternatively, could have the generate_support_functions throw structured exceptions for error states?

Structured exception will come, but let's do that separately.

mgudemann · 2017-09-18T10:30:17Z

src/java_bytecode/java_bytecode_language.cpp

-      max_nondet_array_length,
-      max_nondet_tree_depth,
-      get_pointer_type_selector());
+  return false;


Would you mind adding a comment to this?
Sometime later it might not be obvious why this cannot fail.

smowton · 2017-09-18T16:17:26Z

@thk123 suggest checking https://github.com/diffblue/security-scanner/pull/192/files for the latest version of this (will update that one once this passes)--

Changes since this version:

Removed generate_entry_point, replaced with a call to generate_support_functions (which must work correctly if run more than once; amended the Java version to match the Ansi-C version in this respect)
Only use rebuild_goto_start_function when the binaries provided one and we're directed to overwrite it; otherwise run the language_filest version which searches for a frontend that can provide an entry-point.
Move declaration of the --function option into language.h, which is I think its proper owner

thk123 · 2017-09-19T10:22:27Z

@smowton Sorry your last message confused me - which PR should I be reviewing, this on diffblue/security-scanner#192?

smowton · 2017-09-19T12:30:59Z

@thk123 please review diffblue/security-scanner#192 then I once that's in I will clone it into this one for submission to develop

peterschrammel · 2017-09-19T12:09:03Z

src/cbmc/cbmc_parse_options.cpp

@@ -629,20 +629,6 @@ int cbmc_parse_optionst::get_goto_program(
    // are already compiled
      return 6;

-    if(cmdline.isset("function"))


Why is this removed? What replaces this functionality?

This was a duplicate of functionality already in initialize_goto_model -- it was previously overwriting the start function twice.

peterschrammel · 2017-09-19T14:33:23Z

src/goto-programs/initialize_goto_model.cpp

        {
-          msg.error() << "CONVERSION ERROR" << messaget::eom;
+          msg.error() << "ENTRY-POINT GENERATION ERROR" << messaget::eom;


Structured exception will come, but let's do that separately.

peterschrammel · 2017-09-19T15:15:11Z

src/util/language_file.cpp

+{
+  std::set<std::string> languages;
+
+  for(file_mapt::iterator it=file_map.begin();


ranged for?

thk123 · 2017-09-20T12:22:21Z

I've reviewed 192 - once you've updated this PR to mirror could you ping me so I can create a TG bump since this will probably require some changes (I overhead you mention about the TG specific version of the language)

smowton · 2017-09-20T15:21:51Z

@thk123 @peterschrammel this has been updated; Peter your suggested C++11 loops have been added as a separate commit.

thk123 · 2017-09-22T08:53:05Z

I am creating a TG bump for this to verify it - but then can be merged

smowton · 2017-09-22T09:16:58Z

@thk123 please press the button when you're happy

thk123

For those out of ear shot of me and @smowton - there was a problem merging in to TG which @smowton is looking at at the moment.

The new generate_support_functions phase creates __CPROVER_start and __CPROVER_initialize and runs before lazy loading; the final phase will run *after* lazy loading, and is therefore used to patch up changes that require functions' bodies to have been loaded already.

smowton · 2017-10-04T10:41:38Z

Updated; created companion test-gen PR https://github.com/diffblue/test-gen/pull/1085 to verify this doesn't break it

thk123 · 2017-10-04T11:28:49Z

TG bump passes so have set approval.

@smowton

64d81f1 Merge remote-tracking branch 'upstream/develop' into pull-support-20171019 9e05177 Merge pull request diffblue#1474 from diffblue/jbmc e847137 Merge pull request diffblue#1493 from reuk/reuk/output-instruction-const-ref e74e1d8 Merge pull request diffblue#1489 from svorenova/tg-865 09431fd Adding unit tests for the signature/descripture mismatch 9a59fb9 Renamed DiffBlue -> Diffblue 185206c cbmc cleanup d542f7e cbmc: clean out java 320eeaf use jbmc in regression tests 4286b86 added jbmc executable b61cb56 Resolving signature/descriptor mismatch for methods 62675bb Merge pull request diffblue#1494 from thk123/tests/adding-generic-unit-tests 69d67ab Modified unit test to compile 9e68466 Replace loop_id parameter with const instructiont& dbff05b Replace iterator with const value_type& in output_instruction signature 5191170 Merge pull request diffblue#1485 from diffblue/std_expr_typing 210a2f4 Merge pull request diffblue#1491 from andreast271/cbmc_parse_options_fix fbc54ad guard against spurious pointers in taint analysis 5d6ebfd Revert "test isn't ready yet" de668e6 upgrade uses of deprecated member_exprt constructor 9da3f4f elaborate typing of std_expr expression classes 36ac8c9 Merge pull request diffblue#1482 from reuk/reuk/more-cmake-errors 47c2a51 Merge pull request diffblue#1447 from NathanJPhillips/bugfix/calculate_max_string_length-unit-test b2b4ca5 Align options string with help function and options parser dfb11c2 Merge pull request diffblue#1480 from diffblue/java-types-cleanup 11c8aba Fixed calculate_max_string_length unit test to work in CLion 8f4f2ec Merge pull request diffblue#1473 from reuk/reuk/simplify-expr-fixup 1ad89a0 Merge pull request diffblue#1475 from martin-cs/goto-analyzer-6-part1 3c5df61 Merge pull request diffblue#1486 from diffblue/revert-1413-smowton/feature/prepare_vsa_for_subclasses 24f9867 Simplify a broader range of java primitive types a18d7ec Revert "Value-set analysis: templatise and virtualise to facilitate customisation" 88acdfd Merge pull request diffblue#1355 from diffblue/cleanout-config-dependency 7df77e8 Add the overrides that clang wants. e96e09b Regression test for constant propagator merge bug ba55a2f constant propagator fix 350aa96 Addressing constant domain review comments by Daniel Poetzl. 5e9b2f4 Fail CMake build if make-generated files are found 32dcad8 test approx-const-fp-array-variable-invalid-cast-const-fp now more generous 12d45c6 Remove config dependency from CVC and DPLIB solvers 00d25a2 Pointers now come with a width f4bc0ec cleanup of java_types.h 08b2332 disable two-way propagation for now 76abe8a Fix constant propagator. c0ce9de Merge pull request diffblue#1413 from smowton/smowton/feature/prepare_vsa_for_subclasses 0bf2ce8 Merge pull request diffblue#1478 from smowton/smowton/fix/doxygen_fixes 0e0b501 Merge pull request diffblue#1463 from diffblue/mem-safety-check 04aff7c Remove residual doc template fc02354 Fix docstyle in dump_c.cpp a99b254 Indirect value_set_domaint -> value_sett operations via non-member functions f94807d Merge pull request diffblue#1428 from romainbrenguier/refactor/find_index 433fdbf Merge pull request diffblue#1472 from reuk/reuk/label-tests df6a0b3 Merge pull request diffblue#1406 from NlightNFotis/fotis/generics_support 123162b Merge pull request diffblue#1476 from diffblue/remove_ID_reference e669c12 Add unit tests for value-set-analysis customisation 9465771 Value-set analysis: ignore DEAD statements a2c1685 Templatize and virtualize value-set analysis 8ea9dcb Use std::find_if instead of expr visitor 5e1eede Merge pull request diffblue#1454 from martin-cs/feature/string-solver-performance c73b758 Merge pull request diffblue#1452 from diffblue/call-seq-fix d735cc5 Added support for concretising a generic and adding it into the symbol table. f131b34 Remove ID_reference as front-ends use ID_pointer+ID_C_reference d67bc87 Merge pull request diffblue#1471 from reuk/reuk/more-expr-cast-updates 5777062 check that memory for memcpy, 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Merge pull request diffblue#1442 from andreast271/compilation-NDEBUG-enable 869043a Merge pull request diffblue#1464 from smowton/smowton/fix/messaget_copy_and_assign_operators 9f53e90 Return pointer from expr_try_dynamic_cast 838c8a1 Fix testing-utils Makefile dependency 691e9fb Merge pull request diffblue#1449 from diffblue/havoc_object 78cd286 Fix messaget's copy-constructor and operator= 1614c2c Merge pull request diffblue#1462 from reuk/reuk/symbol-table-pointer a9ba0f9 Modify/add symbol table lookup and get_writeable d19e737 Merge pull request diffblue#1461 from thk123/bugfix/correcting-includes-in-new-unit-tests 3b69fe1 Missing source file from Makefile d70a08a Util files were moved into a util library 0681219 Merge branch 'develop' of github.com:diffblue/cbmc into develop 8891466 test isn't ready yet (cmake variant) b8057d3 Merge pull request diffblue#1448 from diffblue/goto-analalyzer-taint-test beac327 added __CPROVER_havoc(...) 8118efa test isn't ready yet 19858f9 Fix zeroing of arrays in value set analysis 12fd5fe Fix identifying arrays in value set analysis e618169 Merge pull request diffblue#1434 from svorenova/generics_support 68e4d6b Merge pull request diffblue#1457 from reuk/reuk/testing-utils 7c545c8 Switch (!a | b) for (a => b) to clarrify the intent of the code. 438ba8d Avoid generating redundant constraints by iterating over n^2/2 rather than n^2 pairs. aacd436 Add new testing-utils library b7aaad0 Removing signature parsing for local variables 8d54be1 Adding exception and tests for missing closing delimiter 608c6b6 Disabling part of the unit test for generic classes e140bb7 Updating the calls of lookup method to reflect the new return type cfb5212 Resolving name shadowing 97e1b9a Adding a warning and a commentary for unsupported generics, cleaning 4f305de Handling wild card generics with exception 8f527f8 Cleaning java files 3a1962f Turning back on regression tests a9dc64d Disabling part of the unit test for generic classes 04e55be Reverting method descriptor loading 2f7925d Adding unit test for recursive generic class 764c651 Enable compilation with NDEBUG defined e8c75ac Adding unit test for generic array de5c040 Adding tests for generic functions 85c1574 Applied use of utility function for loading a class file 8c7f4e4 Adding unit test for java class that inherits from a generic class 1dd221d Correct handling of the java generic class signature 33afe48 Adding unit tests for parsing wild card functions a2344f8 Extending the tests for the generic class 35cd160 Deal with generic methods 7320c46 Correcting a typo 2f7f695 Adding some useful debug info 79f743b Adding conversions for wild cards a60ead4 Correctly handle nested generic types b59c659 When dealing with generic arrays we should treat them like ref arrays too 1bd95c0 Classes that aren't generic but inherit from a generic type have a signature b2f57e8 Fixing handling the case of * 31faaa6 Revert "Revert "TG-374 Feature/java support generics"" 89341da Merge pull request diffblue#227 from diffblue/feature/adding_goto_statistics_to_goto-instrument 99eb662 Merge pull request diffblue#1450 from reuk/reuk/join-strings 9cf47a2 Updates requested in the PR. 4c4a267 Adding computation and save of goto program statistics. 7fcfd30 Merge pull request diffblue#1453 from diffblue/integer-addressees 639d1aa Merge pull request diffblue#1451 from diffblue/time-stopping 7e42fd2 preserve hidden flag for functions 0346f87 Add a join function for strings 2b17564 integer dereferences are now re-written to a custom expression 202b509 fix for call-sequences and call-graph f159bd5 more time stopping functionality ba96dde Merge pull request diffblue#1441 from reuk/reuk/expr-cast-for-code-types 086d6da moved taint-related tests for goto-analyzer into separate subdirectory c25e56f Respond to @NathanJPhillips' review feedback 3a4d364 Add checked_cast signatures 47a13c7 Remove unnecessary explicit typelists bc3d79b Use decay instead of remove_const(remove_reference) f9c1c70 Reorder and hide functions in expr_cast 800adbe Allow dynamic expr cast with code types 3ce8f11 Fix comparison in expr_cast.h 48b154a Bugfix: Exclude functions without bodies from GOTO statistics. 22a68fe Merge pull request diffblue#1444 from smowton/upstream/restrict-symbol-table d577d40 Merge pull request diffblue#1445 from smowton/smowton/feature/test-pl-interrupt b01ff65 Test.pl: exit if a test is interrupted 6794191 Improve symbol table documentation d320187 Linter fixes 53e1ca2 Made move constructor strong exception safe 9f4e933 Changed interface to symbol_tablet::insert e35f2fc Misc review requests a9d802b Made lookup return optional d1d502f Restricted interface of current symbol_tablet 478dc8a Merge pull request diffblue#1371 from NathanJPhillips/feature/unhide-error b790095 Merge pull request diffblue#1443 from tautschnig/fix-library-check ab2f3c3 Merge pull request diffblue#1438 from reuk/reuk/simplify-expr-improvement e865729 Updated comment 1def64c Added INVARIANT to symbol_tablet::remove 7798daa Add move insert to symbol_table b14a495 Tidy up symbol_tablet::move 6be5fd5 Merge pull request diffblue#1394 from smowton/smowton/feature/split_frontend_final_stage 14eecf6 library_check: use the build-system configured C compiler 3197045 library_check: rename _mm_*fence functions 6bc86e1 Merge pull request diffblue#222 from diffblue/feature/lexicographical_ordered_dump_of_functions_and_symbols a73ee46 Merge pull request diffblue#224 from diffblue/feature/file_utils_add_parsing_of_file_extension 421f4eb Merge pull request diffblue#226 from diffblue/feature/goto_statistics 1d87928 Add unit test for new behavior 9ea7414 Set up config in unit tests 0e2b13f Remove tautological typecasts 901d745 Switch to C++11 for-loops in language_file.cpp c7c8022 Add tests for mixed GOTO and C input 05f2f3c Split the entry-point-generation phase into two parts 268d196 Display error in catch(...) 6888dd2 Merge pull request diffblue#1436 from smowton/smowton/initialize-goto-model-opaque-stub-generation 6d9f029 Updates requested in the PR. 6f8ebe4 Updates requested in the PR. d4a04ac Added support of Windows platform to parsing file extension. 1884d67 Merge pull request diffblue#221 from diffblue/bugfix/INVARIANT_while(0)_to_while(false) 39a774f Introducing GOTO program statistics. 821ba1c Updates requested in the PR. 9266de0 Add parsing of file extension from file path-name. a9fa893 Merge pull request diffblue#1437 from smowton/smowton/fix-object-factory-globals 632ae4b Updates to recording_symbol_tablet 7545fc5 Merge pull request diffblue#1409 from thk123/bugfix/lang-args-missing 7fb835c Merge pull request diffblue#1433 from thk123/bugfix/doxy-script-documentation 56b0b26 Added lexicographical order to textual dump of functions and symbols. 58ef65b Object factory: initialise global symbols in place c41acce Set opaque stub generation in initialize-goto-model ef76441 Corrected error in the run_diff script 897aaf6 Merge pull request diffblue#1431 from thk123/feature/java-load-class-utility 79324b3 INVARIANT: while(0) -> while(false) 774bfdb Correcting type in the extendor class 46cbec6 Created utility function for loading a class file 8151e91 Merge pull request diffblue#1429 from janmroczkowski/janmroczkowski/unified_difft-remove-unused-identifier 3ceb89b Merge pull request diffblue#1390 from diffblue/fix_pointer_type 733f7b2 Added is_success and is_error helpers 5e7f3f7 Added implicit constructors to main_function_resultt to make code in get_main_symbol even briefer 3317a3a Tidied up code in get_main_symbol 47fe36f Changed main_function_resultt to use an enum instead of a collection of bools 8bb39ca Merge pull request diffblue#1427 from LAJW/feature/string-replace-single-character-strings a084a6a Reverting indentation in order to make the compiler silent. f948c2f Readability improvement fc7c615 Remove unused function identifier c063d01 Merge pull request diffblue#1259 from 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reuk/reuk/library-check-dep 27e1f2a Merge pull request diffblue#1423 from janmroczkowski/janmroczkowski/fresh_symbol-reset_temporary_counter 15af645 Merge pull request diffblue#1426 from reuk/reuk/download-project db9a0a7 Updates requested in the PR. d00c03d Introducing "enable_ccache" switch (default on) into our build system. 88c2f9c Use DownloadProject method for integrating sat libraries bc593c5 Add DownloadProject cmake script 0cc696b introduced ID_frontend_pointer cc63551 revert bits of a9806c0; the width of these pointers is done during the conversion phase 8fdb06f preserve location of pointer types de493ae Merge pull request diffblue#1412 from diffblue/java-object-factory-bug 7c3239b Merge pull request diffblue#1417 from diffblue/builtin_memset 368bb27 Merge pull request diffblue#1421 from jasigal/refactor/string-refinement-decision-procedure#TG-672 f079156 Merge pull request diffblue#205 from diffblue/feature/restrict-symbol-table 2462077 Misc review requests 98d0082 Made lookup return optional db69023 Restricted interface of current symbol_tablet ea74c6d Updated comment 909b557 Added INVARIANT to symbol_tablet::remove bd3ee6e Add move insert to symbol_table e67f326 TG-672 Added universal constraint counter-examples, assumed fix-point with no not contains constraints is equi-SAT 72a537a TG-672 Remove some unused concretizing code 95efc6f TG-672 Grouped string axioms together a65407e TG-672 Grouped index sets together 503c49d TG-672 Removed unneeded code (current index set display, extra invariant check) 45af45d TG-672 Uniformity in algorithm for treatement of universal and not contains constraints dd03003 TG-672 Fixed correctness issue in main loop of algorithm and added first UNSAT return dfa3ffd TG-672 Replaced `push_back` with `emplace_back` ac1b620 TG-672 Fixed `expr_cast` to be unambiguous and added `const` and `const` references throughout eb5726e Add reset_temporary_counter to fresh_symbol b5fe7e3 TG-672 Initial refactoring (renaming, code removal) 438d9f0 Merge pull request diffblue#1401 from janmroczkowski/janmroczkowski/java_bytecode_convert_classt-add_array_types-fix 18aacc0 Add full JSON-structured output for value-set analysis 0cdd9c6 Improve structure of JSON static-analysis dump 7df9f15 Add LVSA summary dump-to-JSON 83ee7d4 Only re-run library-check when ansi-c changes 2adc013 symex: fix address_of unions cd8d494 added __builtin_memset fcd470a only attempt to translate nondet sideeffects for Java code b9dfda9 Fix to java_bytecode_convert_classt.add_array_types 61c6489 Verify that language options have been initialized e3ad6c0 Update Big-Int with copy, move, swap git-subtree-dir: cbmc git-subtree-split: 64d81f1

smowton requested review from thk123, mgudemann, reuk and peterschrammel September 15, 2017 15:12

reuk suggested changes Sep 15, 2017

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smowton force-pushed the smowton/feature/split_frontend_final_stage branch from 55c4bc3 to 8b2f871 Compare September 20, 2017 15:18

smowton force-pushed the smowton/feature/split_frontend_final_stage branch from 8b2f871 to 72c865e Compare September 21, 2017 10:08

peterschrammel approved these changes Sep 21, 2017

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smowton added 3 commits October 4, 2017 10:37

Add tests for mixed GOTO and C input

c7c8022

Switch to C++11 for-loops in language_file.cpp

901d745

smowton force-pushed the smowton/feature/split_frontend_final_stage branch from 72c865e to 901d745 Compare October 4, 2017 09:50

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Split the entry-point-generation phase into two parts #1394

Split the entry-point-generation phase into two parts #1394

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Split the entry-point-generation phase into two parts #1394

Split the entry-point-generation phase into two parts #1394

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