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* Add -main option to specify entrypoint function in interpreter mode (#374)Xavier Leroy2020-10-301-18/+37
| | | | | | | When running unit tests with the CompCert reference interpreter, it's nice to be able to start execution at a given test function instead of having to write a main function. This PR adds a -main command-line option to give the name of the entry point function. The default is still main. Frama-C has a similar option. The function specified with -main is called with no arguments. If its return type is int, its return value is the exit status of the program. Otherwise, its return value is ignored and the program exits with status 0.
* Cosmetic: in OCaml code, write "open! Module" instead of "open !Module"Xavier Leroy2020-02-211-2/+2
| | | | | | "open!" is the form used in the examples in the OCaml manual. Based on a quick poll it seems to be the preferred form of the OCaml core dev team.
* Refine the type of function results in AST.signatureXavier Leroy2020-02-211-1/+1
| | | | | | | | | | Before it was "option typ". Now it is a proper inductive type that can also express small integer types (8/16-bit unsigned/signed integers). One benefit is that external functions get more precise types that control better their return values. As a consequence, the CompCert C type preservation property now holds unconditionally, without extra typing hypotheses on external functions.
* Compatibility with OCaml 4.08 (#302)Xavier Leroy2019-07-081-2/+2
| | | | | | | | | | | | | | | | * Do not use `Pervasives.xxx` qualified names Starting with OCaml 4.08, `Pervasives` is deprecated in favor of `Stdlib`, and uses of `Pervasives` cause fatal warnings. This commit uses unqualified names instead, as no ambiguity occurs. * Clarify "open" statements OCaml 4.08.0 has stricter warnings concerning open statements that shadow module names. Closes: #300
* Remove overriding open in Interp.Bernhard Schommer2017-02-031-11/+11
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* driver/Interp: updateXavier Leroy2016-10-241-8/+8
| | | | | Cherry-pick commit d1311e6 from trunk. Simplify convert_external_arg so that it works both in 32 and 64 bits.
* Allow %lf type specifier in printf.Bernhard Schommer2016-09-221-1/+1
| | | | | %lf is official part of the C99 standard. Bug 19877
* Fixed issue with emulation of printfBernhard Schommer2016-08-171-2/+4
| | | | | | The emulated printf in the interpreter did always return 0 instead of the numbers of bytes printed. Bug 19564
* Merge branch 'master' into cleanupBernhard Schommer2016-03-211-8/+8
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| * Print floating-point numbers with more digits in debug outputsXavier Leroy2016-03-151-2/+2
| | | | | | | | | | | | As suggested in GPR#84, use '%.15F' to force the printing of more significant digits. (The '%F' format previously used prints only 6.) This is enough to represent the FP number exactly most of the time (but not always). Once OCaml 4.03 is out and CompCert switches to this version of OCaml, we'll be able to use hexadecimal floats for printing.
* | Deactivate warning 27 and added back removed code.Bernhard Schommer2016-03-151-34/+34
| | | | | | | | | | | | The code was mostly there for documentation effort. So warning 27 is deactivated again. Bug 18349
* | Code cleanup.Bernhard Schommer2016-03-101-46/+43
|/ | | | | | Removed some unused variables, functions etc. and resolved some problems which occur if all warnings except 3,4,9 and 29 are active. Bug 18394.
* Updated PR by removing whitespaces. Bug 17450.Bernhard Schommer2015-10-201-6/+6
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* Use Coq strings instead of idents to name external and builtin functions.Xavier Leroy2015-10-111-3/+3
| | | | | | | | | | The AST.ident type represents source-level identifiers as unique positive numbers. However, the mapping identifiers <-> AST.ident differs between runs of CompCert on different source files. This is problematic when we need to produce or recognize external functions and builtin functions with fixed names, for example: * in $ARCH/Machregs.v to define the register conventions for builtin functions; * in the VST program logic from Princeton to treat thread primitives specially. So far, we used AST.ident_of_string to recover the ident associated with a string. However, this function is defined in OCaml and doesn't execute within Coq. This is a problem both for VST and for future executability of CompCert within Coq. This commit replaces "ident" by "string" in the arguments of EF_external, EF_builtin, EF_inline_asm, EF_annot, and EF_annot_val. This provides stable names for externals and builtins, as needed. For inline asm and annotations, it's a matter of taste, but using strings feels more natural. EF_debug keeps using idents, since some kinds of EF_debug annotations talk about program variables.
* Represent external worlds by a coinductive type rather than an inductive type.Xavier Leroy2015-06-071-1/+1
| | | | As noticed by R. Krebbers, an inductive type for external worlds implies that all sequences of program-world interactions are finite, which is not the case.
* Experiment: support a subset of GCC's extended asm statements.Xavier Leroy2015-04-171-1/+1
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* Interpreter produces more detailed trace, including name of semantic rules used.Xavier Leroy2015-02-081-95/+61
| | | | | | Cexec: record names of rules used in every reduction. Interp: print these rule names in -trace mode. Also: simplified the exploration in "-all" mode; give unique names to states. Csem: fix name of reduction rule "red_call".
* Represent struct and union types by name instead of by structure.Xavier Leroy2014-12-221-10/+12
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* Introduce symbol environments (type Senv.t) as a restricted view on global ↵Xavier Leroy2014-11-261-1/+1
| | | | environments (type Genv.t). Use symbol environments instead of global environments for external functions (module Events).
* Add Genv.public_symbol operation.Xavier Leroy2014-11-241-1/+21
| | | | | Restrict pointer event values to public global names. Update proofs accordingly. PowerPC and ARM need updating.
* Record public global definitions via field "prog_public" in AST.program.Xavier Leroy2014-11-241-1/+2
| | | | For the moment, this field is ignored.
* Revised translation of '&&' and '||' to Clight.Xavier Leroy2014-10-131-1/+1
| | | | | | | | | | | The previous translation (in SimplExpr) produced references to the same temporary variable with two different types (bool and int), which is not nice if we want to typecheck the generated Clight. The new translation avoids this and also gets rid of the double cast to bool then to int. The trick is to change Eparen (in CompCert C expressions) to take two types: the type to which the argument must be converted, and the type with which the resulting expression is seen.
* Merge of "newspilling" branch:xleroy2014-07-231-1/+1
| | | | | | | | | | | | | | | - Support single-precision floats as first-class values - Introduce chunks Many32, Many64 and types Tany32, Tany64 to support saving and restoring registers without knowing the exact types (int/single/float) of their contents, just their sizes. - Memory model: generalize the opaque encoding of pointers to apply to any value, not just pointers, if chunks Many32/Many64 are selected. - More properties of FP arithmetic proved. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2537 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Error messages were not displayed correctly if the main() function is ↵xleroy2014-03-211-5/+5
| | | | | | missing or has the wrong type. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2433 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Add option -Os to optimize for code size rather than for execution speed.xleroy2014-02-191-0/+1
| | | | | | | | Refactored compilation flags that affect the Coq part (module Compopts). Added support for C99 for loops with declarations. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2410 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Interp.ml: in the emulation of printf(), check formats against types of ↵xleroy2014-01-121-34/+51
| | | | | | | | | arguments. Test sizeof1: adapt to the fact that alignof(double) is either 4 or 8 depending on platform. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2406 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Better printing of integer literals: add U and LL suffixes when needed.xleroy2014-01-121-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2405 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Simpler, more robust emulation of calls to variadic functions:xleroy2013-12-281-8/+5
| | | | | | | | | | | | | | - C function types and Cminor signatures annotated by calling conventions. esp. vararg / not vararg - Cshmgen: generate correct code for function call where there are more arguments than listed in the function prototype. This is still undefined behavior according to the formal semantics, but correct code is generated. - C2C, */PrintAsm.ml: remove "printf$iif" hack. - powerpc/, checklink/: don't generate stubs for variadic functions. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2386 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised semantics of external functions, continued:xleroy2013-11-181-22/+36
| | | | | | | | | - Also axiomatize the semantics of inline asm - In Cexec, revised parameterization over do_external_function - In Interp.ml, matching changes + suppression of Interp_ext.ml git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2370 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Revised modeling of external functions and built-in functions: just axiomatizexleroy2013-11-171-20/+3
| | | | | | | them. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2369 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the "princeton" branch:xleroy2013-06-161-4/+4
| | | | | | | | | | | | | | - Define type "block" as "positive" instead of "Z". - Strengthen mem_unchanged_on so that the permissions are identical, instead of possibly increasing. - Move mem_unchanged_on from Events to Memory.Mem. - Define it in terms of mem_contents rather than in terms of Mem.load. - ExportClight: try to name temporaries introduced by SimplExpr - SimplExpr: avoid reusing temporaries between different functions, instead, thread a single generator through all functions. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2276 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* More precise and faster recovery of function name from function or fundef value.xleroy2013-06-081-2/+8
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2270 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the float32 branch: xleroy2013-05-191-0/+1
| | | | | | | | - added RTL type "Tsingle" - ABI-compatible passing of single-precision floats on ARM and x86 git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2260 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Fixes in PowerPC portxleroy2013-04-211-0/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2209 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Interp.ml: support printf of long longxleroy2013-04-201-4/+8
| | | | | | | test/regression: add test "int32"; update test "int64" git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2201 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Big merge of the newregalloc-int64 branch. Lots of changes in two directions:xleroy2013-04-201-0/+1
| | | | | | | | | 1- new register allocator (+ live range splitting, spilling&reloading, etc) based on a posteriori validation using the Rideau-Leroy algorithm 2- support for 64-bit integer arithmetic (type "long long"). git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2200 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Improving the performance of exhaustive exploration (mode -all):xleroy2013-03-091-18/+112
| | | | | | | | - Re-share states even at different times - Faster comparison between states, giving priority to the mem nextblock git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2138 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Typo in compare_mem causing merging of different states.xleroy2013-02-021-1/+1
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2108 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Ported to Coq 8.4pl1. Merge of branches/coq-8.4.xleroy2013-01-291-4/+2
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2101 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Better treatment of volatile accesses in the reference interpreter.xleroy2013-01-081-66/+83
| | | | | | | Suppressed option -randvol. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2092 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Update Cminor parser and printer so that the parser can parse the whole ↵xleroy2013-01-071-2/+2
| | | | | | Cminor language and can reparse the output of the printer. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2090 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Globalenvs: allocate one-byte block with permissions Nonempty for eachxleroy2012-11-121-23/+32
| | | | | | | | | | | function definition, so that comparisons between function pointers are correctly defined. AST, Globalenvs, and many other files: represent programs as a list of (function or variable) definitions instead of two lists, one for functions and the other for variables. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2067 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Make Clight independent of CompCert C.xleroy2012-10-081-0/+2
| | | | | | | Common parts are factored out in cfrontend/Ctypes.v and cfrontend/Cop.v git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2060 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* - Revised non-overflow constraints on memory injections so that xleroy2012-07-231-1/+1
| | | | | | | | | | injections compose (Values, Memdata, Memory) - Memory chunks: Mfloat64 now has alignment 8; introduced Mfloat64al32 that works like old Mfloat64 (i.e. has alignment 4); simplified handling of memcpy builtin accordingly. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1983 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Changelog: updatedxleroy2012-06-281-24/+1
| | | | | | | | | | driver/Interp.ml: clean up dead code lib/Integers.v: add shifted_or_is_add lib/Floats.v: add from_words_eq .depend: updated git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1940 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Use Flocq for floatsxleroy2012-06-281-5/+8
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1939 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the newmem branch:xleroy2012-05-211-0/+8
| | | | | | | | | | - Revised memory model with Max and Cur permissions, but without bounds - Constant propagation of 'const' globals - Function inlining at RTL level - (Unprovable) elimination of unreferenced static definitions git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1899 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Better printing of pointer values and of locations.xleroy2012-02-291-16/+38
| | | | git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1830 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Interp: help debug stuck expressionsxleroy2012-02-101-2/+48
| | | | | | | | StructReturn: was building an ill-typed Ecomma expression Cutil: export "ecast" git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1816 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
* Merge of the "volatile" branch:xleroy2012-02-041-16/+20
| | | | | | | | | | | | - native treatment of volatile accesses in CompCert C's semantics - translation of volatile accesses to built-ins in SimplExpr - native treatment of struct assignment and passing struct parameter by value - only passing struct result by value remains emulated - in cparser, remove emulations that are no longer used - added C99's type _Bool and used it to express || and && more efficiently. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1814 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
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