1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 module abstract_compiler
24 private import annotation
27 # Add compiling options
28 redef class ToolContext
30 var opt_output
= new OptionString("Output file", "-o", "--output")
32 var opt_dir
= new OptionString("Output directory", "--dir")
34 var opt_no_cc
= new OptionBool("Do not invoke C compiler", "--no-cc")
36 var opt_no_main
= new OptionBool("Do not generate main entry point", "--no-main")
38 var opt_cc_path
= new OptionArray("Set include path for C header files (may be used more than once)", "--cc-path")
40 var opt_make_flags
= new OptionString("Additional options to make", "--make-flags")
42 var opt_max_c_lines
= new OptionInt("Maximum number of lines in generated C files. Use 0 for unlimited", 10000, "--max-c-lines")
44 var opt_group_c_files
= new OptionBool("Group all generated code in the same series of files", "--group-c-files")
46 var opt_compile_dir
= new OptionString("Directory used to generate temporary files", "--compile-dir")
48 var opt_hardening
= new OptionBool("Generate contracts in the C code against bugs in the compiler", "--hardening")
49 # --no-check-covariance
50 var opt_no_check_covariance
= new OptionBool("Disable type tests of covariant parameters (dangerous)", "--no-check-covariance")
51 # --no-check-attr-isset
52 var opt_no_check_attr_isset
= new OptionBool("Disable isset tests before each attribute access (dangerous)", "--no-check-attr-isset")
54 var opt_no_check_assert
= new OptionBool("Disable the evaluation of explicit 'assert' and 'as' (dangerous)", "--no-check-assert")
56 var opt_no_check_autocast
= new OptionBool("Disable implicit casts on unsafe expression usage (dangerous)", "--no-check-autocast")
58 var opt_no_check_null
= new OptionBool("Disable tests of null receiver (dangerous)", "--no-check-null")
60 var opt_no_check_all
= new OptionBool("Disable all tests (dangerous)", "--no-check-all")
61 # --typing-test-metrics
62 var opt_typing_test_metrics
= new OptionBool("Enable static and dynamic count of all type tests", "--typing-test-metrics")
63 # --invocation-metrics
64 var opt_invocation_metrics
= new OptionBool("Enable static and dynamic count of all method invocations", "--invocation-metrics")
65 # --isset-checks-metrics
66 var opt_isset_checks_metrics
= new OptionBool("Enable static and dynamic count of isset checks before attributes access", "--isset-checks-metrics")
68 var opt_stacktrace
= new OptionString("Control the generation of stack traces", "--stacktrace")
70 var opt_no_gcc_directive
= new OptionArray("Disable a advanced gcc directives for optimization", "--no-gcc-directive")
72 var opt_release
= new OptionBool("Compile in release mode and finalize application", "--release")
77 self.option_context
.add_option
(self.opt_output
, self.opt_dir
, self.opt_no_cc
, self.opt_no_main
, self.opt_make_flags
, self.opt_compile_dir
, self.opt_hardening
)
78 self.option_context
.add_option
(self.opt_no_check_covariance
, self.opt_no_check_attr_isset
, self.opt_no_check_assert
, self.opt_no_check_autocast
, self.opt_no_check_null
, self.opt_no_check_all
)
79 self.option_context
.add_option
(self.opt_typing_test_metrics
, self.opt_invocation_metrics
, self.opt_isset_checks_metrics
)
80 self.option_context
.add_option
(self.opt_stacktrace
)
81 self.option_context
.add_option
(self.opt_no_gcc_directive
)
82 self.option_context
.add_option
(self.opt_release
)
83 self.option_context
.add_option
(self.opt_max_c_lines
, self.opt_group_c_files
)
86 redef fun process_options
(args
)
90 var st
= opt_stacktrace
.value
91 if st
== "none" or st
== "libunwind" or st
== "nitstack" then
93 else if st
== "auto" or st
== null then
95 opt_stacktrace
.value
= "nitstack"
97 print
"Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
101 if opt_output
.value
!= null and opt_dir
.value
!= null then
102 print
"Error: cannot use both --dir and --output"
106 if opt_no_check_all
.value
then
107 opt_no_check_covariance
.value
= true
108 opt_no_check_attr_isset
.value
= true
109 opt_no_check_assert
.value
= true
110 opt_no_check_autocast
.value
= true
111 opt_no_check_null
.value
= true
116 redef class ModelBuilder
117 # The compilation directory
118 var compile_dir
: String
120 # Simple indirection to `Toolchain::write_and_make`
121 protected fun write_and_make
(compiler
: AbstractCompiler)
123 var platform
= compiler
.mainmodule
.target_platform
125 if platform
== null then
126 toolchain
= new MakefileToolchain(toolcontext
)
128 toolchain
= platform
.toolchain
(toolcontext
)
130 compile_dir
= toolchain
.compile_dir
131 toolchain
.write_and_make compiler
136 fun toolchain
(toolcontext
: ToolContext): Toolchain is abstract
140 var toolcontext
: ToolContext
142 fun compile_dir
: String
144 var compile_dir
= toolcontext
.opt_compile_dir
.value
145 if compile_dir
== null then compile_dir
= ".nit_compile"
149 fun write_and_make
(compiler
: AbstractCompiler) is abstract
152 class MakefileToolchain
154 # The list of directories to search for included C headers (-I for C compilers)
155 # The list is initially set with :
156 # * the toolcontext --cc-path option
157 # * the NIT_CC_PATH environment variable
158 # * `toolcontext.nit_dir`
159 # Path can be added (or removed) by the client
160 var cc_paths
= new Array[String]
162 # The clib directory of Nit
163 # Used to found some common runtime
164 var clib
: String is noinit
166 protected fun gather_cc_paths
168 # Look for the the Nit clib path
169 var path_env
= toolcontext
.nit_dir
170 if path_env
!= null then
171 var libname
= "{path_env}/clib"
172 if not libname
.file_exists
then
173 toolcontext
.fatal_error
(null, "Cannot determine the nit clib path. define envvar NIT_DIR.")
178 # Add user defined cc_paths
179 cc_paths
.append
(toolcontext
.opt_cc_path
.value
)
181 path_env
= "NIT_CC_PATH".environ
182 if not path_env
.is_empty
then
183 cc_paths
.append
(path_env
.split_with
(':'))
187 redef fun write_and_make
(compiler
)
191 var compile_dir
= compile_dir
193 # Generate the .h and .c files
194 # A single C file regroups many compiled rumtime functions
195 # Note that we do not try to be clever an a small change in a Nit source file may change the content of all the generated .c files
197 self.toolcontext
.info
("*** WRITING C ***", 1)
201 var cfiles
= new Array[String]
202 write_files
(compiler
, compile_dir
, cfiles
)
204 # Generate the Makefile
206 write_makefile
(compiler
, compile_dir
, cfiles
)
209 self.toolcontext
.info
("*** END WRITING C: {time1-time0} ***", 2)
211 # Execute the Makefile
213 if self.toolcontext
.opt_no_cc
.value
then return
216 self.toolcontext
.info
("*** COMPILING C ***", 1)
218 compile_c_code
(compiler
, compile_dir
)
221 self.toolcontext
.info
("*** END COMPILING C: {time1-time0} ***", 2)
224 fun write_files
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
226 var platform
= compiler
.mainmodule
.target_platform
227 if self.toolcontext
.opt_stacktrace
.value
== "nitstack" and (platform
== null or platform
.supports_libunwind
) then compiler
.build_c_to_nit_bindings
228 var cc_opt_with_libgc
= "-DWITH_LIBGC `pkg-config --cflags bdw-gc`"
229 if platform
!= null and not platform
.supports_libgc
then cc_opt_with_libgc
= ""
231 # Add gc_choser.h to aditionnal bodies
232 var gc_chooser
= new ExternCFile("gc_chooser.c", cc_opt_with_libgc
)
233 compiler
.extern_bodies
.add
(gc_chooser
)
234 compiler
.files_to_copy
.add
"{clib}/gc_chooser.c"
235 compiler
.files_to_copy
.add
"{clib}/gc_chooser.h"
238 for m
in compiler
.mainmodule
.in_importation
.greaters
do
239 compiler
.finalize_ffi_for_module
(m
)
242 # Copy original .[ch] files to compile_dir
243 for src
in compiler
.files_to_copy
do
244 var basename
= src
.basename
("")
245 var dst
= "{compile_dir}/{basename}"
249 var hfilename
= compiler
.header
.file
.name
+ ".h"
250 var hfilepath
= "{compile_dir}/{hfilename}"
251 var h
= new OFStream.open
(hfilepath
)
252 for l
in compiler
.header
.decl_lines
do
256 for l
in compiler
.header
.lines
do
262 var max_c_lines
= toolcontext
.opt_max_c_lines
.value
263 for f
in compiler
.files
do
266 var file
: nullable OFStream = null
267 for vis
in f
.writers
do
268 if vis
== compiler
.header
then continue
269 var total_lines
= vis
.lines
.length
+ vis
.decl_lines
.length
270 if total_lines
== 0 then continue
272 if file
== null or (count
> max_c_lines
and max_c_lines
> 0) then
274 if file
!= null then file
.close
275 var cfilename
= "{f.name}.{i}.c"
276 var cfilepath
= "{compile_dir}/{cfilename}"
277 self.toolcontext
.info
("new C source files to compile: {cfilepath}", 3)
278 cfiles
.add
(cfilename
)
279 file
= new OFStream.open
(cfilepath
)
280 file
.write
"#include \"{f.name}.0.h\
"\n"
283 for l
in vis
.decl_lines
do
287 for l
in vis
.lines
do
292 if file
== null then continue
295 var cfilename
= "{f.name}.0.h"
296 var cfilepath
= "{compile_dir}/{cfilename}"
297 var hfile
: nullable OFStream = null
298 hfile
= new OFStream.open
(cfilepath
)
299 hfile
.write
"#include \"{hfilename}\
"\n"
300 for key
in f
.required_declarations
do
301 if not compiler
.provided_declarations
.has_key
(key
) then
302 var node
= compiler
.requirers_of_declarations
.get_or_null
(key
)
304 node
.debug
"No provided declaration for {key}"
306 print
"No provided declaration for {key}"
310 hfile
.write compiler
.provided_declarations
[key
]
316 self.toolcontext
.info
("Total C source files to compile: {cfiles.length}", 2)
319 fun makefile_name
(mainmodule
: MModule): String do return "{mainmodule.name}.mk"
321 fun default_outname
(mainmodule
: MModule): String
323 # Search a non fictive module
324 var res
= mainmodule
.name
325 while mainmodule
.is_fictive
do
326 mainmodule
= mainmodule
.in_importation
.direct_greaters
.first
327 res
= mainmodule
.name
332 # Combine options and platform informations to get the final path of the outfile
333 fun outfile
(mainmodule
: MModule): String
335 var res
= self.toolcontext
.opt_output
.value
336 if res
!= null then return res
337 res
= default_outname
(mainmodule
)
338 var dir
= self.toolcontext
.opt_dir
.value
339 if dir
!= null then return dir
.join_path
(res
)
343 fun write_makefile
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
345 var mainmodule
= compiler
.mainmodule
346 var platform
= compiler
.mainmodule
.target_platform
348 var outname
= outfile
(mainmodule
)
350 var outpath
= compile_dir
.relpath
(outname
)
351 var makename
= makefile_name
(mainmodule
)
352 var makepath
= "{compile_dir}/{makename}"
353 var makefile
= new OFStream.open
(makepath
)
357 cc_includes
+= " -I \"" + p + "\
""
360 var linker_options
= new HashSet[String]
361 for m
in mainmodule
.in_importation
.greaters
do
362 var libs
= m
.collect_linker_libs
363 if libs
!= null then linker_options
.add_all
(libs
)
366 makefile
.write
("CC = ccache cc\nCXX = ccache c++\nCFLAGS = -g -O2 -Wno-unused-value -Wno-switch\nCINCL = {cc_includes}\nLDFLAGS ?= \nLDLIBS ?= -lm `pkg-config --libs bdw-gc` {linker_options.join(" ")}\n\n")
368 var ost
= toolcontext
.opt_stacktrace
.value
369 if (ost
== "libunwind" or ost
== "nitstack") and (platform
== null or platform
.supports_libunwind
) then makefile
.write
("NEED_LIBUNWIND := YesPlease\n")
371 # Dynamic adaptations
372 # While `platform` enable complex toolchains, they are statically applied
373 # For a dynamic adaptsation of the compilation, the generated Makefile should check and adapt things itself
375 # Check and adapt the targeted system
376 makefile
.write
("uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')\n")
377 makefile
.write
("ifeq ($(uname_S),Darwin)\n")
378 # remove -lunwind since it is already included on macosx
379 makefile
.write
("\tNEED_LIBUNWIND :=\n")
380 makefile
.write
("endif\n\n")
382 # Check and adapt for the compiler used
383 # clang need an additionnal `-Qunused-arguments`
384 makefile
.write
("clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')\nifeq ($(clang_check), 0)\n\tCFLAGS += -Qunused-arguments\nendif\n")
386 makefile
.write
("ifdef NEED_LIBUNWIND\n\tLDLIBS += -lunwind\nendif\n")
388 makefile
.write
("all: {outpath}\n\n")
390 var ofiles
= new Array[String]
391 var dep_rules
= new Array[String]
392 # Compile each generated file
394 var o
= f
.strip_extension
(".c") + ".o"
395 makefile
.write
("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -c -o {o} {f}\n\n")
400 var java_files
= new Array[ExternFile]
402 var pkgconfigs
= new Array[String]
403 for f
in compiler
.extern_bodies
do
404 pkgconfigs
.add_all f
.pkgconfigs
406 # Compile each required extern body into a specific .o
407 for f
in compiler
.extern_bodies
do
408 var o
= f
.makefile_rule_name
409 var ff
= f
.filename
.basename
("")
410 makefile
.write
("{o}: {ff}\n")
411 makefile
.write
("\t{f.makefile_rule_content}\n\n")
412 dep_rules
.add
(f
.makefile_rule_name
)
414 if f
.compiles_to_o_file
then ofiles
.add
(o
)
415 if f
.add_to_jar
then java_files
.add
(f
)
418 if not java_files
.is_empty
then
419 var jar_file
= "{outpath}.jar"
421 var class_files_array
= new Array[String]
422 for f
in java_files
do class_files_array
.add
(f
.makefile_rule_name
)
423 var class_files
= class_files_array
.join
(" ")
425 makefile
.write
("{jar_file}: {class_files}\n")
426 makefile
.write
("\tjar cf {jar_file} {class_files}\n\n")
427 dep_rules
.add jar_file
432 if not pkgconfigs
.is_empty
then
433 pkg
= "`pkg-config --libs {pkgconfigs.join(" ")}`"
435 makefile
.write
("{outpath}: {dep_rules.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath} {ofiles.join(" ")} $(LDLIBS) {pkg}\n\n")
437 makefile
.write
("clean:\n\trm {ofiles.join(" ")} 2>/dev/null\n\n")
439 self.toolcontext
.info
("Generated makefile: {makepath}", 2)
441 makepath
.file_copy_to
"{compile_dir}/Makefile"
444 fun compile_c_code
(compiler
: AbstractCompiler, compile_dir
: String)
446 var makename
= makefile_name
(compiler
.mainmodule
)
448 var makeflags
= self.toolcontext
.opt_make_flags
.value
449 if makeflags
== null then makeflags
= ""
450 self.toolcontext
.info
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags}", 2)
453 if self.toolcontext
.verbose_level
>= 3 then
454 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1")
456 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1 >/dev/null")
459 toolcontext
.error
(null, "make failed! Error code: {res}.")
464 # Singleton that store the knowledge about the compilation process
465 abstract class AbstractCompiler
466 type VISITOR: AbstractCompilerVisitor
468 # Table corresponding c_names to nit names (methods)
469 var names
= new HashMap[String, String]
471 # The main module of the program currently compiled
472 # Is assigned during the separate compilation
473 var mainmodule
: MModule is writable
475 # The real main module of the program
476 var realmainmodule
: MModule
478 # The modelbuilder used to know the model and the AST
479 var modelbuilder
: ModelBuilder is protected writable
481 # Is hardening asked? (see --hardening)
482 fun hardening
: Bool do return self.modelbuilder
.toolcontext
.opt_hardening
.value
484 init(mainmodule
: MModule, modelbuilder
: ModelBuilder)
486 self.mainmodule
= mainmodule
487 self.realmainmodule
= mainmodule
488 self.modelbuilder
= modelbuilder
491 # Force the creation of a new file
492 # The point is to avoid contamination between must-be-compiled-separately files
493 fun new_file
(name
: String): CodeFile
495 if modelbuilder
.toolcontext
.opt_group_c_files
.value
then
496 if self.files
.is_empty
then
497 var f
= new CodeFile(mainmodule
.name
)
500 return self.files
.first
502 var f
= new CodeFile(name
)
507 # The list of all associated files
508 # Used to generate .c files
509 var files
= new List[CodeFile]
511 # Initialize a visitor specific for a compiler engine
512 fun new_visitor
: VISITOR is abstract
514 # Where global declaration are stored (the main .h)
515 var header
: CodeWriter is writable
517 # Provide a declaration that can be requested (before or latter) by a visitor
518 fun provide_declaration
(key
: String, s
: String)
520 if self.provided_declarations
.has_key
(key
) then
521 assert self.provided_declarations
[key
] == s
523 self.provided_declarations
[key
] = s
526 private var provided_declarations
= new HashMap[String, String]
528 private var requirers_of_declarations
= new HashMap[String, ANode]
530 # Builds the .c and .h files to be used when generating a Stack Trace
531 # Binds the generated C function names to Nit function names
532 fun build_c_to_nit_bindings
534 var compile_dir
= modelbuilder
.compile_dir
536 var stream
= new OFStream.open
("{compile_dir}/c_functions_hash.c")
537 stream
.write
("#include <string.h>\n")
538 stream
.write
("#include <stdlib.h>\n")
539 stream
.write
("#include \"c_functions_hash
.h\
"\n")
540 stream
.write
("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
541 stream
.write
("const char* get_nit_name(register const char* procproc, register unsigned int len)\{\n")
542 stream
.write
("char* procname = malloc(len+1);")
543 stream
.write
("memcpy(procname, procproc, len);")
544 stream
.write
("procname[len] = '\\0';")
545 stream
.write
("static const C_Nit_Names map[{names.length}] = \{\n")
546 for i
in names
.keys
do
549 stream.write("\
",\"")
550 stream.write(names[i])
551 stream.write("\
"\},\n")
553 stream
.write
("\};\n")
554 stream
.write
("int i;")
555 stream
.write
("for(i = 0; i < {names.length}; i++)\{")
556 stream
.write
("if(strcmp(procname,map[i].name) == 0)\{")
557 stream
.write
("free(procname);")
558 stream
.write
("return map[i].nit_name;")
561 stream
.write
("free(procname);")
562 stream
.write
("return NULL;")
566 stream
= new OFStream.open
("{compile_dir}/c_functions_hash.h")
567 stream
.write
("const char* get_nit_name(register const char* procname, register unsigned int len);\n")
570 extern_bodies
.add
(new ExternCFile("{compile_dir}/c_functions_hash.c", ""))
574 # This method call compile_header_strucs method that has to be refined
575 fun compile_header
do
576 self.header
.add_decl
("#include <stdlib.h>")
577 self.header
.add_decl
("#include <stdio.h>")
578 self.header
.add_decl
("#include <string.h>")
579 self.header
.add_decl
("#include \"gc_chooser
.h\
"")
580 self.header
.add_decl
("#ifdef ANDROID")
581 self.header
.add_decl
(" #include <android/log.h>")
582 self.header
.add_decl
(" #define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\
", __VA_ARGS__)")
583 self.header
.add_decl
("#else")
584 self.header
.add_decl
(" #define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)")
585 self.header
.add_decl
("#endif")
587 compile_header_structs
588 compile_nitni_structs
590 var gccd_disable
= modelbuilder
.toolcontext
.opt_no_gcc_directive
.value
591 if gccd_disable
.has
("noreturn") or gccd_disable
.has
("all") then
592 # Signal handler function prototype
593 self.header
.add_decl
("void show_backtrace(int);")
595 self.header
.add_decl
("void show_backtrace(int) __attribute__ ((noreturn));")
598 if gccd_disable
.has
("likely") or gccd_disable
.has
("all") then
599 self.header
.add_decl
("#define likely(x) (x)")
600 self.header
.add_decl
("#define unlikely(x) (x)")
601 else if gccd_disable
.has
("correct-likely") then
602 # invert the `likely` definition
603 # Used by masochists to bench the worst case
604 self.header
.add_decl
("#define likely(x) __builtin_expect((x),0)")
605 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),1)")
607 self.header
.add_decl
("#define likely(x) __builtin_expect((x),1)")
608 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),0)")
611 # Global variable used by intern methods
612 self.header
.add_decl
("extern int glob_argc;")
613 self.header
.add_decl
("extern char **glob_argv;")
614 self.header
.add_decl
("extern val *glob_sys;")
617 # Declaration of structures for live Nit types
618 protected fun compile_header_structs
is abstract
620 # Declaration of structures for nitni undelying the FFI
621 protected fun compile_nitni_structs
623 self.header
.add_decl
"""
624 /* Native reference to Nit objects */
625 /* This structure is used to represent every Nit type in extern methods and custom C code. */
627 struct nitni_ref *next,
628 *prev; /* adjacent global references in global list */
629 int count; /* number of time this global reference has been marked */
632 /* List of global references from C code to Nit objects */
633 /* Instanciated empty at init of Nit system and filled explicitly by user in C code */
634 struct nitni_global_ref_list_t {
635 struct nitni_ref *head, *tail;
637 extern struct nitni_global_ref_list_t *nitni_global_ref_list;
639 /* Initializer of global reference list */
640 extern void nitni_global_ref_list_init();
642 /* Intern function to add a global reference to the list */
643 extern void nitni_global_ref_add( struct nitni_ref *ref );
645 /* Intern function to remove a global reference from the list */
646 extern void nitni_global_ref_remove( struct nitni_ref *ref );
648 /* Increase count on an existing global reference */
649 extern void nitni_global_ref_incr( struct nitni_ref *ref );
651 /* Decrease count on an existing global reference */
652 extern void nitni_global_ref_decr( struct nitni_ref *ref );
656 fun compile_finalizer_function
658 var finalizable_type
= mainmodule
.finalizable_type
659 if finalizable_type
== null then return
661 var finalize_meth
= mainmodule
.try_get_primitive_method
("finalize", finalizable_type
.mclass
)
663 if finalize_meth
== null then
664 modelbuilder
.toolcontext
.error
(null, "The `Finalizable` class doesn't declare the `finalize` method.")
668 var v
= self.new_visitor
669 v
.add_decl
"void gc_finalize (void *obj, void *client_data) \{"
670 var recv
= v
.new_expr
("obj", finalizable_type
)
671 v
.send
(finalize_meth
, [recv
])
675 # Generate the main C function.
679 # * allocate the Sys object if it exists
680 # * call init if is exists
681 # * call main if it exists
682 fun compile_main_function
684 var v
= self.new_visitor
685 v
.add_decl
("#include <signal.h>")
686 var ost
= modelbuilder
.toolcontext
.opt_stacktrace
.value
687 var platform
= mainmodule
.target_platform
689 if platform
!= null and not platform
.supports_libunwind
then ost
= "none"
691 var no_main
= (platform
!= null and platform
.no_main
) or modelbuilder
.toolcontext
.opt_no_main
.value
693 if ost
== "nitstack" or ost
== "libunwind" then
694 v
.add_decl
("#define UNW_LOCAL_ONLY")
695 v
.add_decl
("#include <libunwind.h>")
696 if ost
== "nitstack" then
697 v
.add_decl
("#include \"c_functions_hash
.h\
"")
700 v
.add_decl
("int glob_argc;")
701 v
.add_decl
("char **glob_argv;")
702 v
.add_decl
("val *glob_sys;")
704 if self.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
705 for tag
in count_type_test_tags
do
706 v
.add_decl
("long count_type_test_resolved_{tag};")
707 v
.add_decl
("long count_type_test_unresolved_{tag};")
708 v
.add_decl
("long count_type_test_skipped_{tag};")
709 v
.compiler
.header
.add_decl
("extern long count_type_test_resolved_{tag};")
710 v
.compiler
.header
.add_decl
("extern long count_type_test_unresolved_{tag};")
711 v
.compiler
.header
.add_decl
("extern long count_type_test_skipped_{tag};")
715 if self.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then
716 v
.add_decl
("long count_invoke_by_tables;")
717 v
.add_decl
("long count_invoke_by_direct;")
718 v
.add_decl
("long count_invoke_by_inline;")
719 v
.compiler
.header
.add_decl
("extern long count_invoke_by_tables;")
720 v
.compiler
.header
.add_decl
("extern long count_invoke_by_direct;")
721 v
.compiler
.header
.add_decl
("extern long count_invoke_by_inline;")
724 if self.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
725 v
.add_decl
("long count_attr_reads = 0;")
726 v
.add_decl
("long count_isset_checks = 0;")
727 v
.compiler
.header
.add_decl
("extern long count_attr_reads;")
728 v
.compiler
.header
.add_decl
("extern long count_isset_checks;")
731 v
.add_decl
("void sig_handler(int signo)\{")
732 v
.add_decl
("PRINT_ERROR(\"Caught signal
: %s\\n\
", strsignal(signo));")
733 v
.add_decl
("show_backtrace(signo);")
736 v
.add_decl
("void show_backtrace (int signo) \{")
737 if ost
== "nitstack" or ost
== "libunwind" then
738 v
.add_decl
("char* opt = getenv(\"NIT_NO_STACK\
");")
739 v
.add_decl
("unw_cursor_t cursor;")
740 v
.add_decl
("if(opt==NULL)\{")
741 v
.add_decl
("unw_context_t uc;")
742 v
.add_decl
("unw_word_t ip;")
743 v
.add_decl
("char* procname = malloc(sizeof(char) * 100);")
744 v
.add_decl
("unw_getcontext(&uc);")
745 v
.add_decl
("unw_init_local(&cursor, &uc);")
746 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
747 v
.add_decl
("PRINT_ERROR(\"-- Stack Trace ------------------------------\\n\
");")
748 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
749 v
.add_decl
("while (unw_step(&cursor) > 0) \{")
750 v
.add_decl
(" unw_get_proc_name(&cursor, procname, 100, &ip);")
751 if ost
== "nitstack" then
752 v
.add_decl
(" const char* recv = get_nit_name(procname, strlen(procname));")
753 v
.add_decl
(" if (recv != NULL)\{")
754 v
.add_decl
(" PRINT_ERROR(\"` %s\\n\", recv);")
755 v.add_decl(" \}else\{")
756 v.add_decl(" PRINT_ERROR(\"` %s\\n\
", procname);")
759 v
.add_decl
(" PRINT_ERROR(\"` %s \\n\",procname);")
762 v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
763 v.add_decl("free(procname);")
766 v.add_decl("exit(signo);")
770 v.add_decl("int nit_main(int argc, char** argv) \{")
772 v.add_decl("int main(int argc, char** argv) \{")
775 v.add("signal(SIGABRT, sig_handler);")
776 v.add("signal(SIGFPE, sig_handler);")
777 v.add("signal(SIGILL, sig_handler);")
778 v.add("signal(SIGINT, sig_handler);")
779 v.add("signal(SIGTERM, sig_handler);")
780 v.add("signal(SIGSEGV, sig_handler);")
781 v.add("signal(SIGPIPE, sig_handler);")
783 v.add("glob_argc = argc; glob_argv = argv;")
784 v.add("initialize_gc_option();")
786 v.add "initialize_nitni_global_refs();"
788 var main_type = mainmodule.sys_type
789 if main_type != null then
790 var mainmodule = v.compiler.mainmodule
791 var glob_sys = v.init_instance(main_type)
792 v.add("glob_sys = {glob_sys};")
793 var main_init = mainmodule.try_get_primitive_method("init", main_type.mclass)
794 if main_init != null then
795 v.send(main_init, [glob_sys])
797 var main_method = mainmodule.try_get_primitive_method("run", main_type.mclass) or else
798 mainmodule.try_get_primitive_method("main", main_type.mclass)
799 if main_method != null then
800 v.send(main_method, [glob_sys])
804 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
805 v.add_decl("long count_type_test_resolved_total = 0;")
806 v.add_decl("long count_type_test_unresolved_total = 0;")
807 v.add_decl("long count_type_test_skipped_total = 0;")
808 v.add_decl("long count_type_test_total_total = 0;")
809 for tag in count_type_test_tags do
810 v.add_decl("long count_type_test_total_{tag};")
811 v.add("count_type_test_total_{tag} = count_type_test_resolved_{tag} + count_type_test_unresolved_{tag} + count_type_test_skipped_{tag};")
812 v.add("count_type_test_resolved_total += count_type_test_resolved_{tag};")
813 v.add("count_type_test_unresolved_total += count_type_test_unresolved_{tag};")
814 v.add("count_type_test_skipped_total += count_type_test_skipped_{tag};")
815 v.add("count_type_test_total_total += count_type_test_total_{tag};")
817 v.add("printf(\"# dynamic count_type_test: total %l\\n\");")
818 v.add("printf(\"\\tresolved\\tunresolved\\tskipped\\ttotal\\n\");")
819 var tags = count_type_test_tags.to_a
822 v.add("printf(\"{tag}\");")
823 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_resolved_{tag}, 100.0*count_type_test_resolved_{tag}/count_type_test_total_total);")
824 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_unresolved_{tag}, 100.0*count_type_test_unresolved_{tag}/count_type_test_total_total);")
825 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_skipped_{tag}, 100.0*count_type_test_skipped_{tag}/count_type_test_total_total);")
826 v.add("printf(\"\\t%ld (%.2f%%)\\n\", count_type_test_total_{tag}, 100.0*count_type_test_total_{tag}/count_type_test_total_total);")
830 if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
831 v.add_decl("long count_invoke_total;")
832 v.add("count_invoke_total = count_invoke_by_tables + count_invoke_by_direct + count_invoke_by_inline;")
833 v.add("printf(\"# dynamic count_invocation: total %ld\\n\", count_invoke_total);")
834 v.add("printf(\"by table: %ld (%.2f%%)\\n\", count_invoke_by_tables, 100.0*count_invoke_by_tables/count_invoke_total);")
835 v.add("printf(\"direct: %ld (%.2f%%)\\n\", count_invoke_by_direct, 100.0*count_invoke_by_direct/count_invoke_total);")
836 v.add("printf(\"inlined: %ld (%.2f%%)\\n\", count_invoke_by_inline, 100.0*count_invoke_by_inline/count_invoke_total);")
839 if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
840 v.add("printf(\"# dynamic attribute reads: %ld\\n\", count_attr_reads);")
841 v.add("printf(\"# dynamic isset checks: %ld\\n\", count_isset_checks);")
848 # Copile all C functions related to the [incr|decr]_ref features of the FFI
849 fun compile_nitni_global_ref_functions
851 var v = self.new_visitor
853 struct nitni_global_ref_list_t *nitni_global_ref_list;
854 void initialize_nitni_global_refs() {
855 nitni_global_ref_list = (struct nitni_global_ref_list_t*)nit_alloc(sizeof(struct nitni_global_ref_list_t));
856 nitni_global_ref_list->head = NULL;
857 nitni_global_ref_list->tail = NULL;
860 void nitni_global_ref_add( struct nitni_ref *ref ) {
861 if ( nitni_global_ref_list->head == NULL ) {
862 nitni_global_ref_list->head = ref;
865 nitni_global_ref_list->tail->next = ref;
866 ref->prev = nitni_global_ref_list->tail;
868 nitni_global_ref_list->tail = ref;
873 void nitni_global_ref_remove( struct nitni_ref *ref ) {
874 if ( ref->prev == NULL ) {
875 nitni_global_ref_list->head = ref->next;
877 ref->prev->next = ref->next;
880 if ( ref->next == NULL ) {
881 nitni_global_ref_list->tail = ref->prev;
883 ref->next->prev = ref->prev;
887 extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
888 if ( ref->count == 0 ) /* not registered */
891 nitni_global_ref_add( ref );
897 extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
898 if ( ref->count == 1 ) /* was last reference */
900 /* remove from list */
901 nitni_global_ref_remove( ref );
909 # List of additional files required to compile (FFI)
910 var extern_bodies = new Array[ExternFile]
912 # List of source files to copy over to the compile dir
913 var files_to_copy = new Array[String]
915 # This is used to avoid adding an extern file more than once
916 private var seen_extern = new ArraySet[String]
918 # Generate code that initialize the attributes on a new instance
919 fun generate_init_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
921 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
922 self.mainmodule.linearize_mclassdefs(cds)
924 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
925 var n = self.modelbuilder.mclassdef2nclassdef[cd]
926 for npropdef in n.n_propdefs do
927 if npropdef isa AAttrPropdef then
928 npropdef.init_expr(v, recv)
934 # Generate code that check if an attribute is correctly initialized
935 fun generate_check_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
937 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
938 self.mainmodule.linearize_mclassdefs(cds)
940 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
941 var n = self.modelbuilder.mclassdef2nclassdef[cd]
942 for npropdef in n.n_propdefs do
943 if npropdef isa AAttrPropdef then
944 npropdef.check_expr(v, recv)
952 var count_type_test_tags: Array[String] = ["isa", "as", "auto", "covariance", "erasure"]
953 var count_type_test_resolved: HashMap[String, Int] = init_count_type_test_tags
954 var count_type_test_unresolved: HashMap[String, Int] = init_count_type_test_tags
955 var count_type_test_skipped: HashMap[String, Int] = init_count_type_test_tags
957 protected fun init_count_type_test_tags: HashMap[String, Int]
959 var res = new HashMap[String, Int]
960 for tag in count_type_test_tags do
966 # Display stats about compilation process
970 # * type tests against resolved types (`x
isa Collection[Animal]`)
971 # * type tests against unresolved types (`x
isa Collection[E
]`)
972 # * type tests skipped
976 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
977 print "# static count_type_test"
978 print "\tresolved:\tunresolved\tskipped\ttotal"
979 var count_type_test_total = init_count_type_test_tags
980 count_type_test_resolved["total"] = 0
981 count_type_test_unresolved["total"] = 0
982 count_type_test_skipped["total"] = 0
983 count_type_test_total["total"] = 0
984 for tag in count_type_test_tags do
985 count_type_test_total[tag] = count_type_test_resolved[tag] + count_type_test_unresolved[tag] + count_type_test_skipped[tag]
986 count_type_test_resolved["total"] += count_type_test_resolved[tag]
987 count_type_test_unresolved["total"] += count_type_test_unresolved[tag]
988 count_type_test_skipped["total"] += count_type_test_skipped[tag]
989 count_type_test_total["total"] += count_type_test_total[tag]
991 var count_type_test = count_type_test_total["total"]
992 var tags = count_type_test_tags.to_a
996 printn "\t{count_type_test_resolved[tag]} ({div(count_type_test_resolved[tag],count_type_test)}%)"
997 printn "\t{count_type_test_unresolved[tag]} ({div(count_type_test_unresolved[tag],count_type_test)}%)"
998 printn "\t{count_type_test_skipped[tag]} ({div(count_type_test_skipped[tag],count_type_test)}%)"
999 printn "\t{count_type_test_total[tag]} ({div(count_type_test_total[tag],count_type_test)}%)"
1005 fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
1008 # Avoid division by zero by returning the string "n/a"
1009 fun div(a,b:Int):String
1011 if b == 0 then return "n/a"
1012 return ((a*10000/b).to_f / 100.0).to_precision(2)
1016 # A file unit (may be more than one file if
1017 # A file unit aim to be autonomous and is made or one or more `CodeWriter`s
1020 var writers = new Array[CodeWriter]
1021 var required_declarations = new HashSet[String]
1024 # Where to store generated lines
1027 var lines: List[String] = new List[String]
1028 var decl_lines: List[String] = new List[String]
1030 # Add a line in the main part of the generated C
1031 fun add(s: String) do self.lines.add(s)
1034 # (used for local or global declaration)
1035 fun add_decl(s: String) do self.decl_lines.add(s)
1037 init(file: CodeFile)
1040 file.writers.add(self)
1044 # A visitor on the AST of property definition that generate the C code.
1045 abstract class AbstractCompilerVisitor
1047 type COMPILER: AbstractCompiler
1049 # The associated compiler
1050 var compiler: COMPILER
1052 # The current visited AST node
1053 var current_node: nullable ANode = null is writable
1055 # The current `Frame`
1056 var frame: nullable Frame is writable
1058 # Alias for self.compiler.mainmodule.object_type
1059 fun object_type: MClassType do return self.compiler.mainmodule.object_type
1061 # Alias for self.compiler.mainmodule.bool_type
1062 fun bool_type: MClassType do return self.compiler.mainmodule.bool_type
1064 var writer: CodeWriter
1066 init(compiler: COMPILER)
1068 self.compiler = compiler
1069 self.writer = new CodeWriter(compiler.files.last)
1072 # Force to get the primitive class named `name
` or abort
1073 fun get_class(name: String): MClass do return self.compiler.mainmodule.get_primitive_class(name)
1075 # Force to get the primitive property named `name
` in the instance `recv
` or abort
1076 fun get_property(name: String, recv: MType): MMethod
1078 assert recv isa MClassType
1079 return self.compiler.modelbuilder.force_get_primitive_method(self.current_node, name, recv.mclass, self.compiler.mainmodule)
1082 fun compile_callsite(callsite: CallSite, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1084 var initializers = callsite.mpropdef.initializers
1085 if not initializers.is_empty then
1086 var recv = arguments.first
1089 for p in initializers do
1090 if p isa MMethod then
1092 for x in p.intro.msignature.mparameters do
1093 args.add arguments[i]
1097 else if p isa MAttribute then
1098 self.write_attribute(p, recv, arguments[i])
1102 assert i == arguments.length
1104 return self.send(callsite.mproperty, [recv])
1107 return self.send(callsite.mproperty, arguments)
1110 fun native_array_instance(elttype: MType, length: RuntimeVariable): RuntimeVariable is abstract
1112 fun calloc_array(ret_type: MType, arguments: Array[RuntimeVariable]) is abstract
1114 fun native_array_def(pname: String, ret_type: nullable MType, arguments: Array[RuntimeVariable]) is abstract
1116 # Evaluate `args
` as expressions in the call of `mpropdef
` on `recv
`.
1117 # This method is used to manage varargs in signatures and returns the real array
1118 # of runtime variables to use in the call.
1119 fun varargize(mpropdef: MMethodDef, recv: RuntimeVariable, args: SequenceRead[AExpr]): Array[RuntimeVariable]
1121 var msignature = mpropdef.new_msignature or else mpropdef.msignature.as(not null)
1122 var res = new Array[RuntimeVariable]
1125 if args.is_empty then return res
1127 var vararg_rank = msignature.vararg_rank
1128 var vararg_len = args.length - msignature.arity
1129 if vararg_len < 0 then vararg_len = 0
1131 for i in [0..msignature.arity[ do
1132 if i == vararg_rank then
1134 if ne isa AVarargExpr then
1135 var e = self.expr(ne.n_expr, null)
1139 var vararg = new Array[RuntimeVariable]
1140 for j in [vararg_rank..vararg_rank+vararg_len] do
1141 var e = self.expr(args[j], null)
1144 var elttype = msignature.mparameters[vararg_rank].mtype
1145 var arg = self.vararg_instance(mpropdef, recv, vararg, elttype)
1149 if i > vararg_rank then j += vararg_len
1150 var e = self.expr(args[j], null)
1159 # Anchor a type to the main module and the current receiver
1160 fun anchor(mtype: MType): MType
1162 if not mtype.need_anchor then return mtype
1163 return mtype.anchor_to(self.compiler.mainmodule, self.frame.receiver)
1166 fun resolve_for(mtype: MType, recv: RuntimeVariable): MType
1168 if not mtype.need_anchor then return mtype
1169 return mtype.resolve_for(recv.mcasttype, self.frame.receiver, self.compiler.mainmodule, true)
1172 # Unsafely cast a value to a new type
1173 # ie the result share the same C variable but my have a different mcasttype
1174 # NOTE: if the adaptation is useless then `value
` is returned as it.
1175 # ENSURE: `result
.name
== value
.name
`
1176 fun autoadapt(value: RuntimeVariable, mtype: MType): RuntimeVariable
1178 mtype = self.anchor(mtype)
1179 var valmtype = value.mcasttype
1180 if valmtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1184 if valmtype isa MNullableType and valmtype.mtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1185 var res = new RuntimeVariable(value.name, valmtype, valmtype.mtype)
1188 var res = new RuntimeVariable(value.name, valmtype, mtype)
1193 # Generate a super call from a method definition
1194 fun supercall(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1196 # Adapt the arguments of a method according to targetted `MMethodDef`
1197 fun adapt_signature(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1199 # Unbox all the arguments of a method when implemented `extern` or `intern`
1200 fun unbox_signature_extern(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1202 # Box or unbox a value to another type iff a C type conversion is needed
1203 # ENSURE: `result
.mtype
.ctype
== mtype
.ctype
`
1204 fun autobox(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1206 # Box extern classes to be used in the generated code
1207 fun box_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1209 # Unbox extern classes to be used in extern code (legacy NI and FFI)
1210 fun unbox_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1212 # Generate a polymorphic subtype test
1213 fun type_test(value: RuntimeVariable, mtype: MType, tag: String): RuntimeVariable is abstract
1215 # Generate the code required to dynamically check if 2 objects share the same runtime type
1216 fun is_same_type_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1218 # Generate a Nit "is" for two runtime_variables
1219 fun equal_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1223 # Generate a static call on a method definition
1224 fun call(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1226 # Generate a polymorphic send for the method `m
` and the arguments `args
`
1227 fun send(m: MMethod, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1229 # Generate a monomorphic send for the method `m
`, the type `t
` and the arguments `args
`
1230 fun monomorphic_send(m: MMethod, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1232 assert t isa MClassType
1233 var propdef = m.lookup_first_definition(self.compiler.mainmodule, t)
1234 return self.call(propdef, t, args)
1237 # Generate a monomorphic super send from the method `m
`, the type `t
` and the arguments `args
`
1238 fun monomorphic_super_send(m: MMethodDef, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1240 assert t isa MClassType
1241 m = m.lookup_next_definition(self.compiler.mainmodule, t)
1242 return self.call(m, t, args)
1245 # Attributes handling
1247 # Generate a polymorphic attribute is_set test
1248 fun isset_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1250 # Generate a polymorphic attribute read
1251 fun read_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1253 # Generate a polymorphic attribute write
1254 fun write_attribute(a: MAttribute, recv: RuntimeVariable, value: RuntimeVariable) is abstract
1258 # Add a check and an abort for a null receiver if needed
1259 fun check_recv_notnull(recv: RuntimeVariable)
1261 if self.compiler.modelbuilder.toolcontext.opt_no_check_null.value then return
1263 var maybenull = recv.mcasttype isa MNullableType or recv.mcasttype isa MNullType
1265 self.add("if (unlikely({recv} == NULL)) \{")
1266 self.add_abort("Receiver is null")
1273 private var names = new HashSet[String]
1274 private var last: Int = 0
1276 # Return a new name based on `s
` and unique in the visitor
1277 fun get_name(s: String): String
1279 if not self.names.has(s) then
1283 var i = self.last + 1
1286 if not self.names.has(s2) then
1295 # Return an unique and stable identifier associated with an escapemark
1296 fun escapemark_name(e: nullable EscapeMark): String
1299 if escapemark_names.has_key(e) then return escapemark_names[e]
1301 if name == null then name = "label"
1302 name = get_name(name)
1303 escapemark_names[e] = name
1307 # Insert a C label for associated with an escapemark
1308 fun add_escape_label(e: nullable EscapeMark)
1310 if e == null then return
1311 if e.escapes.is_empty then return
1312 add("BREAK_{escapemark_name(e)}: (void)0;")
1315 private var escapemark_names = new HashMap[EscapeMark, String]
1317 # Return a "const char*" variable associated to the classname of the dynamic type of an object
1318 # NOTE: we do not return a `RuntimeVariable` "NativeString" as the class may not exist in the module/program
1319 fun class_name_string(value: RuntimeVariable): String is abstract
1321 # Variables handling
1323 protected var variables = new HashMap[Variable, RuntimeVariable]
1325 # Return the local runtime_variable associated to a Nit local variable
1326 fun variable(variable: Variable): RuntimeVariable
1328 if self.variables.has_key(variable) then
1329 return self.variables[variable]
1331 var name = self.get_name("var_{variable.name}")
1332 var mtype = variable.declared_type.as(not null)
1333 mtype = self.anchor(mtype)
1334 var res = new RuntimeVariable(name, mtype, mtype)
1335 self.add_decl("{mtype.ctype} {name} /* var {variable}: {mtype} */;")
1336 self.variables[variable] = res
1341 # Return a new uninitialized local runtime_variable
1342 fun new_var(mtype: MType): RuntimeVariable
1344 mtype = self.anchor(mtype)
1345 var name = self.get_name("var")
1346 var res = new RuntimeVariable(name, mtype, mtype)
1347 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1351 # The difference with `new_var
` is the C static type of the local variable
1352 fun new_var_extern(mtype: MType): RuntimeVariable
1354 mtype = self.anchor(mtype)
1355 var name = self.get_name("var")
1356 var res = new RuntimeVariable(name, mtype, mtype)
1357 self.add_decl("{mtype.ctype_extern} {name} /* : {mtype} for extern */;")
1361 # Return a new uninitialized named runtime_variable
1362 fun new_named_var(mtype: MType, name: String): RuntimeVariable
1364 mtype = self.anchor(mtype)
1365 var res = new RuntimeVariable(name, mtype, mtype)
1366 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1370 # Correctly assign a left and a right value
1371 # Boxing and unboxing is performed if required
1372 fun assign(left, right: RuntimeVariable)
1374 right = self.autobox(right, left.mtype)
1375 self.add("{left} = {right};")
1378 # Generate instances
1380 # Generate a alloc-instance + init-attributes
1381 fun init_instance(mtype: MClassType): RuntimeVariable is abstract
1383 # Set a GC finalizer on `recv
`, only if `recv
` isa Finalizable
1384 fun set_finalizer(recv: RuntimeVariable)
1386 var mtype = recv.mtype
1387 var finalizable_type = compiler.mainmodule.finalizable_type
1388 if finalizable_type != null and not mtype.need_anchor and
1389 mtype.is_subtype(compiler.mainmodule, null, finalizable_type) then
1390 add "gc_register_finalizer({recv});"
1394 # Generate an integer value
1395 fun int_instance(value: Int): RuntimeVariable
1397 var res = self.new_var(self.get_class("Int").mclass_type)
1398 self.add("{res} = {value};")
1402 # Generate an integer value
1403 fun bool_instance(value: Bool): RuntimeVariable
1405 var res = self.new_var(self.get_class("Bool").mclass_type)
1407 self.add("{res} = 1;")
1409 self.add("{res} = 0;")
1414 # Generate a string value
1415 fun string_instance(string: String): RuntimeVariable
1417 var mtype = self.get_class("String").mclass_type
1418 var name = self.get_name("varonce")
1419 self.add_decl("static {mtype.ctype} {name};")
1420 var res = self.new_var(mtype)
1421 self.add("if ({name}) \{")
1422 self.add("{res} = {name};")
1423 self.add("\} else \{")
1424 var native_mtype = self.get_class("NativeString").mclass_type
1425 var nat = self.new_var(native_mtype)
1426 self.add("{nat} = \"{string.escape_to_c}\";")
1427 var length = self.int_instance(string.length)
1428 self.add("{res} = {self.send(self.get_property("to_s_with_length", native_mtype), [nat, length]).as(not null)};")
1429 self.add("{name} = {res};")
1434 fun value_instance(object: Object): RuntimeVariable
1436 if object isa Int then
1437 return int_instance(object)
1438 else if object isa Bool then
1439 return bool_instance(object)
1440 else if object isa String then
1441 return string_instance(object)
1447 # Generate an array value
1448 fun array_instance(array: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1450 # Get an instance of a array for a vararg
1451 fun vararg_instance(mpropdef: MPropDef, recv: RuntimeVariable, varargs: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1455 # Add a line in the main part of the generated C
1456 fun add(s: String) do self.writer.lines.add(s)
1459 # (used for local or global declaration)
1460 fun add_decl(s: String) do self.writer.decl_lines.add(s)
1462 # Request the presence of a global declaration
1463 fun require_declaration(key: String)
1465 var reqs = self.writer.file.required_declarations
1466 if reqs.has(key) then return
1468 var node = current_node
1469 if node != null then compiler.requirers_of_declarations[key] = node
1472 # Add a declaration in the local-header
1473 # The declaration is ensured to be present once
1474 fun declare_once(s: String)
1476 self.compiler.provide_declaration(s, s)
1477 self.require_declaration(s)
1480 # look for a needed .h and .c file for a given .nit source-file
1481 # FIXME: bad API, parameter should be a `MModule`, not its source-file
1482 fun add_extern(file: String)
1484 file = file.strip_extension(".nit")
1485 var tryfile = file + ".nit.h"
1486 if tryfile.file_exists then
1487 self.declare_once("#include \"{tryfile.basename("")}\"")
1488 self.compiler.files_to_copy.add(tryfile)
1490 tryfile = file + "_nit.h"
1491 if tryfile.file_exists then
1492 self.declare_once("#include \"{tryfile.basename("")}\"")
1493 self.compiler.files_to_copy.add(tryfile)
1496 if self.compiler.seen_extern.has(file) then return
1497 self.compiler.seen_extern.add(file)
1498 tryfile = file + ".nit.c"
1499 if not tryfile.file_exists then
1500 tryfile = file + "_nit.c"
1501 if not tryfile.file_exists then return
1503 var f = new ExternCFile(tryfile.basename(""), "")
1504 self.compiler.extern_bodies.add(f)
1505 self.compiler.files_to_copy.add(tryfile)
1508 # Return a new local runtime_variable initialized with the C expression `cexpr
`.
1509 fun new_expr(cexpr: String, mtype: MType): RuntimeVariable
1511 var res = new_var(mtype)
1512 self.add("{res} = {cexpr};")
1516 # Generate generic abort
1517 # used by aborts, asserts, casts, etc.
1518 fun add_abort(message: String)
1520 self.add("PRINT_ERROR(\"Runtime error: %s\", \"{message.escape_to_c}\");")
1526 if self.current_node != null and self.current_node.location.file != null then
1527 self.add("PRINT_ERROR(\" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
1529 self.add("PRINT_ERROR(\"\\n\");")
1531 self.add("show_backtrace(1);")
1534 # Add a dynamic cast
1535 fun add_cast(value: RuntimeVariable, mtype: MType, tag: String)
1537 var res = self.type_test(value, mtype, tag)
1538 self.add("if (unlikely(!{res})) \{")
1539 var cn = self.class_name_string(value)
1540 self.add("PRINT_ERROR(\"Runtime error: Cast failed. Expected `%s
`, got `%s
`\", \"{mtype.to_s.escape_to_c}\", {cn});")
1545 # Generate a return with the value `s
`
1546 fun ret(s: RuntimeVariable)
1548 self.assign(self.frame.returnvar.as(not null), s)
1549 self.add("goto {self.frame.returnlabel.as(not null)};")
1552 # Compile a statement (if any)
1553 fun stmt(nexpr: nullable AExpr)
1555 if nexpr == null then return
1556 var old = self.current_node
1557 self.current_node = nexpr
1559 self.current_node = old
1562 # Compile an expression an return its result
1563 # `mtype
` is the expected return type, pass null if no specific type is expected.
1564 fun expr(nexpr: AExpr, mtype: nullable MType): RuntimeVariable
1566 var old = self.current_node
1567 self.current_node = nexpr
1568 var res = nexpr.expr(self).as(not null)
1569 if mtype != null then
1570 mtype = self.anchor(mtype)
1571 res = self.autobox(res, mtype)
1573 res = autoadapt(res, nexpr.mtype.as(not null))
1574 var implicit_cast_to = nexpr.implicit_cast_to
1575 if implicit_cast_to != null and not self.compiler.modelbuilder.toolcontext.opt_no_check_autocast.value then
1576 add_cast(res, implicit_cast_to, "auto")
1577 res = autoadapt(res, implicit_cast_to)
1579 self.current_node = old
1583 # Alias for `self.expr
(nexpr
, self.bool_type
)`
1584 fun expr_bool(nexpr: AExpr): RuntimeVariable do return expr(nexpr, bool_type)
1586 # Safely show a debug message on the current node and repeat the message in the C code as a comment
1587 fun debug(message: String)
1589 var node = self.current_node
1590 if node == null then
1591 print "?: {message}"
1595 self.add("/* DEBUG: {message} */")
1599 # A C function associated to a Nit method
1600 # Because of customization, a given Nit method can be compiler more that once
1601 abstract class AbstractRuntimeFunction
1603 type COMPILER: AbstractCompiler
1604 type VISITOR: AbstractCompilerVisitor
1606 # The associated Nit method
1607 var mmethoddef: MMethodDef
1609 # The mangled c name of the runtime_function
1610 # Subclasses should redefine `build_c_name
` instead
1613 var res = self.c_name_cache
1614 if res != null then return res
1615 res = self.build_c_name
1616 self.c_name_cache = res
1620 # Non cached version of `c_name
`
1621 protected fun build_c_name: String is abstract
1623 protected var c_name_cache: nullable String = null is writable
1625 # Implements a call of the runtime_function
1626 # May inline the body or generate a C function call
1627 fun call(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1629 # Generate the code for the `AbstractRuntimeFunction`
1630 # Warning: compile more than once compilation makes CC unhappy
1631 fun compile_to_c(compiler: COMPILER) is abstract
1634 # A runtime variable hold a runtime value in C.
1635 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1637 # The tricky point is that a single C variable can be associated to more than one `RuntimeVariable` because the static knowledge of the type of an expression can vary in the C code.
1638 class RuntimeVariable
1639 # The name of the variable in the C code
1642 # The static type of the variable (as declard in C)
1645 # The current casted type of the variable (as known in Nit)
1646 var mcasttype: MType is writable
1648 # If the variable exaclty a mcasttype?
1649 # false (usual value) means that the variable is a mcasttype or a subtype.
1650 var is_exact: Bool = false is writable
1652 init(name: String, mtype: MType, mcasttype: MType)
1656 self.mcasttype = mcasttype
1657 assert not mtype.need_anchor
1658 assert not mcasttype.need_anchor
1661 redef fun to_s do return name
1666 if self.is_exact then
1667 exact_str = " exact"
1672 if self.mtype == self.mcasttype then
1673 type_str = "{mtype}{exact_str}"
1675 type_str = "{mtype}({mcasttype}{exact_str})"
1677 return "<{name}:{type_str}>"
1681 # A frame correspond to a visited property in a `GlobalCompilerVisitor`
1684 type VISITOR: AbstractCompilerVisitor
1686 # The associated visitor
1687 var visitor: VISITOR
1689 # The executed property.
1690 # A Method in case of a call, an attribute in case of a default initialization.
1691 var mpropdef: MPropDef
1693 # The static type of the receiver
1694 var receiver: MClassType
1696 # Arguments of the method (the first is the receiver)
1697 var arguments: Array[RuntimeVariable]
1699 # The runtime_variable associated to the return (in a function)
1700 var returnvar: nullable RuntimeVariable = null is writable
1702 # The label at the end of the property
1703 var returnlabel: nullable String = null is writable
1707 # Return the C type associated to a given Nit static type
1708 fun ctype: String do return "val*"
1710 # C type outside of the compiler code and in boxes
1711 fun ctype_extern: String do return "val*"
1713 # Short name of the `ctype
` to use in unions
1714 fun ctypename: String do return "val"
1716 # Return the name of the C structure associated to a Nit live type
1717 fun c_name: String is abstract
1718 protected var c_name_cache: nullable String is protected writable
1721 redef class MClassType
1724 var res = self.c_name_cache
1725 if res != null then return res
1726 res = "{mclass.intro_mmodule.name.to_cmangle}__{mclass.name.to_cmangle}"
1727 self.c_name_cache = res
1731 redef fun ctype: String
1733 if mclass.name == "Int" then
1735 else if mclass.name == "Bool" then
1737 else if mclass.name == "Char" then
1739 else if mclass.name == "Float" then
1741 else if mclass.name == "NativeString" then
1743 else if mclass.name == "NativeArray" then
1750 redef fun ctype_extern: String
1752 if mclass.kind == extern_kind then
1759 redef fun ctypename: String
1761 if mclass.name == "Int" then
1763 else if mclass.name == "Bool" then
1765 else if mclass.name == "Char" then
1767 else if mclass.name == "Float" then
1769 else if mclass.name == "NativeString" then
1771 else if mclass.name == "NativeArray" then
1772 #return "{self.arguments.first.ctype}*"
1780 redef class MGenericType
1783 var res = self.c_name_cache
1784 if res != null then return res
1786 for t in self.arguments do
1787 res = res + t.c_name
1789 self.c_name_cache = res
1794 redef class MParameterType
1797 var res = self.c_name_cache
1798 if res != null then return res
1799 res = "{self.mclass.c_name}_FT{self.rank}"
1800 self.c_name_cache = res
1805 redef class MVirtualType
1808 var res = self.c_name_cache
1809 if res != null then return res
1810 res = "{self.mproperty.intro.mclassdef.mclass.c_name}_VT{self.mproperty.name}"
1811 self.c_name_cache = res
1816 redef class MNullableType
1819 var res = self.c_name_cache
1820 if res != null then return res
1821 res = "nullable_{self.mtype.c_name}"
1822 self.c_name_cache = res
1828 # Return the name of the C structure associated to a Nit class
1829 fun c_name: String do
1830 var res = self.c_name_cache
1831 if res != null then return res
1832 res = "{intro_mmodule.name.to_cmangle}__{name.to_cmangle}"
1833 self.c_name_cache = res
1836 private var c_name_cache: nullable String
1839 redef class MProperty
1840 fun c_name: String do
1841 var res = self.c_name_cache
1842 if res != null then return res
1843 res = "{self.intro.c_name}"
1844 self.c_name_cache = res
1847 private var c_name_cache: nullable String
1850 redef class MPropDef
1851 type VISITOR: AbstractCompilerVisitor
1853 private var c_name_cache: nullable String
1855 # The mangled name associated to the property
1858 var res = self.c_name_cache
1859 if res != null then return res
1860 res = "{self.mclassdef.mmodule.name.to_cmangle}__{self.mclassdef.mclass.name.to_cmangle}__{self.mproperty.name.to_cmangle}"
1861 self.c_name_cache = res
1866 redef class MMethodDef
1867 # Can the body be inlined?
1868 fun can_inline(v: VISITOR): Bool
1870 if is_abstract then return true
1871 var modelbuilder = v.compiler.modelbuilder
1872 if modelbuilder.mpropdef2npropdef.has_key(self) then
1873 var npropdef = modelbuilder.mpropdef2npropdef[self]
1874 return npropdef.can_inline
1875 else if self.mproperty.is_root_init then
1876 # Automatic free init is always inlined since it is empty or contains only attribtes assigments
1883 # Inline the body in another visitor
1884 fun compile_inside_to_c(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1886 var modelbuilder = v.compiler.modelbuilder
1887 var val = constant_value
1888 if modelbuilder.mpropdef2npropdef.has_key(self) then
1889 var npropdef = modelbuilder.mpropdef2npropdef[self]
1890 var oldnode = v.current_node
1891 v.current_node = npropdef
1892 self.compile_parameter_check(v, arguments)
1893 npropdef.compile_to_c(v, self, arguments)
1894 v.current_node = oldnode
1895 else if self.mproperty.is_root_init then
1896 var nclassdef = modelbuilder.mclassdef2nclassdef[self.mclassdef]
1897 var oldnode = v.current_node
1898 v.current_node = nclassdef
1899 self.compile_parameter_check(v, arguments)
1900 nclassdef.compile_to_c(v, self, arguments)
1901 v.current_node = oldnode
1902 else if val != null then
1903 v.ret(v.value_instance(val))
1910 # Generate type checks in the C code to check covariant parameters
1911 fun compile_parameter_check(v: VISITOR, arguments: Array[RuntimeVariable])
1913 if v.compiler.modelbuilder.toolcontext.opt_no_check_covariance.value then return
1915 for i in [0..msignature.arity[ do
1916 # skip test for vararg since the array is instantiated with the correct polymorphic type
1917 if msignature.vararg_rank == i then continue
1919 # skip if the cast is not required
1920 var origmtype = self.mproperty.intro.msignature.mparameters[i].mtype
1921 if not origmtype.need_anchor then continue
1923 # get the parameter type
1924 var mtype = self.msignature.mparameters[i].mtype
1927 # note that v decides if and how to implements the cast
1928 v.add("/* Covariant cast for argument {i} ({self.msignature.mparameters[i].name}) {arguments[i+1].inspect} isa {mtype} */")
1929 v.add_cast(arguments[i+1], mtype, "covariance")
1936 redef class APropdef
1937 fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
1939 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
1940 debug("Not yet implemented")
1943 fun can_inline: Bool do return true
1946 redef class AMethPropdef
1947 redef fun compile_to_c(v, mpropdef, arguments)
1949 if mpropdef.is_abstract then
1950 var cn = v.class_name_string(arguments.first)
1951 v.add("PRINT_ERROR(\"Runtime error: Abstract method `%s
` called on `%s
`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1956 # Call the implicit super-init
1957 var auto_super_inits = self.auto_super_inits
1958 if auto_super_inits != null then
1959 var args = [arguments.first]
1960 for auto_super_init in auto_super_inits do
1961 assert auto_super_init.mproperty != mpropdef.mproperty
1963 for i in [0..auto_super_init.msignature.arity+1[ do
1964 args.add(arguments[i])
1966 assert auto_super_init.mproperty != mpropdef.mproperty
1967 v.compile_callsite(auto_super_init, args)
1970 if auto_super_call then
1971 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
1974 # Try special compilation
1975 if mpropdef.is_intern then
1976 if compile_intern_to_c(v, mpropdef, arguments) then return
1977 else if mpropdef.is_extern then
1978 if mpropdef.mproperty.is_init then
1979 if compile_externinit_to_c(v, mpropdef, arguments) then return
1981 if compile_externmeth_to_c(v, mpropdef, arguments) then return
1985 # Compile block if any
1986 var n_block = n_block
1987 if n_block != null then
1988 for i in [0..mpropdef.msignature.arity[ do
1989 var variable = self.n_signature.n_params[i].variable.as(not null)
1990 v.assign(v.variable(variable), arguments[i+1])
1997 var cn = v.class_name_string(arguments.first)
1998 v.add("PRINT_ERROR(\"Runtime error: uncompiled method `%s
` called on `%s
`. NOT YET IMPLEMENTED\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
2002 redef fun can_inline
2004 if self.auto_super_inits != null then return false
2005 var nblock = self.n_block
2006 if nblock == null then return true
2007 if (mpropdef.mproperty.name == "==" or mpropdef.mproperty.name == "!=") and mpropdef.mclassdef.mclass.name == "Object" then return true
2008 if nblock isa ABlockExpr and nblock.n_expr.length == 0 then return true
2012 fun compile_intern_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2014 var pname = mpropdef.mproperty.name
2015 var cname = mpropdef.mclassdef.mclass.name
2016 var ret = mpropdef.msignature.return_mtype
2018 ret = v.resolve_for(ret, arguments.first)
2020 if pname != "==" and pname != "!=" then
2021 v.adapt_signature(mpropdef, arguments)
2022 v.unbox_signature_extern(mpropdef, arguments)
2024 if cname == "Int" then
2025 if pname == "output" then
2026 v.add("printf(\"%ld\\n\", {arguments.first});")
2028 else if pname == "object_id" then
2029 v.ret(arguments.first)
2031 else if pname == "+" then
2032 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2034 else if pname == "-" then
2035 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2037 else if pname == "unary -" then
2038 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2040 else if pname == "*" then
2041 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
2043 else if pname == "/" then
2044 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2046 else if pname == "%" then
2047 v.ret(v.new_expr("{arguments[0]} % {arguments[1]}", ret.as(not null)))
2049 else if pname == "lshift" then
2050 v.ret(v.new_expr("{arguments[0]} << {arguments[1]}", ret.as(not null)))
2052 else if pname == "rshift" then
2053 v.ret(v.new_expr("{arguments[0]} >> {arguments[1]}", ret.as(not null)))
2055 else if pname == "==" then
2056 v.ret(v.equal_test(arguments[0], arguments[1]))
2058 else if pname == "!=" then
2059 var res = v.equal_test(arguments[0], arguments[1])
2060 v.ret(v.new_expr("!{res}", ret.as(not null)))
2062 else if pname == "<" then
2063 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2065 else if pname == ">" then
2066 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2068 else if pname == "<=" then
2069 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2071 else if pname == ">=" then
2072 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2074 else if pname == "to_f" then
2075 v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
2077 else if pname == "ascii" then
2078 v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
2081 else if cname == "Char" then
2082 if pname == "output" then
2083 v.add("printf(\"%c\", {arguments.first});")
2085 else if pname == "object_id" then
2086 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2088 else if pname == "successor" then
2089 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2091 else if pname == "predecessor" then
2092 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2094 else if pname == "==" then
2095 v.ret(v.equal_test(arguments[0], arguments[1]))
2097 else if pname == "!=" then
2098 var res = v.equal_test(arguments[0], arguments[1])
2099 v.ret(v.new_expr("!{res}", ret.as(not null)))
2101 else if pname == "<" then
2102 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2104 else if pname == ">" then
2105 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2107 else if pname == "<=" then
2108 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2110 else if pname == ">=" then
2111 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2113 else if pname == "to_i" then
2114 v.ret(v.new_expr("{arguments[0]}-'0'", ret.as(not null)))
2116 else if pname == "ascii" then
2117 v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
2120 else if cname == "Bool" then
2121 if pname == "output" then
2122 v.add("printf({arguments.first}?\"true\\n\":\"false\\n\");")
2124 else if pname == "object_id" then
2125 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2127 else if pname == "==" then
2128 v.ret(v.equal_test(arguments[0], arguments[1]))
2130 else if pname == "!=" then
2131 var res = v.equal_test(arguments[0], arguments[1])
2132 v.ret(v.new_expr("!{res}", ret.as(not null)))
2135 else if cname == "Float" then
2136 if pname == "output" then
2137 v.add("printf(\"%f\\n\", {arguments.first});")
2139 else if pname == "object_id" then
2140 v.ret(v.new_expr("(double){arguments.first}", ret.as(not null)))
2142 else if pname == "+" then
2143 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2145 else if pname == "-" then
2146 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2148 else if pname == "unary -" then
2149 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2151 else if pname == "succ" then
2152 v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
2154 else if pname == "prec" then
2155 v.ret(v.new_expr("{arguments[0]}-1", ret.as(not null)))
2157 else if pname == "*" then
2158 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
2160 else if pname == "/" then
2161 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2163 else if pname == "==" then
2164 v.ret(v.equal_test(arguments[0], arguments[1]))
2166 else if pname == "!=" then
2167 var res = v.equal_test(arguments[0], arguments[1])
2168 v.ret(v.new_expr("!{res}", ret.as(not null)))
2170 else if pname == "<" then
2171 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2173 else if pname == ">" then
2174 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2176 else if pname == "<=" then
2177 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2179 else if pname == ">=" then
2180 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2182 else if pname == "to_i" then
2183 v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
2186 else if cname == "NativeString" then
2187 if pname == "[]" then
2188 v.ret(v.new_expr("{arguments[0]}[{arguments[1]}]", ret.as(not null)))
2190 else if pname == "[]=" then
2191 v.add("{arguments[0]}[{arguments[1]}]={arguments[2]};")
2193 else if pname == "copy_to" then
2194 v.add("memmove({arguments[1]}+{arguments[4]},{arguments[0]}+{arguments[3]},{arguments[2]});")
2196 else if pname == "atoi" then
2197 v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
2199 else if pname == "new" then
2200 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2203 else if cname == "NativeArray" then
2204 v.native_array_def(pname, ret, arguments)
2207 if pname == "exit" then
2208 v.add("exit({arguments[1]});")
2210 else if pname == "sys" then
2211 v.ret(v.new_expr("glob_sys", ret.as(not null)))
2213 else if pname == "calloc_string" then
2214 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2216 else if pname == "calloc_array" then
2217 v.calloc_array(ret.as(not null), arguments)
2219 else if pname == "object_id" then
2220 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2222 else if pname == "is_same_type" then
2223 v.ret(v.is_same_type_test(arguments[0], arguments[1]))
2225 else if pname == "is_same_instance" then
2226 v.ret(v.equal_test(arguments[0], arguments[1]))
2228 else if pname == "output_class_name" then
2229 var nat = v.class_name_string(arguments.first)
2230 v.add("printf(\"%s\\n\", {nat});")
2232 else if pname == "native_class_name" then
2233 var nat = v.class_name_string(arguments.first)
2234 v.ret(v.new_expr("(char*){nat}", ret.as(not null)))
2236 else if pname == "force_garbage_collection" then
2237 v.add("nit_gcollect();")
2239 else if pname == "native_argc" then
2240 v.ret(v.new_expr("glob_argc", ret.as(not null)))
2242 else if pname == "native_argv" then
2243 v.ret(v.new_expr("glob_argv[{arguments[1]}]", ret.as(not null)))
2249 # Compile an extern method
2250 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2251 fun compile_externmeth_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2254 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2256 externname = at.arg_as_string(v.compiler.modelbuilder)
2257 if externname == null then return false
2261 if location.file != null then
2262 var file = location.file.filename
2265 var res: nullable RuntimeVariable = null
2266 var ret = mpropdef.msignature.return_mtype
2268 ret = v.resolve_for(ret, arguments.first)
2269 res = v.new_var_extern(ret)
2271 v.adapt_signature(mpropdef, arguments)
2272 v.unbox_signature_extern(mpropdef, arguments)
2275 v.add("{externname}({arguments.join(", ")});")
2277 v.add("{res} = {externname}({arguments.join(", ")});")
2278 res = v.box_extern(res, ret.as(not null))
2284 # Compile an extern factory
2285 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2286 fun compile_externinit_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2289 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2291 externname = at.arg_as_string(v.compiler.modelbuilder)
2292 if externname == null then return false
2296 if location.file != null then
2297 var file = location.file.filename
2300 v.adapt_signature(mpropdef, arguments)
2301 v.unbox_signature_extern(mpropdef, arguments)
2302 var ret = arguments.first.mtype
2303 var res = v.new_var_extern(ret)
2307 v.add("{res} = {externname}({arguments.join(", ")});")
2308 res = v.box_extern(res, ret)
2314 redef class AAttrPropdef
2315 redef fun compile_to_c(v, mpropdef, arguments)
2317 if mpropdef == mreadpropdef then
2318 assert arguments.length == 1
2319 var recv = arguments.first
2323 var ret = self.mpropdef.static_mtype
2324 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2325 var guard = self.mlazypropdef.mproperty
2327 set = v.isset_attribute(self.mpropdef.mproperty, recv)
2329 set = v.read_attribute(guard, recv)
2331 v.add("if(likely({set})) \{")
2332 res = v.read_attribute(self.mpropdef.mproperty, recv)
2335 var value = evaluate_expr(v, recv)
2337 v.assign(res, value)
2339 var true_v = v.new_expr("1", v.bool_type)
2340 v.write_attribute(guard, arguments.first, true_v)
2344 res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
2346 v.assign(v.frame.returnvar.as(not null), res)
2347 else if mpropdef == mwritepropdef then
2348 assert arguments.length == 2
2349 v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
2351 var ret = self.mpropdef.static_mtype
2352 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2354 v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.new_expr("1", v.bool_type))
2362 fun init_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2364 if has_value and not is_lazy then evaluate_expr(v, recv)
2367 # Evaluate, store and return the default value of the attribute
2368 private fun evaluate_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable): RuntimeVariable
2370 var oldnode = v.current_node
2371 v.current_node = self
2372 var old_frame = v.frame
2373 var frame = new Frame(v, self.mpropdef.as(not null), recv.mcasttype.as(MClassType), [recv])
2377 var mtype = self.mpropdef.static_mtype
2378 assert mtype != null
2380 var nexpr = self.n_expr
2381 var nblock = self.n_block
2382 if nexpr != null then
2383 value = v.expr(nexpr, mtype)
2384 else if nblock != null then
2385 value = v.new_var(mtype)
2386 frame.returnvar = value
2387 frame.returnlabel = v.get_name("RET_LABEL")
2390 v.add("{frame.returnlabel.as(not null)}:(void)0;")
2396 v.write_attribute(self.mpropdef.mproperty, recv, value)
2399 v.current_node = oldnode
2404 fun check_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2406 var nexpr = self.n_expr
2407 if nexpr != null then return
2409 var oldnode = v.current_node
2410 v.current_node = self
2411 var old_frame = v.frame
2412 var frame = new Frame(v, self.mpropdef.as(not null), recv.mtype.as(MClassType), [recv])
2414 # Force read to check the initialization
2415 v.read_attribute(self.mpropdef.mproperty, recv)
2417 v.current_node = oldnode
2421 redef class AClassdef
2422 private fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
2424 if mpropdef == self.mfree_init then
2425 assert mpropdef.mproperty.is_root_init
2426 assert arguments.length == 1
2427 if not mpropdef.is_intro then
2428 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
2438 # Try to compile self as an expression
2439 # Do not call this method directly, use `v
.expr
` instead
2440 private fun expr(v: AbstractCompilerVisitor): nullable RuntimeVariable
2442 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
2443 var mtype = self.mtype
2444 if mtype == null then
2447 var res = v.new_var(mtype)
2448 v.add("/* {res} = NOT YET {class_name} */")
2453 # Try to compile self as a statement
2454 # Do not call this method directly, use `v
.stmt
` instead
2455 private fun stmt(v: AbstractCompilerVisitor)
2461 redef class ABlockExpr
2464 for e in self.n_expr do v.stmt(e)
2468 var last = self.n_expr.last
2469 for e in self.n_expr do
2470 if e == last then break
2473 return v.expr(last, null)
2477 redef class AVardeclExpr
2480 var variable = self.variable.as(not null)
2481 var ne = self.n_expr
2483 var i = v.expr(ne, variable.declared_type)
2484 v.assign(v.variable(variable), i)
2489 redef class AVarExpr
2492 var res = v.variable(self.variable.as(not null))
2493 var mtype = self.mtype.as(not null)
2494 return v.autoadapt(res, mtype)
2498 redef class AVarAssignExpr
2501 var variable = self.variable.as(not null)
2502 var i = v.expr(self.n_value, variable.declared_type)
2503 v.assign(v.variable(variable), i)
2508 redef class AVarReassignExpr
2511 var variable = self.variable.as(not null)
2512 var vari = v.variable(variable)
2513 var value = v.expr(self.n_value, variable.declared_type)
2514 var res = v.compile_callsite(self.reassign_callsite.as(not null), [vari, value])
2516 v.assign(v.variable(variable), res)
2520 redef class ASelfExpr
2521 redef fun expr(v) do return v.frame.arguments.first
2524 redef class AEscapeExpr
2525 redef fun stmt(v) do v.add("goto BREAK_{v.escapemark_name(self.escapemark)};")
2528 redef class AReturnExpr
2531 var nexpr = self.n_expr
2532 if nexpr != null then
2533 var returnvar = v.frame.returnvar.as(not null)
2534 var i = v.expr(nexpr, returnvar.mtype)
2535 v.assign(returnvar, i)
2537 v.add("goto {v.frame.returnlabel.as(not null)};")
2541 redef class AAbortExpr
2542 redef fun stmt(v) do v.add_abort("Aborted")
2548 var cond = v.expr_bool(self.n_expr)
2549 v.add("if ({cond})\{")
2558 var res = v.new_var(self.mtype.as(not null))
2559 var cond = v.expr_bool(self.n_expr)
2560 v.add("if ({cond})\{")
2561 v.assign(res, v.expr(self.n_then.as(not null), null))
2563 v.assign(res, v.expr(self.n_else.as(not null), null))
2569 redef class AIfexprExpr
2572 var res = v.new_var(self.mtype.as(not null))
2573 var cond = v.expr_bool(self.n_expr)
2574 v.add("if ({cond})\{")
2575 v.assign(res, v.expr(self.n_then, null))
2577 v.assign(res, v.expr(self.n_else, null))
2586 v.stmt(self.n_block)
2587 v.add_escape_label(break_mark)
2591 redef class AWhileExpr
2595 var cond = v.expr_bool(self.n_expr)
2596 v.add("if (!{cond}) break;")
2597 v.stmt(self.n_block)
2598 v.add_escape_label(continue_mark)
2600 v.add_escape_label(break_mark)
2604 redef class ALoopExpr
2608 v.stmt(self.n_block)
2609 v.add_escape_label(continue_mark)
2611 v.add_escape_label(break_mark)
2615 redef class AForExpr
2618 var cl = v.expr(self.n_expr, null)
2619 var it_meth = self.method_iterator
2620 assert it_meth != null
2621 var it = v.compile_callsite(it_meth, [cl])
2624 var isok_meth = self.method_is_ok
2625 assert isok_meth != null
2626 var ok = v.compile_callsite(isok_meth, [it])
2628 v.add("if(!{ok}) break;")
2629 if self.variables.length == 1 then
2630 var item_meth = self.method_item
2631 assert item_meth != null
2632 var i = v.compile_callsite(item_meth, [it])
2634 v.assign(v.variable(variables.first), i)
2635 else if self.variables.length == 2 then
2636 var key_meth = self.method_key
2637 assert key_meth != null
2638 var i = v.compile_callsite(key_meth, [it])
2640 v.assign(v.variable(variables[0]), i)
2641 var item_meth = self.method_item
2642 assert item_meth != null
2643 i = v.compile_callsite(item_meth, [it])
2645 v.assign(v.variable(variables[1]), i)
2649 v.stmt(self.n_block)
2650 v.add_escape_label(continue_mark)
2651 var next_meth = self.method_next
2652 assert next_meth != null
2653 v.compile_callsite(next_meth, [it])
2655 v.add_escape_label(break_mark)
2657 var method_finish = self.method_finish
2658 if method_finish != null then
2659 # TODO: Find a way to call this also in long escape (e.g. return)
2660 v.compile_callsite(method_finish, [it])
2665 redef class AAssertExpr
2668 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return
2670 var cond = v.expr_bool(self.n_expr)
2671 v.add("if (unlikely(!{cond})) \{")
2675 v.add_abort("Assert '{nid.text}' failed")
2677 v.add_abort("Assert failed")
2686 var res = v.new_var(self.mtype.as(not null))
2687 var i1 = v.expr_bool(self.n_expr)
2688 v.add("if ({i1}) \{")
2691 var i2 = v.expr_bool(self.n_expr2)
2692 v.add("{res} = {i2};")
2698 redef class AImpliesExpr
2701 var res = v.new_var(self.mtype.as(not null))
2702 var i1 = v.expr_bool(self.n_expr)
2703 v.add("if (!{i1}) \{")
2706 var i2 = v.expr_bool(self.n_expr2)
2707 v.add("{res} = {i2};")
2713 redef class AAndExpr
2716 var res = v.new_var(self.mtype.as(not null))
2717 var i1 = v.expr_bool(self.n_expr)
2718 v.add("if (!{i1}) \{")
2721 var i2 = v.expr_bool(self.n_expr2)
2722 v.add("{res} = {i2};")
2728 redef class ANotExpr
2731 var cond = v.expr_bool(self.n_expr)
2732 return v.new_expr("!{cond}", self.mtype.as(not null))
2736 redef class AOrElseExpr
2739 var res = v.new_var(self.mtype.as(not null))
2740 var i1 = v.expr(self.n_expr, null)
2741 v.add("if ({i1}!=NULL) \{")
2744 var i2 = v.expr(self.n_expr2, null)
2751 redef class AIntExpr
2752 redef fun expr(v) do return v.new_expr("{self.value.to_s}", self.mtype.as(not null))
2755 redef class AFloatExpr
2756 redef fun expr(v) do return v.new_expr("{self.n_float.text}", self.mtype.as(not null)) # FIXME use value, not n_float
2759 redef class ACharExpr
2760 redef fun expr(v) do return v.new_expr("'{self.value.to_s.escape_to_c}'", self.mtype.as(not null))
2763 redef class AArrayExpr
2766 var mtype = self.mtype.as(MClassType).arguments.first
2767 var array = new Array[RuntimeVariable]
2768 for nexpr in self.n_exprs.n_exprs do
2769 var i = v.expr(nexpr, mtype)
2772 return v.array_instance(array, mtype)
2776 redef class AStringFormExpr
2777 redef fun expr(v) do return v.string_instance(self.value.as(not null))
2780 redef class ASuperstringExpr
2783 var array = new Array[RuntimeVariable]
2784 for ne in self.n_exprs do
2785 if ne isa AStringFormExpr and ne.value == "" then continue # skip empty sub-strings
2786 var i = v.expr(ne, null)
2789 var a = v.array_instance(array, v.object_type)
2790 var res = v.send(v.get_property("to_s", a.mtype), [a])
2795 redef class ACrangeExpr
2798 var i1 = v.expr(self.n_expr, null)
2799 var i2 = v.expr(self.n_expr2, null)
2800 var mtype = self.mtype.as(MClassType)
2801 var res = v.init_instance(mtype)
2802 v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2807 redef class AOrangeExpr
2810 var i1 = v.expr(self.n_expr, null)
2811 var i2 = v.expr(self.n_expr2, null)
2812 var mtype = self.mtype.as(MClassType)
2813 var res = v.init_instance(mtype)
2814 v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2819 redef class ATrueExpr
2820 redef fun expr(v) do return v.new_expr("1", self.mtype.as(not null))
2823 redef class AFalseExpr
2824 redef fun expr(v) do return v.new_expr("0", self.mtype.as(not null))
2827 redef class ANullExpr
2828 redef fun expr(v) do return v.new_expr("NULL", self.mtype.as(not null))
2831 redef class AIsaExpr
2834 var i = v.expr(self.n_expr, null)
2835 return v.type_test(i, self.cast_type.as(not null), "isa")
2839 redef class AAsCastExpr
2842 var i = v.expr(self.n_expr, null)
2843 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2845 v.add_cast(i, self.mtype.as(not null), "as")
2850 redef class AAsNotnullExpr
2853 var i = v.expr(self.n_expr, null)
2854 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2856 if i.mtype.ctype != "val*" then return i
2858 v.add("if (unlikely({i} == NULL)) \{")
2859 v.add_abort("Cast failed")
2865 redef class AParExpr
2866 redef fun expr(v) do return v.expr(self.n_expr, null)
2869 redef class AOnceExpr
2872 var mtype = self.mtype.as(not null)
2873 var name = v.get_name("varonce")
2874 var guard = v.get_name(name + "_guard")
2875 v.add_decl("static {mtype.ctype} {name};")
2876 v.add_decl("static int {guard};")
2877 var res = v.new_var(mtype)
2878 v.add("if ({guard}) \{")
2879 v.add("{res} = {name};")
2881 var i = v.expr(self.n_expr, mtype)
2882 v.add("{res} = {i};")
2883 v.add("{name} = {res};")
2884 v.add("{guard} = 1;")
2890 redef class ASendExpr
2893 var recv = v.expr(self.n_expr, null)
2894 var callsite = self.callsite.as(not null)
2895 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2896 return v.compile_callsite(callsite, args)
2900 redef class ASendReassignFormExpr
2903 var recv = v.expr(self.n_expr, null)
2904 var callsite = self.callsite.as(not null)
2905 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2907 var value = v.expr(self.n_value, null)
2909 var left = v.compile_callsite(callsite, args)
2912 var res = v.compile_callsite(self.reassign_callsite.as(not null), [left, value])
2916 v.compile_callsite(self.write_callsite.as(not null), args)
2920 redef class ASuperExpr
2923 var recv = v.frame.arguments.first
2925 var callsite = self.callsite
2926 if callsite != null then
2927 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2929 # Add additional arguments for the super init call
2930 if args.length == 1 then
2931 for i in [0..callsite.msignature.arity[ do
2932 args.add(v.frame.arguments[i+1])
2936 var res = v.compile_callsite(callsite, args)
2940 var mpropdef = self.mpropdef.as(not null)
2941 var args = v.varargize(mpropdef, recv, self.n_args.n_exprs)
2942 if args.length == 1 then
2943 args = v.frame.arguments
2946 # stantard call-next-method
2947 return v.supercall(mpropdef, recv.mtype.as(MClassType), args)
2951 redef class ANewExpr
2954 var mtype = self.recvtype
2955 assert mtype != null
2957 var ctype = mtype.ctype
2958 if mtype.mclass.name == "NativeArray" then
2959 assert self.n_args.n_exprs.length == 1
2960 var l = v.expr(self.n_args.n_exprs.first, null)
2961 assert mtype isa MGenericType
2962 var elttype = mtype.arguments.first
2963 return v.native_array_instance(elttype, l)
2964 else if ctype == "val*" then
2965 recv = v.init_instance(mtype)
2966 else if ctype == "char*" then
2967 recv = v.new_expr("NULL/*special!*/", mtype)
2969 recv = v.new_expr("({ctype})0/*special!*/", mtype)
2972 var callsite = self.callsite.as(not null)
2973 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2974 var res2 = v.compile_callsite(callsite, args)
2975 if res2 != null then
2976 #self.debug("got {res2} from {mproperty}. drop {recv}")
2983 redef class AAttrExpr
2986 var recv = v.expr(self.n_expr, null)
2987 var mproperty = self.mproperty.as(not null)
2988 return v.read_attribute(mproperty, recv)
2992 redef class AAttrAssignExpr
2995 var recv = v.expr(self.n_expr, null)
2996 var i = v.expr(self.n_value, null)
2997 var mproperty = self.mproperty.as(not null)
2998 v.write_attribute(mproperty, recv, i)
3003 redef class AAttrReassignExpr
3006 var recv = v.expr(self.n_expr, null)
3007 var value = v.expr(self.n_value, null)
3008 var mproperty = self.mproperty.as(not null)
3009 var attr = v.read_attribute(mproperty, recv)
3010 var res = v.compile_callsite(self.reassign_callsite.as(not null), [attr, value])
3012 v.write_attribute(mproperty, recv, res)
3016 redef class AIssetAttrExpr
3019 var recv = v.expr(self.n_expr, null)
3020 var mproperty = self.mproperty.as(not null)
3021 return v.isset_attribute(mproperty, recv)
3025 redef class ADebugTypeExpr
3034 redef class Array[E]
3035 # Return a new `Array` with the elements only contened in self and not in `o
`
3036 fun -(o: Array[E]): Array[E] do
3037 var res = new Array[E]
3038 for e in self do if not o.has(e) then res.add(e)
3044 # All `MProperty` associated to all `MClassDef` of `mclass
`
3045 fun properties(mclass: MClass): Set[MProperty] do
3046 if not self.properties_cache.has_key(mclass) then
3047 var properties = new HashSet[MProperty]
3048 var parents = new Array[MClass]
3049 if self.flatten_mclass_hierarchy.has(mclass) then
3050 parents.add_all(mclass.in_hierarchy(self).direct_greaters)
3052 for parent in parents do
3053 properties.add_all(self.properties(parent))
3055 for mclassdef in mclass.mclassdefs do
3056 if not self.in_importation <= mclassdef.mmodule then continue
3057 for mprop in mclassdef.intro_mproperties do
3058 properties.add(mprop)
3061 self.properties_cache[mclass] = properties
3063 return properties_cache[mclass]
3065 private var properties_cache: Map[MClass, Set[MProperty]] = new HashMap[MClass, Set[MProperty]]
3067 # Write FFI and nitni results to file
3068 fun finalize_ffi(c: AbstractCompiler) do end
3070 # Give requided addinional system libraries (as given to LD_LIBS)
3071 # Note: can return null instead of an empty set
3072 fun collect_linker_libs: nullable Set[String] do return null
3075 # Create a tool context to handle options and paths
3076 var toolcontext = new ToolContext
3078 toolcontext.tooldescription = "Usage: nitg [OPTION]... file.nit...\nCompiles Nit programs."
3080 # We do not add other options, so process them now!
3081 toolcontext.process_options(args)
3083 # We need a model to collect stufs
3084 var model = new Model
3085 # An a model builder to parse files
3086 var modelbuilder = new ModelBuilder(model, toolcontext)
3088 var arguments = toolcontext.option_context.rest
3089 if arguments.length > 1 and toolcontext.opt_output.value != null then
3090 print "Error: --output needs a single source file. Do you prefer --dir?"
3094 # Here we load an process all modules passed on the command line
3095 var mmodules = modelbuilder.parse(arguments)
3097 if mmodules.is_empty then return
3098 modelbuilder.run_phases
3100 for mmodule in mmodules do
3101 toolcontext.info("*** PROCESS {mmodule} ***", 1)
3103 toolcontext.run_global_phases(ms)