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_make_flags
= new OptionString("Additional options to make", "--make-flags")
40 var opt_max_c_lines
= new OptionInt("Maximum number of lines in generated C files. Use 0 for unlimited", 10000, "--max-c-lines")
42 var opt_group_c_files
= new OptionBool("Group all generated code in the same series of files", "--group-c-files")
44 var opt_compile_dir
= new OptionString("Directory used to generate temporary files", "--compile-dir")
46 var opt_hardening
= new OptionBool("Generate contracts in the C code against bugs in the compiler", "--hardening")
47 # --no-check-covariance
48 var opt_no_check_covariance
= new OptionBool("Disable type tests of covariant parameters (dangerous)", "--no-check-covariance")
49 # --no-check-attr-isset
50 var opt_no_check_attr_isset
= new OptionBool("Disable isset tests before each attribute access (dangerous)", "--no-check-attr-isset")
52 var opt_no_check_assert
= new OptionBool("Disable the evaluation of explicit 'assert' and 'as' (dangerous)", "--no-check-assert")
54 var opt_no_check_autocast
= new OptionBool("Disable implicit casts on unsafe expression usage (dangerous)", "--no-check-autocast")
56 var opt_no_check_null
= new OptionBool("Disable tests of null receiver (dangerous)", "--no-check-null")
58 var opt_no_check_all
= new OptionBool("Disable all tests (dangerous)", "--no-check-all")
59 # --typing-test-metrics
60 var opt_typing_test_metrics
= new OptionBool("Enable static and dynamic count of all type tests", "--typing-test-metrics")
61 # --invocation-metrics
62 var opt_invocation_metrics
= new OptionBool("Enable static and dynamic count of all method invocations", "--invocation-metrics")
63 # --isset-checks-metrics
64 var opt_isset_checks_metrics
= new OptionBool("Enable static and dynamic count of isset checks before attributes access", "--isset-checks-metrics")
66 var opt_stacktrace
= new OptionString("Control the generation of stack traces", "--stacktrace")
68 var opt_no_gcc_directive
= new OptionArray("Disable a advanced gcc directives for optimization", "--no-gcc-directive")
70 var opt_release
= new OptionBool("Compile in release mode and finalize application", "--release")
75 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
)
76 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
)
77 self.option_context
.add_option
(self.opt_typing_test_metrics
, self.opt_invocation_metrics
, self.opt_isset_checks_metrics
)
78 self.option_context
.add_option
(self.opt_stacktrace
)
79 self.option_context
.add_option
(self.opt_no_gcc_directive
)
80 self.option_context
.add_option
(self.opt_release
)
81 self.option_context
.add_option
(self.opt_max_c_lines
, self.opt_group_c_files
)
83 opt_no_main
.hidden
= true
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
155 redef fun write_and_make
(compiler
)
157 var compile_dir
= compile_dir
159 # Generate the .h and .c files
160 # A single C file regroups many compiled rumtime functions
161 # 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
163 self.toolcontext
.info
("*** WRITING C ***", 1)
167 var cfiles
= new Array[String]
168 write_files
(compiler
, compile_dir
, cfiles
)
170 # Generate the Makefile
172 write_makefile
(compiler
, compile_dir
, cfiles
)
175 self.toolcontext
.info
("*** END WRITING C: {time1-time0} ***", 2)
177 # Execute the Makefile
179 if self.toolcontext
.opt_no_cc
.value
then return
182 self.toolcontext
.info
("*** COMPILING C ***", 1)
184 compile_c_code
(compiler
, compile_dir
)
187 self.toolcontext
.info
("*** END COMPILING C: {time1-time0} ***", 2)
190 fun write_files
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
192 var platform
= compiler
.mainmodule
.target_platform
193 if self.toolcontext
.opt_stacktrace
.value
== "nitstack" and (platform
== null or platform
.supports_libunwind
) then compiler
.build_c_to_nit_bindings
194 var cc_opt_with_libgc
= "-DWITH_LIBGC"
195 if platform
!= null and not platform
.supports_libgc
then cc_opt_with_libgc
= ""
197 # Add gc_choser.h to aditionnal bodies
198 var gc_chooser
= new ExternCFile("gc_chooser.c", cc_opt_with_libgc
)
199 if cc_opt_with_libgc
!= "" then gc_chooser
.pkgconfigs
.add
"bdw-gc"
200 compiler
.extern_bodies
.add
(gc_chooser
)
201 var clib
= toolcontext
.nit_dir
/ "clib"
202 compiler
.files_to_copy
.add
"{clib}/gc_chooser.c"
203 compiler
.files_to_copy
.add
"{clib}/gc_chooser.h"
206 for m
in compiler
.mainmodule
.in_importation
.greaters
do
207 compiler
.finalize_ffi_for_module
(m
)
210 # Copy original .[ch] files to compile_dir
211 for src
in compiler
.files_to_copy
do
212 var basename
= src
.basename
("")
213 var dst
= "{compile_dir}/{basename}"
217 var hfilename
= compiler
.header
.file
.name
+ ".h"
218 var hfilepath
= "{compile_dir}/{hfilename}"
219 var h
= new OFStream.open
(hfilepath
)
220 for l
in compiler
.header
.decl_lines
do
224 for l
in compiler
.header
.lines
do
230 var max_c_lines
= toolcontext
.opt_max_c_lines
.value
231 for f
in compiler
.files
do
234 var file
: nullable OFStream = null
235 for vis
in f
.writers
do
236 if vis
== compiler
.header
then continue
237 var total_lines
= vis
.lines
.length
+ vis
.decl_lines
.length
238 if total_lines
== 0 then continue
240 if file
== null or (count
> max_c_lines
and max_c_lines
> 0) then
242 if file
!= null then file
.close
243 var cfilename
= "{f.name}.{i}.c"
244 var cfilepath
= "{compile_dir}/{cfilename}"
245 self.toolcontext
.info
("new C source files to compile: {cfilepath}", 3)
246 cfiles
.add
(cfilename
)
247 file
= new OFStream.open
(cfilepath
)
248 file
.write
"#include \"{f.name}.0.h\
"\n"
251 for l
in vis
.decl_lines
do
255 for l
in vis
.lines
do
260 if file
== null then continue
263 var cfilename
= "{f.name}.0.h"
264 var cfilepath
= "{compile_dir}/{cfilename}"
265 var hfile
: nullable OFStream = null
266 hfile
= new OFStream.open
(cfilepath
)
267 hfile
.write
"#include \"{hfilename}\
"\n"
268 for key
in f
.required_declarations
do
269 if not compiler
.provided_declarations
.has_key
(key
) then
270 var node
= compiler
.requirers_of_declarations
.get_or_null
(key
)
272 node
.debug
"No provided declaration for {key}"
274 print
"No provided declaration for {key}"
278 hfile
.write compiler
.provided_declarations
[key
]
284 self.toolcontext
.info
("Total C source files to compile: {cfiles.length}", 2)
287 fun makefile_name
(mainmodule
: MModule): String do return "{mainmodule.c_name}.mk"
289 fun default_outname
(mainmodule
: MModule): String
291 # Search a non fictive module
292 var res
= mainmodule
.name
293 while mainmodule
.is_fictive
do
294 mainmodule
= mainmodule
.in_importation
.direct_greaters
.first
295 res
= mainmodule
.name
300 # Combine options and platform informations to get the final path of the outfile
301 fun outfile
(mainmodule
: MModule): String
303 var res
= self.toolcontext
.opt_output
.value
304 if res
!= null then return res
305 res
= default_outname
(mainmodule
)
306 var dir
= self.toolcontext
.opt_dir
.value
307 if dir
!= null then return dir
.join_path
(res
)
311 fun write_makefile
(compiler
: AbstractCompiler, compile_dir
: String, cfiles
: Array[String])
313 var mainmodule
= compiler
.mainmodule
314 var platform
= compiler
.mainmodule
.target_platform
316 var outname
= outfile
(mainmodule
)
318 var real_outpath
= compile_dir
.relpath
(outname
)
319 var outpath
= real_outpath
.escape_to_mk
320 if outpath
!= real_outpath
then
321 # If the name is crazy and need escaping, we will do an indirection
322 # 1. generate the binary in the .nit_compile dir under an escaped name
323 # 2. copy the binary at the right place in the `all` goal.
324 outpath
= mainmodule
.c_name
326 var makename
= makefile_name
(mainmodule
)
327 var makepath
= "{compile_dir}/{makename}"
328 var makefile
= new OFStream.open
(makepath
)
330 var linker_options
= new HashSet[String]
331 for m
in mainmodule
.in_importation
.greaters
do
332 var libs
= m
.collect_linker_libs
333 if libs
!= null then linker_options
.add_all
(libs
)
336 makefile
.write
("CC = ccache cc\nCXX = ccache c++\nCFLAGS = -g -O2 -Wno-unused-value -Wno-switch\nCINCL =\nLDFLAGS ?= \nLDLIBS ?= -lm {linker_options.join(" ")}\n\n")
338 var ost
= toolcontext
.opt_stacktrace
.value
339 if (ost
== "libunwind" or ost
== "nitstack") and (platform
== null or platform
.supports_libunwind
) then makefile
.write
("NEED_LIBUNWIND := YesPlease\n")
341 # Dynamic adaptations
342 # While `platform` enable complex toolchains, they are statically applied
343 # For a dynamic adaptsation of the compilation, the generated Makefile should check and adapt things itself
345 # Check and adapt the targeted system
346 makefile
.write
("uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')\n")
347 makefile
.write
("ifeq ($(uname_S),Darwin)\n")
348 # remove -lunwind since it is already included on macosx
349 makefile
.write
("\tNEED_LIBUNWIND :=\n")
350 makefile
.write
("endif\n\n")
352 # Check and adapt for the compiler used
353 # clang need an additionnal `-Qunused-arguments`
354 makefile
.write
("clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')\nifeq ($(clang_check), 0)\n\tCFLAGS += -Qunused-arguments\nendif\n")
356 makefile
.write
("ifdef NEED_LIBUNWIND\n\tLDLIBS += -lunwind\nendif\n")
358 makefile
.write
("all: {outpath}\n")
359 if outpath
!= real_outpath
then
360 makefile
.write
("\tcp -- {outpath.escape_to_sh} {real_outpath.escape_to_sh.replace("$","$$")}")
364 var ofiles
= new Array[String]
365 var dep_rules
= new Array[String]
366 # Compile each generated file
368 var o
= f
.strip_extension
(".c") + ".o"
369 makefile
.write
("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -c -o {o} {f}\n\n")
374 var java_files
= new Array[ExternFile]
376 var pkgconfigs
= new Array[String]
377 for f
in compiler
.extern_bodies
do
378 pkgconfigs
.add_all f
.pkgconfigs
381 if not pkgconfigs
.is_empty
then
383 # does pkg-config exists?
384 ifneq ($(shell which pkg-config >/dev/null; echo $$?), 0)
385 $(error "Command `pkg-config` not found. Please install it")
388 for p
in pkgconfigs
do
390 # Check for library {{{p}}}
391 ifneq ($(shell pkg-config --exists '{{{p}}}'; echo $$?), 0)
392 $(error "pkg-config: package {{{p}}} is not found.")
398 # Compile each required extern body into a specific .o
399 for f
in compiler
.extern_bodies
do
400 var o
= f
.makefile_rule_name
401 var ff
= f
.filename
.basename
("")
402 makefile
.write
("{o}: {ff}\n")
403 makefile
.write
("\t{f.makefile_rule_content}\n\n")
404 dep_rules
.add
(f
.makefile_rule_name
)
406 if f
.compiles_to_o_file
then ofiles
.add
(o
)
407 if f
.add_to_jar
then java_files
.add
(f
)
410 if not java_files
.is_empty
then
411 var jar_file
= "{outpath}.jar"
413 var class_files_array
= new Array[String]
414 for f
in java_files
do class_files_array
.add
(f
.makefile_rule_name
)
415 var class_files
= class_files_array
.join
(" ")
417 makefile
.write
("{jar_file}: {class_files}\n")
418 makefile
.write
("\tjar cf {jar_file} {class_files}\n\n")
419 dep_rules
.add jar_file
424 if not pkgconfigs
.is_empty
then
425 pkg
= "`pkg-config --libs {pkgconfigs.join(" ")}`"
427 makefile
.write
("{outpath}: {dep_rules.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath.escape_to_sh} {ofiles.join(" ")} $(LDLIBS) {pkg}\n\n")
429 makefile
.write
("clean:\n\trm {ofiles.join(" ")} 2>/dev/null\n")
430 if outpath
!= real_outpath
then
431 makefile
.write
("\trm -- {outpath.escape_to_sh} 2>/dev/null\n")
434 self.toolcontext
.info
("Generated makefile: {makepath}", 2)
436 makepath
.file_copy_to
"{compile_dir}/Makefile"
439 fun compile_c_code
(compiler
: AbstractCompiler, compile_dir
: String)
441 var makename
= makefile_name
(compiler
.mainmodule
)
443 var makeflags
= self.toolcontext
.opt_make_flags
.value
444 if makeflags
== null then makeflags
= ""
445 self.toolcontext
.info
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags}", 2)
448 if self.toolcontext
.verbose_level
>= 3 then
449 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1")
451 res
= sys
.system
("make -B -C {compile_dir} -f {makename} -j 4 {makeflags} 2>&1 >/dev/null")
454 toolcontext
.error
(null, "make failed! Error code: {res}.")
459 # Singleton that store the knowledge about the compilation process
460 abstract class AbstractCompiler
461 type VISITOR: AbstractCompilerVisitor
463 # Table corresponding c_names to nit names (methods)
464 var names
= new HashMap[String, String]
466 # The main module of the program currently compiled
467 # Is assigned during the separate compilation
468 var mainmodule
: MModule is writable
470 # The real main module of the program
471 var realmainmodule
: MModule is noinit
473 # The modelbuilder used to know the model and the AST
474 var modelbuilder
: ModelBuilder is protected writable
476 # Is hardening asked? (see --hardening)
477 fun hardening
: Bool do return self.modelbuilder
.toolcontext
.opt_hardening
.value
481 self.realmainmodule
= mainmodule
484 # Force the creation of a new file
485 # The point is to avoid contamination between must-be-compiled-separately files
486 fun new_file
(name
: String): CodeFile
488 if modelbuilder
.toolcontext
.opt_group_c_files
.value
then
489 if self.files
.is_empty
then
490 var f
= new CodeFile(mainmodule
.c_name
)
493 return self.files
.first
495 var f
= new CodeFile(name
)
500 # The list of all associated files
501 # Used to generate .c files
502 var files
= new List[CodeFile]
504 # Initialize a visitor specific for a compiler engine
505 fun new_visitor
: VISITOR is abstract
507 # Where global declaration are stored (the main .h)
508 var header
: CodeWriter is writable, noinit
510 # Provide a declaration that can be requested (before or latter) by a visitor
511 fun provide_declaration
(key
: String, s
: String)
513 if self.provided_declarations
.has_key
(key
) then
514 assert self.provided_declarations
[key
] == s
516 self.provided_declarations
[key
] = s
519 private var provided_declarations
= new HashMap[String, String]
521 private var requirers_of_declarations
= new HashMap[String, ANode]
523 # Builds the .c and .h files to be used when generating a Stack Trace
524 # Binds the generated C function names to Nit function names
525 fun build_c_to_nit_bindings
527 var compile_dir
= modelbuilder
.compile_dir
529 var stream
= new OFStream.open
("{compile_dir}/c_functions_hash.c")
530 stream
.write
("#include <string.h>\n")
531 stream
.write
("#include <stdlib.h>\n")
532 stream
.write
("#include \"c_functions_hash
.h\
"\n")
533 stream
.write
("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
534 stream
.write
("const char* get_nit_name(register const char* procproc, register unsigned int len)\{\n")
535 stream
.write
("char* procname = malloc(len+1);")
536 stream
.write
("memcpy(procname, procproc, len);")
537 stream
.write
("procname[len] = '\\0';")
538 stream
.write
("static const C_Nit_Names map[{names.length}] = \{\n")
539 for i
in names
.keys
do
541 stream.write(i.escape_to_c)
542 stream.write("\
",\"")
543 stream.write(names[i].escape_to_c)
544 stream.write("\
"\},\n")
546 stream
.write
("\};\n")
547 stream
.write
("int i;")
548 stream
.write
("for(i = 0; i < {names.length}; i++)\{")
549 stream
.write
("if(strcmp(procname,map[i].name) == 0)\{")
550 stream
.write
("free(procname);")
551 stream
.write
("return map[i].nit_name;")
554 stream
.write
("free(procname);")
555 stream
.write
("return NULL;")
559 stream
= new OFStream.open
("{compile_dir}/c_functions_hash.h")
560 stream
.write
("const char* get_nit_name(register const char* procname, register unsigned int len);\n")
563 extern_bodies
.add
(new ExternCFile("{compile_dir}/c_functions_hash.c", ""))
567 # This method call compile_header_strucs method that has to be refined
568 fun compile_header
do
569 self.header
.add_decl
("#include <stdlib.h>")
570 self.header
.add_decl
("#include <stdio.h>")
571 self.header
.add_decl
("#include <string.h>")
572 self.header
.add_decl
("#include \"gc_chooser
.h\
"")
573 self.header
.add_decl
("#ifdef ANDROID")
574 self.header
.add_decl
(" #include <android/log.h>")
575 self.header
.add_decl
(" #define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\
", __VA_ARGS__)")
576 self.header
.add_decl
("#else")
577 self.header
.add_decl
(" #define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)")
578 self.header
.add_decl
("#endif")
580 compile_header_structs
581 compile_nitni_structs
583 var gccd_disable
= modelbuilder
.toolcontext
.opt_no_gcc_directive
.value
584 if gccd_disable
.has
("noreturn") or gccd_disable
.has
("all") then
585 # Signal handler function prototype
586 self.header
.add_decl
("void show_backtrace(int);")
588 self.header
.add_decl
("void show_backtrace(int) __attribute__ ((noreturn));")
591 if gccd_disable
.has
("likely") or gccd_disable
.has
("all") then
592 self.header
.add_decl
("#define likely(x) (x)")
593 self.header
.add_decl
("#define unlikely(x) (x)")
594 else if gccd_disable
.has
("correct-likely") then
595 # invert the `likely` definition
596 # Used by masochists to bench the worst case
597 self.header
.add_decl
("#define likely(x) __builtin_expect((x),0)")
598 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),1)")
600 self.header
.add_decl
("#define likely(x) __builtin_expect((x),1)")
601 self.header
.add_decl
("#define unlikely(x) __builtin_expect((x),0)")
604 # Global variable used by intern methods
605 self.header
.add_decl
("extern int glob_argc;")
606 self.header
.add_decl
("extern char **glob_argv;")
607 self.header
.add_decl
("extern val *glob_sys;")
610 # Declaration of structures for live Nit types
611 protected fun compile_header_structs
is abstract
613 # Declaration of structures for nitni undelying the FFI
614 protected fun compile_nitni_structs
616 self.header
.add_decl
"""
617 /* Native reference to Nit objects */
618 /* This structure is used to represent every Nit type in extern methods and custom C code. */
620 struct nitni_ref *next,
621 *prev; /* adjacent global references in global list */
622 int count; /* number of time this global reference has been marked */
625 /* List of global references from C code to Nit objects */
626 /* Instanciated empty at init of Nit system and filled explicitly by user in C code */
627 struct nitni_global_ref_list_t {
628 struct nitni_ref *head, *tail;
630 extern struct nitni_global_ref_list_t *nitni_global_ref_list;
632 /* Initializer of global reference list */
633 extern void nitni_global_ref_list_init();
635 /* Intern function to add a global reference to the list */
636 extern void nitni_global_ref_add( struct nitni_ref *ref );
638 /* Intern function to remove a global reference from the list */
639 extern void nitni_global_ref_remove( struct nitni_ref *ref );
641 /* Increase count on an existing global reference */
642 extern void nitni_global_ref_incr( struct nitni_ref *ref );
644 /* Decrease count on an existing global reference */
645 extern void nitni_global_ref_decr( struct nitni_ref *ref );
649 fun compile_finalizer_function
651 var finalizable_type
= mainmodule
.finalizable_type
652 if finalizable_type
== null then return
654 var finalize_meth
= mainmodule
.try_get_primitive_method
("finalize", finalizable_type
.mclass
)
656 if finalize_meth
== null then
657 modelbuilder
.toolcontext
.error
(null, "The `Finalizable` class doesn't declare the `finalize` method.")
661 var v
= self.new_visitor
662 v
.add_decl
"void gc_finalize (void *obj, void *client_data) \{"
663 var recv
= v
.new_expr
("obj", finalizable_type
)
664 v
.send
(finalize_meth
, [recv
])
668 # Generate the main C function.
672 # * allocate the Sys object if it exists
673 # * call init if is exists
674 # * call main if it exists
675 fun compile_main_function
677 var v
= self.new_visitor
678 v
.add_decl
("#include <signal.h>")
679 var ost
= modelbuilder
.toolcontext
.opt_stacktrace
.value
680 var platform
= mainmodule
.target_platform
682 if platform
!= null and not platform
.supports_libunwind
then ost
= "none"
684 var no_main
= (platform
!= null and platform
.no_main
) or modelbuilder
.toolcontext
.opt_no_main
.value
686 if ost
== "nitstack" or ost
== "libunwind" then
687 v
.add_decl
("#define UNW_LOCAL_ONLY")
688 v
.add_decl
("#include <libunwind.h>")
689 if ost
== "nitstack" then
690 v
.add_decl
("#include \"c_functions_hash
.h\
"")
693 v
.add_decl
("int glob_argc;")
694 v
.add_decl
("char **glob_argv;")
695 v
.add_decl
("val *glob_sys;")
697 if self.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
698 for tag
in count_type_test_tags
do
699 v
.add_decl
("long count_type_test_resolved_{tag};")
700 v
.add_decl
("long count_type_test_unresolved_{tag};")
701 v
.add_decl
("long count_type_test_skipped_{tag};")
702 v
.compiler
.header
.add_decl
("extern long count_type_test_resolved_{tag};")
703 v
.compiler
.header
.add_decl
("extern long count_type_test_unresolved_{tag};")
704 v
.compiler
.header
.add_decl
("extern long count_type_test_skipped_{tag};")
708 if self.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then
709 v
.add_decl
("long count_invoke_by_tables;")
710 v
.add_decl
("long count_invoke_by_direct;")
711 v
.add_decl
("long count_invoke_by_inline;")
712 v
.compiler
.header
.add_decl
("extern long count_invoke_by_tables;")
713 v
.compiler
.header
.add_decl
("extern long count_invoke_by_direct;")
714 v
.compiler
.header
.add_decl
("extern long count_invoke_by_inline;")
717 if self.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
718 v
.add_decl
("long count_attr_reads = 0;")
719 v
.add_decl
("long count_isset_checks = 0;")
720 v
.compiler
.header
.add_decl
("extern long count_attr_reads;")
721 v
.compiler
.header
.add_decl
("extern long count_isset_checks;")
724 v
.add_decl
("void sig_handler(int signo)\{")
725 v
.add_decl
("PRINT_ERROR(\"Caught signal
: %s\\n\
", strsignal(signo));")
726 v
.add_decl
("show_backtrace(signo);")
729 v
.add_decl
("void show_backtrace (int signo) \{")
730 if ost
== "nitstack" or ost
== "libunwind" then
731 v
.add_decl
("char* opt = getenv(\"NIT_NO_STACK\
");")
732 v
.add_decl
("unw_cursor_t cursor;")
733 v
.add_decl
("if(opt==NULL)\{")
734 v
.add_decl
("unw_context_t uc;")
735 v
.add_decl
("unw_word_t ip;")
736 v
.add_decl
("char* procname = malloc(sizeof(char) * 100);")
737 v
.add_decl
("unw_getcontext(&uc);")
738 v
.add_decl
("unw_init_local(&cursor, &uc);")
739 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
740 v
.add_decl
("PRINT_ERROR(\"-- Stack Trace ------------------------------\\n\
");")
741 v
.add_decl
("PRINT_ERROR(\"-------------------------------------------------\\n\
");")
742 v
.add_decl
("while (unw_step(&cursor) > 0) \{")
743 v
.add_decl
(" unw_get_proc_name(&cursor, procname, 100, &ip);")
744 if ost
== "nitstack" then
745 v
.add_decl
(" const char* recv = get_nit_name(procname, strlen(procname));")
746 v
.add_decl
(" if (recv != NULL)\{")
747 v
.add_decl
(" PRINT_ERROR(\"` %s\\n\", recv);")
748 v.add_decl(" \}else\{")
749 v.add_decl(" PRINT_ERROR(\"` %s\\n\
", procname);")
752 v
.add_decl
(" PRINT_ERROR(\"` %s \\n\",procname);")
755 v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
756 v.add_decl("free(procname);")
759 v.add_decl("exit(signo);")
763 v.add_decl("int nit_main(int argc, char** argv) \{")
765 v.add_decl("int main(int argc, char** argv) \{")
768 v.add("signal(SIGABRT, sig_handler);")
769 v.add("signal(SIGFPE, sig_handler);")
770 v.add("signal(SIGILL, sig_handler);")
771 v.add("signal(SIGINT, sig_handler);")
772 v.add("signal(SIGTERM, sig_handler);")
773 v.add("signal(SIGSEGV, sig_handler);")
774 v.add("signal(SIGPIPE, sig_handler);")
776 v.add("glob_argc = argc; glob_argv = argv;")
777 v.add("initialize_gc_option();")
779 v.add "initialize_nitni_global_refs();"
781 var main_type = mainmodule.sys_type
782 if main_type != null then
783 var mainmodule = v.compiler.mainmodule
784 var glob_sys = v.init_instance(main_type)
785 v.add("glob_sys = {glob_sys};")
786 var main_init = mainmodule.try_get_primitive_method("init", main_type.mclass)
787 if main_init != null then
788 v.send(main_init, [glob_sys])
790 var main_method = mainmodule.try_get_primitive_method("run", main_type.mclass) or else
791 mainmodule.try_get_primitive_method("main", main_type.mclass)
792 if main_method != null then
793 v.send(main_method, [glob_sys])
797 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
798 v.add_decl("long count_type_test_resolved_total = 0;")
799 v.add_decl("long count_type_test_unresolved_total = 0;")
800 v.add_decl("long count_type_test_skipped_total = 0;")
801 v.add_decl("long count_type_test_total_total = 0;")
802 for tag in count_type_test_tags do
803 v.add_decl("long count_type_test_total_{tag};")
804 v.add("count_type_test_total_{tag} = count_type_test_resolved_{tag} + count_type_test_unresolved_{tag} + count_type_test_skipped_{tag};")
805 v.add("count_type_test_resolved_total += count_type_test_resolved_{tag};")
806 v.add("count_type_test_unresolved_total += count_type_test_unresolved_{tag};")
807 v.add("count_type_test_skipped_total += count_type_test_skipped_{tag};")
808 v.add("count_type_test_total_total += count_type_test_total_{tag};")
810 v.add("printf(\"# dynamic count_type_test: total %l\\n\");")
811 v.add("printf(\"\\tresolved\\tunresolved\\tskipped\\ttotal\\n\");")
812 var tags = count_type_test_tags.to_a
815 v.add("printf(\"{tag}\");")
816 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_resolved_{tag}, 100.0*count_type_test_resolved_{tag}/count_type_test_total_total);")
817 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_unresolved_{tag}, 100.0*count_type_test_unresolved_{tag}/count_type_test_total_total);")
818 v.add("printf(\"\\t%ld (%.2f%%)\", count_type_test_skipped_{tag}, 100.0*count_type_test_skipped_{tag}/count_type_test_total_total);")
819 v.add("printf(\"\\t%ld (%.2f%%)\\n\", count_type_test_total_{tag}, 100.0*count_type_test_total_{tag}/count_type_test_total_total);")
823 if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
824 v.add_decl("long count_invoke_total;")
825 v.add("count_invoke_total = count_invoke_by_tables + count_invoke_by_direct + count_invoke_by_inline;")
826 v.add("printf(\"# dynamic count_invocation: total %ld\\n\", count_invoke_total);")
827 v.add("printf(\"by table: %ld (%.2f%%)\\n\", count_invoke_by_tables, 100.0*count_invoke_by_tables/count_invoke_total);")
828 v.add("printf(\"direct: %ld (%.2f%%)\\n\", count_invoke_by_direct, 100.0*count_invoke_by_direct/count_invoke_total);")
829 v.add("printf(\"inlined: %ld (%.2f%%)\\n\", count_invoke_by_inline, 100.0*count_invoke_by_inline/count_invoke_total);")
832 if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
833 v.add("printf(\"# dynamic attribute reads: %ld\\n\", count_attr_reads);")
834 v.add("printf(\"# dynamic isset checks: %ld\\n\", count_isset_checks);")
841 # Copile all C functions related to the [incr|decr]_ref features of the FFI
842 fun compile_nitni_global_ref_functions
844 var v = self.new_visitor
846 struct nitni_global_ref_list_t *nitni_global_ref_list;
847 void initialize_nitni_global_refs() {
848 nitni_global_ref_list = (struct nitni_global_ref_list_t*)nit_alloc(sizeof(struct nitni_global_ref_list_t));
849 nitni_global_ref_list->head = NULL;
850 nitni_global_ref_list->tail = NULL;
853 void nitni_global_ref_add( struct nitni_ref *ref ) {
854 if ( nitni_global_ref_list->head == NULL ) {
855 nitni_global_ref_list->head = ref;
858 nitni_global_ref_list->tail->next = ref;
859 ref->prev = nitni_global_ref_list->tail;
861 nitni_global_ref_list->tail = ref;
866 void nitni_global_ref_remove( struct nitni_ref *ref ) {
867 if ( ref->prev == NULL ) {
868 nitni_global_ref_list->head = ref->next;
870 ref->prev->next = ref->next;
873 if ( ref->next == NULL ) {
874 nitni_global_ref_list->tail = ref->prev;
876 ref->next->prev = ref->prev;
880 extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
881 if ( ref->count == 0 ) /* not registered */
884 nitni_global_ref_add( ref );
890 extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
891 if ( ref->count == 1 ) /* was last reference */
893 /* remove from list */
894 nitni_global_ref_remove( ref );
902 # List of additional files required to compile (FFI)
903 var extern_bodies = new Array[ExternFile]
905 # List of source files to copy over to the compile dir
906 var files_to_copy = new Array[String]
908 # This is used to avoid adding an extern file more than once
909 private var seen_extern = new ArraySet[String]
911 # Generate code that initialize the attributes on a new instance
912 fun generate_init_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
914 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
915 self.mainmodule.linearize_mclassdefs(cds)
917 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
918 var n = self.modelbuilder.mclassdef2nclassdef[cd]
919 for npropdef in n.n_propdefs do
920 if npropdef isa AAttrPropdef then
921 npropdef.init_expr(v, recv)
927 # Generate code that check if an attribute is correctly initialized
928 fun generate_check_attr(v: VISITOR, recv: RuntimeVariable, mtype: MClassType)
930 var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
931 self.mainmodule.linearize_mclassdefs(cds)
933 if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
934 var n = self.modelbuilder.mclassdef2nclassdef[cd]
935 for npropdef in n.n_propdefs do
936 if npropdef isa AAttrPropdef then
937 npropdef.check_expr(v, recv)
945 var count_type_test_tags: Array[String] = ["isa", "as", "auto", "covariance", "erasure"]
946 var count_type_test_resolved: HashMap[String, Int] = init_count_type_test_tags
947 var count_type_test_unresolved: HashMap[String, Int] = init_count_type_test_tags
948 var count_type_test_skipped: HashMap[String, Int] = init_count_type_test_tags
950 protected fun init_count_type_test_tags: HashMap[String, Int]
952 var res = new HashMap[String, Int]
953 for tag in count_type_test_tags do
959 # Display stats about compilation process
963 # * type tests against resolved types (`x
isa Collection[Animal]`)
964 # * type tests against unresolved types (`x
isa Collection[E
]`)
965 # * type tests skipped
969 if self.modelbuilder.toolcontext.opt_typing_test_metrics.value then
970 print "# static count_type_test"
971 print "\tresolved:\tunresolved\tskipped\ttotal"
972 var count_type_test_total = init_count_type_test_tags
973 count_type_test_resolved["total"] = 0
974 count_type_test_unresolved["total"] = 0
975 count_type_test_skipped["total"] = 0
976 count_type_test_total["total"] = 0
977 for tag in count_type_test_tags do
978 count_type_test_total[tag] = count_type_test_resolved[tag] + count_type_test_unresolved[tag] + count_type_test_skipped[tag]
979 count_type_test_resolved["total"] += count_type_test_resolved[tag]
980 count_type_test_unresolved["total"] += count_type_test_unresolved[tag]
981 count_type_test_skipped["total"] += count_type_test_skipped[tag]
982 count_type_test_total["total"] += count_type_test_total[tag]
984 var count_type_test = count_type_test_total["total"]
985 var tags = count_type_test_tags.to_a
989 printn "\t{count_type_test_resolved[tag]} ({div(count_type_test_resolved[tag],count_type_test)}%)"
990 printn "\t{count_type_test_unresolved[tag]} ({div(count_type_test_unresolved[tag],count_type_test)}%)"
991 printn "\t{count_type_test_skipped[tag]} ({div(count_type_test_skipped[tag],count_type_test)}%)"
992 printn "\t{count_type_test_total[tag]} ({div(count_type_test_total[tag],count_type_test)}%)"
998 fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
1001 # Avoid division by zero by returning the string "n/a"
1002 fun div(a,b:Int):String
1004 if b == 0 then return "n/a"
1005 return ((a*10000/b).to_f / 100.0).to_precision(2)
1009 # A file unit (may be more than one file if
1010 # A file unit aim to be autonomous and is made or one or more `CodeWriter`s
1013 var writers = new Array[CodeWriter]
1014 var required_declarations = new HashSet[String]
1017 # Where to store generated lines
1020 var lines: List[String] = new List[String]
1021 var decl_lines: List[String] = new List[String]
1023 # Add a line in the main part of the generated C
1024 fun add(s: String) do self.lines.add(s)
1027 # (used for local or global declaration)
1028 fun add_decl(s: String) do self.decl_lines.add(s)
1032 file.writers.add(self)
1036 # A visitor on the AST of property definition that generate the C code.
1037 abstract class AbstractCompilerVisitor
1039 type COMPILER: AbstractCompiler
1041 # The associated compiler
1042 var compiler: COMPILER
1044 # The current visited AST node
1045 var current_node: nullable ANode = null is writable
1047 # The current `Frame`
1048 var frame: nullable Frame = null is writable
1050 # Alias for self.compiler.mainmodule.object_type
1051 fun object_type: MClassType do return self.compiler.mainmodule.object_type
1053 # Alias for self.compiler.mainmodule.bool_type
1054 fun bool_type: MClassType do return self.compiler.mainmodule.bool_type
1056 var writer: CodeWriter is noinit
1060 self.writer = new CodeWriter(compiler.files.last)
1063 # Force to get the primitive class named `name
` or abort
1064 fun get_class(name: String): MClass do return self.compiler.mainmodule.get_primitive_class(name)
1066 # Force to get the primitive property named `name
` in the instance `recv
` or abort
1067 fun get_property(name: String, recv: MType): MMethod
1069 assert recv isa MClassType
1070 return self.compiler.modelbuilder.force_get_primitive_method(self.current_node, name, recv.mclass, self.compiler.mainmodule)
1073 fun compile_callsite(callsite: CallSite, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1075 var initializers = callsite.mpropdef.initializers
1076 if not initializers.is_empty then
1077 var recv = arguments.first
1080 for p in initializers do
1081 if p isa MMethod then
1083 for x in p.intro.msignature.mparameters do
1084 args.add arguments[i]
1088 else if p isa MAttribute then
1089 self.write_attribute(p, recv, arguments[i])
1093 assert i == arguments.length
1095 return self.send(callsite.mproperty, [recv])
1098 return self.send(callsite.mproperty, arguments)
1101 fun native_array_instance(elttype: MType, length: RuntimeVariable): RuntimeVariable is abstract
1103 fun calloc_array(ret_type: MType, arguments: Array[RuntimeVariable]) is abstract
1105 fun native_array_def(pname: String, ret_type: nullable MType, arguments: Array[RuntimeVariable]) is abstract
1107 # Evaluate `args
` as expressions in the call of `mpropdef
` on `recv
`.
1108 # This method is used to manage varargs in signatures and returns the real array
1109 # of runtime variables to use in the call.
1110 fun varargize(mpropdef: MMethodDef, recv: RuntimeVariable, args: SequenceRead[AExpr]): Array[RuntimeVariable]
1112 var msignature = mpropdef.new_msignature or else mpropdef.msignature.as(not null)
1113 var res = new Array[RuntimeVariable]
1116 if args.is_empty then return res
1118 var vararg_rank = msignature.vararg_rank
1119 var vararg_len = args.length - msignature.arity
1120 if vararg_len < 0 then vararg_len = 0
1122 for i in [0..msignature.arity[ do
1123 if i == vararg_rank then
1125 if ne isa AVarargExpr then
1126 var e = self.expr(ne.n_expr, null)
1130 var vararg = new Array[RuntimeVariable]
1131 for j in [vararg_rank..vararg_rank+vararg_len] do
1132 var e = self.expr(args[j], null)
1135 var elttype = msignature.mparameters[vararg_rank].mtype
1136 var arg = self.vararg_instance(mpropdef, recv, vararg, elttype)
1140 if i > vararg_rank then j += vararg_len
1141 var e = self.expr(args[j], null)
1150 # Anchor a type to the main module and the current receiver
1151 fun anchor(mtype: MType): MType
1153 if not mtype.need_anchor then return mtype
1154 return mtype.anchor_to(self.compiler.mainmodule, self.frame.receiver)
1157 fun resolve_for(mtype: MType, recv: RuntimeVariable): MType
1159 if not mtype.need_anchor then return mtype
1160 return mtype.resolve_for(recv.mcasttype, self.frame.receiver, self.compiler.mainmodule, true)
1163 # Unsafely cast a value to a new type
1164 # ie the result share the same C variable but my have a different mcasttype
1165 # NOTE: if the adaptation is useless then `value
` is returned as it.
1166 # ENSURE: `result
.name
== value
.name
`
1167 fun autoadapt(value: RuntimeVariable, mtype: MType): RuntimeVariable
1169 mtype = self.anchor(mtype)
1170 var valmtype = value.mcasttype
1171 if valmtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1175 if valmtype isa MNullableType and valmtype.mtype.is_subtype(self.compiler.mainmodule, null, mtype) then
1176 var res = new RuntimeVariable(value.name, valmtype, valmtype.mtype)
1179 var res = new RuntimeVariable(value.name, valmtype, mtype)
1184 # Generate a super call from a method definition
1185 fun supercall(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1187 # Adapt the arguments of a method according to targetted `MMethodDef`
1188 fun adapt_signature(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1190 # Unbox all the arguments of a method when implemented `extern` or `intern`
1191 fun unbox_signature_extern(m: MMethodDef, args: Array[RuntimeVariable]) is abstract
1193 # Box or unbox a value to another type iff a C type conversion is needed
1194 # ENSURE: `result
.mtype
.ctype
== mtype
.ctype
`
1195 fun autobox(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1197 # Box extern classes to be used in the generated code
1198 fun box_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1200 # Unbox extern classes to be used in extern code (legacy NI and FFI)
1201 fun unbox_extern(value: RuntimeVariable, mtype: MType): RuntimeVariable is abstract
1203 # Generate a polymorphic subtype test
1204 fun type_test(value: RuntimeVariable, mtype: MType, tag: String): RuntimeVariable is abstract
1206 # Generate the code required to dynamically check if 2 objects share the same runtime type
1207 fun is_same_type_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1209 # Generate a Nit "is" for two runtime_variables
1210 fun equal_test(value1, value2: RuntimeVariable): RuntimeVariable is abstract
1214 # Generate a static call on a method definition
1215 fun call(m: MMethodDef, recvtype: MClassType, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1217 # Generate a polymorphic send for the method `m
` and the arguments `args
`
1218 fun send(m: MMethod, args: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1220 # Generate a monomorphic send for the method `m
`, the type `t
` and the arguments `args
`
1221 fun monomorphic_send(m: MMethod, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1223 assert t isa MClassType
1224 var propdef = m.lookup_first_definition(self.compiler.mainmodule, t)
1225 return self.call(propdef, t, args)
1228 # Generate a monomorphic super send from the method `m
`, the type `t
` and the arguments `args
`
1229 fun monomorphic_super_send(m: MMethodDef, t: MType, args: Array[RuntimeVariable]): nullable RuntimeVariable
1231 assert t isa MClassType
1232 m = m.lookup_next_definition(self.compiler.mainmodule, t)
1233 return self.call(m, t, args)
1236 # Attributes handling
1238 # Generate a polymorphic attribute is_set test
1239 fun isset_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1241 # Generate a polymorphic attribute read
1242 fun read_attribute(a: MAttribute, recv: RuntimeVariable): RuntimeVariable is abstract
1244 # Generate a polymorphic attribute write
1245 fun write_attribute(a: MAttribute, recv: RuntimeVariable, value: RuntimeVariable) is abstract
1249 # Add a check and an abort for a null receiver if needed
1250 fun check_recv_notnull(recv: RuntimeVariable)
1252 if self.compiler.modelbuilder.toolcontext.opt_no_check_null.value then return
1254 var maybenull = recv.mcasttype isa MNullableType or recv.mcasttype isa MNullType
1256 self.add("if (unlikely({recv} == NULL)) \{")
1257 self.add_abort("Receiver is null")
1264 private var names = new HashSet[String]
1265 private var last: Int = 0
1267 # Return a new name based on `s
` and unique in the visitor
1268 fun get_name(s: String): String
1270 if not self.names.has(s) then
1274 var i = self.last + 1
1277 if not self.names.has(s2) then
1286 # Return an unique and stable identifier associated with an escapemark
1287 fun escapemark_name(e: nullable EscapeMark): String
1290 if escapemark_names.has_key(e) then return escapemark_names[e]
1292 if name == null then name = "label"
1293 name = get_name(name)
1294 escapemark_names[e] = name
1298 # Insert a C label for associated with an escapemark
1299 fun add_escape_label(e: nullable EscapeMark)
1301 if e == null then return
1302 if e.escapes.is_empty then return
1303 add("BREAK_{escapemark_name(e)}: (void)0;")
1306 private var escapemark_names = new HashMap[EscapeMark, String]
1308 # Return a "const char*" variable associated to the classname of the dynamic type of an object
1309 # NOTE: we do not return a `RuntimeVariable` "NativeString" as the class may not exist in the module/program
1310 fun class_name_string(value: RuntimeVariable): String is abstract
1312 # Variables handling
1314 protected var variables = new HashMap[Variable, RuntimeVariable]
1316 # Return the local runtime_variable associated to a Nit local variable
1317 fun variable(variable: Variable): RuntimeVariable
1319 if self.variables.has_key(variable) then
1320 return self.variables[variable]
1322 var name = self.get_name("var_{variable.name}")
1323 var mtype = variable.declared_type.as(not null)
1324 mtype = self.anchor(mtype)
1325 var res = new RuntimeVariable(name, mtype, mtype)
1326 self.add_decl("{mtype.ctype} {name} /* var {variable}: {mtype} */;")
1327 self.variables[variable] = res
1332 # Return a new uninitialized local runtime_variable
1333 fun new_var(mtype: MType): RuntimeVariable
1335 mtype = self.anchor(mtype)
1336 var name = self.get_name("var")
1337 var res = new RuntimeVariable(name, mtype, mtype)
1338 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1342 # The difference with `new_var
` is the C static type of the local variable
1343 fun new_var_extern(mtype: MType): RuntimeVariable
1345 mtype = self.anchor(mtype)
1346 var name = self.get_name("var")
1347 var res = new RuntimeVariable(name, mtype, mtype)
1348 self.add_decl("{mtype.ctype_extern} {name} /* : {mtype} for extern */;")
1352 # Return a new uninitialized named runtime_variable
1353 fun new_named_var(mtype: MType, name: String): RuntimeVariable
1355 mtype = self.anchor(mtype)
1356 var res = new RuntimeVariable(name, mtype, mtype)
1357 self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
1361 # Correctly assign a left and a right value
1362 # Boxing and unboxing is performed if required
1363 fun assign(left, right: RuntimeVariable)
1365 right = self.autobox(right, left.mtype)
1366 self.add("{left} = {right};")
1369 # Generate instances
1371 # Generate a alloc-instance + init-attributes
1372 fun init_instance(mtype: MClassType): RuntimeVariable is abstract
1374 # Set a GC finalizer on `recv
`, only if `recv
` isa Finalizable
1375 fun set_finalizer(recv: RuntimeVariable)
1377 var mtype = recv.mtype
1378 var finalizable_type = compiler.mainmodule.finalizable_type
1379 if finalizable_type != null and not mtype.need_anchor and
1380 mtype.is_subtype(compiler.mainmodule, null, finalizable_type) then
1381 add "gc_register_finalizer({recv});"
1385 # Generate an integer value
1386 fun int_instance(value: Int): RuntimeVariable
1388 var res = self.new_var(self.get_class("Int").mclass_type)
1389 self.add("{res} = {value};")
1393 # Generate an integer value
1394 fun bool_instance(value: Bool): RuntimeVariable
1396 var res = self.new_var(self.get_class("Bool").mclass_type)
1398 self.add("{res} = 1;")
1400 self.add("{res} = 0;")
1405 # Generate a string value
1406 fun string_instance(string: String): RuntimeVariable
1408 var mtype = self.get_class("String").mclass_type
1409 var name = self.get_name("varonce")
1410 self.add_decl("static {mtype.ctype} {name};")
1411 var res = self.new_var(mtype)
1412 self.add("if ({name}) \{")
1413 self.add("{res} = {name};")
1414 self.add("\} else \{")
1415 var native_mtype = self.get_class("NativeString").mclass_type
1416 var nat = self.new_var(native_mtype)
1417 self.add("{nat} = \"{string.escape_to_c}\";")
1418 var length = self.int_instance(string.length)
1419 self.add("{res} = {self.send(self.get_property("to_s_with_length", native_mtype), [nat, length]).as(not null)};")
1420 self.add("{name} = {res};")
1425 fun value_instance(object: Object): RuntimeVariable
1427 if object isa Int then
1428 return int_instance(object)
1429 else if object isa Bool then
1430 return bool_instance(object)
1431 else if object isa String then
1432 return string_instance(object)
1438 # Generate an array value
1439 fun array_instance(array: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1441 # Get an instance of a array for a vararg
1442 fun vararg_instance(mpropdef: MPropDef, recv: RuntimeVariable, varargs: Array[RuntimeVariable], elttype: MType): RuntimeVariable is abstract
1446 # Add a line in the main part of the generated C
1447 fun add(s: String) do self.writer.lines.add(s)
1450 # (used for local or global declaration)
1451 fun add_decl(s: String) do self.writer.decl_lines.add(s)
1453 # Request the presence of a global declaration
1454 fun require_declaration(key: String)
1456 var reqs = self.writer.file.required_declarations
1457 if reqs.has(key) then return
1459 var node = current_node
1460 if node != null then compiler.requirers_of_declarations[key] = node
1463 # Add a declaration in the local-header
1464 # The declaration is ensured to be present once
1465 fun declare_once(s: String)
1467 self.compiler.provide_declaration(s, s)
1468 self.require_declaration(s)
1471 # look for a needed .h and .c file for a given .nit source-file
1472 # FIXME: bad API, parameter should be a `MModule`, not its source-file
1473 fun add_extern(file: String)
1475 file = file.strip_extension(".nit")
1476 var tryfile = file + ".nit.h"
1477 if tryfile.file_exists then
1478 self.declare_once("#include \"{tryfile.basename("")}\"")
1479 self.compiler.files_to_copy.add(tryfile)
1481 tryfile = file + "_nit.h"
1482 if tryfile.file_exists then
1483 self.declare_once("#include \"{tryfile.basename("")}\"")
1484 self.compiler.files_to_copy.add(tryfile)
1487 if self.compiler.seen_extern.has(file) then return
1488 self.compiler.seen_extern.add(file)
1489 tryfile = file + ".nit.c"
1490 if not tryfile.file_exists then
1491 tryfile = file + "_nit.c"
1492 if not tryfile.file_exists then return
1494 var f = new ExternCFile(tryfile.basename(""), "")
1495 self.compiler.extern_bodies.add(f)
1496 self.compiler.files_to_copy.add(tryfile)
1499 # Return a new local runtime_variable initialized with the C expression `cexpr
`.
1500 fun new_expr(cexpr: String, mtype: MType): RuntimeVariable
1502 var res = new_var(mtype)
1503 self.add("{res} = {cexpr};")
1507 # Generate generic abort
1508 # used by aborts, asserts, casts, etc.
1509 fun add_abort(message: String)
1511 self.add("PRINT_ERROR(\"Runtime error: %s\", \"{message.escape_to_c}\");")
1517 if self.current_node != null and self.current_node.location.file != null then
1518 self.add("PRINT_ERROR(\" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
1520 self.add("PRINT_ERROR(\"\\n\");")
1522 self.add("show_backtrace(1);")
1525 # Add a dynamic cast
1526 fun add_cast(value: RuntimeVariable, mtype: MType, tag: String)
1528 var res = self.type_test(value, mtype, tag)
1529 self.add("if (unlikely(!{res})) \{")
1530 var cn = self.class_name_string(value)
1531 self.add("PRINT_ERROR(\"Runtime error: Cast failed. Expected `%s
`, got `%s
`\", \"{mtype.to_s.escape_to_c}\", {cn});")
1536 # Generate a return with the value `s
`
1537 fun ret(s: RuntimeVariable)
1539 self.assign(self.frame.returnvar.as(not null), s)
1540 self.add("goto {self.frame.returnlabel.as(not null)};")
1543 # Compile a statement (if any)
1544 fun stmt(nexpr: nullable AExpr)
1546 if nexpr == null then return
1547 var old = self.current_node
1548 self.current_node = nexpr
1550 self.current_node = old
1553 # Compile an expression an return its result
1554 # `mtype
` is the expected return type, pass null if no specific type is expected.
1555 fun expr(nexpr: AExpr, mtype: nullable MType): RuntimeVariable
1557 var old = self.current_node
1558 self.current_node = nexpr
1559 var res = nexpr.expr(self).as(not null)
1560 if mtype != null then
1561 mtype = self.anchor(mtype)
1562 res = self.autobox(res, mtype)
1564 res = autoadapt(res, nexpr.mtype.as(not null))
1565 var implicit_cast_to = nexpr.implicit_cast_to
1566 if implicit_cast_to != null and not self.compiler.modelbuilder.toolcontext.opt_no_check_autocast.value then
1567 add_cast(res, implicit_cast_to, "auto")
1568 res = autoadapt(res, implicit_cast_to)
1570 self.current_node = old
1574 # Alias for `self.expr
(nexpr
, self.bool_type
)`
1575 fun expr_bool(nexpr: AExpr): RuntimeVariable do return expr(nexpr, bool_type)
1577 # Safely show a debug message on the current node and repeat the message in the C code as a comment
1578 fun debug(message: String)
1580 var node = self.current_node
1581 if node == null then
1582 print "?: {message}"
1586 self.add("/* DEBUG: {message} */")
1590 # A C function associated to a Nit method
1591 # Because of customization, a given Nit method can be compiler more that once
1592 abstract class AbstractRuntimeFunction
1594 type COMPILER: AbstractCompiler
1595 type VISITOR: AbstractCompilerVisitor
1597 # The associated Nit method
1598 var mmethoddef: MMethodDef
1600 # The mangled c name of the runtime_function
1601 # Subclasses should redefine `build_c_name
` instead
1604 var res = self.c_name_cache
1605 if res != null then return res
1606 res = self.build_c_name
1607 self.c_name_cache = res
1611 # Non cached version of `c_name
`
1612 protected fun build_c_name: String is abstract
1614 protected var c_name_cache: nullable String = null is writable
1616 # Implements a call of the runtime_function
1617 # May inline the body or generate a C function call
1618 fun call(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable is abstract
1620 # Generate the code for the `AbstractRuntimeFunction`
1621 # Warning: compile more than once compilation makes CC unhappy
1622 fun compile_to_c(compiler: COMPILER) is abstract
1625 # A runtime variable hold a runtime value in C.
1626 # Runtime variables are associated to Nit local variables and intermediate results in Nit expressions.
1628 # 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.
1629 class RuntimeVariable
1630 # The name of the variable in the C code
1633 # The static type of the variable (as declard in C)
1636 # The current casted type of the variable (as known in Nit)
1637 var mcasttype: MType is writable
1639 # If the variable exaclty a mcasttype?
1640 # false (usual value) means that the variable is a mcasttype or a subtype.
1641 var is_exact: Bool = false is writable
1645 assert not mtype.need_anchor
1646 assert not mcasttype.need_anchor
1649 redef fun to_s do return name
1654 if self.is_exact then
1655 exact_str = " exact"
1660 if self.mtype == self.mcasttype then
1661 type_str = "{mtype}{exact_str}"
1663 type_str = "{mtype}({mcasttype}{exact_str})"
1665 return "<{name}:{type_str}>"
1669 # A frame correspond to a visited property in a `GlobalCompilerVisitor`
1672 type VISITOR: AbstractCompilerVisitor
1674 # The associated visitor
1675 var visitor: VISITOR
1677 # The executed property.
1678 # A Method in case of a call, an attribute in case of a default initialization.
1679 var mpropdef: MPropDef
1681 # The static type of the receiver
1682 var receiver: MClassType
1684 # Arguments of the method (the first is the receiver)
1685 var arguments: Array[RuntimeVariable]
1687 # The runtime_variable associated to the return (in a function)
1688 var returnvar: nullable RuntimeVariable = null is writable
1690 # The label at the end of the property
1691 var returnlabel: nullable String = null is writable
1695 # Return the C type associated to a given Nit static type
1696 fun ctype: String do return "val*"
1698 # C type outside of the compiler code and in boxes
1699 fun ctype_extern: String do return "val*"
1701 # Short name of the `ctype
` to use in unions
1702 fun ctypename: String do return "val"
1704 # Return the name of the C structure associated to a Nit live type
1705 fun c_name: String is abstract
1706 protected var c_name_cache: nullable String is protected writable
1709 redef class MClassType
1712 var res = self.c_name_cache
1713 if res != null then return res
1714 res = "{mclass.intro_mmodule.c_name}__{mclass.name.to_cmangle}"
1715 self.c_name_cache = res
1719 redef fun ctype: String
1721 if mclass.name == "Int" then
1723 else if mclass.name == "Bool" then
1725 else if mclass.name == "Char" then
1727 else if mclass.name == "Float" then
1729 else if mclass.name == "NativeString" then
1731 else if mclass.name == "NativeArray" then
1738 redef fun ctype_extern: String
1740 if mclass.kind == extern_kind then
1747 redef fun ctypename: String
1749 if mclass.name == "Int" then
1751 else if mclass.name == "Bool" then
1753 else if mclass.name == "Char" then
1755 else if mclass.name == "Float" then
1757 else if mclass.name == "NativeString" then
1759 else if mclass.name == "NativeArray" then
1760 #return "{self.arguments.first.ctype}*"
1768 redef class MGenericType
1771 var res = self.c_name_cache
1772 if res != null then return res
1774 for t in self.arguments do
1775 res = res + t.c_name
1777 self.c_name_cache = res
1782 redef class MParameterType
1785 var res = self.c_name_cache
1786 if res != null then return res
1787 res = "{self.mclass.c_name}_FT{self.rank}"
1788 self.c_name_cache = res
1793 redef class MVirtualType
1796 var res = self.c_name_cache
1797 if res != null then return res
1798 res = "{self.mproperty.intro.mclassdef.mclass.c_name}_VT{self.mproperty.name}"
1799 self.c_name_cache = res
1804 redef class MNullableType
1807 var res = self.c_name_cache
1808 if res != null then return res
1809 res = "nullable_{self.mtype.c_name}"
1810 self.c_name_cache = res
1816 # Return the name of the C structure associated to a Nit class
1817 fun c_name: String do
1818 var res = self.c_name_cache
1819 if res != null then return res
1820 res = "{intro_mmodule.c_name}__{name.to_cmangle}"
1821 self.c_name_cache = res
1824 private var c_name_cache: nullable String
1827 redef class MProperty
1828 fun c_name: String do
1829 var res = self.c_name_cache
1830 if res != null then return res
1831 res = "{self.intro.c_name}"
1832 self.c_name_cache = res
1835 private var c_name_cache: nullable String
1838 redef class MPropDef
1839 type VISITOR: AbstractCompilerVisitor
1841 private var c_name_cache: nullable String
1843 # The mangled name associated to the property
1846 var res = self.c_name_cache
1847 if res != null then return res
1848 res = "{self.mclassdef.mmodule.c_name}__{self.mclassdef.mclass.name.to_cmangle}__{self.mproperty.name.to_cmangle}"
1849 self.c_name_cache = res
1854 redef class MMethodDef
1855 # Can the body be inlined?
1856 fun can_inline(v: VISITOR): Bool
1858 if is_abstract then return true
1859 var modelbuilder = v.compiler.modelbuilder
1860 if modelbuilder.mpropdef2npropdef.has_key(self) then
1861 var npropdef = modelbuilder.mpropdef2npropdef[self]
1862 return npropdef.can_inline
1863 else if self.mproperty.is_root_init then
1864 # Automatic free init is always inlined since it is empty or contains only attribtes assigments
1871 # Inline the body in another visitor
1872 fun compile_inside_to_c(v: VISITOR, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
1874 var modelbuilder = v.compiler.modelbuilder
1875 var val = constant_value
1876 if modelbuilder.mpropdef2npropdef.has_key(self) then
1877 var npropdef = modelbuilder.mpropdef2npropdef[self]
1878 var oldnode = v.current_node
1879 v.current_node = npropdef
1880 self.compile_parameter_check(v, arguments)
1881 npropdef.compile_to_c(v, self, arguments)
1882 v.current_node = oldnode
1883 else if self.mproperty.is_root_init then
1884 var nclassdef = modelbuilder.mclassdef2nclassdef[self.mclassdef]
1885 var oldnode = v.current_node
1886 v.current_node = nclassdef
1887 self.compile_parameter_check(v, arguments)
1888 nclassdef.compile_to_c(v, self, arguments)
1889 v.current_node = oldnode
1890 else if val != null then
1891 v.ret(v.value_instance(val))
1898 # Generate type checks in the C code to check covariant parameters
1899 fun compile_parameter_check(v: VISITOR, arguments: Array[RuntimeVariable])
1901 if v.compiler.modelbuilder.toolcontext.opt_no_check_covariance.value then return
1903 for i in [0..msignature.arity[ do
1904 # skip test for vararg since the array is instantiated with the correct polymorphic type
1905 if msignature.vararg_rank == i then continue
1907 # skip if the cast is not required
1908 var origmtype = self.mproperty.intro.msignature.mparameters[i].mtype
1909 if not origmtype.need_anchor then continue
1911 # get the parameter type
1912 var mtype = self.msignature.mparameters[i].mtype
1915 # note that v decides if and how to implements the cast
1916 v.add("/* Covariant cast for argument {i} ({self.msignature.mparameters[i].name}) {arguments[i+1].inspect} isa {mtype} */")
1917 v.add_cast(arguments[i+1], mtype, "covariance")
1924 redef class APropdef
1925 fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
1927 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
1928 debug("Not yet implemented")
1931 fun can_inline: Bool do return true
1934 redef class AMethPropdef
1935 redef fun compile_to_c(v, mpropdef, arguments)
1937 if mpropdef.is_abstract then
1938 var cn = v.class_name_string(arguments.first)
1939 v.add("PRINT_ERROR(\"Runtime error: Abstract method `%s
` called on `%s
`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1944 # Call the implicit super-init
1945 var auto_super_inits = self.auto_super_inits
1946 if auto_super_inits != null then
1947 var args = [arguments.first]
1948 for auto_super_init in auto_super_inits do
1949 assert auto_super_init.mproperty != mpropdef.mproperty
1951 for i in [0..auto_super_init.msignature.arity+1[ do
1952 args.add(arguments[i])
1954 assert auto_super_init.mproperty != mpropdef.mproperty
1955 v.compile_callsite(auto_super_init, args)
1958 if auto_super_call then
1959 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
1962 # Try special compilation
1963 if mpropdef.is_intern then
1964 if compile_intern_to_c(v, mpropdef, arguments) then return
1965 else if mpropdef.is_extern then
1966 if mpropdef.mproperty.is_init then
1967 if compile_externinit_to_c(v, mpropdef, arguments) then return
1969 if compile_externmeth_to_c(v, mpropdef, arguments) then return
1973 # Compile block if any
1974 var n_block = n_block
1975 if n_block != null then
1976 for i in [0..mpropdef.msignature.arity[ do
1977 var variable = self.n_signature.n_params[i].variable.as(not null)
1978 v.assign(v.variable(variable), arguments[i+1])
1985 var cn = v.class_name_string(arguments.first)
1986 v.add("PRINT_ERROR(\"Runtime error: uncompiled method `%s
` called on `%s
`. NOT YET IMPLEMENTED\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
1990 redef fun can_inline
1992 if self.auto_super_inits != null then return false
1993 var nblock = self.n_block
1994 if nblock == null then return true
1995 if (mpropdef.mproperty.name == "==" or mpropdef.mproperty.name == "!=") and mpropdef.mclassdef.mclass.name == "Object" then return true
1996 if nblock isa ABlockExpr and nblock.n_expr.length == 0 then return true
2000 fun compile_intern_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2002 var pname = mpropdef.mproperty.name
2003 var cname = mpropdef.mclassdef.mclass.name
2004 var ret = mpropdef.msignature.return_mtype
2006 ret = v.resolve_for(ret, arguments.first)
2008 if pname != "==" and pname != "!=" then
2009 v.adapt_signature(mpropdef, arguments)
2010 v.unbox_signature_extern(mpropdef, arguments)
2012 if cname == "Int" then
2013 if pname == "output" then
2014 v.add("printf(\"%ld\\n\", {arguments.first});")
2016 else if pname == "object_id" then
2017 v.ret(arguments.first)
2019 else if pname == "+" then
2020 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2022 else if pname == "-" then
2023 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2025 else if pname == "unary -" then
2026 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2028 else if pname == "*" then
2029 v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
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 == "lshift" then
2038 v.ret(v.new_expr("{arguments[0]} << {arguments[1]}", ret.as(not null)))
2040 else if pname == "rshift" then
2041 v.ret(v.new_expr("{arguments[0]} >> {arguments[1]}", ret.as(not null)))
2043 else if pname == "==" then
2044 v.ret(v.equal_test(arguments[0], arguments[1]))
2046 else if pname == "!=" then
2047 var res = v.equal_test(arguments[0], arguments[1])
2048 v.ret(v.new_expr("!{res}", ret.as(not null)))
2050 else if pname == "<" then
2051 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2053 else if pname == ">" then
2054 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2056 else if pname == "<=" then
2057 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2059 else if pname == ">=" then
2060 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2062 else if pname == "to_f" then
2063 v.ret(v.new_expr("(double){arguments[0]}", ret.as(not null)))
2065 else if pname == "ascii" then
2066 v.ret(v.new_expr("{arguments[0]}", ret.as(not null)))
2069 else if cname == "Char" then
2070 if pname == "output" then
2071 v.add("printf(\"%c\", {arguments.first});")
2073 else if pname == "object_id" then
2074 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2076 else if pname == "successor" then
2077 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2079 else if pname == "predecessor" then
2080 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2082 else if pname == "==" then
2083 v.ret(v.equal_test(arguments[0], arguments[1]))
2085 else if pname == "!=" then
2086 var res = v.equal_test(arguments[0], arguments[1])
2087 v.ret(v.new_expr("!{res}", ret.as(not null)))
2089 else if pname == "<" then
2090 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2092 else if pname == ">" then
2093 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2095 else if pname == "<=" then
2096 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2098 else if pname == ">=" then
2099 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2101 else if pname == "to_i" then
2102 v.ret(v.new_expr("{arguments[0]}-'0'", ret.as(not null)))
2104 else if pname == "ascii" then
2105 v.ret(v.new_expr("(unsigned char){arguments[0]}", ret.as(not null)))
2108 else if cname == "Bool" then
2109 if pname == "output" then
2110 v.add("printf({arguments.first}?\"true\\n\":\"false\\n\");")
2112 else if pname == "object_id" then
2113 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2115 else if pname == "==" then
2116 v.ret(v.equal_test(arguments[0], arguments[1]))
2118 else if pname == "!=" then
2119 var res = v.equal_test(arguments[0], arguments[1])
2120 v.ret(v.new_expr("!{res}", ret.as(not null)))
2123 else if cname == "Float" then
2124 if pname == "output" then
2125 v.add("printf(\"%f\\n\", {arguments.first});")
2127 else if pname == "object_id" then
2128 v.ret(v.new_expr("(double){arguments.first}", ret.as(not null)))
2130 else if pname == "+" then
2131 v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
2133 else if pname == "-" then
2134 v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
2136 else if pname == "unary -" then
2137 v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
2139 else if pname == "succ" then
2140 v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
2142 else if pname == "prec" then
2143 v.ret(v.new_expr("{arguments[0]}-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 == "/" then
2149 v.ret(v.new_expr("{arguments[0]} / {arguments[1]}", ret.as(not null)))
2151 else if pname == "==" then
2152 v.ret(v.equal_test(arguments[0], arguments[1]))
2154 else if pname == "!=" then
2155 var res = v.equal_test(arguments[0], arguments[1])
2156 v.ret(v.new_expr("!{res}", ret.as(not null)))
2158 else if pname == "<" then
2159 v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
2161 else if pname == ">" then
2162 v.ret(v.new_expr("{arguments[0]} > {arguments[1]}", ret.as(not null)))
2164 else if pname == "<=" then
2165 v.ret(v.new_expr("{arguments[0]} <= {arguments[1]}", ret.as(not null)))
2167 else if pname == ">=" then
2168 v.ret(v.new_expr("{arguments[0]} >= {arguments[1]}", ret.as(not null)))
2170 else if pname == "to_i" then
2171 v.ret(v.new_expr("(long){arguments[0]}", ret.as(not null)))
2174 else if cname == "NativeString" then
2175 if pname == "[]" then
2176 v.ret(v.new_expr("{arguments[0]}[{arguments[1]}]", ret.as(not null)))
2178 else if pname == "[]=" then
2179 v.add("{arguments[0]}[{arguments[1]}]={arguments[2]};")
2181 else if pname == "copy_to" then
2182 v.add("memmove({arguments[1]}+{arguments[4]},{arguments[0]}+{arguments[3]},{arguments[2]});")
2184 else if pname == "atoi" then
2185 v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
2187 else if pname == "new" then
2188 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2191 else if cname == "NativeArray" then
2192 v.native_array_def(pname, ret, arguments)
2195 if pname == "exit" then
2196 v.add("exit({arguments[1]});")
2198 else if pname == "sys" then
2199 v.ret(v.new_expr("glob_sys", ret.as(not null)))
2201 else if pname == "calloc_string" then
2202 v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
2204 else if pname == "calloc_array" then
2205 v.calloc_array(ret.as(not null), arguments)
2207 else if pname == "object_id" then
2208 v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
2210 else if pname == "is_same_type" then
2211 v.ret(v.is_same_type_test(arguments[0], arguments[1]))
2213 else if pname == "is_same_instance" then
2214 v.ret(v.equal_test(arguments[0], arguments[1]))
2216 else if pname == "output_class_name" then
2217 var nat = v.class_name_string(arguments.first)
2218 v.add("printf(\"%s\\n\", {nat});")
2220 else if pname == "native_class_name" then
2221 var nat = v.class_name_string(arguments.first)
2222 v.ret(v.new_expr("(char*){nat}", ret.as(not null)))
2224 else if pname == "force_garbage_collection" then
2225 v.add("nit_gcollect();")
2227 else if pname == "native_argc" then
2228 v.ret(v.new_expr("glob_argc", ret.as(not null)))
2230 else if pname == "native_argv" then
2231 v.ret(v.new_expr("glob_argv[{arguments[1]}]", ret.as(not null)))
2237 # Compile an extern method
2238 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2239 fun compile_externmeth_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2242 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2244 externname = at.arg_as_string(v.compiler.modelbuilder)
2245 if externname == null then return false
2249 if location.file != null then
2250 var file = location.file.filename
2253 var res: nullable RuntimeVariable = null
2254 var ret = mpropdef.msignature.return_mtype
2256 ret = v.resolve_for(ret, arguments.first)
2257 res = v.new_var_extern(ret)
2259 v.adapt_signature(mpropdef, arguments)
2260 v.unbox_signature_extern(mpropdef, arguments)
2263 v.add("{externname}({arguments.join(", ")});")
2265 v.add("{res} = {externname}({arguments.join(", ")});")
2266 res = v.box_extern(res, ret.as(not null))
2272 # Compile an extern factory
2273 # Return `true` if the compilation was successful, `false` if a fall-back is needed
2274 fun compile_externinit_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable]): Bool
2277 var at = self.get_single_annotation("extern", v.compiler.modelbuilder)
2279 externname = at.arg_as_string(v.compiler.modelbuilder)
2280 if externname == null then return false
2284 if location.file != null then
2285 var file = location.file.filename
2288 v.adapt_signature(mpropdef, arguments)
2289 v.unbox_signature_extern(mpropdef, arguments)
2290 var ret = arguments.first.mtype
2291 var res = v.new_var_extern(ret)
2295 v.add("{res} = {externname}({arguments.join(", ")});")
2296 res = v.box_extern(res, ret)
2302 redef class AAttrPropdef
2303 redef fun compile_to_c(v, mpropdef, arguments)
2305 if mpropdef == mreadpropdef then
2306 assert arguments.length == 1
2307 var recv = arguments.first
2311 var ret = self.mpropdef.static_mtype
2312 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2313 var guard = self.mlazypropdef.mproperty
2315 set = v.isset_attribute(self.mpropdef.mproperty, recv)
2317 set = v.read_attribute(guard, recv)
2319 v.add("if(likely({set})) \{")
2320 res = v.read_attribute(self.mpropdef.mproperty, recv)
2323 var value = evaluate_expr(v, recv)
2325 v.assign(res, value)
2327 var true_v = v.new_expr("1", v.bool_type)
2328 v.write_attribute(guard, arguments.first, true_v)
2332 res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
2334 v.assign(v.frame.returnvar.as(not null), res)
2335 else if mpropdef == mwritepropdef then
2336 assert arguments.length == 2
2337 v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
2339 var ret = self.mpropdef.static_mtype
2340 var useiset = ret.ctype == "val*" and not ret isa MNullableType
2342 v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.new_expr("1", v.bool_type))
2350 fun init_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2352 if has_value and not is_lazy then evaluate_expr(v, recv)
2355 # Evaluate, store and return the default value of the attribute
2356 private fun evaluate_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable): RuntimeVariable
2358 var oldnode = v.current_node
2359 v.current_node = self
2360 var old_frame = v.frame
2361 var frame = new Frame(v, self.mpropdef.as(not null), recv.mcasttype.as(MClassType), [recv])
2365 var mtype = self.mpropdef.static_mtype
2366 assert mtype != null
2368 var nexpr = self.n_expr
2369 var nblock = self.n_block
2370 if nexpr != null then
2371 value = v.expr(nexpr, mtype)
2372 else if nblock != null then
2373 value = v.new_var(mtype)
2374 frame.returnvar = value
2375 frame.returnlabel = v.get_name("RET_LABEL")
2378 v.add("{frame.returnlabel.as(not null)}:(void)0;")
2384 v.write_attribute(self.mpropdef.mproperty, recv, value)
2387 v.current_node = oldnode
2392 fun check_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
2394 var nexpr = self.n_expr
2395 if nexpr != null then return
2397 var oldnode = v.current_node
2398 v.current_node = self
2399 var old_frame = v.frame
2400 var frame = new Frame(v, self.mpropdef.as(not null), recv.mtype.as(MClassType), [recv])
2402 # Force read to check the initialization
2403 v.read_attribute(self.mpropdef.mproperty, recv)
2405 v.current_node = oldnode
2409 redef class AClassdef
2410 private fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
2412 if mpropdef == self.mfree_init then
2413 assert mpropdef.mproperty.is_root_init
2414 assert arguments.length == 1
2415 if not mpropdef.is_intro then
2416 v.supercall(mpropdef, arguments.first.mtype.as(MClassType), arguments)
2426 # Try to compile self as an expression
2427 # Do not call this method directly, use `v
.expr
` instead
2428 private fun expr(v: AbstractCompilerVisitor): nullable RuntimeVariable
2430 v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
2431 var mtype = self.mtype
2432 if mtype == null then
2435 var res = v.new_var(mtype)
2436 v.add("/* {res} = NOT YET {class_name} */")
2441 # Try to compile self as a statement
2442 # Do not call this method directly, use `v
.stmt
` instead
2443 private fun stmt(v: AbstractCompilerVisitor)
2449 redef class ABlockExpr
2452 for e in self.n_expr do v.stmt(e)
2456 var last = self.n_expr.last
2457 for e in self.n_expr do
2458 if e == last then break
2461 return v.expr(last, null)
2465 redef class AVardeclExpr
2468 var variable = self.variable.as(not null)
2469 var ne = self.n_expr
2471 var i = v.expr(ne, variable.declared_type)
2472 v.assign(v.variable(variable), i)
2477 redef class AVarExpr
2480 var res = v.variable(self.variable.as(not null))
2481 var mtype = self.mtype.as(not null)
2482 return v.autoadapt(res, mtype)
2486 redef class AVarAssignExpr
2489 var variable = self.variable.as(not null)
2490 var i = v.expr(self.n_value, variable.declared_type)
2491 v.assign(v.variable(variable), i)
2496 redef class AVarReassignExpr
2499 var variable = self.variable.as(not null)
2500 var vari = v.variable(variable)
2501 var value = v.expr(self.n_value, variable.declared_type)
2502 var res = v.compile_callsite(self.reassign_callsite.as(not null), [vari, value])
2504 v.assign(v.variable(variable), res)
2508 redef class ASelfExpr
2509 redef fun expr(v) do return v.frame.arguments.first
2512 redef class AEscapeExpr
2513 redef fun stmt(v) do v.add("goto BREAK_{v.escapemark_name(self.escapemark)};")
2516 redef class AReturnExpr
2519 var nexpr = self.n_expr
2520 if nexpr != null then
2521 var returnvar = v.frame.returnvar.as(not null)
2522 var i = v.expr(nexpr, returnvar.mtype)
2523 v.assign(returnvar, i)
2525 v.add("goto {v.frame.returnlabel.as(not null)};")
2529 redef class AAbortExpr
2530 redef fun stmt(v) do v.add_abort("Aborted")
2536 var cond = v.expr_bool(self.n_expr)
2537 v.add("if ({cond})\{")
2546 var res = v.new_var(self.mtype.as(not null))
2547 var cond = v.expr_bool(self.n_expr)
2548 v.add("if ({cond})\{")
2549 v.assign(res, v.expr(self.n_then.as(not null), null))
2551 v.assign(res, v.expr(self.n_else.as(not null), null))
2557 redef class AIfexprExpr
2560 var res = v.new_var(self.mtype.as(not null))
2561 var cond = v.expr_bool(self.n_expr)
2562 v.add("if ({cond})\{")
2563 v.assign(res, v.expr(self.n_then, null))
2565 v.assign(res, v.expr(self.n_else, null))
2574 v.stmt(self.n_block)
2575 v.add_escape_label(break_mark)
2579 redef class AWhileExpr
2583 var cond = v.expr_bool(self.n_expr)
2584 v.add("if (!{cond}) break;")
2585 v.stmt(self.n_block)
2586 v.add_escape_label(continue_mark)
2588 v.add_escape_label(break_mark)
2592 redef class ALoopExpr
2596 v.stmt(self.n_block)
2597 v.add_escape_label(continue_mark)
2599 v.add_escape_label(break_mark)
2603 redef class AForExpr
2606 var cl = v.expr(self.n_expr, null)
2607 var it_meth = self.method_iterator
2608 assert it_meth != null
2609 var it = v.compile_callsite(it_meth, [cl])
2612 var isok_meth = self.method_is_ok
2613 assert isok_meth != null
2614 var ok = v.compile_callsite(isok_meth, [it])
2616 v.add("if(!{ok}) break;")
2617 if self.variables.length == 1 then
2618 var item_meth = self.method_item
2619 assert item_meth != null
2620 var i = v.compile_callsite(item_meth, [it])
2622 v.assign(v.variable(variables.first), i)
2623 else if self.variables.length == 2 then
2624 var key_meth = self.method_key
2625 assert key_meth != null
2626 var i = v.compile_callsite(key_meth, [it])
2628 v.assign(v.variable(variables[0]), i)
2629 var item_meth = self.method_item
2630 assert item_meth != null
2631 i = v.compile_callsite(item_meth, [it])
2633 v.assign(v.variable(variables[1]), i)
2637 v.stmt(self.n_block)
2638 v.add_escape_label(continue_mark)
2639 var next_meth = self.method_next
2640 assert next_meth != null
2641 v.compile_callsite(next_meth, [it])
2643 v.add_escape_label(break_mark)
2645 var method_finish = self.method_finish
2646 if method_finish != null then
2647 # TODO: Find a way to call this also in long escape (e.g. return)
2648 v.compile_callsite(method_finish, [it])
2653 redef class AAssertExpr
2656 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return
2658 var cond = v.expr_bool(self.n_expr)
2659 v.add("if (unlikely(!{cond})) \{")
2663 v.add_abort("Assert '{nid.text}' failed")
2665 v.add_abort("Assert failed")
2674 var res = v.new_var(self.mtype.as(not null))
2675 var i1 = v.expr_bool(self.n_expr)
2676 v.add("if ({i1}) \{")
2679 var i2 = v.expr_bool(self.n_expr2)
2680 v.add("{res} = {i2};")
2686 redef class AImpliesExpr
2689 var res = v.new_var(self.mtype.as(not null))
2690 var i1 = v.expr_bool(self.n_expr)
2691 v.add("if (!{i1}) \{")
2694 var i2 = v.expr_bool(self.n_expr2)
2695 v.add("{res} = {i2};")
2701 redef class AAndExpr
2704 var res = v.new_var(self.mtype.as(not null))
2705 var i1 = v.expr_bool(self.n_expr)
2706 v.add("if (!{i1}) \{")
2709 var i2 = v.expr_bool(self.n_expr2)
2710 v.add("{res} = {i2};")
2716 redef class ANotExpr
2719 var cond = v.expr_bool(self.n_expr)
2720 return v.new_expr("!{cond}", self.mtype.as(not null))
2724 redef class AOrElseExpr
2727 var res = v.new_var(self.mtype.as(not null))
2728 var i1 = v.expr(self.n_expr, null)
2729 v.add("if ({i1}!=NULL) \{")
2732 var i2 = v.expr(self.n_expr2, null)
2739 redef class AIntExpr
2740 redef fun expr(v) do return v.new_expr("{self.value.to_s}", self.mtype.as(not null))
2743 redef class AFloatExpr
2744 redef fun expr(v) do return v.new_expr("{self.n_float.text}", self.mtype.as(not null)) # FIXME use value, not n_float
2747 redef class ACharExpr
2748 redef fun expr(v) do return v.new_expr("'{self.value.to_s.escape_to_c}'", self.mtype.as(not null))
2751 redef class AArrayExpr
2754 var mtype = self.mtype.as(MClassType).arguments.first
2755 var array = new Array[RuntimeVariable]
2756 for nexpr in self.n_exprs.n_exprs do
2757 var i = v.expr(nexpr, mtype)
2760 return v.array_instance(array, mtype)
2764 redef class AStringFormExpr
2765 redef fun expr(v) do return v.string_instance(self.value.as(not null))
2768 redef class ASuperstringExpr
2771 var array = new Array[RuntimeVariable]
2772 for ne in self.n_exprs do
2773 if ne isa AStringFormExpr and ne.value == "" then continue # skip empty sub-strings
2774 var i = v.expr(ne, null)
2777 var a = v.array_instance(array, v.object_type)
2778 var res = v.send(v.get_property("to_s", a.mtype), [a])
2783 redef class ACrangeExpr
2786 var i1 = v.expr(self.n_expr, null)
2787 var i2 = v.expr(self.n_expr2, null)
2788 var mtype = self.mtype.as(MClassType)
2789 var res = v.init_instance(mtype)
2790 v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
2795 redef class AOrangeExpr
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 ATrueExpr
2808 redef fun expr(v) do return v.new_expr("1", self.mtype.as(not null))
2811 redef class AFalseExpr
2812 redef fun expr(v) do return v.new_expr("0", self.mtype.as(not null))
2815 redef class ANullExpr
2816 redef fun expr(v) do return v.new_expr("NULL", self.mtype.as(not null))
2819 redef class AIsaExpr
2822 var i = v.expr(self.n_expr, null)
2823 return v.type_test(i, self.cast_type.as(not null), "isa")
2827 redef class AAsCastExpr
2830 var i = v.expr(self.n_expr, null)
2831 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2833 v.add_cast(i, self.mtype.as(not null), "as")
2838 redef class AAsNotnullExpr
2841 var i = v.expr(self.n_expr, null)
2842 if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
2844 if i.mtype.ctype != "val*" then return i
2846 v.add("if (unlikely({i} == NULL)) \{")
2847 v.add_abort("Cast failed")
2853 redef class AParExpr
2854 redef fun expr(v) do return v.expr(self.n_expr, null)
2857 redef class AOnceExpr
2860 var mtype = self.mtype.as(not null)
2861 var name = v.get_name("varonce")
2862 var guard = v.get_name(name + "_guard")
2863 v.add_decl("static {mtype.ctype} {name};")
2864 v.add_decl("static int {guard};")
2865 var res = v.new_var(mtype)
2866 v.add("if ({guard}) \{")
2867 v.add("{res} = {name};")
2869 var i = v.expr(self.n_expr, mtype)
2870 v.add("{res} = {i};")
2871 v.add("{name} = {res};")
2872 v.add("{guard} = 1;")
2878 redef class ASendExpr
2881 var recv = v.expr(self.n_expr, null)
2882 var callsite = self.callsite.as(not null)
2883 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2884 return v.compile_callsite(callsite, args)
2888 redef class ASendReassignFormExpr
2891 var recv = v.expr(self.n_expr, null)
2892 var callsite = self.callsite.as(not null)
2893 var args = v.varargize(callsite.mpropdef, recv, self.raw_arguments)
2895 var value = v.expr(self.n_value, null)
2897 var left = v.compile_callsite(callsite, args)
2900 var res = v.compile_callsite(self.reassign_callsite.as(not null), [left, value])
2904 v.compile_callsite(self.write_callsite.as(not null), args)
2908 redef class ASuperExpr
2911 var recv = v.frame.arguments.first
2913 var callsite = self.callsite
2914 if callsite != null then
2915 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2917 # Add additional arguments for the super init call
2918 if args.length == 1 then
2919 for i in [0..callsite.msignature.arity[ do
2920 args.add(v.frame.arguments[i+1])
2924 var res = v.compile_callsite(callsite, args)
2928 var mpropdef = self.mpropdef.as(not null)
2929 var args = v.varargize(mpropdef, recv, self.n_args.n_exprs)
2930 if args.length == 1 then
2931 args = v.frame.arguments
2934 # stantard call-next-method
2935 return v.supercall(mpropdef, recv.mtype.as(MClassType), args)
2939 redef class ANewExpr
2942 var mtype = self.recvtype
2943 assert mtype != null
2945 var ctype = mtype.ctype
2946 if mtype.mclass.name == "NativeArray" then
2947 assert self.n_args.n_exprs.length == 1
2948 var l = v.expr(self.n_args.n_exprs.first, null)
2949 assert mtype isa MGenericType
2950 var elttype = mtype.arguments.first
2951 return v.native_array_instance(elttype, l)
2952 else if ctype == "val*" then
2953 recv = v.init_instance(mtype)
2954 else if ctype == "char*" then
2955 recv = v.new_expr("NULL/*special!*/", mtype)
2957 recv = v.new_expr("({ctype})0/*special!*/", mtype)
2960 var callsite = self.callsite.as(not null)
2961 var args = v.varargize(callsite.mpropdef, recv, self.n_args.n_exprs)
2962 var res2 = v.compile_callsite(callsite, args)
2963 if res2 != null then
2964 #self.debug("got {res2} from {mproperty}. drop {recv}")
2971 redef class AAttrExpr
2974 var recv = v.expr(self.n_expr, null)
2975 var mproperty = self.mproperty.as(not null)
2976 return v.read_attribute(mproperty, recv)
2980 redef class AAttrAssignExpr
2983 var recv = v.expr(self.n_expr, null)
2984 var i = v.expr(self.n_value, null)
2985 var mproperty = self.mproperty.as(not null)
2986 v.write_attribute(mproperty, recv, i)
2991 redef class AAttrReassignExpr
2994 var recv = v.expr(self.n_expr, null)
2995 var value = v.expr(self.n_value, null)
2996 var mproperty = self.mproperty.as(not null)
2997 var attr = v.read_attribute(mproperty, recv)
2998 var res = v.compile_callsite(self.reassign_callsite.as(not null), [attr, value])
3000 v.write_attribute(mproperty, recv, res)
3004 redef class AIssetAttrExpr
3007 var recv = v.expr(self.n_expr, null)
3008 var mproperty = self.mproperty.as(not null)
3009 return v.isset_attribute(mproperty, recv)
3013 redef class ADebugTypeExpr
3022 redef class Array[E]
3023 # Return a new `Array` with the elements only contened in self and not in `o
`
3024 fun -(o: Array[E]): Array[E] do
3025 var res = new Array[E]
3026 for e in self do if not o.has(e) then res.add(e)
3032 # Return the name of the global C identifier associated to `self`.
3033 # This name is used to prefix files and other C identifiers associated with `self`.
3034 var c_name: String is lazy do
3037 if g != null and g.mproject.name != name then
3038 res = g.mproject.name.to_cmangle + "__" + name.to_cmangle
3040 res = name.to_cmangle
3045 # All `MProperty` associated to all `MClassDef` of `mclass
`
3046 fun properties(mclass: MClass): Set[MProperty] do
3047 if not self.properties_cache.has_key(mclass) then
3048 var properties = new HashSet[MProperty]
3049 var parents = new Array[MClass]
3050 if self.flatten_mclass_hierarchy.has(mclass) then
3051 parents.add_all(mclass.in_hierarchy(self).direct_greaters)
3053 for parent in parents do
3054 properties.add_all(self.properties(parent))
3056 for mclassdef in mclass.mclassdefs do
3057 if not self.in_importation <= mclassdef.mmodule then continue
3058 for mprop in mclassdef.intro_mproperties do
3059 properties.add(mprop)
3062 self.properties_cache[mclass] = properties
3064 return properties_cache[mclass]
3066 private var properties_cache: Map[MClass, Set[MProperty]] = new HashMap[MClass, Set[MProperty]]
3068 # Write FFI and nitni results to file
3069 fun finalize_ffi(c: AbstractCompiler) do end
3071 # Give requided addinional system libraries (as given to LD_LIBS)
3072 # Note: can return null instead of an empty set
3073 fun collect_linker_libs: nullable Set[String] do return null
3076 # Create a tool context to handle options and paths
3077 var toolcontext = new ToolContext
3079 toolcontext.tooldescription = "Usage: nitg [OPTION]... file.nit...\nCompiles Nit programs."
3081 # We do not add other options, so process them now!
3082 toolcontext.process_options(args)
3084 # We need a model to collect stufs
3085 var model = new Model
3086 # An a model builder to parse files
3087 var modelbuilder = new ModelBuilder(model, toolcontext)
3089 var arguments = toolcontext.option_context.rest
3090 if arguments.length > 1 and toolcontext.opt_output.value != null then
3091 print "Error: --output needs a single source file. Do you prefer --dir?"
3095 # Here we load an process all modules passed on the command line
3096 var mmodules = modelbuilder.parse(arguments)
3098 if mmodules.is_empty then return
3099 modelbuilder.run_phases
3101 for mmodule in mmodules do
3102 toolcontext.info("*** PROCESS {mmodule} ***", 1)
3104 toolcontext.run_global_phases(ms)