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package com.seaofnodes.simple;
import com.seaofnodes.simple.parser.Parser;
import com.seaofnodes.simple.codegen.*;
import com.seaofnodes.simple.node.*;
import com.seaofnodes.simple.type.TypeInteger;
import com.seaofnodes.simple.util.Ary;
import java.io.IOException;
import java.nio.file.*;
import org.junit.Test;
import static org.junit.Assert.*;
public class SelectiveLoadingTest {
@Test public void testSharedConstantsInSeparateObjects() throws Exception {
Path root = library("shared-constants-");
Path src = Files.createDirectory(root.resolve("src"));
Path obj = Files.createDirectory(root.resolve("obj"));
write(src,"Lib","val sum_noInline = { int n -> Left.at_noInline(n)+Right.at_noInline(n); };");
write(src,"Lib/Left","val at_noInline = { int n -> n+1000000000000; };");
write(src,"Lib/Right","val at_noInline = { int n -> n*2+1000000000000; };");
// Both bodies share a constant in the compiling graph. Each saved
// object must contain it without pulling in the other unit's body.
new CodeGen(src.toString(),obj.toString(),null,"Lib",null,123,true,TypeInteger.BOT)
.driver(TestC.CPU_PORT,TestC.CALL_CONVENTION,false,false);
CodeGen code = new CodeGen(null,null,new Ary<>(new String[]{obj.toString()}),
"Use","return Lib.sum_noInline(arg);",123,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertNull(code._compunits.get("Lib/Left")._src);
assertNull(code._compunits.get("Lib/Right")._src);
assertEquals("2000000000000",Eval2.eval(code,0));
assertEquals("2000000000003",Eval2.eval(code,1));
}
@Test public void testUnreachableImportIsNotARoot() throws Exception {
Path root = library("dead-import-");
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"Unused","val run_noInline = { int n -> n+1; };");
for( long seed : new long[]{1,123,987654321} ) {
CodeGen code = new CodeGen(null,root.toString(),paths,"Main","""
val _false_noInline = { -> false; };
if( _false_noInline() ) return Unused.run_noInline(arg);
return 7;
""",seed,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
CompUnit unused = code._compunits.get("Unused");
assertNotNull("Parsing loaded the declaration",unused);
for( FunNode fun : code._linker )
assertTrue(fun==null || fun.isDead() || fun._compunit!=unused);
assertEquals("7",Eval2.eval(code,0));
}
}
private static Path library(String prefix) throws IOException {
Path base = Files.createDirectories(Path.of("build/objs/selective"));
return Files.createTempDirectory(base,prefix);
}
@Test public void testImportedCallbackChain() throws Exception {
Path root = library("callback-chain-");
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"L0","val relay_noInline = { {int->int} f -> f; };");
for( int i = 1; i<6; i++ )
object(root,paths,"L"+i,"val relay_noInline = { {int->int} f -> L"+(i-1)+".relay_noInline(f); };");
for( long seed : new long[]{1,123,987654321} ) {
CodeGen code = new CodeGen(null,root.toString(),paths,"Main","""
val _increment_noInline = { int n -> n+1; };
val _decrement_noInline = { int n -> n-1; };
val f = L5.relay_noInline(arg ? _increment_noInline : _decrement_noInline);
return f(41);
""",seed,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertNotNull(function(code,"relay_noInline").summary());
assertEquals("42",Eval2.eval(code,1));
assertEquals("40",Eval2.eval(code,0));
}
}
@Test public void testImportedCallbackReturn() throws Exception {
Path root = library("callback-return-");
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"Relay","val relay = { {int->int} f -> f; };");
for( long seed : new long[]{1,123,987654321} ) {
CodeGen code = new CodeGen(null,root.toString(),paths,"Main","""
val _increment_noInline = { int n -> n+1; };
val f = Relay.relay(_increment_noInline);
return f(arg);
""",seed,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertNull(function(code,"relay").summary());
assertEquals("42",Eval2.eval(code,41));
assertEquals("1",Eval2.eval(code,0));
}
}
@Test public void testImportedFunctionField() throws Exception {
Path root = library("function-field-");
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"Targets","var chosen = { int n -> n+1; };");
object(root,paths,"Apply","val run = { int n -> val f = Targets.chosen; return f(n); };");
for( long seed : new long[]{1,123,987654321} ) {
CodeGen code = new CodeGen(null,root.toString(),paths,"Main",
"return Apply.run(arg);",seed,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertNull(function(code,"run").summary());
assertEquals("42",Eval2.eval(code,41));
assertEquals("1",Eval2.eval(code,0));
}
}
@Test public void testImportedUnknownCallback() throws Exception {
Path root = library("unknown-callback-");
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"Apply","""
val apply = { {int->int} f,int n -> f(n); };
val apply_noInline = { {int->int} f,int n -> f(n); };
""");
for( String target : new String[]{"apply","apply_noInline","forward_noInline"} )
for( long seed : new long[]{1,123,987654321} ) {
CodeGen code = new CodeGen(null,root.toString(),paths,"Main",
"val _increment_noInline = { int n -> n+1; }; "+
"val forward_noInline = { {int->int} f,int n -> Apply.apply_noInline(f,n); }; return "+
(target.equals("forward_noInline") ? target : "Apply."+target)+"(_increment_noInline,arg);",
seed,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertEquals("42",Eval2.eval(code,41));
assertEquals("1",Eval2.eval(code,0));
}
CodeGen nativeCode = new CodeGen(null,root.toString(),paths,"NativeCallback","""
val _increment_noInline = { int n -> n+1; };
val run = { int n -> Apply.apply_noInline(_increment_noInline,n); };
""",123,true,TypeInteger.BOT).driver(TestC.CPU_PORT,TestC.CALL_CONVENTION,false,false);
Path driver = root.resolve("driver.c");
Files.writeString(driver,"""
__attribute__((CALL_CONV)) extern long long run(long long);
int main(void) { return run(41)==42 && run(0)==1 ? 0 : 1; }
""");
String exe = root.resolve(TestC.OS.startsWith("Windows") ? "test.exe" : "test").toString();
assertEquals("",TestC.gcc(nativeCode,
TestC.CALL_CONVENTION.equals("win64") ? "ms_abi" : "sysv_abi",driver.toString(),null,exe));
}
@Test public void testUnknownCallbackEncoding() {
for( String cpu : new String[]{"x86_64_v2","arm","riscv"} )
new CodeGen("""
val apply = { {int->int} f,int n -> f(n); };
val apply_noInline = { {int->int} f,int n -> f(n); };
""")
.driver(CodeGen.Phase.Encoding,cpu,"SystemV");
}
@Test public void testImportedCallbackInitCycle() throws Exception {
Path root = library("callback-cycle-");
Path src = Files.createDirectory(root.resolve("src"));
Ary<String> paths = new Ary<>(new String[]{root.toString()});
object(root,paths,"Apply","val apply_noInline = { {int->int} f,int n -> f(n); };");
write(src,"Root","val entry = A.value;");
write(src,"Root/A","val callback = { int n -> B.value; }; int value = Apply.apply_noInline(callback,1);");
write(src,"Root/B","int value = A.value;");
for( long seed : new long[]{1,123,987654321} ) {
try {
new CodeGen(src.toString(),root.toString(),paths,"Root",null,seed,true,TypeInteger.BOT)
.driver(CodeGen.Phase.TypeCheck);
fail("The unknown callback can close an initialization cycle");
} catch( Parser.ParseException ex ) {
assertTrue(ex.getMessage(),ex.getMessage().startsWith("Cyclic class initialization:"));
assertTrue(ex.getMessage(),ex.getMessage().contains("Root.A"));
assertTrue(ex.getMessage(),ex.getMessage().contains("Root.B"));
assertTrue(ex.getMessage(),ex.getMessage().contains("unknown call"));
}
}
}
@Test public void testPossibleCycleDoesNotLoadConditionHelper() throws Exception {
Path base = Path.of("build/objs/selective");
Files.createDirectories(base);
Path root = Files.createTempDirectory(base,"cycle-");
Path src = Files.createDirectory(root.resolve("src"));
Path lib = Files.createDirectory(root.resolve("lib"));
StringBuilder helper = new StringBuilder("val test={bool n -> ");
// Large parse, small final body: it will not request speculative loading.
for( int i = 0; i<80; i++ ) helper.append("val x").append(i).append("=n+0;");
helper.append("return n;};");
object(lib,null,"Predicate",helper.toString());
// All sources and objects agree. The summary cannot express test(n)==n.
write(src,"Root","val entry=A;");
write(src,"Root/A","int value=1; if(Predicate.test(false)) value=B.value;");
write(src,"Root/B","int value=A.value;");
CodeGen code = new CodeGen(src.toString(),root.toString(),new Ary<>(new String[]{lib.toString()}),
"Root",null,123,true,TypeInteger.BOT).driver(CodeGen.Phase.FinalizeIR);
assertNotNull(function(code,"test").summary());
assertNotNull("Summaries alone report a potential cycle",new ClassInitDependencies(code).check());
try {
code.driver(CodeGen.Phase.TypeCheck);
fail("Reject the possible cycle without loading the condition helper");
} catch( Parser.ParseException ex ) {
assertTrue(ex.getMessage(),ex.getMessage().startsWith("Cyclic class initialization:"));
assertTrue(ex.getMessage(),ex.getMessage().contains("Root.A -> Root.B"));
assertTrue(ex.getMessage(),ex.getMessage().contains("Root.B -> Root.A"));
}
assertNotNull(function(code,"test").summary());
assertNull(code.getElf(code._compunits.get("Predicate")._obj)._nodes);
}
private static void object(Path dir, Ary<String> paths, String name, String source) {
new CodeGen(null,dir.toString(),paths,name,source,123,true,TypeInteger.BOT)
.driver(TestC.CPU_PORT,TestC.CALL_CONVENTION,false,false);
}
@Test public void testSummariesInliningAndStaticLink() throws Exception {
Path base = Path.of("build/objs/selective");
Files.createDirectories(base);
Path root = Files.createTempDirectory(base,"library-");
Path src = Files.createDirectory(root.resolve("src"));
Path lib = Files.createDirectory(root.resolve("lib"));
Path app = Files.createDirectory(root.resolve("app"));
write(src,"Lib","val api=Api; val work=Work; val unused=Unused;");
write(src,"Lib/Api","""
val p={int n -> Work.write_noInline(n);};
val p_noInline={int n -> Work.write_noInline(n);};
""");
write(src,"Lib/Work","val write_noInline={int n -> n+1;};");
write(src,"Lib/Unused","val f={int n -> n*2;};");
new CodeGen(src.toString(),lib.toString(),null,"Lib",null,123,true,TypeInteger.BOT)
.driver(TestC.CPU_PORT,TestC.CALL_CONVENTION,false,false);
for( String unit : new String[]{"Lib","Lib/Api","Lib/Work","Lib/Unused"} )
assertTrue(unit,Files.isRegularFile(lib.resolve(unit+".o")));
Ary<String> paths = new Ary<>(new String[]{lib.toString()});
CodeGen code = new CodeGen(null,app.toString(),paths,"Main",
"if(arg==0) return -1; return Lib.api.p_noInline(arg);",123,true,TypeInteger.BOT).driver(CodeGen.Phase.TypeCheck);
assertNotNull(function(code,"Lib.Api.p_noInline").summary());
assertNotNull(function(code,"Lib.Work.write_noInline").summary());
assertNotNull(function(code,"Lib.Unused.f").summary());
assertEquals("-1",Eval2.eval(code,0));
assertNotNull("An untaken branch does not load its target",function(code,"Lib.Api.p_noInline").summary());
assertEquals("42",Eval2.eval(code,41));
assertNull(function(code,"Lib.Work.write_noInline").summary());
assertNotNull("Evaluation leaves unrelated objects unloaded",function(code,"Lib.Unused.f").summary());
assertEquals("6",Eval2.eval(code,5));
code=new CodeGen(null,app.toString(),paths,"Main",
"val run={int n -> Lib.api.p(n);}; return run(arg);",123,true,TypeInteger.BOT)
.driver(CodeGen.Phase.TypeCheck);
assertNull("p requested Api's implementation",function(code,"Lib.Api.p").summary());
assertNotNull("The remaining call needs a signature, not a body",function(code,"Lib.Work.write_noInline").summary());
assertNotNull("A namespace reexport does not request IR",function(code,"Lib.Unused.f").summary());
code.driver(TestC.CPU_PORT,TestC.CALL_CONVENTION,false,false);
Path driver = app.resolve("driver.c");
Files.writeString(driver,"""
__attribute__((CALL_CONV)) extern long long run(long long);
int main(void) { return run(41)==42 ? 0 : 1; }
""");
String exe = app.resolve(TestC.OS.startsWith("Windows") ? "test.exe" : "test").toString();
assertTrue("The compiler already resolved this transitive object",
TestC.linkObjs(code).contains(lib.resolve("Lib/Work.o").toRealPath().toString()));
assertEquals("",TestC.gcc(code,
TestC.CALL_CONVENTION.equals("win64") ? "ms_abi" : "sysv_abi",driver.toString(),null,exe));
Files.delete(lib.resolve("Lib/Work.o"));
// Even an untaken branch requires a complete dependency closure for a
// fresh program.
try {
Eval2.eval(new CodeGen(null,app.toString(),paths,"Missing",
"if(arg==0) return -1; return Lib.api.p_noInline(arg);",123,true,TypeInteger.BOT),0);
fail("Missing transitive code must fail before evaluation");
} catch( RuntimeException ex ) { assertTrue(ex.getMessage(),ex.getMessage().contains("Lib/Work")); }
}
private static FunNode function(CodeGen code, String name) {
for( FunNode fun : code._linker ) if( fun!=null && name.equals(fun._name) ) return fun;
throw new AssertionError("Missing function "+name);
}
private static void write(Path src, String unit, String text) throws IOException {
Path file = src.resolve(unit+".smp");
Files.createDirectories(file.getParent());
Files.writeString(file,text);
}
}
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