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Fix segfault

This commit is contained in:
Augusto Gunsch 2021-01-06 21:18:52 -03:00
parent 8325b067b4
commit 80a3e1ef0f
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GPG Key ID: F7EEFE29825C72DC
8 changed files with 63 additions and 56 deletions
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2
Makefile
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@ -1,7 +1,7 @@
FILES = *.c */*.c
LIBRARIES = -lpthread
INCLUDES = -I. -I./parser/ -I./compiler/ -I./vm/ -I./tokenizer/ -I./misc/
CFLAGS = -std=c99 -Wall
CFLAGS = -std=c99 -Wall -O3
OUTFILE = jack-compiler
main: ${FILES}

36
compiler/compiler-expressions.c
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@ -15,10 +15,10 @@ char* toascii(char c);
// Dealing with singular terms
LINEBLOCK* compilestrconst(char* str);
LINEBLOCK* compilekeywordconst(SCOPE* s, TERM* t);
LINEBLOCK* compilearrayitem(SCOPE* s, TERM* t);
LINEBLOCK* compilearrayitem(SCOPE* s, DEBUGINFO* d, TERM* t);
LINEBLOCK* compilecallln(SCOPE* s, SUBROUTDEC* d, SUBROUTCALL* call);
LINEBLOCK* pushunaryopterm(SCOPE* s, TERM* t);
LINEBLOCK* compileterm(SCOPE* s, TERM* t);
LINEBLOCK* pushunaryopterm(SCOPE* s, DEBUGINFO* d, TERM* t);
LINEBLOCK* compileterm(SCOPE* s, DEBUGINFO* d, TERM* t);
/* END FORWARD DECLARATIONS */
@ -128,9 +128,9 @@ LINEBLOCK* compilekeywordconst(SCOPE* s, TERM* t) {
return mklnblk(pushconstant(0));
}
LINEBLOCK* compilearrayitem(SCOPE* s, TERM* t) {
LINEBLOCK* blk = compileexpression(s, t->array->exp);
appendln(blk, pushvar(s, t->array->name));
LINEBLOCK* compilearrayitem(SCOPE* s, DEBUGINFO* d, TERM* t) {
LINEBLOCK* blk = compileexpression(s, d, t->array->exp);
appendln(blk, pushvar(s, d, t->array->name));
appendln(blk, onetoken("add"));
@ -161,7 +161,7 @@ LINEBLOCK* compilesubroutcall(SCOPE* s, SUBROUTCALL* call) {
LINEBLOCK* blk = compilecallln(s, d, call);
if(call->parameters != NULL)
blk = mergelnblks(compileexplist(s, call->parameters), blk);
blk = mergelnblks(compileexplist(s, call->debug, call->parameters), blk);
if(d->subroutclass == method) {
if(call->parentname == NULL)
@ -179,8 +179,8 @@ LINEBLOCK* compilesubroutcall(SCOPE* s, SUBROUTCALL* call) {
return blk;
}
LINEBLOCK* pushunaryopterm(SCOPE* s, TERM* t) {
LINEBLOCK* blk = compileexpression(s, t->expression);
LINEBLOCK* pushunaryopterm(SCOPE* s, DEBUGINFO* d, TERM* t) {
LINEBLOCK* blk = compileexpression(s, d, t->expression);
LINE* neg;
if(t->unaryop == '-')
neg = onetoken("neg");
@ -190,23 +190,23 @@ LINEBLOCK* pushunaryopterm(SCOPE* s, TERM* t) {
return blk;
}
LINEBLOCK* compileterm(SCOPE* s, TERM* t) {
if(t->type == varname) return mklnblk(pushvar(s, t->string));
LINEBLOCK* compileterm(SCOPE* s, DEBUGINFO* d, TERM* t) {
if(t->type == varname) return mklnblk(pushvar(s, d, t->string));
if(t->type == intconstant) return mklnblk(pushconstant(t->integer));
if(t->type == stringconstant) return compilestrconst(t->string);
if(t->type == keywordconstant) return compilekeywordconst(s, t);
if(t->type == arrayitem) return compilearrayitem(s, t);
if(t->type == arrayitem) return compilearrayitem(s, d, t);
if(t->type == subroutcall) return compilesubroutcall(s, t->call);
if(t->type == innerexpression) return compileexpression(s, t->expression);
return pushunaryopterm(s, t);
if(t->type == innerexpression) return compileexpression(s, d, t->expression);
return pushunaryopterm(s, d, t);
}
// Dealing with whole expressions
LINEBLOCK* compileexpression(SCOPE* s, TERM* e) {
LINEBLOCK* compileexpression(SCOPE* s, DEBUGINFO* d, TERM* e) {
LINEBLOCK* blk = NULL;
if(e != NULL) {
while(true) {
blk = mergelnblks(blk, compileterm(s, e));
blk = mergelnblks(blk, compileterm(s, d, e));
if(e->next == NULL)
break;
appendln(blk, mathopln(e->op));
@ -216,10 +216,10 @@ LINEBLOCK* compileexpression(SCOPE* s, TERM* e) {
return blk;
}
LINEBLOCK* compileexplist(SCOPE* s, EXPRESSIONLIST* explist) {
LINEBLOCK* compileexplist(SCOPE* s, DEBUGINFO* d, EXPRESSIONLIST* explist) {
LINEBLOCK* head = NULL;
while(explist != NULL) {
head = mergelnblks(head, compileexpression(s, explist->expression));
head = mergelnblks(head, compileexpression(s, d, explist->expression));
explist = explist->next;
}
return head;

4
compiler/compiler-expressions.h
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@ -10,6 +10,6 @@
LINEBLOCK* compilesubroutcall(SCOPE* s, SUBROUTCALL* call);
// Dealing with whole expressions
LINEBLOCK* compileexpression(SCOPE* s, TERM* e);
LINEBLOCK* compileexplist(SCOPE* s, EXPRESSIONLIST* explist);
LINEBLOCK* compileexpression(SCOPE* s, DEBUGINFO* d, TERM* e);
LINEBLOCK* compileexplist(SCOPE* s, DEBUGINFO* d, EXPRESSIONLIST* explist);
#endif

7
compiler/compiler-scopes.c
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@ -106,6 +106,13 @@ VAR* getvar(SCOPE* s, const char* name) {
return NULL;
}
VAR* getvarmustexist(SCOPE* s, DEBUGINFO* d, const char* name) {
VAR* v = getvar(s, name);
if(v == NULL)
notdeclared(name, d);
return v;
}
CLASS* getclass(SCOPE* s, const char* name) {
CLASS* curr = s->classes;
while(curr != NULL) {

1
compiler/compiler-scopes.h
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@ -52,6 +52,7 @@ CLASS* getclass(SCOPE* s, const char* name);
// Generic getters
VAR* getvar(SCOPE* s, const char* name);
VAR* getvarmustexist(SCOPE* s, DEBUGINFO* d, const char* name);
// Freeing
void freescope(SCOPE* s);

48
compiler/compiler-statements.c
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@ -12,10 +12,10 @@ LINE* pushtemp();
char* mkcondlabel(char* name, int count);
// Handling individual statements
LINEBLOCK* compileret(SCOPE* s, TERM* e);
LINEBLOCK* compileif(SCOPE* s, IFSTATEMENT* st);
LINEBLOCK* compilewhile(SCOPE* s, CONDSTATEMENT* w);
LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l);
LINEBLOCK* compileret(SCOPE* s, STATEMENT* st);
LINEBLOCK* compileif(SCOPE* s, STATEMENT* st);
LINEBLOCK* compilewhile(SCOPE* s, STATEMENT* st);
LINEBLOCK* compilelet(SCOPE* s, STATEMENT* st);
LINEBLOCK* compilestatement(SCOPE* s, STATEMENT* st);
/* END FORWARD DECLARATIONS */
@ -41,7 +41,8 @@ char* mkcondlabel(char* name, int count) {
}
// Handling individual statements
LINEBLOCK* compileret(SCOPE* s, TERM* e) {
LINEBLOCK* compileret(SCOPE* s, STATEMENT* st) {
TERM* e = st->retstatement;
LINE* ret = onetoken("return");
LINEBLOCK* blk = mklnblk(ret);
@ -50,13 +51,14 @@ LINEBLOCK* compileret(SCOPE* s, TERM* e) {
char* tokens[] = { "push", "constant", "0" };
appendlnbefore(blk, mkln(tokens));
} else
blk = mergelnblks(compileexpression(s, e), blk);
blk = mergelnblks(compileexpression(s, st->debug, e), blk);
return blk;
}
LINEBLOCK* compileif(SCOPE* s, IFSTATEMENT* st) {
LINEBLOCK* blk = compileexpression(s, st->base->expression);
LINEBLOCK* compileif(SCOPE* s, STATEMENT* st) {
IFSTATEMENT* ifst = st->ifstatement;
LINEBLOCK* blk = compileexpression(s, st->debug, ifst->base->expression);
pthread_mutex_lock(&(s->compiler->ifmutex));
static int ifcount = 0;
@ -75,10 +77,10 @@ LINEBLOCK* compileif(SCOPE* s, IFSTATEMENT* st) {
char* truelabelln[] = { "label", truelabel };
appendln(blk, mkln(truelabelln));
blk = mergelnblks(blk, compilestatements(s, st->base->statements));
blk = mergelnblks(blk, compilestatements(s, ifst->base->statements));
char* endlabel;
bool haselse = st->elsestatements != NULL;
bool haselse = ifst->elsestatements != NULL;
if(haselse) {
endlabel = mkcondlabel("IF_END", mycount);
char* endgoto[] = { "goto", endlabel };
@ -89,7 +91,7 @@ LINEBLOCK* compileif(SCOPE* s, IFSTATEMENT* st) {
appendln(blk, mkln(falselabelln));
if(haselse) {
blk = mergelnblks(blk, compilestatements(s, st->elsestatements));
blk = mergelnblks(blk, compilestatements(s, ifst->elsestatements));
char* endlabelln[] = { "label", endlabel };
appendln(blk, mkln(endlabelln));
free(endlabel);
@ -101,8 +103,9 @@ LINEBLOCK* compileif(SCOPE* s, IFSTATEMENT* st) {
return blk;
}
LINEBLOCK* compilewhile(SCOPE* s, CONDSTATEMENT* w) {
LINEBLOCK* blk = compileexpression(s, w->expression);
LINEBLOCK* compilewhile(SCOPE* s, STATEMENT* st) {
CONDSTATEMENT* w = st->whilestatement;
LINEBLOCK* blk = compileexpression(s, st->debug, w->expression);
pthread_mutex_lock(&(s->compiler->whilemutex));
static int whilecount = 0;
@ -134,13 +137,14 @@ LINEBLOCK* compilewhile(SCOPE* s, CONDSTATEMENT* w) {
return blk;
}
LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l) {
LINEBLOCK* blk = compileexpression(s, l->expression);
LINEBLOCK* compilelet(SCOPE* s, STATEMENT* st) {
LETSTATEMENT* l = st->letstatement;
LINEBLOCK* blk = compileexpression(s, st->debug, l->expression);
if(l->arrayind != NULL) {
appendlnbefore(blk, onetoken("add"));
appendlnbefore(blk, pushvar(s, l->varname));
blk = mergelnblks(compileexpression(s, l->arrayind), blk);
appendlnbefore(blk, pushvar(s, st->debug, l->varname));
blk = mergelnblks(compileexpression(s, st->debug, l->arrayind), blk);
appendln(blk, poptemp());
appendln(blk, popthatadd());
@ -148,17 +152,17 @@ LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l) {
appendln(blk, popthat());
}
else
appendln(blk, popvar(s, l->varname));
appendln(blk, popvar(s, st->debug, l->varname));
return blk;
}
LINEBLOCK* compilestatement(SCOPE* s, STATEMENT* st) {
s->currdebug = st->debug;
if(st->type == dostatement) return compilesubroutcall(s, st->dostatement);
if(st->type == returnstatement) return compileret(s, st->retstatement);
if(st->type == ifstatement) return compileif(s, st->ifstatement);
if(st->type == whilestatement) return compilewhile(s, st->whilestatement);
return compilelet(s, st->letstatement);
if(st->type == returnstatement) return compileret(s, st);
if(st->type == ifstatement) return compileif(s, st);
if(st->type == whilestatement) return compilewhile(s, st);
return compilelet(s, st);
}
LINEBLOCK* compilestatements(SCOPE* s, STATEMENT* sts) {

13
compiler/compiler-util.c
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@ -8,21 +8,16 @@ LINE* opvarraw(SCOPE* s, char* op, VAR* v) {
return ln;
}
LINE* opvar(SCOPE* s, char* op, const char* name) {
VAR* v = getvar(s, name);
return opvarraw(s, op, v);
}
LINE* pushvarraw(SCOPE* s, VAR* v) {
return opvarraw(s, "push", v);
}
LINE* pushvar(SCOPE* s, const char* name) {
return opvar(s, "push", name);
LINE* pushvar(SCOPE* s, DEBUGINFO* d, const char* name) {
return opvarraw(s, "push", getvarmustexist(s, d, name));
}
LINE* popvar(SCOPE* s, const char* name) {
return opvar(s, "pop", name);
LINE* popvar(SCOPE* s, DEBUGINFO* d, const char* name) {
return opvarraw(s, "pop", getvarmustexist(s, d, name));
}
LINE* poptemp() {

4
compiler/compiler-util.h
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@ -13,8 +13,8 @@ LINE* onetoken(char* str);
LINE* mksimpleln(char** tokens, int count);
LINE* pushvarraw(SCOPE* s, VAR* v);
LINE* pushvar(SCOPE* s, const char* name);
LINE* popvar(SCOPE* s, const char* name);
LINE* pushvar(SCOPE* s, DEBUGINFO* d, const char* name);
LINE* popvar(SCOPE* s, DEBUGINFO* d, const char* name);
LINE* poptemp();
LINE* popthatadd();