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platform_system_core
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Improve error handling 

Don't segfault if the right-hand operand of a binary operator is missing.
Don't segfault if a semicolon is missing at the end of a forward
declaration.
This commit is contained in:
Jack Palevich 2009-07-15 18:23:22 -07:00
parent 2aaf21f1be
commit d1f57e689b
1 changed files with 10 additions and 1 deletions
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11
libacc/acc.cpp
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@ -3910,6 +3910,8 @@ class Compiler : public ErrorSink {
next();
} else if (t == EOF ) {
error("Unexpected EOF.");
} else if (t == ';') {
error("Unexpected ';'");
} else if (!checkSymbol(t)) {
// Don't have to do anything special here, the error
// message was printed by checkSymbol() above.
@ -4038,7 +4040,12 @@ class Compiler : public ErrorSink {
} else {
pGen->pushR0();
binaryOp(level);
// Check for syntax error.
if (pGen->getR0Type() == NULL) {
// We failed to parse a right-hand argument.
// Push a dummy value so we don't fail
pGen->li(0, mkpInt);
}
if ((level == 4) | (level == 5)) {
pGen->gcmp(t, mkpInt);
} else {
@ -4595,6 +4602,8 @@ class Compiler : public ErrorSink {
// Function declaration
if (accept(';')) {
// forward declaration.
} else if (tok != '{') {
error("expected '{'");
} else {
if (name) {
/* patch forward references (XXX: does not work for function