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made changes to parser.py for if else conditionals #13

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made changes to parser.py for if else conditionals #13

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45 changes: 25 additions & 20 deletions UserCode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3,30 +3,35 @@

int fibonacci(int n) {

if (n <= 1) {
return n;
} else {
return fibonacci(n - 1) + fibonacci(n - 2);
}
if (n <= 1) {
return n;
} else {
return fibonacci(n - 1) + fibonacci(n - 2);
}
}

int main() {
int random = 5;
int num = 10;
int *n = (int *)malloc(sizeof(int));
int *x = (int *)malloc(sizeof(int));

*x = random;
*n = num;

printf("Fibonacci sequence up to %d:\n", *n);
for (int i = 0; i < *n; i++) {
printf("%d\n", fibonacci(i));
printf("----\n");
}
int random = 5;
int num = 10;
int *n = (int *)malloc(sizeof(int));
int *x = (int *)malloc(sizeof(int));

*x = random;
*n = num;

printf("Fibonacci sequence up to %d:\n", *n);
for (int i = 0; i < *n; i++) {
if (i % 2 == 0) {
int *leak1 = (int *)malloc(sizeof(int));
*leak1 = i;
} else {
int *leak2 = (int *)malloc(sizeof(int));
*leak2 = i * 2;
}
printf("%d\n", fibonacci(i));
printf("----\n");
}

printf("\n");
return 0;
printf("\n");
return 0;
}
42 changes: 27 additions & 15 deletions parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,45 +3,58 @@

deallocations = []
references = {}
conditional_allocs = {}


def traverse_ast(node, start_line=None,end_line = None):
def traverse_ast(node, start_line=None, end_line=None, inside_conditional=False):
if start_line is None:
start_line = node.location.line

if node.kind == CursorKind.FOR_STMT or node.kind == CursorKind.WHILE_STMT:
start_line = node.location.line
end_line = node.extent.end.line

if node.kind == CursorKind.IF_STMT:
inside_conditional = True
start_line = node.location.line
end_line = node.extent.end.line

if node.kind == CursorKind.DECL_REF_EXPR:
if node.referenced and node.referenced.kind == CursorKind.VAR_DECL:
var_name = node.spelling
references[var_name] = node.location.line
if not inside_conditional:
references[var_name] = node.location.line
else:
conditional_allocs[var_name] = node.location.line

for child in node.get_children():
traverse_ast(child, start_line, end_line)
traverse_ast(child, start_line, end_line, inside_conditional)

if node.kind == CursorKind.FOR_STMT or node.kind == CursorKind.WHILE_STMT:
if (
node.kind == CursorKind.FOR_STMT
or node.kind == CursorKind.WHILE_STMT
or node.kind == CursorKind.IF_STMT
):
for iterator in references.keys():
line_number = references[iterator]
if start_line <= line_number <= end_line:
references[iterator] = end_line


def check_alloc_term(filename, line_number, var_name):
with open(filename, 'r') as f:
with open(filename, "r") as f:
lines = f.readlines()
for i, line in enumerate(lines):
if ("alloc" in line):
if (("*" + var_name) in line):
if "alloc" in line:
if ("*" + var_name) in line:
return True
return False


def main(input_file, json_file):
index = Index.create()
tu = index.parse(input_file, args=['-std=c11'])
print('Translation unit:', tu.spelling)
tu = index.parse(input_file, args=["-std=c11"])
print("Translation unit:", tu.spelling)

for node in tu.cursor.get_children():
if node.kind == CursorKind.FUNCTION_DECL:
Expand All @@ -51,15 +64,14 @@ def main(input_file, json_file):
references[iterator] = int(references[iterator])
line_number = references[iterator]
if check_alloc_term(input_file, line_number, iterator):
deallocations.append({"line_number": line_number, "variable_name": iterator})
deallocations.append(
{"line_number": line_number, "variable_name": iterator}
)

output = {
"deallocations": deallocations
}
#print(deallocations)
output = {"deallocations": deallocations}

if deallocations:
with open(json_file, 'w') as f:
with open(json_file, "w") as f:
json.dump(output, f, indent=4)
print("Data written to references.json")
else:
Expand Down