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Memory leak when using Statement.expanded_sql (#553)

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Memory leak when using Statement.expanded_sql
This commit is contained in:
gwenn 2019-07-28 08:53:26 +02:00 committed by GitHub
parent d87a1bbf7e
commit 4db226c0df
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 17 additions and 13 deletions
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15
src/raw_statement.rs
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@ -114,15 +114,14 @@ impl RawStatement {
unsafe { ffi::sqlite3_stmt_readonly(self.0) != 0 } unsafe { ffi::sqlite3_stmt_readonly(self.0) != 0 }
} }
/// `CStr` must be freed
#[cfg(feature = "bundled")] #[cfg(feature = "bundled")]
pub fn expanded_sql(&self) -> Option<&CStr> { pub unsafe fn expanded_sql(&self) -> Option<&CStr> {
unsafe { let ptr = ffi::sqlite3_expanded_sql(self.0);
let ptr = ffi::sqlite3_expanded_sql(self.0); if ptr.is_null() {
if ptr.is_null() { None
None } else {
} else { Some(CStr::from_ptr(ptr))
Some(CStr::from_ptr(ptr))
}
} }
} }

15
src/statement.rs
View File

@ -550,11 +550,16 @@ impl Statement<'_> {
/// Returns a string containing the SQL text of prepared statement with /// Returns a string containing the SQL text of prepared statement with
/// bound parameters expanded. /// bound parameters expanded.
#[cfg(feature = "bundled")] #[cfg(feature = "bundled")]
pub fn expanded_sql(&self) -> Option<&str> { pub fn expanded_sql(&self) -> Option<String> {
unsafe { unsafe {
self.stmt match self.stmt.expanded_sql() {
.expanded_sql() Some(s) => {
.map(|s| str::from_utf8_unchecked(s.to_bytes())) let sql = str::from_utf8_unchecked(s.to_bytes()).to_owned();
ffi::sqlite3_free(s.as_ptr() as *mut _);
Some(sql)
}
_ => None,
}
} }
} }
@ -975,7 +980,7 @@ mod test {
let db = Connection::open_in_memory().unwrap(); let db = Connection::open_in_memory().unwrap();
let stmt = db.prepare("SELECT ?").unwrap(); let stmt = db.prepare("SELECT ?").unwrap();
stmt.bind_parameter(&1, 1).unwrap(); stmt.bind_parameter(&1, 1).unwrap();
assert_eq!(Some("SELECT 1"), stmt.expanded_sql()); assert_eq!(Some("SELECT 1".to_owned()), stmt.expanded_sql());
} }
#[test] #[test]