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2020-10-14lib: selectively disable format string security checks for ut_printf_common()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-14eval: get rid of alloca() allocationsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-14treewide: unify error handlingJo-Philipp Wich
Get rid of the distinction between lexer/parser errors and runtime exceptions, use exceptions everywhere instead. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-14treewide: rework source file and callstack handlingJo-Philipp Wich
- Keep an open FILE* reference to processed source files in order to be able to rewind and extract error context later - Build a proper call stack when invoking utpl functions - Report call stack in exceptions Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-14eval: refactor ut_parse_op()Jo-Philipp Wich
Refactor the central ut_parse_op() function to use a jump table for invoking the proper operand handler function in order to reduce the compiled code size. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-14lexer: rewriteJo-Philipp Wich
Rewrite the lexer into a restartable state machine to support parsing from file streams without the need to read the entire source text into memory first. As a side effect, the length of labels and strings is unlimited now. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06eval: properly break out of switch/case on return/continue/exceptionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06lib: add warn() functionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06fs: add stdio handlesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06eval: restore context pointer of first evaluated dot/bracket expressionJo-Philipp Wich
When an expression such as `foo.bar(a.b, c.d)` is evaluated, the state context pointer will point to `c` while we need `foo` when invoking functions. Since the context pointer is only relevant for function calls and since for function call opcodes, the lhs expression is always the first operand, there is no need to store the context of subsequent ops. Adjust the ut_get_operands() procedure to restore state->ctx to the result of the first evaluated operand. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06treewide: rework exception context formattingJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06ast, eval: track current file name across function invocationsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-06ast: fix refcount imbalance when releasing scopesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-05eval: restore correct scope after leaving functionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-05lexer: properly handle reserved `if` wordJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-05ast: add helpers to set error token bitsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-04treewide: rework function scopingJo-Philipp Wich
- Implement proper closure scoping for function - Avoid circular references when managing scopes pointers - Eliminate ut_putval() in favor to json_object_put() - Fix function return value handling - Change internal function structure Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02eval: avoid null pointer access in ut_invoke()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02eval: properly forward execeptions in for-in loop value evaluationJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02ast: store function declarations as opcode offsetsJo-Philipp Wich
We cannot use direct pointers since the opcode array might be reallocated resulting in potentially changed memory addresses. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: fix missing refcount increase in ut_push()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02eval: free previous exception when storing a new oneJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02uci: fix some memory leaks in ut_uci_foreach()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: fix incorrect exception type check in ut_include()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: wrap runtime exceptions in included utpl codeJo-Philipp Wich
This is needed to preserve error context information. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02build: install extension libraries as wellJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: tweak error context formattingJo-Philipp Wich
Do not emit additional newline when formatting error context and print it instead when outputting the exception. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02eval: fix potential uninitialized memory access in ut_getref()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02Revert "eval: release root scope after finishing the execution"Jo-Philipp Wich
This reverts commit 206630d7141f32594e9110081f6710446f5aebd3. Revert this commit to fix a double-free. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02treewide: rework handling of memory allocation failuresJo-Philipp Wich
Instead of propagating failures to the caller, print a generic error message and terminate program execution through abort(). Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02eval: release root scope after finishing the executionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: add include() functionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02main: track current template filename during executionJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02lib: fix procedure entry in ut_require_utpl()Jo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-26lib: add json() functionJo-Philipp Wich
The json function allows parsing JSON strings into structured data. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-26lib: implement '%J' printf formatJo-Philipp Wich
The `%J` format allows outputting values as valid JSON string. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-24syntax: add regular expression supportJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-24main: support invoking utpl interpreter through shebangJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-23eval: ensure that argument array is initialized when invoking C functionsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-23eval: propagate exceptions when resolving referencesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-22syntax: allow empty switch statementsJo-Philipp Wich
Also add testcases for switch/case blocks. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-22syntax: introduce case statement supportJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-22tests: support multiple testcases per test fileJo-Philipp Wich
Also support specifying expected exit codes. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21tests: add try/catch testcaseJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21tests: fix `this` context testcaseJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21eval: fix potential null pointer access when computing operandsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21syntax: introduce try/catch blocksJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21eval: don't escape slashes when outputting array or object JSONJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21treewide: ensure to properly propagate exceptionsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-20treewide: rework extended type handlingJo-Philipp Wich
Register prototype object directly together with the type instead of setting it manually whenever an extended type value is instantiated. This also allows freeing the various prototype objects in dlopened modules. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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