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trowskitrowski
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Improve fiber backtraces
The start/resume/throw execute_data is now attached as the prev_execute_data to the bottom frame of the fiber stack when the fiber is running.
1 parent f3465e6 commit 810fb59

13 files changed

+262
-4
lines changed

‎Zend/tests/fibers/backtrace-deep-nesting.phpt‎

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@@ -0,0 +1,54 @@
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--TEST--
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Backtrace in deeply nested function call
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--FILE--
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<?php
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function suspend_fiber(int $level): void
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{
8+
if ($level >= 10) {
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$value = \Fiber::suspend($level);
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failing_function($value);
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}
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suspend_fiber($level + 1);
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}
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function failing_function(string $value): never
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{
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throw_exception();
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}
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function throw_exception(): never
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{
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throw new Exception;
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}
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$fiber = new Fiber(function (): void {
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suspend_fiber(0);
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});
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$fiber->start();
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$fiber->resume('test');
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?>
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--EXPECTF--
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Fatal error: Uncaught Exception in %sbacktrace-deep-nesting.php:%d
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Stack trace:
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#0 %sbacktrace-deep-nesting.php(%d): throw_exception()
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#1 %sbacktrace-deep-nesting.php(%d): failing_function('test')
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#2 %sbacktrace-deep-nesting.php(%d): suspend_fiber(10)
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#3 %sbacktrace-deep-nesting.php(%d): suspend_fiber(9)
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#4 %sbacktrace-deep-nesting.php(%d): suspend_fiber(8)
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#5 %sbacktrace-deep-nesting.php(%d): suspend_fiber(7)
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#6 %sbacktrace-deep-nesting.php(%d): suspend_fiber(6)
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#7 %sbacktrace-deep-nesting.php(%d): suspend_fiber(5)
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#8 %sbacktrace-deep-nesting.php(%d): suspend_fiber(4)
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#9 %sbacktrace-deep-nesting.php(%d): suspend_fiber(3)
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#10 %sbacktrace-deep-nesting.php(%d): suspend_fiber(2)
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#11 %sbacktrace-deep-nesting.php(%d): suspend_fiber(1)
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#12 %sbacktrace-deep-nesting.php(%d): suspend_fiber(0)
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#13 [internal function]: {closure}()
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#14 %sbacktrace-deep-nesting.php(%d): Fiber->resume('test')
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#15 {main}
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thrown in %sbacktrace-deep-nesting.php on line %d

‎Zend/tests/fibers/backtrace-nested.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
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--TEST--
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Backtrace in nested function call
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--FILE--
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<?php
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function suspend_fiber(): void
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{
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\Fiber::suspend();
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throw new Exception;
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}
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$fiber = new Fiber(function (): void {
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suspend_fiber();
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});
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$fiber->start();
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$fiber->resume();
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?>
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--EXPECTF--
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Fatal error: Uncaught Exception in %sbacktrace-nested.php:%d
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Stack trace:
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#0 %sbacktrace-nested.php(%d): suspend_fiber()
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#1 [internal function]: {closure}()
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#2 %sbacktrace-nested.php(%d): Fiber->resume()
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#3 {main}
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thrown in %sbacktrace-nested.php on line %d

‎Zend/tests/fibers/backtrace-object.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
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--TEST--
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Backtrace in with object as fiber callback
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--FILE--
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<?php
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class Test
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{
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public function __invoke(string $arg): void
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{
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Fiber::suspend();
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throw new Exception($arg);
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}
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}
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$fiber = new Fiber(new Test);
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$fiber->start('test');
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$fiber->resume();
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?>
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--EXPECTF--
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Fatal error: Uncaught Exception: test in %sbacktrace-object.php:%d
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Stack trace:
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#0 [internal function]: Test->__invoke('test')
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#1 %sbacktrace-object.php(%d): Fiber->resume()
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#2 {main}
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thrown in %sbacktrace-object.php on line %d

‎Zend/tests/fibers/debug-backtrace.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
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--TEST--
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Print backtrace in fiber
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--FILE--
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<?php
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function inner_function(): void
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{
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debug_print_backtrace();
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}
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$fiber = new Fiber(function (): void {
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inner_function();
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});
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$fiber->start();
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?>
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--EXPECTF--
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#0 inner_function() called at [%sdebug-backtrace.php:9]
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#1 {closure}()
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#2 Fiber->start() called at [%sdebug-backtrace.php:12]

‎Zend/tests/fibers/failing-fiber.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -20,5 +20,6 @@ string(4) "test"
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Fatal error: Uncaught Exception: test in %sfailing-fiber.php:%d
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Stack trace:
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#0 [internal function]: {closure}()
23-
#1 {main}
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#1 %sfailing-fiber.php(%d): Fiber->resume('test')
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#2 {main}
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thrown in %sfailing-fiber.php on line %d

‎Zend/tests/fibers/failing-nested-fiber.phpt‎

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--TEST--
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Test throwing from fiber
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--FILE--
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<?php
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$fiber = new Fiber(function (): void {
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$fiber = new Fiber(function (int $x, int $y): void {
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Fiber::suspend($x + $y);
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throw new Exception('test');
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});
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$value = $fiber->start(1, 2);
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var_dump($value);
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$fiber->resume($value);
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});
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$fiber->start();
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?>
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--EXPECTF--
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int(3)
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Fatal error: Uncaught Exception: test in %sfailing-nested-fiber.php:6
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Stack trace:
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#0 [internal function]: {closure}(1, 2)
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#1 %sfailing-nested-fiber.php(%d): Fiber->resume(3)
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#2 [internal function]: {closure}()
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#3 %sfailing-nested-fiber.php(%d): Fiber->start()
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#4 {main}
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thrown in %sfailing-nested-fiber.php on line %d

‎Zend/tests/fibers/fiber-throw-in-destruct.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -23,5 +23,7 @@ int(1)
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Fatal error: Uncaught Exception: test in %sfiber-throw-in-destruct.php:%d
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Stack trace:
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#0 [internal function]: class@anonymous::{closure}()
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#1 {main}
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#1 %sfiber-throw-in-destruct.php(%d): Fiber->resume()
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#2 [internal function]: class@anonymous->__destruct()
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#3 {main}
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thrown in %sfiber-throw-in-destruct.php on line %d

‎Zend/tests/fibers/resume-running-fiber.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -16,5 +16,6 @@ Fatal error: Uncaught FiberError: Cannot resume a fiber that is not suspended in
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Stack trace:
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#0 %sresume-running-fiber.php(%d): Fiber->resume()
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#1 [internal function]: {closure}()
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#2 {main}
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#2 %sresume-running-fiber.php(%d): Fiber->start()
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#3 {main}
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thrown in %sresume-running-fiber.php on line %d

‎Zend/tests/fibers/start-arguments.phpt‎

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Original file line numberDiff line numberDiff line change
@@ -24,5 +24,6 @@ int(1)
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Fatal error: Uncaught TypeError: {closure}(): Argument #1 ($x) must be of type int, string given in %sstart-arguments.php:%d
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Stack trace:
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#0 [internal function]: {closure}('test')
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#1 {main}
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#1 %sstart-arguments.php(%d): Fiber->start('test')
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#2 {main}
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thrown in %sstart-arguments.php on line %d

‎Zend/zend_fibers.c‎

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Original file line numberDiff line numberDiff line change
@@ -44,6 +44,8 @@ static zend_class_entry *zend_ce_fiber_error;
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static zend_object_handlers zend_fiber_handlers;
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47+
static zend_function zend_fiber_function = { ZEND_INTERNAL_FUNCTION };
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4749
typedef void *fcontext_t;
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4951
typedef struct _transfer_t {
@@ -331,9 +333,13 @@ static void ZEND_STACK_ALIGNED zend_fiber_execute(zend_fiber_context *context)
331333
EG(vm_stack_page_size) = ZEND_FIBER_VM_STACK_SIZE;
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333335
fiber->execute_data = (zend_execute_data *) stack->top;
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fiber->stack_bottom = fiber->execute_data;
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335338
memset(fiber->execute_data, 0, sizeof(zend_execute_data));
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340+
fiber->execute_data->func = &zend_fiber_function;
341+
fiber->stack_bottom->prev_execute_data = EG(current_execute_data);
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EG(current_execute_data) = fiber->execute_data;
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EG(jit_trace_num) = 0;
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EG(error_reporting) = error_reporting;
@@ -360,6 +366,7 @@ static void ZEND_STACK_ALIGNED zend_fiber_execute(zend_fiber_context *context)
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361367
zend_vm_stack_destroy();
362368
fiber->execute_data = NULL;
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fiber->stack_bottom = NULL;
363370
}
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365372
static zend_object *zend_fiber_object_create(zend_class_entry *ce)
@@ -494,6 +501,7 @@ ZEND_METHOD(Fiber, suspend)
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495502
fiber->execute_data = execute_data;
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fiber->status = ZEND_FIBER_STATUS_SUSPENDED;
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fiber->stack_bottom->prev_execute_data = NULL;
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498506
zend_fiber_suspend(fiber);
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@@ -547,6 +555,7 @@ ZEND_METHOD(Fiber, resume)
547555
}
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549557
fiber->status = ZEND_FIBER_STATUS_RUNNING;
558+
fiber->stack_bottom->prev_execute_data = execute_data;
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551560
zend_fiber_switch_to(fiber);
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@@ -578,6 +587,7 @@ ZEND_METHOD(Fiber, throw)
578587
fiber->exception = exception;
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580589
fiber->status = ZEND_FIBER_STATUS_RUNNING;
590+
fiber->stack_bottom->prev_execute_data = execute_data;
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582592
zend_fiber_switch_to(fiber);
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