Break on uncaught exceptions in current frame in phpdbg

3 files changed, 42 insertions, 3 deletions

diff --git a/sapi/phpdbg/phpdbg.h b/sapi/phpdbg/phpdbg.h
index 6de6e9e2b8..2cb588d086 100644
--- a/sapi/phpdbg/phpdbg.h
+++ b/sapi/phpdbg/phpdbg.h
@@ -233,6 +233,7 @@ ZEND_BEGIN_MODULE_GLOBALS(phpdbg)
 	HashTable registered;                        /* registered */
 	HashTable seek;                              /* seek oplines */
 	zend_execute_data *seek_ex;                  /* call frame of oplines to seek to */
+	zend_object *handled_exception;              /* last handled exception (prevent multiple handling of same exception) */
 	phpdbg_frame_t frame;                        /* frame */
 	uint32_t last_line;                          /* last executed line */
 
diff --git a/sapi/phpdbg/phpdbg_prompt.c b/sapi/phpdbg/phpdbg_prompt.c
index ac3fb67dbd..11af5bc790 100644
--- a/sapi/phpdbg/phpdbg_prompt.c
+++ b/sapi/phpdbg/phpdbg_prompt.c
@@ -24,6 +24,7 @@
 #include "zend_compile.h"
 #include "zend_exceptions.h"
 #include "zend_vm.h"
+#include "zend_generators.h"
 #include "phpdbg.h"
 
 #include "phpdbg_help.h"
@@ -647,6 +648,7 @@ PHPDBG_COMMAND(run) /* {{{ */
 		} else {
 			zend_rebuild_symbol_table();
 		}
+		PHPDBG_G(handled_exception) = NULL;
 
 		/* clean seek state */
 		PHPDBG_G(flags) &= ~PHPDBG_SEEK_MASK;
@@ -1376,7 +1378,12 @@ void phpdbg_clean(zend_bool full) /* {{{ */
 	}
 } /* }}} */
 
+/* code may behave weirdly if EG(exception) is set */
 #define DO_INTERACTIVE(allow_async_unsafe) do { \
+	if (exception) { \
+		++GC_REFCOUNT(exception); \
+		zend_clear_exception(); \
+	} \
 	if (!(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) { \
 		const char *file_char = zend_get_executed_filename(); \
 		zend_string *file = zend_string_init(file_char, strlen(file_char), 0); \
@@ -1385,6 +1392,13 @@ void phpdbg_clean(zend_bool full) /* {{{ */
 	} \
 	\
 	switch (phpdbg_interactive(allow_async_unsafe)) { \
+		zval zv; \
+		default: \
+			if (exception) { \
+				Z_OBJ(zv) = exception; \
+				zend_throw_exception_internal(&zv); \
+			} \
+			/* fallthrough */ \
 		case PHPDBG_LEAVE: \
 		case PHPDBG_FINISH: \
 		case PHPDBG_UNTIL: \
@@ -1408,6 +1422,8 @@ void phpdbg_execute_ex(zend_execute_data *execute_data) /* {{{ */
 	PHPDBG_G(in_execution) = 1;
 
 	while (1) {
+		zend_object *exception = EG(exception);
+
 		if ((PHPDBG_G(flags) & PHPDBG_BP_RESOLVE_MASK)) {
 			/* resolve nth opline breakpoints */
 			phpdbg_resolve_op_array_breaks(&execute_data->func->op_array);
@@ -1419,6 +1435,28 @@ void phpdbg_execute_ex(zend_execute_data *execute_data) /* {{{ */
 		}
 #endif
 
+		/* check for uncaught exceptions */
+		if (exception && PHPDBG_G(handled_exception) != exception) {
+			zend_execute_data *prev_ex = execute_data;
+
+			do {
+				prev_ex = zend_generator_check_placeholder_frame(prev_ex);
+				/* assuming that no internal functions will silently swallow exceptions ... */
+				if (!prev_ex->func || !ZEND_USER_CODE(prev_ex->func->common.type)) {
+					continue;
+				}
+
+				if (phpdbg_check_caught_ex(prev_ex)) {
+					goto ex_is_caught;
+				}
+			} while ((prev_ex = prev_ex->prev_execute_data));
+
+			PHPDBG_G(handled_exception) = EG(exception);
+			phpdbg_error("exception", "name=\"%s\"", "Uncaught exception %s", exception->ce->name->val);
+			DO_INTERACTIVE(1);
+		}
+ex_is_caught:
+
 		/* allow conditional breakpoints and
 			initialization to access the vm uninterrupted */
 		if ((PHPDBG_G(flags) & PHPDBG_IN_COND_BP) ||
@@ -1540,6 +1578,7 @@ next:
 
 /* only if *not* interactive and while executing */
 void phpdbg_force_interruption(void) /* {{{ */ {
+	zend_object *exception = EG(exception);
 	zend_execute_data *data = EG(current_execute_data); /* should be always readable if not NULL */
 
 	PHPDBG_G(flags) |= PHPDBG_IN_SIGNAL_HANDLER;
@@ -1581,4 +1620,3 @@ PHPDBG_COMMAND(eol) /* {{{ */
 
 	return SUCCESS;
 } /* }}} */
-
diff --git a/sapi/phpdbg/phpdbg_utils.c b/sapi/phpdbg/phpdbg_utils.c
index e1f6c59502..fce042a225 100644
--- a/sapi/phpdbg/phpdbg_utils.c
+++ b/sapi/phpdbg/phpdbg_utils.c
@@ -726,8 +726,8 @@ PHPDBG_API zend_bool phpdbg_check_caught_ex(zend_execute_data *ex) {
 
 	op_num = op - op_array->opcodes;
 
-	for (i = 0; i < op_array->last_try_catch && op_array->try_catch_array[i].try_op > op_num; i++) {
-		if (op_num < op_array->try_catch_array[i].catch_op || op_num < op_array->try_catch_array[i].finally_op) {
+	for (i = 0; i < op_array->last_try_catch && op_array->try_catch_array[i].try_op < op_num; i++) {
+		if (op_num <= op_array->try_catch_array[i].catch_op || op_num <= op_array->try_catch_array[i].finally_op) {
 			return 1;
 		}
 	}