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Improve breakpoint generator of the debugger. (#1652)

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Now the debugger generates a breakpoint for each function before
its first executable statement. This allows inspecting the function
arguments. Position (line and column) info is also added which
simplifies finding of anonymus functions. Several tests were
update to check more corner cases.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2017-03-13 11:36:34 +01:00
committed by GitHub
parent 57ea06782b
commit 679500b327
30 changed files with 409 additions and 226 deletions
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jerry-core/parser/js/js-parser.c
+29 -23
View File
@@ -1251,8 +1251,8 @@ parser_post_processing (parser_context_t *context_p) /**< context */
uint16_t initialized_var_end;
uint16_t const_literal_end;
parser_mem_page_t *page_p;
parser_mem_page_t *last_page_p = context_p->byte_code.last_p;
size_t last_position = context_p->byte_code.last_position;
parser_mem_page_t *last_page_p;
size_t last_position;
size_t offset;
size_t length;
size_t total_size;
@@ -1273,6 +1273,18 @@ parser_post_processing (parser_context_t *context_p) /**< context */
JERRY_ASSERT (context_p->literal_count <= PARSER_MAXIMUM_NUMBER_OF_LITERALS);
#ifdef JERRY_DEBUGGER
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
&& !(context_p->status_flags & PARSER_DEBUGGER_BREAKPOINT_APPENDED))
{
/* Always provide at least one breakpoint. */
parser_emit_cbc (context_p, CBC_BREAKPOINT_DISABLED);
parser_flush_cbc (context_p);
parser_append_breakpoint_info (context_p, JERRY_DEBUGGER_BREAKPOINT_LIST, context_p->token.line);
context_p->last_breakpoint_line = context_p->token.line;
}
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
&& context_p->breakpoint_info_count > 0)
{
@@ -1281,6 +1293,9 @@ parser_post_processing (parser_context_t *context_p) /**< context */
}
#endif /* JERRY_DEBUGGER */
last_page_p = context_p->byte_code.last_p;
last_position = context_p->byte_code.last_position;
initializers_length = parser_compute_indicies (context_p,
&ident_end,
&uninitialized_var_end,
@@ -1897,7 +1912,6 @@ parser_parse_source (const uint8_t *source_p, /**< valid UTF-8 source code */
#ifdef JERRY_DEBUGGER
context.breakpoint_info_count = 0;
context.last_breakpoint_line = 0;
#endif /* JERRY_DEBUGGER */
PARSER_TRY (context.try_buffer)
@@ -2047,22 +2061,8 @@ parser_parse_function (parser_context_t *context_p, /**< context */
#endif /* PARSER_DUMP_BYTE_CODE */
#ifdef JERRY_DEBUGGER
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
{
/* This option has a high memory and performance costs,
* but it is necessary for executing eval operations by the debugger. */
context_p->status_flags |= PARSER_LEXICAL_ENV_NEEDED | PARSER_NO_REG_STORE;
if (context_p->line != context_p->last_breakpoint_line)
{
parser_emit_cbc (context_p, CBC_BREAKPOINT_DISABLED);
parser_flush_cbc (context_p);
parser_append_breakpoint_info (context_p, JERRY_DEBUGGER_BREAKPOINT_LIST, context_p->line);
context_p->last_breakpoint_line = context_p->line;
}
}
parser_line_counter_t debugger_line = context_p->token.line;
parser_line_counter_t debugger_column = context_p->token.column;
#endif /* JERRY_DEBUGGER */
lexer_next_token (context_p);
@@ -2078,8 +2078,9 @@ parser_parse_function (parser_context_t *context_p, /**< context */
#ifdef JERRY_DEBUGGER
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
{
jerry_debugger_send_function_name (context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
jerry_debugger_send_string (JERRY_DEBUGGER_FUNCTION_NAME,
context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
}
#endif /* JERRY_DEBUGGER */
@@ -2101,9 +2102,12 @@ parser_parse_function (parser_context_t *context_p, /**< context */
}
#ifdef JERRY_DEBUGGER
if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
&& jerry_debugger_send_parse_function (debugger_line, debugger_column))
{
jerry_debugger_send_type (JERRY_DEBUGGER_PARSE_FUNCTION);
/* This option has a high memory and performance costs,
* but it is necessary for executing eval operations by the debugger. */
context_p->status_flags |= PARSER_LEXICAL_ENV_NEEDED | PARSER_NO_REG_STORE;
}
#endif /* JERRY_DEBUGGER */
@@ -2317,6 +2321,8 @@ parser_append_breakpoint_info (parser_context_t *context_p, /**< context */
{
JERRY_ASSERT (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED);
context_p->status_flags |= PARSER_DEBUGGER_BREAKPOINT_APPENDED;
if (context_p->breakpoint_info_count >= JERRY_DEBUGGER_SEND_MAX (parser_list_t))
{
parser_send_breakpoints (context_p, type);