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Add line info support. (#2286)

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Add line info data to byte, which allows getting a backtrace info directly
from the engine. Snapshots are not supported.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2018-04-19 02:12:54 +02:00
committed by yichoi
parent 095b730f9d
commit 5e097dc354
24 changed files with 773 additions and 52 deletions
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jerry-core/vm/vm.c
+50 -32
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@@ -2596,6 +2596,52 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
#endif /* JERRY_DEBUGGER */
continue;
}
#ifdef JERRY_ENABLE_LINE_INFO
case VM_OC_RESOURCE_NAME:
{
ecma_length_t formal_params_number = 0;
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_NON_STRICT_ARGUMENTS_NEEDED)
{
if (bytecode_header_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
{
cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_header_p;
formal_params_number = args_p->argument_end;
}
else
{
cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_header_p;
formal_params_number = args_p->argument_end;
}
}
uint8_t *byte_p = (uint8_t *) bytecode_header_p;
byte_p += ((size_t) bytecode_header_p->size) << JMEM_ALIGNMENT_LOG;
ecma_value_t *resource_name_p = (ecma_value_t *) byte_p;
resource_name_p -= formal_params_number;
frame_ctx_p->resource_name = resource_name_p[-1];
continue;
}
case VM_OC_LINE:
{
uint32_t value = 0;
uint8_t byte;
do
{
byte = *byte_code_p++;
value = (value << 7) | (byte & CBC_LOWER_SEVEN_BIT_MASK);
}
while (byte & CBC_HIGHEST_BIT_MASK);
frame_ctx_p->current_line = value;
continue;
}
#endif /* JERRY_ENABLE_LINE_INFO */
default:
{
JERRY_UNREACHABLE ();
@@ -2990,6 +3036,10 @@ vm_run (const ecma_compiled_code_t *bytecode_header_p, /**< byte-code data heade
frame_ctx.lex_env_p = lex_env_p;
frame_ctx.prev_context_p = JERRY_CONTEXT (vm_top_context_p);
frame_ctx.this_binding = this_binding_value;
#ifdef JERRY_ENABLE_LINE_INFO
frame_ctx.resource_name = ECMA_VALUE_UNDEFINED;
frame_ctx.current_line = 0;
#endif /* JERRY_ENABLE_LINE_INFO */
frame_ctx.context_depth = 0;
frame_ctx.is_eval_code = is_eval_code;
frame_ctx.call_operation = VM_NO_EXEC_OP;
@@ -3001,38 +3051,6 @@ vm_run (const ecma_compiled_code_t *bytecode_header_p, /**< byte-code data heade
return vm_execute (&frame_ctx, arg_list_p, arg_list_len);
} /* vm_run */
/**
* Check whether currently executed code is strict mode code
*
* @return true - current code is executed in strict mode,
* false - otherwise
*/
bool
vm_is_strict_mode (void)
{
JERRY_ASSERT (JERRY_CONTEXT (vm_top_context_p) != NULL);
return JERRY_CONTEXT (vm_top_context_p)->bytecode_header_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE;
} /* vm_is_strict_mode */
/**
* Check whether currently performed call (on top of call-stack) is performed in form,
* meeting conditions of 'Direct Call to Eval' (see also: ECMA-262 v5, 15.1.2.1.1)
*
* Warning:
* the function should only be called from implementation
* of built-in 'eval' routine of Global object
*
* @return true - currently performed call is performed through 'eval' identifier,
* without 'this' argument,
* false - otherwise
*/
inline bool __attr_always_inline___
vm_is_direct_eval_form_call (void)
{
return (JERRY_CONTEXT (status_flags) & ECMA_STATUS_DIRECT_EVAL) != 0;
} /* vm_is_direct_eval_form_call */
/**
* @}
* @}