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Return values saved in history

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On some contexts, we need to call one function to free some resource
allocated by another function based on the return value of the second
function. For example, every time pthread_mutex_trylock suceeds, you
need to unlock it, and only in those cases. While this could be done
with the return value sequence, it does not really work for a sequence
of custom fakes. Now we save the return values in the member
return_val_history, which works pretty much like arg_history, only
for the return values.
This commit is contained in:
Paulo Antonio Alvarez
2017-08-15 23:36:49 -03:00
parent 74c07a8f66
commit 89ea0e10d8
1 changed files with 27 additions and 1 deletions
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28
fakegen.rb
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@@ -37,8 +37,10 @@ def output_internal_helper_macros
define_reset_fake_macro
define_declare_arg_helper
define_declare_all_func_common_helper
define_declare_return_value_history
define_save_arg_helper
define_room_for_more_history
define_save_ret_history_helper
define_save_arg_history_helper
define_history_dropped_helper
define_value_function_variables_helper
@@ -88,12 +90,25 @@ def define_declare_all_func_common_helper
putd " unsigned int arg_histories_dropped; \\"
end
def define_declare_return_value_history
putd ""
putd "#define DECLARE_RETURN_VALUE_HISTORY(RETURN_TYPE) \\"
putd " RETURN_TYPE return_val_history[FFF_ARG_HISTORY_LEN];"
end
def define_save_arg_helper
putd ""
putd "#define SAVE_ARG(FUNCNAME, n) \\"
putd " memcpy((void*)&FUNCNAME##_fake.arg##n##_val, (void*)&arg##n, sizeof(arg##n));"
end
def define_save_ret_history_helper
putd ""
putd "#define SAVE_RET_HISTORY(FUNCNAME, RETVAL) \\"
putd " if ((FUNCNAME##_fake.call_count - 1) < FFF_ARG_HISTORY_LEN) \\"
putd " memcpy((void *)&FUNCNAME##_fake.return_val_history[FUNCNAME##_fake.call_count - 1], (const void *) &RETVAL, sizeof(RETVAL)); \\"
end
def define_room_for_more_history
putd ""
putd "#define ROOM_FOR_MORE_HISTORY(FUNCNAME) \\"
@@ -139,10 +154,13 @@ def define_return_fake_result_helper
putd "#define RETURN_FAKE_RESULT(FUNCNAME) \\"
putd " if (FUNCNAME##_fake.return_val_seq_len){ /* then its a sequence */ \\"
putd " if(FUNCNAME##_fake.return_val_seq_idx < FUNCNAME##_fake.return_val_seq_len) { \\"
putd " SAVE_RET_HISTORY(FUNCNAME, FUNCNAME##_fake.return_val_seq[FUNCNAME##_fake.return_val_seq_idx]) \\"
putd " return FUNCNAME##_fake.return_val_seq[FUNCNAME##_fake.return_val_seq_idx++]; \\"
putd " } \\"
putd " SAVE_RET_HISTORY(FUNCNAME, FUNCNAME##_fake.return_val_seq[FUNCNAME##_fake.return_val_seq_len-1]) \\"
putd " return FUNCNAME##_fake.return_val_seq[FUNCNAME##_fake.return_val_seq_len-1]; /* return last element */ \\"
putd " } \\"
putd " SAVE_RET_HISTORY(FUNCNAME, FUNCNAME##_fake.return_val) \\"
putd " return FUNCNAME##_fake.return_val; \\"
end
@@ -261,6 +279,7 @@ def output_variables(arg_count, has_varargs, is_value_function)
}
putd "DECLARE_ALL_FUNC_COMMON \\"
putd "DECLARE_VALUE_FUNCTION_VARIABLES(RETURN_TYPE) \\" unless not is_value_function
putd "DECLARE_RETURN_VALUE_HISTORY(RETURN_TYPE) \\" unless not is_value_function
putd "DECLARE_CUSTOM_FAKE_SEQ_VARIABLES \\"
output_custom_function_signature(arg_count, has_varargs, is_value_function)
output_custom_function_array(arg_count, has_varargs, is_value_function)
@@ -330,15 +349,22 @@ def output_function_body(arg_count, has_varargs, is_value_function)
putd " #{custom_fake_call}\\"
end
putd " va_end(ap);\\"
putd " SAVE_RET_HISTORY(FUNCNAME, ret); \\" unless not is_value_function
putd " return ret;\\" if is_value_function
putd "}\\"
else
return_type = is_value_function ? "return " : ""
putd "if (FUNCNAME##_fake.custom_fake_seq_len){ /* a sequence of custom fakes */ \\"
putd " if (FUNCNAME##_fake.custom_fake_seq_idx < FUNCNAME##_fake.custom_fake_seq_len){ \\"
putd " #{return_type}FUNCNAME##_fake.custom_fake_seq[FUNCNAME##_fake.custom_fake_seq_idx++](#{arg_list(arg_count)}); \\"
putd " RETURN_TYPE ret = FUNCNAME##_fake.custom_fake_seq[FUNCNAME##_fake.custom_fake_seq_idx++](#{arg_list(arg_count)}); \\" unless not is_value_function
putd " SAVE_RET_HISTORY(FUNCNAME, ret); \\" unless not is_value_function
putd " return ret; \\" unless not is_value_function
putd " #{return_type}FUNCNAME##_fake.custom_fake_seq[FUNCNAME##_fake.custom_fake_seq_idx++](#{arg_list(arg_count)}); \\" unless is_value_function
putd " } \\"
putd " else{ \\"
putd " RETURN_TYPE ret = FUNCNAME##_fake.custom_fake_seq[FUNCNAME##_fake.custom_fake_seq_len-1](#{arg_list(arg_count)}); \\" unless not is_value_function
putd " SAVE_RET_HISTORY(FUNCNAME, ret); \\" unless not is_value_function
putd " return ret; \\" unless not is_value_function
putd " #{return_type}FUNCNAME##_fake.custom_fake_seq[FUNCNAME##_fake.custom_fake_seq_len-1](#{arg_list(arg_count)}); \\"
putd " } \\"
putd "} \\"