author | Mario de Sousa <msousa@fe.up.pt> |
Wed, 25 Apr 2012 16:45:00 +0100 | |
changeset 535 | 70140bd7fe67 |
parent 486 | e22150ad75fd |
child 661 | f537c3315f83 |
permissions | -rw-r--r-- |
443
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1 |
/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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|
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/* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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/* |
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* Do flow control analysis of the IEC 61131-3 code. |
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* |
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* We currently only do this for IL code. |
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* This class will annotate the abstract syntax tree, by filling in the |
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* prev_il_instruction variable in the il_instruction_c, so it points to |
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* the previous il_instruction_c object in the instruction list instruction_list_c. |
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* |
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* Since IL code can contain jumps (JMP), the same il_instruction may effectively have |
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* several previous il_instructions. In order to accommodate this, each il_instruction |
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* will maintain a vector (i..e an array) of pointers to all the previous il_instructions. |
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* We do however attempt to guarantee that the first element in the vector (array) will preferentially |
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* point to the il instruction that is right before / imediately preceding the current il instructions, |
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* i.e. the first element in the array will tend to point to the previous il_instruction |
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* that is not a jump JMP IL instruction! |
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* |
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* The result will essentially be a graph of il_instruction_c objects, each |
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* pointing to the previous il_instruction_c object. |
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* |
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* The reality is we will get several independent and isolated linked lists |
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* (actually, since we now process labels correctly, this is really a graph): |
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* one for each block of IL code (e.g. inside a Function, FB or Program). |
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* Additionally, when the IL code has an expression (expression_c object), we will actually |
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* have one more isolated linked list for the IL code inside that expression. |
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* |
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* e.g. |
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* line_1: LD 1 |
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* line_2: ADD (42 |
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* line_3: ADD B |
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* line_4: ADD C |
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* line_5: ) |
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* line_6: ADD D |
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* line_7: ST E |
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* |
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* will result in two independent linked lists: |
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* main list: line_7 -> line_6 -> line2 -> line_1 |
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* expr list: lin4_4 -> line_3 -> (operand of line_2, i.e. '42') |
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* |
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* |
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* In the main list, each: |
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* line_x: IL_operation IL_operand |
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* is encoded as |
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* il_instruction_c(label, il_incomplete_instruction) |
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* these il_instruction_c objects will point back to the previous il_instruction_c object. |
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* |
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* In the expr list, each |
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* line_x: IL_operation IL_operand |
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* is encoded as |
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* il_simple_instruction_c(il_simple_instruction) |
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* these il_simple_instruction_c objects will point back to the previous il_simple_instruction_c object, |
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* except the for the first il_simple_instruction_c object in the list, which will point back to |
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* the first il_operand (in the above example, '42'), or NULL is it does not exist. |
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* |
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* |
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* label: |
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* identifier_c |
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* |
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* il_incomplete_instruction: |
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* il_simple_operation (il_simple_operation_c, il_function_call_c) |
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* | il_expression (il_expression_c) |
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* | il_jump_operation (il_jump_operation_c) |
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* | il_fb_call (il_fb_call_c) |
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* | il_formal_funct_call (il_formal_funct_call_c) |
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* | il_return_operator (RET_operator_c, RETC_operator_c, RETCN_operator_c) |
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* |
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* |
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* il_expression_c(il_expr_operator, il_operand, simple_instr_list) |
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* |
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|
101 |
* il_operand: |
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452
diff
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|
102 |
* variable (symbolic_variable_c, direct_variable_c, array_variable_c, structured_variable_c) |
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diff
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|
103 |
* | enumerated_value (enumerated_value_c) |
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diff
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|
104 |
* | constant (lots of literal classes _c) |
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parents:
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diff
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|
105 |
* |
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diff
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|
106 |
* simple_instr_list: |
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parents:
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diff
changeset
|
107 |
* list of il_simple_instruction |
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diff
changeset
|
108 |
* |
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parents:
452
diff
changeset
|
109 |
* il_simple_instruction: |
454
099aa5d655de
Finish support for semantic verification of IL paranthesised expressions.
Mario de Sousa <msousa@fe.up.pt>
parents:
453
diff
changeset
|
110 |
* il_simple_operation (il_simple_operation_c, il_function_call_c) |
453
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diff
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|
111 |
* | il_expression (il_expression_c) |
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|
112 |
* | il_formal_funct_call (il_formal_funct_call_c) |
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parents:
452
diff
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|
113 |
* |
443
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|
114 |
*/ |
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parents:
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|
115 |
|
ff4d26b7e51d
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|
116 |
#include "flow_control_analysis.hh" |
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changeset
|
117 |
|
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Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
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parents:
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changeset
|
118 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
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changeset
|
119 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
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|
120 |
/* set to 1 to see debug info during execution */ |
ff4d26b7e51d
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Mario de Sousa <msousa@fe.up.pt>
parents:
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|
121 |
static int debug = 0; |
ff4d26b7e51d
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parents:
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changeset
|
122 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
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parents:
diff
changeset
|
123 |
flow_control_analysis_c::flow_control_analysis_c(symbol_c *ignore) { |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
124 |
prev_il_instruction = NULL; |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
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parents:
457
diff
changeset
|
125 |
curr_il_instruction = NULL; |
443
ff4d26b7e51d
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Mario de Sousa <msousa@fe.up.pt>
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changeset
|
126 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
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changeset
|
127 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
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|
128 |
flow_control_analysis_c::~flow_control_analysis_c(void) { |
ff4d26b7e51d
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Mario de Sousa <msousa@fe.up.pt>
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|
129 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
130 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
131 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
132 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
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|
133 |
/************************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
134 |
/* B 1.5 Program organization units */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
135 |
/************************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
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|
136 |
/*********************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
137 |
/* B 1.5.1 Functions */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
138 |
/*********************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
139 |
void *flow_control_analysis_c::visit(function_declaration_c *symbol) { |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
140 |
search_il_label = new search_il_label_c(symbol); |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
141 |
if (debug) printf("Doing flow control analysis in body of function %s\n", ((token_c *)(symbol->derived_function_name))->value); |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
142 |
symbol->function_body->accept(*this); |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
143 |
delete search_il_label; |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
144 |
search_il_label = NULL; |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
145 |
return NULL; |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
146 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
147 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
148 |
/***************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
149 |
/* B 1.5.2 Function blocks */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
150 |
/***************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
151 |
void *flow_control_analysis_c::visit(function_block_declaration_c *symbol) { |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
152 |
search_il_label = new search_il_label_c(symbol); |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
153 |
if (debug) printf("Doing flow control analysis in body of FB %s\n", ((token_c *)(symbol->fblock_name))->value); |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
154 |
symbol->fblock_body->accept(*this); |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
155 |
delete search_il_label; |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
156 |
search_il_label = NULL; |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
157 |
return NULL; |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
158 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
159 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
160 |
/********************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
161 |
/* B 1.5.3 Programs */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
162 |
/********************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
163 |
void *flow_control_analysis_c::visit(program_declaration_c *symbol) { |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
164 |
search_il_label = new search_il_label_c(symbol); |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
165 |
if (debug) printf("Doing flow control analysis in body of program %s\n", ((token_c *)(symbol->program_type_name))->value); |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
166 |
symbol->function_block_body->accept(*this); |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
167 |
delete search_il_label; |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
168 |
search_il_label = NULL; |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
169 |
return NULL; |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
170 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
171 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
172 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
173 |
/********************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
174 |
/* B 1.7 Configuration elements */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
175 |
/********************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
176 |
void *flow_control_analysis_c::visit(configuration_declaration_c *symbol) { |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
177 |
return NULL; |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
178 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
179 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
180 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
181 |
/****************************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
182 |
/* B.2 - Language IL (Instruction List) */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
183 |
/****************************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
184 |
/***********************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
185 |
/* B 2.1 Instructions and Operands */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
186 |
/***********************************/ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
187 |
|
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
188 |
/*| instruction_list il_instruction */ |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
189 |
// SYM_LIST(instruction_list_c) |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
190 |
void *flow_control_analysis_c::visit(instruction_list_c *symbol) { |
463
fafa9abc166e
Correctly handle JMP and RET IL operators in flow control analysis.
Mario de Sousa <msousa@fe.up.pt>
parents:
459
diff
changeset
|
191 |
prev_il_instruction_is_JMP_or_RET = false; |
448
1bd18fc06911
Add support for semantic verification for implict FB calls in IL (e.g. PV ton_var)
Mario de Sousa <msousa@fe.up.pt>
parents:
443
diff
changeset
|
192 |
for(int i = 0; i < symbol->n; i++) { |
1bd18fc06911
Add support for semantic verification for implict FB calls in IL (e.g. PV ton_var)
Mario de Sousa <msousa@fe.up.pt>
parents:
443
diff
changeset
|
193 |
prev_il_instruction = NULL; |
1bd18fc06911
Add support for semantic verification for implict FB calls in IL (e.g. PV ton_var)
Mario de Sousa <msousa@fe.up.pt>
parents:
443
diff
changeset
|
194 |
if (i > 0) prev_il_instruction = symbol->elements[i-1]; |
459
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
195 |
curr_il_instruction = symbol->elements[i]; |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
196 |
curr_il_instruction->accept(*this); |
01f6664bf8c5
Continue adding support for semantic verification of JMP and RET.
Mario de Sousa <msousa@fe.up.pt>
parents:
457
diff
changeset
|
197 |
curr_il_instruction = NULL; |
443
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
198 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
199 |
return NULL; |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
200 |
} |
ff4d26b7e51d
Narrow IL code backwords, so as to correctly handle invocations to overloaded functions from IL code.
Mario de Sousa <msousa@fe.up.pt>
parents:
diff
changeset
|
201 |
|
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/* | label ':' [il_incomplete_instruction] eol_list */ |
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// SYM_REF2(il_instruction_c, label, il_instruction) |
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// void *visit(instruction_list_c *symbol); |
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205 |
void *flow_control_analysis_c::visit(il_instruction_c *symbol) { |
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if ((NULL != prev_il_instruction) && (!prev_il_instruction_is_JMP_or_RET)) |
486
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/* We try to guarantee that the previous il instruction that is in the previous line, will occupy the first element of the vector. |
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208 |
* In order to do that, we use insert() instead of push_back() |
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209 |
*/ |
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symbol->prev_il_instruction.insert(symbol->prev_il_instruction.begin() , prev_il_instruction); |
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211 |
|
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/* check if it is an il_expression_c, a JMP[C[N]], or a RET, and if so, handle it correctly */ |
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prev_il_instruction_is_JMP_or_RET = false; |
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if (NULL != symbol->il_instruction) |
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symbol->il_instruction->accept(*this); |
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return NULL; |
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217 |
} |
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218 |
|
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219 |
|
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|
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/* | il_simple_operator [il_operand] */ |
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// SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) |
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// void *flow_control_analysis_c::visit(il_simple_operation_c *symbol) |
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224 |
|
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|
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226 |
|
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227 |
/* | function_name [il_operand_list] */ |
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228 |
/* NOTE: The parameters 'called_function_declaration' and 'extensible_param_count' are used to pass data between the stage 3 and stage 4. */ |
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// SYM_REF2(il_function_call_c, function_name, il_operand_list, symbol_c *called_function_declaration; int extensible_param_count;) |
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230 |
// void *flow_control_analysis_c::visit(il_function_call_c *symbol) |
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231 |
|
443
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|
232 |
|
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233 |
/* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ |
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234 |
// SYM_REF3(il_expression_c, il_expr_operator, il_operand, simple_instr_list); |
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235 |
void *flow_control_analysis_c::visit(il_expression_c *symbol) { |
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if(NULL == symbol->simple_instr_list) |
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/* nothing to do... */ |
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238 |
return NULL; |
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|
239 |
|
459
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240 |
symbol_c *save_prev_il_instruction = prev_il_instruction; |
453
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241 |
prev_il_instruction = symbol->il_operand; |
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242 |
symbol->simple_instr_list->accept(*this); |
459
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243 |
prev_il_instruction = save_prev_il_instruction; |
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244 |
return NULL; |
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245 |
} |
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|
246 |
|
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247 |
|
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248 |
/* il_jump_operator label */ |
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249 |
// SYM_REF2(il_jump_operation_c, il_jump_operator, label) |
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250 |
void *flow_control_analysis_c::visit(il_jump_operation_c *symbol) { |
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251 |
/* search for the il_instruction_c containing the label */ |
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252 |
il_instruction_c *destination = search_il_label->find_label(symbol->label); |
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|
253 |
|
463
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|
254 |
/* give the visit(JMP_operator *) an oportunity to set the prev_il_instruction_is_JMP_or_RET flag! */ |
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|
255 |
symbol->il_jump_operator->accept(*this); |
459
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|
256 |
/* add, to that il_instruction's list of prev_il_intsructions, the curr_il_instruction */ |
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257 |
if (NULL != destination) |
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|
258 |
destination->prev_il_instruction.push_back(curr_il_instruction); |
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259 |
return NULL; |
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260 |
} |
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|
261 |
|
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|
262 |
|
443
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|
263 |
/* il_call_operator prev_declared_fb_name |
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|
264 |
* | il_call_operator prev_declared_fb_name '(' ')' |
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|
265 |
* | il_call_operator prev_declared_fb_name '(' eol_list ')' |
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|
266 |
* | il_call_operator prev_declared_fb_name '(' il_operand_list ')' |
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|
267 |
* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')' |
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|
268 |
*/ |
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|
269 |
/* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */ |
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|
270 |
// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list, symbol_c *called_fb_declaration) |
459
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|
271 |
// void *flow_control_analysis_c::visit(il_fb_call_c *symbol) |
443
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|
272 |
|
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|
273 |
|
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|
274 |
/* | function_name '(' eol_list [il_param_list] ')' */ |
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|
275 |
/* NOTE: The parameter 'called_function_declaration' is used to pass data between the stage 3 and stage 4. */ |
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|
276 |
// SYM_REF2(il_formal_funct_call_c, function_name, il_param_list, symbol_c *called_function_declaration; int extensible_param_count;) |
459
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|
277 |
// void *flow_control_analysis_c::visit(il_formal_funct_call_c *symbol) |
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|
278 |
|
443
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|
279 |
|
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|
280 |
|
452
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|
281 |
// void *visit(il_operand_list_c *symbol); |
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|
282 |
void *flow_control_analysis_c::visit(simple_instr_list_c *symbol) { |
454
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|
283 |
for(int i = 0; i < symbol->n; i++) { |
453
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|
284 |
/* The prev_il_instruction for element[0] was set in visit(il_expression_c *) */ |
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|
285 |
if (i>0) prev_il_instruction = symbol->elements[i-1]; |
452
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|
286 |
symbol->elements[i]->accept(*this); |
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|
287 |
} |
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|
288 |
return NULL; |
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|
289 |
} |
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|
290 |
|
453
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|
291 |
|
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|
292 |
// SYM_REF1(il_simple_instruction_c, il_simple_instruction, symbol_c *prev_il_instruction;) |
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|
293 |
void *flow_control_analysis_c::visit(il_simple_instruction_c*symbol) { |
459
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|
294 |
if (NULL != prev_il_instruction) |
486
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|
295 |
/* We try to guarantee that the previous il instruction that is in the previous line, will occupy the first element of the vector. |
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|
296 |
* In order to do that, we use insert() instead of push_back() |
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|
297 |
*/ |
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|
298 |
symbol->prev_il_instruction.insert(symbol->prev_il_instruction.begin() , prev_il_instruction); |
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return NULL; |
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} |
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|
443
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/* |
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void *visit(il_param_list_c *symbol); |
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void *visit(il_param_assignment_c *symbol); |
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void *visit(il_param_out_assignment_c *symbol); |
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*/ |
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|
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|
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|
459
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|
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/*******************/ |
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/* B 2.2 Operators */ |
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/*******************/ |
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// void *visit( LD_operator_c *symbol); |
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// void *visit( LDN_operator_c *symbol); |
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// void *visit( ST_operator_c *symbol); |
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// void *visit( STN_operator_c *symbol); |
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// void *visit( NOT_operator_c *symbol); |
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// void *visit( S_operator_c *symbol); |
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// void *visit( R_operator_c *symbol); |
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// void *visit( S1_operator_c *symbol); |
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// void *visit( R1_operator_c *symbol); |
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// void *visit( CLK_operator_c *symbol); |
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// void *visit( CU_operator_c *symbol); |
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// void *visit( CD_operator_c *symbol); |
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// void *visit( PV_operator_c *symbol); |
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// void *visit( IN_operator_c *symbol); |
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// void *visit( PT_operator_c *symbol); |
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// void *visit( AND_operator_c *symbol); |
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// void *visit( OR_operator_c *symbol); |
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// void *visit( XOR_operator_c *symbol); |
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// void *visit( ANDN_operator_c *symbol); |
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// void *visit( ORN_operator_c *symbol); |
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// void *visit( XORN_operator_c *symbol); |
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// void *visit( ADD_operator_c *symbol); |
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// void *visit( SUB_operator_c *symbol); |
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// void *visit( MUL_operator_c *symbol); |
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// void *visit( DIV_operator_c *symbol); |
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// void *visit( MOD_operator_c *symbol); |
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// void *visit( GT_operator_c *symbol); |
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// void *visit( GE_operator_c *symbol); |
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// void *visit( EQ_operator_c *symbol); |
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// void *visit( LT_operator_c *symbol); |
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// void *visit( LE_operator_c *symbol); |
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// void *visit( NE_operator_c *symbol); |
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// void *visit( CAL_operator_c *symbol); |
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// void *visit( CALC_operator_c *symbol); |
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// void *visit(CALCN_operator_c *symbol); |
463
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|
350 |
|
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|
351 |
/* this next visit function will be called directly from visit(il_instruction_c *) */ |
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void *flow_control_analysis_c::visit( RET_operator_c *symbol) { |
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prev_il_instruction_is_JMP_or_RET = true; |
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354 |
return NULL; |
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|
355 |
} |
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Correctly handle JMP and RET IL operators in flow control analysis.
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|
356 |
|
459
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|
357 |
// void *visit( RETC_operator_c *symbol); |
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|
358 |
// void *visit(RETCN_operator_c *symbol); |
463
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|
359 |
|
fafa9abc166e
Correctly handle JMP and RET IL operators in flow control analysis.
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|
360 |
/* this next visit function will be called from visit(il_jump_operation_c *) */ |
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Correctly handle JMP and RET IL operators in flow control analysis.
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|
361 |
void *flow_control_analysis_c::visit( JMP_operator_c *symbol) { |
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|
362 |
prev_il_instruction_is_JMP_or_RET = true; |
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Correctly handle JMP and RET IL operators in flow control analysis.
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|
363 |
return NULL; |
fafa9abc166e
Correctly handle JMP and RET IL operators in flow control analysis.
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|
364 |
} |
fafa9abc166e
Correctly handle JMP and RET IL operators in flow control analysis.
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diff
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|
365 |
|
459
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|
366 |
// void *visit( JMPC_operator_c *symbol); |
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|
367 |
// void *visit(JMPCN_operator_c *symbol); |
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|
368 |
|
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|
369 |
/* Symbol class handled together with function call checks */ |
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|
370 |
// void *visit(il_assign_operator_c *symbol, variable_name); |
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|
371 |
/* Symbol class handled together with function call checks */ |
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|
372 |
// void *visit(il_assign_operator_c *symbol, option, variable_name); |
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|
373 |