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Validate type of all instructions, log validation failures at load.

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The validator now checks that the type of conditional instructions
is known.
On a validation failure, the load code now outputs a corrupt savegame
message, with the validation error message and a program dump,
instead of using an assertion.
This commit is contained in:
Jonathan G Rennison
2015-09-02 20:51:30 +01:00
parent d9acfc4599
commit 73b69c5594
2 changed files with 34 additions and 3 deletions
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19
src/tracerestrict.cpp
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@@ -414,7 +414,7 @@ void TraceRestrictProgram::DecrementRefCount() {
* Validate a instruction list
* Returns successful result if program seems OK
* This only validates that conditional nesting is correct,
* and that all non-conditionals have a known type, at present
* and that all instructions have a known type, at present
*/
CommandCost TraceRestrictProgram::Validate(const std::vector<TraceRestrictItem> &items, TraceRestrictProgramActionsUsedFlags &actions_used_flags) {
// static to avoid needing to re-alloc/resize on each execution
@@ -464,6 +464,23 @@ CommandCost TraceRestrictProgram::Validate(const std::vector<TraceRestrictItem>
}
HandleCondition(condstack, condflags, true);
}
switch (GetTraceRestrictType(item)) {
case TRIT_COND_ENDIF:
case TRIT_COND_UNDEFINED:
case TRIT_COND_TRAIN_LENGTH:
case TRIT_COND_MAX_SPEED:
case TRIT_COND_CURRENT_ORDER:
case TRIT_COND_NEXT_ORDER:
case TRIT_COND_LAST_STATION:
case TRIT_COND_CARGO:
case TRIT_COND_ENTRY_DIRECTION:
case TRIT_COND_PBS_ENTRY_SIGNAL:
break;
default:
return_cmd_error(STR_TRACE_RESTRICT_ERROR_VALIDATE_UNKNOWN_INSTRUCTION);
}
} else {
switch (GetTraceRestrictType(item)) {
case TRIT_PF_DENY: