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add an assert to catch corrupted memory

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This commit is contained in:
Andrew Kelley 2017-11-25 16:34:08 -05:00
parent b390929826
commit 48ebb65cc7
1 changed files with 32 additions and 22 deletions
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54
src/ir.cpp
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@ -10351,30 +10351,40 @@ static IrInstruction *ir_get_var_ptr(IrAnalyze *ira, IrInstruction *instruction,
bool is_const = (var->value->type->id == TypeTableEntryIdMetaType) ? is_const_ptr : var->src_is_const;
bool is_volatile = (var->value->type->id == TypeTableEntryIdMetaType) ? is_volatile_ptr : false;
if (mem_slot && mem_slot->special != ConstValSpecialRuntime) {
ConstPtrMut ptr_mut;
if (comptime_var_mem) {
ptr_mut = ConstPtrMutComptimeVar;
} else if (var->gen_is_const) {
ptr_mut = ConstPtrMutComptimeConst;
} else {
assert(!comptime_var_mem);
ptr_mut = ConstPtrMutRuntimeVar;
if (mem_slot != nullptr) {
switch (mem_slot->special) {
case ConstValSpecialRuntime:
goto no_mem_slot;
case ConstValSpecialStatic: // fallthrough
case ConstValSpecialUndef: {
ConstPtrMut ptr_mut;
if (comptime_var_mem) {
ptr_mut = ConstPtrMutComptimeVar;
} else if (var->gen_is_const) {
ptr_mut = ConstPtrMutComptimeConst;
} else {
assert(!comptime_var_mem);
ptr_mut = ConstPtrMutRuntimeVar;
}
return ir_get_const_ptr(ira, instruction, mem_slot, var->value->type,
ptr_mut, is_const, is_volatile, var->align_bytes);
}
}
return ir_get_const_ptr(ira, instruction, mem_slot, var->value->type,
ptr_mut, is_const, is_volatile, var->align_bytes);
} else {
IrInstruction *var_ptr_instruction = ir_build_var_ptr(&ira->new_irb,
instruction->scope, instruction->source_node, var, is_const, is_volatile);
var_ptr_instruction->value.type = get_pointer_to_type_extra(ira->codegen, var->value->type,
var->src_is_const, is_volatile, var->align_bytes, 0, 0);
type_ensure_zero_bits_known(ira->codegen, var->value->type);
bool in_fn_scope = (scope_fn_entry(var->parent_scope) != nullptr);
var_ptr_instruction->value.data.rh_ptr = in_fn_scope ? RuntimeHintPtrStack : RuntimeHintPtrNonStack;
return var_ptr_instruction;
zig_unreachable();
}
no_mem_slot:
IrInstruction *var_ptr_instruction = ir_build_var_ptr(&ira->new_irb,
instruction->scope, instruction->source_node, var, is_const, is_volatile);
var_ptr_instruction->value.type = get_pointer_to_type_extra(ira->codegen, var->value->type,
var->src_is_const, is_volatile, var->align_bytes, 0, 0);
type_ensure_zero_bits_known(ira->codegen, var->value->type);
bool in_fn_scope = (scope_fn_entry(var->parent_scope) != nullptr);
var_ptr_instruction->value.data.rh_ptr = in_fn_scope ? RuntimeHintPtrStack : RuntimeHintPtrNonStack;
return var_ptr_instruction;
}
static TypeTableEntry *ir_analyze_fn_call(IrAnalyze *ira, IrInstructionCall *call_instruction,