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front end optimization&stack overflow prompt

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change parameter type to avoid unnecessary copies of string.
change stack depth from 65536<<4 to 16+(65536<<2).
now you could know stack overflow when it happens
This commit is contained in:
Valk Richard Li
2021-06-07 23:53:43 +08:00
parent a3dbaebfd8
commit 166fe32839
10 changed files with 172 additions and 396 deletions
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nasal_gc.h
+6 -8
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@@ -242,11 +242,11 @@ std::string nasal_val::to_string()
struct nasal_gc
{
#define STACK_MAX_DEPTH (65536<<4)
#define STACK_MAX_DEPTH (65536<<2)
nasal_val* zero_addr; // reserved address of nasal_val,type vm_num, 0
nasal_val* one_addr; // reserved address of nasal_val,type vm_num, 1
nasal_val* nil_addr; // reserved address of nasal_val,type vm_nil
nasal_val* val_stack[STACK_MAX_DEPTH];
nasal_val* val_stack[STACK_MAX_DEPTH+16];// 16 reserved to avoid stack overflow
nasal_val** stack_top; // stack top
std::vector<nasal_val*> num_addrs; // reserved address for const vm_num
std::vector<nasal_val*> str_addrs; // reserved address for const vm_str
@@ -344,17 +344,15 @@ void nasal_gc::gc_init(std::vector<double>& nums,std::vector<std::string>& strs)
num_addrs.resize(nums.size());
for(int i=0;i<nums.size();++i)
{
nasal_val* tmp=new nasal_val(vm_num);
tmp->ptr.num=nums[i];
num_addrs[i]=tmp;
num_addrs[i]=new nasal_val(vm_num);
num_addrs[i]->ptr.num=nums[i];
}
// init constant strings
str_addrs.resize(strs.size());
for(int i=0;i<strs.size();++i)
{
nasal_val* tmp=new nasal_val(vm_str);
*tmp->ptr.str=strs[i];
str_addrs[i]=tmp;
str_addrs[i]=new nasal_val(vm_str);
*str_addrs[i]->ptr.str=strs[i];
}
return;
}