# Decrease "stack level too deep" in Windows

**URL:** <https://www.ruby-forum.com/t/decrease-stack-level-too-deep-in-windows/68565>\
**Category:** Development\
**Created:** [September 13, 2006, 5:21pm UTC](https://www.ruby-forum.com/t/decrease-stack-level-too-deep-in-windows/68565 "2006-09-13T17:21:39Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![U.Nakamura](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/b5ac83/32.png) [@U.Nakamura](https://www.ruby-forum.com/u/U.Nakamura)\
**Post date:** [September 13, 2006, 5:21pm UTC](https://www.ruby-forum.com/t/decrease-stack-level-too-deep-in-windows/68565/1 "2006-09-13T17:21:39Z")

</div>

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ruby -e “def hoge(n); p n; hoge(n + 1); end; hoge(0)”  
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# Index: gc.c

RCS file: /home/cvs/ruby/gc.c,v  
retrieving revision 1.243  
diff -u -1 -p -r1.243 gc.c  
— gc.c 7 Aug 2006 03:37:46 -0000 1.243  
+++ gc.c 13 Sep 2006 15:14:51 -0000  
@@ -472,3 +472,3 @@ unsigned int \_stacksize = 262144;

# undef HAVE\_GETRLIMIT

-#elif defined(HAVE\_GETRLIMIT)  
+#elif defined(HAVE\_GETRLIMIT) || defined(\_WIN32)  
static unsigned int STACK\_LEVEL\_MAX = 655300;  
@@ -1540,2 +1540,15 @@ void ruby\_init\_stack(VALUE \*addr  
}  
+#elif defined \_WIN32

- {
- MEMORY\_BASIC\_INFORMATION mi;
- DWORD size;
- DWORD space;
- 
- if (VirtualQuery(&mi, &mi, sizeof(mi))) {
- 

```
  size = (char *)mi.BaseAddress - (char *)mi.AllocationBase;

```

- 

```
  space = size / 5;

```

- 

```
  if (space > 1024*1024) space = 1024*1024;

```

- 

```
  STACK_LEVEL_MAX = (size - space) / sizeof(VALUE);

```

- }
- }  
#endif

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---

<div class="post-metadata">

**Author:** ![U.Nakamura](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/b5ac83/32.png) [@U.Nakamura](https://www.ruby-forum.com/u/U.Nakamura)\
**Post date:** [September 13, 2006, 5:59pm UTC](https://www.ruby-forum.com/t/decrease-stack-level-too-deep-in-windows/68565/2 "2006-09-13T17:59:46Z")

</div>

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In message “Re: [ruby-dev:29569] decrease “stack level too deep” in  
Windows”  
on Thu, 14 Sep 2006 00:20:05 +0900, “U.Nakamura”  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

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|e$B$N$G$9$,!"2r7h$9$k%Q%C%A$r:n$C$F$\_$^$7$?!#e(B

|Windowse$B$K$7$+1F6A$J$$$O$:$J$s$G$9$,!"F~$l$F$b$$$$$G$7$g$&$+e(B?

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