/Gs (Control Stack Checking Calls)
Controls stack probes.
/Gs[size]
This option is an advanced feature to control stack probes. A stack probe is a sequence of code the compiler inserts into every function call. When activated, a stack probe reaches benignly into memory by the amount of space required to store the associated function's local variables.
If a function requires more than size bytes of stack space for local variables, its stack probe is activated. The default value of size is the size of one page:
4 KB for x86
4 KB for x64
8 KB for Itanium
This value allows an application and the Windows memory manager to increase the amount of memory committed to the program stack at run time.
 Note: |
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The default value of size allows the program stack of applications for Windows to properly grow at run time. Do not change the default setting of /Gs unless you know exactly why you need to change it. |
Some programs, such as virtual device drivers, do not require this default stack-growth mechanism. In such cases, the stack probes are not necessary. You can stop the compiler from generating stack probes by setting size to a value that is larger than any function will require for local variable storage. No space is allowed between /Gs and size.
/Gs0 has the same effect as /Ge (Enable Stack Probes).
You can turn stack probes on or off by using check_stack. Note that /Gs and the check_stack pragma have no effect on standard C library routines; they affect only the functions you compile.
To set this compiler option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.
Click the C/C++ folder.
Click the Command Line property page.
Type the compiler option in the Additional Options box.
To set this compiler option programmatically
See AdditionalOptions.
