clang/test/Frontend/stack-usage-safestack.c

   1 /// Check that stack frame size warnings behave the same when safe stack is enabled
   2
   3 // REQUIRES: x86-registered-target
   4
   5 // RUN: %clang_cc1 %s -fwarn-stack-size=48 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=REGULAR %s
   6 // RUN: %clang_cc1 %s -fwarn-stack-size=1060 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=IGNORE %s
   7
   8 // RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=48 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=SAFESTACK %s
   9 // RUN: %clang_cc1 %s -fsanitize=safe-stack -fwarn-stack-size=1060 -S -o - -triple=i386-apple-darwin 2>&1 | FileCheck --check-prefix=IGNORE %s
  10
  11 extern void init(char *buf, int size);
  12 extern int use_buf(char *buf, int size);
  13
  14 // REGULAR: warning: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
  15 // SAFESTACK: warning: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
  16 // IGNORE-NOT: stack frame size ([[#]]) exceeds limit ([[#]]) in 'stackSizeWarning'
  17 void stackSizeWarning() {
  18   char buf[1024];
  19   init(buf, sizeof(buf));
  20   if (buf[0] < 42)
  21     use_buf(buf, sizeof(buf));
  22 }