clang/test/Driver/stack-clash-protection.c

   1 // RUN: %clang -target i386-unknown-linux -fstack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-i386
   2 // RUN: %clang -target i386-unknown-linux -fno-stack-clash-protection -fstack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-i386
   3 // RUN: %clang -target i386-unknown-linux -fstack-clash-protection -fno-stack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-i386-NO
   4 // SCP-i386: "-fstack-clash-protection"
   5 // SCP-i386-NO-NOT: "-fstack-clash-protection"
   6
   7 // RUN: %clang -target x86_64-scei-linux -fstack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-x86
   8 // RUN: %clang -target x86_64-unknown-freebsd -fstack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-x86
   9 // SCP-x86: "-fstack-clash-protection"
  10
  11 // RUN: %clang -target armv7k-apple-linux -fstack-clash-protection -### %s 2>&1 | FileCheck %s -check-prefix=SCP-armv7
  12 // SCP-armv7-NOT: "-fstack-clash-protection"
  13 // SCP-armv7: argument unused during compilation: '-fstack-clash-protection'
  14
  15 // RUN: %clang -target x86_64-unknown-linux -fstack-clash-protection -S -emit-llvm -o %t.ll %s 2>&1 | FileCheck %s -check-prefix=SCP-warn
  16 // SCP-warn: warning: Unable to protect inline asm that clobbers stack pointer against stack clash
  17
  18 // RUN: %clang -target x86_64-pc-unknown-linux -fstack-clash-protection -S -emit-llvm -o- %s | FileCheck %s -check-prefix=SCP-ll-linux64
  19 // SCP-ll-linux64: attributes {{.*}} "probe-stack"="inline-asm"
  20
  21 // RUN: %clang -target x86_64-pc-windows-msvc -fstack-clash-protection -S -emit-llvm -o- %s 2>&1 | FileCheck %s -check-prefix=SCP-ll-win64
  22 // SCP-ll-win64-NOT: attributes {{.*}} "probe-stack"="inline-asm"
  23 // SCP-ll-win64: argument unused during compilation: '-fstack-clash-protection'
  24
  25 int foo(int c) {
  26   int r;
  27   __asm__("sub %0, %%rsp"
  28           :
  29           : "rm"(c)
  30           : "rsp");
  31   __asm__("mov %%rsp, %0"
  32           : "=rm"(r)::);
  33   return r;
  34 }