bolt/test/runtime/bolt-reserved.cpp

   1 // REQUIRES: system-linux
   2
   3 /*
   4  * Check that llvm-bolt uses reserved space in a binary for allocating
   5  * new sections.
   6  */
   7
   8 // RUN: %clang %s -o %t.exe -Wl,-q
   9 // RUN: llvm-bolt %t.exe -o %t.bolt.exe 2>&1 | FileCheck %s
  10 // RUN: %t.bolt.exe
  11
  12 // CHECK: BOLT-INFO: using reserved space
  13
  14 /*
  15  * Check that llvm-bolt detects a condition when the reserved space is
  16  * not enough for allocating new sections.
  17  */
  18
  19 // RUN: %clang %s -o %t.tiny.exe -Wl,--no-eh-frame-hdr -Wl,-q -DTINY
  20 // RUN: not llvm-bolt %t.tiny.exe -o %t.tiny.bolt.exe 2>&1 | \
  21 // RUN:   FileCheck %s --check-prefix=CHECK-TINY
  22
  23 // CHECK-TINY: BOLT-ERROR: reserved space (1 byte) is smaller than required
  24
  25 #ifdef TINY
  26 #define RSIZE "1"
  27 #else
  28 #define RSIZE "8192 * 1024"
  29 #endif
  30
  31 asm(".pushsection .text \n\
  32        .globl __bolt_reserved_start \n\
  33        .type __bolt_reserved_start, @object \n\
  34        __bolt_reserved_start: \n\
  35        .space " RSIZE " \n\
  36        .globl __bolt_reserved_end \n\
  37        __bolt_reserved_end: \n\
  38      .popsection");
  39
  40 int main() { return 0; }