bolt/test/X86/instrumentation-eh_frame_hdr.cpp

   1 // This test checks that .eh_frame_hdr address is in bounds of the last LOAD
   2 // end address i.e. the section address is smaller then the LOAD end address.
   3
   4 // REQUIRES: system-linux,bolt-runtime,target=x86_64{{.*}}
   5
   6 // RUN: %clangxx %cxxflags -static -Wl,-q %s -o %t.exe -Wl,--entry=_start
   7 // RUN: llvm-bolt %t.exe -o %t.instr -instrument \
   8 // RUN:   --instrumentation-file=%t.fdata -instrumentation-sleep-time=1
   9 // RUN: llvm-readelf -SW %t.instr | grep -v bolt > %t.sections
  10 // RUN: llvm-readelf -lW %t.instr | grep LOAD | tail -n 1 >> %t.sections
  11 // RUN: FileCheck %s < %t.sections
  12
  13 // CHECK: {{.*}} .eh_frame_hdr PROGBITS [[#%x, EH_ADDR:]]
  14 // CHECK: LOAD 0x[[#%x, LD_OFFSET:]] 0x[[#%x, LD_VADDR:]] 0x[[#%x, LD_FSIZE:]]
  15 // CHECK-SAME: 0x[[#%x, LD_MEMSIZE:]]
  16 //
  17 // If .eh_frame_hdr address bigger then last LOAD segment end address test would
  18 // fail with overflow error, otherwise the result of the expression is 0 that
  19 // could be found on this line e.g. in LOAD align field.
  20 // CHECK-SAME: [[#LD_VADDR + LD_MEMSIZE - max(LD_VADDR + LD_MEMSIZE,EH_ADDR)]]
  21
  22 #include <cstdio>
  23 #include <stdexcept>
  24
  25 void foo() { throw std::runtime_error("Exception from foo()"); }
  26
  27 void bar() { foo(); }
  28
  29 int main() {
  30   try {
  31     bar();
  32   } catch (const std::exception &e) {
  33     printf("Exception caught: %s\n", e.what());
  34   }
  35 }
  36
  37 extern "C" {
  38 void _start();
  39 }
  40
  41 void _start() { main(); }