178d26fa18
execve("/proc/self/exe") will not work if the binary relies on
$EXEC_ORIGIN in an rpath. Query AT_EXECFN instead, which will give the
same string that the current binary was exec'd with.
Differential Revision: https://reviews.llvm.org/D54113
llvm-svn: 346215
24 lines
553 B
C++
24 lines
553 B
C++
// MSAN re-execs on unlimited stacks. We use that to verify ReExec() uses the
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// right path.
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// RUN: %clangxx_msan -O0 %s -o %t && ulimit -s unlimited && %run %t | FileCheck %s
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#include <stdio.h>
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#if !defined(__GLIBC_PREREQ)
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#define __GLIBC_PREREQ(a, b) 0
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#endif
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#if __GLIBC_PREREQ(2, 16)
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#include <sys/auxv.h>
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#endif
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int main() {
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#if __GLIBC_PREREQ(2, 16)
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// Make sure AT_EXECFN didn't get overwritten by re-exec.
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puts(reinterpret_cast<const char *>(getauxval(AT_EXECFN)));
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#else
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puts("No getauxval");
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#endif
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// CHECK-NOT: /proc/self/exe
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}
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