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[ASan] hack initialization-bug test so that it stably passes on both Linux and Mac: make the bug appear independent of the translation unit order 

llvm-svn: 163381
This commit is contained in:
Alexey Samsonov 2012-09-07 09:24:29 +00:00
parent 1cf578d599
commit f42e860c51
2 changed files with 27 additions and 8 deletions
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6
compiler-rt/lib/asan/lit_tests/Helpers/initialization-bug-extra2.cc Normal file
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@ -0,0 +1,6 @@
// 'z' is dynamically initialized global from different TU.
extern int z;
int __attribute__((noinline)) initY() {
return z + 1;
}
int y = initY();

29
compiler-rt/lib/asan/lit_tests/initialization-bug.cc
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@ -1,33 +1,46 @@
// Test to make sure basic initialization order errors are caught.
// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-bug-extra.cc\
// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-bug-extra2.cc\
// RUN: -mllvm -asan-initialization-order -o %t && %t 2>&1 \
// RUN: | %symbolize | FileCheck %s
// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-bug-extra.cc\
// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-bug-extra2.cc\
// RUN: -mllvm -asan-initialization-order -o %t && %t 2>&1 \
// RUN: | %symbolize | FileCheck %s
// Do not test with optimization -- the error may be optimized away.
extern int y;
#include <cstdio>
// The structure of the test is:
// "x", "y", "z" are dynamically initialized globals.
// Value of "x" depends on "y", value of "y" depends on "z".
// "x" and "z" are defined in this TU, "y" is defined in another one.
// Thus we shoud stably report initialization order fiasco independently of
// the translation unit order.
int initZ() {
return 5;
}
int z = initZ();
// 'y' is a dynamically initialized global residing in a different TU. This
// dynamic initializer will read the value of 'y' before main starts. The
// result is undefined behavior, which should be caught by initialization order
// checking.
extern int y;
int __attribute__((noinline)) initX() {
return y + 1;
// CHECK: {{AddressSanitizer initialization-order-fiasco}}
// CHECK: {{READ of size .* at 0x.* thread T0}}
// CHECK: {{#0 0x.* in .*initX.* .*initialization-bug.cc:19}}
// CHECK: {{0x.* is located 0 bytes inside of global variable .*y.*}}
// CHECK: {{0x.* is located 0 bytes inside of global variable .*(y|z).*}}
}
// This initializer begins our initialization order problems.
static int x = initX();
// ASan should have caused an exit before main runs.
int main() {
return -1;
// ASan should have caused an exit before main runs.
printf("PASS\n");
// CHECK-NOT: PASS
return 0;
}