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| author | Kostya Serebryany <kcc@google.com> | 2012-08-21 08:24:25 +0000 |
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| committer | Kostya Serebryany <kcc@google.com> | 2012-08-21 08:24:25 +0000 |
| commit | 9b9f87a87ac1b373c4c6a70904315bebbd01c50c (patch) | |
| tree | 1e0784d2c3494557d77fe63c6d0b99f6e8d156d0 /test/Instrumentation/AddressSanitizer | |
| parent | a182367e597516aa5d993a07ee2d0964b3a622e8 (diff) | |
| download | llvm-9b9f87a87ac1b373c4c6a70904315bebbd01c50c.tar.gz llvm-9b9f87a87ac1b373c4c6a70904315bebbd01c50c.tar.bz2 llvm-9b9f87a87ac1b373c4c6a70904315bebbd01c50c.tar.xz | |
[asan] add code to detect global initialization fiasco in C/C++. The sub-pass is off by default for now. Patch by Reid Watson. Note: this patch changes the interface between LLVM and compiler-rt parts of asan. The corresponding patch to compiler-rt will follow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162268 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Instrumentation/AddressSanitizer')
| -rw-r--r-- | test/Instrumentation/AddressSanitizer/instrument_initializer_metadata.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/Instrumentation/AddressSanitizer/instrument_initializer_metadata.ll b/test/Instrumentation/AddressSanitizer/instrument_initializer_metadata.ll new file mode 100644 index 0000000000..472551654e --- /dev/null +++ b/test/Instrumentation/AddressSanitizer/instrument_initializer_metadata.ll @@ -0,0 +1,36 @@ +; RUN: opt < %s -asan -asan-initialization-order -S | FileCheck %s +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-unknown-linux-gnu" +@xxx = global i32 0, align 4 +; Clang will emit the following metadata identifying @xxx as dynamically +; initialized. +!0 = metadata !{i32* @xxx} +!llvm.asan.dynamically_initialized_globals = !{!0} + +define i32 @initializer() uwtable { +entry: + ret i32 42 +} + +define internal void @__cxx_global_var_init() section ".text.startup" { +entry: + %call = call i32 @initializer() + store i32 %call, i32* @xxx, align 4 + ret void +} + +define internal void @_GLOBAL__I_a() address_safety section ".text.startup" { +entry: + call void @__cxx_global_var_init() + ret void +} + +; Clang indicated that @xxx was dynamically initailized. +; __asan_{before,after}_dynamic_init should be called from _GLOBAL__I_a + +; CHECK: define internal void @_GLOBAL__I_a +; CHECK-NOT: ret +; CHECK: call void @__asan_before_dynamic_init +; CHECK: call void @__cxx_global_var_init +; CHECK: call void @__asan_after_dynamic_init +; CHECK: ret |