diff options
| author | Mehdi Amini <mehdi.amini@apple.com> | 2016-11-18 17:28:10 +0000 |
|---|---|---|
| committer | Mehdi Amini <mehdi.amini@apple.com> | 2016-11-18 17:28:10 +0000 |
| commit | ed72617844d995db27f4d0b1a08f5bfd39f9976a (patch) | |
| tree | bf40b3964c1851543808c41654d460ef27110b3d /include | |
| parent | 37f2389c9d8af21e294c59f2ab51149a44fe2cc9 (diff) | |
| download | llvm-ed72617844d995db27f4d0b1a08f5bfd39f9976a.tar.gz | |
Add link-time detection of LLVM_ABI_BREAKING_CHECKS mismatch
Summary:
LLVM will define a symbol, either EnableABIBreakingChecks or
DisableABIBreakingChecks depending on the configuration setting for
LLVM_ABI_BREAKING_CHECKS.
The llvm-config.h header will add weak references to these symbols in
every clients that includes this header. This should ensure that
a mismatch triggers a link failure (or a load time failure for DSO).
On MSVC, the pragma "detect_mismatch" is used instead.
Reviewers: rnk, jroelofs
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D26841
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287352 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Config/llvm-config.h.cmake | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/llvm/Config/llvm-config.h.cmake b/include/llvm/Config/llvm-config.h.cmake index 4121e865ea00..fad1bd10d9e4 100644 --- a/include/llvm/Config/llvm-config.h.cmake +++ b/include/llvm/Config/llvm-config.h.cmake @@ -80,4 +80,25 @@ /* LLVM version string */ #define LLVM_VERSION_STRING "${PACKAGE_VERSION}" +// ABI_BREAKING_CHECKS protection: provides link-time failure when clients build +// mismatch with LLVM +#if defined(_MSC_VER) +// Use pragma with MSVC +#define LLVM_XSTR(s) LLVM_STR(s) +#define LLVM_STR(s) #s +#pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS)) +#undef LLVM_XSTR +#undef LLVM_STR +#elif defined(__cplusplus) +namespace llvm { +#if LLVM_ENABLE_ABI_BREAKING_CHECKS +extern int EnableABIBreakingChecks; +__attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks; +#else +extern int DisableABIBreakingChecks; +__attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks; +#endif +} +#endif // _MSC_VER + #endif |