mirror of
https://github.com/ziglang/zig.git
synced 2024-12-04 19:09:32 +00:00
8219d92987
* rename is_compiler_rt_or_libc to skip_linker_dependencies and set it to `true` for all sub-Compilations. I believe this resolves the deadlock we were experiencing on Drone CI and on some users' computers. I will remove the CI workaround in a follow-up commit. * enabling TSAN automatically causes the Compilation to link against libc++ even if not requested, because TSAN depends on libc++. * add -fno-rtti flags where appropriate when building TSAN objects. Thanks Firefox317 for pointing this out. * TSAN support: resolve all the undefined symbols. We are still seeing a dependency on __gcc_personality_v0 but will resolve this one in a follow-up commit. * static libs do not try to build libc++ or libc++abi.
84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
//===-- interception_linux.cpp ----------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of AddressSanitizer, an address sanity checker.
|
|
//
|
|
// Linux-specific interception methods.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "interception.h"
|
|
|
|
#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
|
|
SANITIZER_OPENBSD || SANITIZER_SOLARIS
|
|
|
|
#include <dlfcn.h> // for dlsym() and dlvsym()
|
|
|
|
namespace __interception {
|
|
|
|
#if SANITIZER_NETBSD
|
|
static int StrCmp(const char *s1, const char *s2) {
|
|
while (true) {
|
|
if (*s1 != *s2)
|
|
return false;
|
|
if (*s1 == 0)
|
|
return true;
|
|
s1++;
|
|
s2++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void *GetFuncAddr(const char *name, uptr wrapper_addr) {
|
|
#if SANITIZER_NETBSD
|
|
// FIXME: Find a better way to handle renames
|
|
if (StrCmp(name, "sigaction"))
|
|
name = "__sigaction14";
|
|
#endif
|
|
void *addr = dlsym(RTLD_NEXT, name);
|
|
if (!addr) {
|
|
// If the lookup using RTLD_NEXT failed, the sanitizer runtime library is
|
|
// later in the library search order than the DSO that we are trying to
|
|
// intercept, which means that we cannot intercept this function. We still
|
|
// want the address of the real definition, though, so look it up using
|
|
// RTLD_DEFAULT.
|
|
addr = dlsym(RTLD_DEFAULT, name);
|
|
|
|
// In case `name' is not loaded, dlsym ends up finding the actual wrapper.
|
|
// We don't want to intercept the wrapper and have it point to itself.
|
|
if ((uptr)addr == wrapper_addr)
|
|
addr = nullptr;
|
|
}
|
|
return addr;
|
|
}
|
|
|
|
bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func,
|
|
uptr wrapper) {
|
|
void *addr = GetFuncAddr(name, wrapper);
|
|
*ptr_to_real = (uptr)addr;
|
|
return addr && (func == wrapper);
|
|
}
|
|
|
|
// Android and Solaris do not have dlvsym
|
|
#if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD
|
|
static void *GetFuncAddr(const char *name, const char *ver) {
|
|
return dlvsym(RTLD_NEXT, name, ver);
|
|
}
|
|
|
|
bool InterceptFunction(const char *name, const char *ver, uptr *ptr_to_real,
|
|
uptr func, uptr wrapper) {
|
|
void *addr = GetFuncAddr(name, ver);
|
|
*ptr_to_real = (uptr)addr;
|
|
return addr && (func == wrapper);
|
|
}
|
|
#endif // !SANITIZER_ANDROID
|
|
|
|
} // namespace __interception
|
|
|
|
#endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
|
|
// SANITIZER_OPENBSD || SANITIZER_SOLARIS
|