diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2019-12-20 19:53:05 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2019-12-20 19:53:05 +0000 |
commit | 0b57cec536236d46e3dba9bd041533462f33dbb7 (patch) | |
tree | 56229dbdbbf76d18580f72f789003db17246c8d9 /contrib/llvm/lib/Support/Unix/DynamicLibrary.inc | |
parent | 718ef55ec7785aae63f98f8ca05dc07ed399c16d (diff) |
Notes
Diffstat (limited to 'contrib/llvm/lib/Support/Unix/DynamicLibrary.inc')
-rw-r--r-- | contrib/llvm/lib/Support/Unix/DynamicLibrary.inc | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/contrib/llvm/lib/Support/Unix/DynamicLibrary.inc b/contrib/llvm/lib/Support/Unix/DynamicLibrary.inc deleted file mode 100644 index a2a379963de0..000000000000 --- a/contrib/llvm/lib/Support/Unix/DynamicLibrary.inc +++ /dev/null @@ -1,134 +0,0 @@ -//===- Unix/DynamicLibrary.cpp - Unix DL Implementation ---------*- 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 provides the UNIX specific implementation of DynamicLibrary. -// -//===----------------------------------------------------------------------===// - -#if defined(HAVE_DLFCN_H) && defined(HAVE_DLOPEN) -#include <dlfcn.h> - -DynamicLibrary::HandleSet::~HandleSet() { - // Close the libraries in reverse order. - for (void *Handle : llvm::reverse(Handles)) - ::dlclose(Handle); - if (Process) - ::dlclose(Process); - - // llvm_shutdown called, Return to default - DynamicLibrary::SearchOrder = DynamicLibrary::SO_Linker; -} - -void *DynamicLibrary::HandleSet::DLOpen(const char *File, std::string *Err) { - void *Handle = ::dlopen(File, RTLD_LAZY|RTLD_GLOBAL); - if (!Handle) { - if (Err) *Err = ::dlerror(); - return &DynamicLibrary::Invalid; - } - -#ifdef __CYGWIN__ - // Cygwin searches symbols only in the main - // with the handle of dlopen(NULL, RTLD_GLOBAL). - if (!File) - Handle = RTLD_DEFAULT; -#endif - - return Handle; -} - -void DynamicLibrary::HandleSet::DLClose(void *Handle) { - ::dlclose(Handle); -} - -void *DynamicLibrary::HandleSet::DLSym(void *Handle, const char *Symbol) { - return ::dlsym(Handle, Symbol); -} - -#else // !HAVE_DLOPEN - -DynamicLibrary::HandleSet::~HandleSet() {} - -void *DynamicLibrary::HandleSet::DLOpen(const char *File, std::string *Err) { - if (Err) *Err = "dlopen() not supported on this platform"; - return &Invalid; -} - -void DynamicLibrary::HandleSet::DLClose(void *Handle) { -} - -void *DynamicLibrary::HandleSet::DLSym(void *Handle, const char *Symbol) { - return nullptr; -} - -#endif - -// Must declare the symbols in the global namespace. -static void *DoSearch(const char* SymbolName) { -#define EXPLICIT_SYMBOL(SYM) \ - extern void *SYM; if (!strcmp(SymbolName, #SYM)) return (void*)&SYM - - // If this is darwin, it has some funky issues, try to solve them here. Some - // important symbols are marked 'private external' which doesn't allow - // SearchForAddressOfSymbol to find them. As such, we special case them here, - // there is only a small handful of them. - -#ifdef __APPLE__ - { - // __eprintf is sometimes used for assert() handling on x86. - // - // FIXME: Currently disabled when using Clang, as we don't always have our - // runtime support libraries available. -#ifndef __clang__ -#ifdef __i386__ - EXPLICIT_SYMBOL(__eprintf); -#endif -#endif - } -#endif - -#ifdef __CYGWIN__ - { - EXPLICIT_SYMBOL(_alloca); - EXPLICIT_SYMBOL(__main); - } -#endif - -#undef EXPLICIT_SYMBOL - -// This macro returns the address of a well-known, explicit symbol -#define EXPLICIT_SYMBOL(SYM) \ - if (!strcmp(SymbolName, #SYM)) return &SYM - -// Under glibc we have a weird situation. The stderr/out/in symbols are both -// macros and global variables because of standards requirements. So, we -// boldly use the EXPLICIT_SYMBOL macro without checking for a #define first. -#if defined(__GLIBC__) - { - EXPLICIT_SYMBOL(stderr); - EXPLICIT_SYMBOL(stdout); - EXPLICIT_SYMBOL(stdin); - } -#else - // For everything else, we want to check to make sure the symbol isn't defined - // as a macro before using EXPLICIT_SYMBOL. - { -#ifndef stdin - EXPLICIT_SYMBOL(stdin); -#endif -#ifndef stdout - EXPLICIT_SYMBOL(stdout); -#endif -#ifndef stderr - EXPLICIT_SYMBOL(stderr); -#endif - } -#endif -#undef EXPLICIT_SYMBOL - - return nullptr; -} |