projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| f02baefb | 1 | /* |
| c0c0989a | 2 | * SPDX-License-Identifier: MIT |
| f02baefb | 3 | * |
| c0c0989a | 4 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| f02baefb MD |
5 | * |
| 6 | * dlfcn.h compatibility layer. | |
| f02baefb MD |
7 | */ |
| 8 | ||
| c0c0989a MJ |
9 | #ifndef _LTTNG_UST_DLFCN_H |
| 10 | #define _LTTNG_UST_DLFCN_H | |
| 11 | ||
| f02baefb MD |
12 | #ifdef _DLFCN_H |
| 13 | #error "Please include lttng/ust-dlfcn.h before dlfcn.h." | |
| 14 | #endif /* _DLFCN_H */ | |
| 15 | ||
| 30307a67 | 16 | #ifdef __GLIBC__ |
| f02baefb MD |
17 | /* |
| 18 | * glibc declares dlsym() and dlerror() with __attribute__((leaf)) (see | |
| 19 | * THROW annotation). Unfortunately, this is not in sync with reality, | |
| 20 | * as those functions call the memory allocator. Work-around this glibc | |
| 21 | * bug by declaring our own symbols. | |
| 22 | * | |
| 23 | * There has been a similar issue for dlopen() and dlclose(), as | |
| 24 | * constructors and destructors are called from these functions, so they | |
| 25 | * are clearly non-leaf. Work-around the issue for those too for older | |
| 26 | * glibc where these have not been fixed. | |
| 27 | */ | |
| 28 | #define dlopen glibc_dlopen_proto_lies_about_leafness | |
| 29 | #define dlclose glibc_dlclose_proto_lies_about_leafness | |
| 30 | #define dlsym glibc_dlsym_proto_lies_about_leafness | |
| 31 | #define dlerror glibc_dlerror_proto_lies_about_leafness | |
| 7b0fdd83 MD |
32 | #define dlmopen glibc_dlmopen_proto_lies_about_leafness |
| 33 | #define dlvsym glibc_dlvsym_proto_lies_about_leafness | |
| f02baefb | 34 | #include <dlfcn.h> |
| 7b0fdd83 MD |
35 | #undef dlvsym |
| 36 | #undef dlmopen | |
| f02baefb MD |
37 | #undef dlerror |
| 38 | #undef dlsym | |
| 39 | #undef dlclose | |
| 40 | #undef dlopen | |
| 41 | ||
| 42 | extern void *dlopen(__const char *__file, int __mode); | |
| 43 | extern int dlclose(void *__handle) __nonnull ((1)); | |
| 44 | extern void *dlsym(void *__restrict __handle, | |
| 45 | __const char *__restrict __name) __nonnull ((2)); | |
| 39ec1582 | 46 | extern char *dlerror(void); |
| 7b0fdd83 MD |
47 | #ifdef __USE_GNU |
| 48 | extern void *dlmopen(Lmid_t __nsid, const char *__file, int __mode); | |
| 49 | extern void *dlvsym(void *__restrict __handle, | |
| 50 | __const char *__restrict __name, | |
| 51 | __const char *__restrict __version); | |
| 52 | #endif | |
| 30307a67 MJ |
53 | #else |
| 54 | #include <dlfcn.h> | |
| 55 | #endif /* __GLIBC__ */ | |
| f02baefb MD |
56 | |
| 57 | #endif /* _LTTNG_UST_DLFCN_H */ |