1 /*===---- unwind.h - Stack unwinding ----------------------------------------===
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 *===-----------------------------------------------------------------------===
24 /* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
26 #ifndef __CLANG_UNWIND_H
27 #define __CLANG_UNWIND_H
29 #if __has_include_next(<unwind.h>)
30 /* Darwin and libunwind provide an unwind.h. If that's available, use
31 * it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE,
32 * so define that around the include.*/
34 # define _SHOULD_UNDEFINE_GNU_SOURCE
37 // libunwind's unwind.h reflects the current visibility. However, Mozilla
38 // builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the
39 // visibility to default and export its contents. gcc also allows users to
40 // override its override by #defining HIDE_EXPORTS (but note, this only obeys
41 // the user's -fvisibility setting; it doesn't hide any exports on its own). We
42 // imitate gcc's header here:
44 # include_next <unwind.h>
46 # pragma GCC visibility push(default)
47 # include_next <unwind.h>
48 # pragma GCC visibility pop
50 # ifdef _SHOULD_UNDEFINE_GNU_SOURCE
52 # undef _SHOULD_UNDEFINE_GNU_SOURCE
62 /* It is a bit strange for a header to play with the visibility of the
63 symbols it declares, but this matches gcc's behavior and some programs
66 #pragma GCC visibility push(default)
69 struct _Unwind_Context;
72 _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
74 _URC_FATAL_PHASE2_ERROR = 2,
75 _URC_FATAL_PHASE1_ERROR = 3,
78 _URC_END_OF_STACK = 5,
79 _URC_HANDLER_FOUND = 6,
80 _URC_INSTALL_CONTEXT = 7,
81 _URC_CONTINUE_UNWIND = 8
82 } _Unwind_Reason_Code;
88 _UVRSC_CORE = 0, /* integer register */
89 _UVRSC_VFP = 1, /* vfp */
90 _UVRSC_WMMXD = 3, /* Intel WMMX data register */
91 _UVRSC_WMMXC = 4 /* Intel WMMX control register */
92 } _Unwind_VRS_RegClass;
100 } _Unwind_VRS_DataRepresentation;
104 _UVRSR_NOT_IMPLEMENTED = 1,
106 } _Unwind_VRS_Result;
108 _Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *__context,
109 _Unwind_VRS_RegClass __regclass,
111 _Unwind_VRS_DataRepresentation __representation,
116 uintptr_t _Unwind_GetIP(struct _Unwind_Context* __context);
120 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context*, void*);
121 _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void*);
124 #pragma GCC visibility pop
133 #endif /* __CLANG_UNWIND_H */