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 #if __has_include_next(<unwind.h>)
27 /* Darwin and libunwind provide an unwind.h. If that's available, use
28 * it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE,
29 * so define that around the include.*/
31 # define _SHOULD_UNDEFINE_GNU_SOURCE
34 // libunwind's unwind.h reflects the current visibility. However, Mozilla
35 // builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the
36 // visibility to default and export its contents. gcc also allows users to
37 // override its override by #defining HIDE_EXPORTS (but note, this only obeys
38 // the user's -fvisibility setting; it doesn't hide any exports on its own). We
39 // imitate gcc's header here:
41 # include_next <unwind.h>
43 # pragma GCC visibility push(default)
44 # include_next <unwind.h>
45 # pragma GCC visibility pop
47 # ifdef _SHOULD_UNDEFINE_GNU_SOURCE
49 # undef _SHOULD_UNDEFINE_GNU_SOURCE
59 /* It is a bit strange for a header to play with the visibility of the
60 symbols it declares, but this matches gcc's behavior and some programs
62 #pragma GCC visibility push(default)
64 struct _Unwind_Context;
67 _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
69 _URC_FATAL_PHASE2_ERROR = 2,
70 _URC_FATAL_PHASE1_ERROR = 3,
73 _URC_END_OF_STACK = 5,
74 _URC_HANDLER_FOUND = 6,
75 _URC_INSTALL_CONTEXT = 7,
76 _URC_CONTINUE_UNWIND = 8
77 } _Unwind_Reason_Code;
83 _UVRSC_CORE = 0, /* integer register */
84 _UVRSC_VFP = 1, /* vfp */
85 _UVRSC_WMMXD = 3, /* Intel WMMX data register */
86 _UVRSC_WMMXC = 4 /* Intel WMMX control register */
87 } _Unwind_VRS_RegClass;
95 } _Unwind_VRS_DataRepresentation;
99 _UVRSR_NOT_IMPLEMENTED = 1,
101 } _Unwind_VRS_Result;
103 _Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *context,
104 _Unwind_VRS_RegClass regclass,
106 _Unwind_VRS_DataRepresentation representation,
111 uintptr_t _Unwind_GetIP(struct _Unwind_Context* context);
115 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context*, void*);
116 _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void*);
118 #pragma GCC visibility pop