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unwind: always export unw_local_addr_space

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It seems that the remote unwinder is entirely unused at this moment.
unw_local_addr_space was referencing sThisAddressSpace which use to be a static
in global namespace.  It has since then become a member variable of
LocalAddressSpace.  Update this definition and always export it (needed to
implement unw_get_proc_info_by_ip for ARM).

llvm-svn: 229133
This commit is contained in:
Saleem Abdulrasool 2015-02-13 19:04:48 +00:00
parent b4a110f051
commit 9dd5ca1fe8
2 changed files with 6 additions and 6 deletions
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3
libcxxabi/include/libunwind.h
View File

@ -107,12 +107,13 @@ extern int unw_is_signal_frame(unw_cursor_t *) LIBUNWIND_AVAIL;
extern int unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *) LIBUNWIND_AVAIL;
//extern int unw_get_save_loc(unw_cursor_t*, int, unw_save_loc_t*);
extern unw_addr_space_t unw_local_addr_space;
#ifdef UNW_REMOTE
/*
* Mac OS X "remote" API for unwinding other processes on same machine
*
*/
extern unw_addr_space_t unw_local_addr_space;
extern unw_addr_space_t unw_create_addr_space_for_task(task_t);
extern void unw_destroy_addr_space(unw_addr_space_t);
extern int unw_init_remote_thread(unw_cursor_t *, unw_addr_space_t, thread_t *);

9
libcxxabi/src/Unwind/libunwind.cpp
View File

@ -35,6 +35,9 @@ using namespace libunwind;
/// internal object to represent this processes address space
LocalAddressSpace LocalAddressSpace::sThisAddressSpace;
_LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space =
(unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace;
/// record the registers and stack position of the caller
extern int unw_getcontext(unw_context_t *);
// note: unw_getcontext() implemented in assembly
@ -70,16 +73,12 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor,
}
#ifdef UNW_REMOTE
_LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space =
(unw_addr_space_t) & sThisAddressSpace;
/// Create a cursor into a thread in another process.
_LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor,
unw_addr_space_t as,
void *arg) {
// special case: unw_init_remote(xx, unw_local_addr_space, xx)
if (as == (unw_addr_space_t) & sThisAddressSpace)
if (as == (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace)
return unw_init_local(cursor, NULL); //FIXME
// use "placement new" to allocate UnwindCursor in the cursor buffer