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half finished unw_local_init2

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This commit is contained in:
Dave Watson 2017-08-16 11:27:43 -07:00
parent 4e8b7a595e
commit 644cce3d72
3 changed files with 23 additions and 6 deletions
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10
include/libunwind-common.h.in
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@ -86,6 +86,12 @@ typedef enum
}
unw_caching_policy_t;
typedef enum
{
UNW_INIT_SIGNAL_FRAME = 1, /* We know this is a signal frame */
}
unw_init_local2_flags_t;
typedef int unw_regnum_t;
/* The unwind cursor starts at the youngest (most deeply nested) frame
@ -219,7 +225,7 @@ unw_save_loc_t;
#define unw_destroy_addr_space UNW_OBJ(destroy_addr_space)
#define unw_get_accessors UNW_ARCH_OBJ(get_accessors)
#define unw_init_local UNW_OBJ(init_local)
#define unw_init_local_signal UNW_OBJ(init_local_signal)
#define unw_init_local2 UNW_OBJ(init_local2)
#define unw_init_remote UNW_OBJ(init_remote)
#define unw_step UNW_OBJ(step)
#define unw_resume UNW_OBJ(resume)
@ -250,7 +256,7 @@ extern int unw_set_cache_size (unw_addr_space_t, size_t, int);
extern const char *unw_regname (unw_regnum_t);
extern int unw_init_local (unw_cursor_t *, unw_context_t *);
extern int unw_init_local_signal (unw_cursor_t *, unw_context_t *);
extern int unw_init_local2 (unw_cursor_t *, unw_context_t *, int);
extern int unw_init_remote (unw_cursor_t *, unw_addr_space_t, void *);
extern int unw_step (unw_cursor_t *);
extern int unw_resume (unw_cursor_t *);

15
src/x86_64/Ginit_local.c
View file

@ -62,9 +62,20 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
}
PROTECTED int
unw_init_local_signal (unw_cursor_t *cursor, ucontext_t *uc)
unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
{
return unw_init_local_common(cursor, uc, 0);
if (!flag)
{
return unw_init_local_common(cursor, uc, 1);
}
else if (flag == UNW_INIT_SIGNAL_FRAME)
{
return unw_init_local_common(cursor, uc, 0);
}
else
{
return -UNW_EINVAL;
}
}
#endif /* !UNW_REMOTE_ONLY */

4
tests/Ltest-init-local-signal.c
View file

@ -25,12 +25,12 @@ int stepper(unw_cursor_t* c) {
/* Verify that we can step from both ucontext, and from getcontext()
* roughly the same. This tests that the IP from ucontext is used
* correctly (see impl of unw_init_local_signal) */
* correctly (see impl of unw_init_local2) */
void handler(int num, siginfo_t* info, void* ucontext) {
unw_cursor_t c;
unw_context_t context;
unw_getcontext(&context);
int ret = unw_init_local_signal(&c, ucontext);
int ret = unw_init_local2(&c, ucontext, UNW_INIT_SIGNAL_FRAME);
assert(!ret);
int ucontext_steps = stepper(&c);