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Document which routines are signal-safe.
(unw_addr_space_t): New type. (unw_accessors_t): Remove "arg" member. (unw_local_addr_space): New variable. (unw_create_addr_space): New function. (unw_destroy_addr_space): Ditto. (unw_init_remote): Take address-space and accessor-argument pointer instead of accessor structure as argument. (unw_set_caching_policy): Take address-space as first argument. (unw_flush_cache): Take address space and address-range (lo & hi) arguments. (Logical change 1.27)
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mostang.com!davidm
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commit
87bc2e3242
1 changed files with 57 additions and 24 deletions
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@ -118,6 +118,8 @@ typedef union
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}
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unw_fpreg_t;
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typedef struct unw_addr_space *unw_addr_space_t;
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/* These are backend callback routines that provide access to the
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state of a "remote" process. This can be used, for example, to
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unwind another process through the ptrace() interface. */
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@ -140,8 +142,6 @@ typedef struct unw_accessors
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void *arg);
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int (*resume) (unw_cursor_t *c, void *arg);
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void *arg; /* application-specific data */
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}
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unw_accessors_t;
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@ -168,8 +168,13 @@ unw_save_loc_t;
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/* These routines work both for local and remote unwinding. */
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extern unw_addr_space_t UNW_OBJ(local_addr_space);
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extern unw_addr_space_t UNW_OBJ(create_addr_space) (unw_accessors_t *a);
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extern void UNW_OBJ(destroy_addr_space) (unw_addr_space_t as);
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extern int UNW_OBJ(init_local) (unw_cursor_t *c, ucontext_t *u);
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extern int UNW_OBJ(init_remote) (unw_cursor_t *c, unw_accessors_t *a);
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extern int UNW_OBJ(init_remote) (unw_cursor_t *c, unw_addr_space_t as,
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void *as_arg);
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extern int UNW_OBJ(step) (unw_cursor_t *c);
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extern int UNW_OBJ(resume) (unw_cursor_t *c);
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extern int UNW_OBJ(get_reg) (unw_cursor_t *c, int regnum, unw_word_t *valp);
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@ -181,59 +186,87 @@ extern int UNW_OBJ(get_save_loc) (unw_cursor_t *c, int regnum,
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extern int UNW_OBJ(is_signal_frame) (unw_cursor_t *c);
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extern const char *UNW_OBJ(regname) (int regnum);
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#define unw_local_addr_space UNW_OBJ(local_addr_space)
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/* Create a new address space (in addition to the default
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local_addr_space).
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This routine is NOT signal-safe. */
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#define unw_create_addr_space(a) UNW_OBJ(create_addr_space)(a)
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/* Destroy an address space.
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This routine is NOT signal-safe. */
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#define unw_destroy_addr_space(as) UNW_OBJ(destroy_addr_space)(as)
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/* Initialize cursor C such that unwinding starts at the point
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represented by the context U. Returns zero on success, negative
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value on failure. */
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value on failure.
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This routine is signal-safe. */
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#define unw_init_local(c,u) UNW_OBJ(init_local)(c, u)
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/* Initialize cursor C such that it accesses the unwind target through
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accessors A. */
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#define unw_init_remote(c,a) UNW_OBJ(init_remote)(c, a)
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accessors A.
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This routine is signal-safe. */
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#define unw_init_remote(c,a,arg) UNW_OBJ(init_remote)(c, a, arg)
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/* Move cursor up by one step (up meaning toward earlier, less deeply
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nested frames). Returns positive number if there are more frames
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to unwind, 0 if last frame has been reached, negative number in
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case of an error. */
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case of an error.
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This routine is signal-safe. */
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#define unw_step(c) UNW_OBJ(step)(c)
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/* Resume execution at the point identified by the cursor. */
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/* Resume execution at the point identified by the cursor.
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This routine is signal-safe. */
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#define unw_resume(c) UNW_OBJ(resume)(c)
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/* Register accessor routines. Return zero on success, negative value
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on failure. */
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on failure.
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These routines are signal-safe. */
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#define unw_get_reg(c,r,v) UNW_OBJ(get_reg)(c,r,v)
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#define unw_set_reg(c,r,v) UNW_OBJ(set_reg)(c,r,v)
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/* Floating-point accessor routines. Return zero on success, negative
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value on failure. */
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value on failure.
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These routines are signal-safe. */
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#define unw_get_fpreg(c,r,v) UNW_OBJ(get_fpreg)(c,r,v)
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#define unw_set_fpreg(c,r,v) UNW_OBJ(set_fpreg)(c,r,v)
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/* Get the save-location of register R.
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This routine is signal-safe. */
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#define unw_get_save_loc(c,r,l) UNW_OBJ(get_save_loc)(c,r,l)
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/* Return 1 if register number R is a floating-point register, zero
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otherwise. */
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otherwise.
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This routine is signal-safe. */
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#define unw_is_fpreg(r) unw_tdep_is_fpreg(r)
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/* Returns non-zero value if the cursor points to a signal frame. */
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/* Returns non-zero value if the cursor points to a signal frame.
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This routine is signal-safe. */
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#define unw_is_signal_frame(c) UNW_OBJ(is_signal_frame)(c)
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/* Returns the canonical register name of register R. R must be in
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the range from 0 to UNW_REG_LAST. Like all other unwind routines,
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this one is re-entrant (i.e., the returned string must be a string
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constant. */
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constant.
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This routine is signal-safe. */
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#define unw_regname(r) UNW_OBJ(regname)(r)
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/* Sets the caching policy. Caching can be disabled completely by
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setting the policy to UNW_CACHE_NONE. With UNW_CACHE_GLOBAL, there
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is a single cache that is shared across all threads. With
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UNW_CACHE_PER_THREAD, each thread gets its own cache, which can
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improve performance thanks to less locking and better locality. By
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default, UNW_CACHE_GLOBAL is in effect. */
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#define unw_set_caching_policy(p) UNW_OBJ(set_caching_policy)(p)
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/* Sets the caching policy of address space AS. Caching can be
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disabled completely by setting the policy to UNW_CACHE_NONE. With
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UNW_CACHE_GLOBAL, there is a single cache that is shared across all
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threads. With UNW_CACHE_PER_THREAD, each thread gets its own
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cache, which can improve performance thanks to less locking and
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better locality. By default, UNW_CACHE_GLOBAL is in effect.
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This routine is NOT signal-safe. */
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#define unw_set_caching_policy(as, p) UNW_OBJ(set_caching_policy)(as, p)
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/* Flush all caches (global, per-thread, or any other caches that
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might exist). This function must be called if any of unwind
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information might have changed (e.g., because a library might have
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been removed via a call to dlclose()). */
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#define unw_flush_cache() UNW_OBJ(flush_cache)()
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might exist) in address-space AS of information at least relating
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to the address-range LO to HI (non-inclusive). LO and HI are only
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a performance hint and the function is allowed to over-flush (i.e.,
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flush more than the requested address-range). Furthermore, if LO
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and HI are both 0, the entire address-range is flushed. This
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function must be called if any of unwind information might have
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changed (e.g., because a library might have been removed via a call
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to dlclose()). This routine is signal-safe. */
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#define unw_flush_cache(as,lo,hi) UNW_OBJ(flush_cache)(as, lo, hi)
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