* uw-thread.c: Apply GNU conventions to comment formatting.
(deactivate_uw_thread): Call remove_thread_event_breakpoints(). (uw_thread_mourn_inferior): Move remove_thread_event_breakpoints() call to deactivate_uw_thread().
This commit is contained in:
Nicholas Duffek
parent
8ba8a4628f
commit
6c7e601e3e
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@ -1,3 +1,10 @@
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2000-03-02 Nick Duffek <nsd@cygnus.com>
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* uw-thread.c: Apply GNU conventions to comment formatting.
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(deactivate_uw_thread): Call remove_thread_event_breakpoints().
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(uw_thread_mourn_inferior): Move remove_thread_event_breakpoints()
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call to deactivate_uw_thread().
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Thu Mar 2 09:04:46 2000 Andrew Cagney <cagney@b1.cygnus.com>
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* MAINTAINERS: Daniel Berlin is C++ maintainer.
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367
gdb/uw-thread.c
367
gdb/uw-thread.c
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@ -103,10 +103,9 @@
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#include "inferior.h"
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#include <fcntl.h>
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/*
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* <thread.h> includes <sys/priocntl.h>, which requires boolean_t from
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* <sys/types.h>, which doesn't typedef boolean_t with gcc.
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*/
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/* <thread.h> includes <sys/priocntl.h>, which requires boolean_t from
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<sys/types.h>, which doesn't typedef boolean_t with gcc. */
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#define boolean_t int
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#include <thread.h>
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#undef boolean_t
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@ -114,19 +113,16 @@
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#include <synch.h> /* for UnixWare 2.x */
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/*
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* Whether to emit debugging output.
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*/
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/* Whether to emit debugging output. */
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#define DEBUG 0
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/*
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* Default debugging output file, overridden by envvar UWTHR_DEBUG.
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*/
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/* Default debugging output file, overridden by envvar UWTHR_DEBUG. */
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#define DEBUG_FILE "/dev/tty"
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/*
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* #if DEBUG, write string S to the debugging output channel.
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*/
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/* #if DEBUG, write string S to the debugging output channel. */
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#if !DEBUG
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# define DBG(fmt_and_args)
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# define DBG2(fmt_and_args)
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@ -135,10 +131,9 @@
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# define DBG2(fmt_and_args)
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#endif
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/*
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* Back end to CALL_BASE() and TRY_BASE(): evaluate CALL, then convert
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* inferior_pid to a composite thread/process id.
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*/
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/* Back end to CALL_BASE() and TRY_BASE(): evaluate CALL, then convert
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inferior_pid to a composite thread/process id. */
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#define CALL_BASE_1(call) \
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do { \
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DBG2(("CALL_BASE(" #call ")")); \
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@ -146,13 +141,12 @@ do { \
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do_cleanups (infpid_cleanup); \
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} while (0)
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/*
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* If inferior_pid can be converted to a composite lwp/process id, do so,
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* evaluate base_ops function CALL, and then convert inferior_pid back to a
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* composite thread/process id.
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*
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* Otherwise, issue an error message and return nonlocally.
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*/
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/* If inferior_pid can be converted to a composite lwp/process id, do so,
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evaluate base_ops function CALL, and then convert inferior_pid back to a
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composite thread/process id.
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Otherwise, issue an error message and return nonlocally. */
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#define CALL_BASE(call) \
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do { \
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if (!lwp_infpid ()) \
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@ -160,28 +154,25 @@ do { \
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CALL_BASE_1 (call); \
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} while (0)
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/*
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* Like CALL_BASE(), but instead of returning nonlocally on error, set
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* *CALLED to whether the inferior_pid conversion was successful.
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*/
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/* Like CALL_BASE(), but instead of returning nonlocally on error, set
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*CALLED to whether the inferior_pid conversion was successful. */
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#define TRY_BASE(call, called) \
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do { \
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if ((*(called) = lwp_infpid ())) \
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CALL_BASE_1 (call); \
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} while (0)
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/*
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* Information passed by thread_iter() to its callback parameter.
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*/
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/* Information passed by thread_iter() to its callback parameter. */
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typedef struct {
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struct thread_map map;
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__lwp_desc_t lwp;
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CORE_ADDR mapp;
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} iter_t;
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/*
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* Private thread data for the thread_info struct.
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*/
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/* Private thread data for the thread_info struct. */
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struct private_thread_info {
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int stable; /* 0 if libthread.so is modifying thread map */
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int thrid; /* thread id assigned by libthread.so */
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@ -231,10 +222,9 @@ static struct cleanup *infpid_cleanup;
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#if DEBUG
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/*
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* Helper function for DBG() macro: if printf-style FMT is non-null, format it
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* with args and display the result on the debugging output channel.
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*/
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/* Helper function for DBG() macro: if printf-style FMT is non-null, format it
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with args and display the result on the debugging output channel. */
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static void
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dbg (char *fmt, ...)
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{
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@ -265,9 +255,8 @@ dbg (char *fmt, ...)
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}
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#if 0
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/*
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* Return a string representing composite PID's components.
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*/
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/* Return a string representing composite PID's components. */
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static char *
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dbgpid (int pid)
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{
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@ -286,9 +275,8 @@ dbgpid (int pid)
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return buf;
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}
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/*
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* Return a string representing thread state CHANGE.
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*/
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/* Return a string representing thread state CHANGE. */
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static char *
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dbgchange (enum thread_change change)
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{
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@ -306,9 +294,8 @@ dbgchange (enum thread_change change)
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}
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}
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/*
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* Return a string representing thread STATE.
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*/
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/* Return a string representing thread STATE. */
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static char *
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dbgstate (int state)
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{
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@ -328,9 +315,8 @@ dbgstate (int state)
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#endif /* DEBUG */
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/*
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* Read the contents of _thr_debug into *DEBUGP. Return success.
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*/
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/* Read the contents of _thr_debug into *DEBUGP. Return success. */
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static int
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read_thr_debug (struct thread_debug *debugp)
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{
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@ -338,10 +324,9 @@ read_thr_debug (struct thread_debug *debugp)
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sizeof (*debugp), 0, &base_ops);
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}
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/*
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* Read into MAP the contents of the thread map at inferior process address
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* MAPP. Return success.
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*/
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/* Read into MAP the contents of the thread map at inferior process address
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MAPP. Return success. */
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static int
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read_map (CORE_ADDR mapp, struct thread_map *map)
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{
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@ -349,10 +334,9 @@ read_map (CORE_ADDR mapp, struct thread_map *map)
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sizeof (*map), 0, &base_ops);
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}
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/*
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* Read into LWP the contents of the lwp decriptor at inferior process address
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* LWPP. Return success.
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*/
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/* Read into LWP the contents of the lwp decriptor at inferior process address
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LWPP. Return success. */
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static int
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read_lwp (CORE_ADDR lwpp, __lwp_desc_t *lwp)
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{
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@ -360,16 +344,15 @@ read_lwp (CORE_ADDR lwpp, __lwp_desc_t *lwp)
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sizeof (*lwp), 0, &base_ops);
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}
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/*
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* Iterate through all user threads, applying FUNC(<map>, <lwp>, DATA) until
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* (a) FUNC returns nonzero,
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* (b) FUNC has been applied to all threads, or
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* (c) an error occurs,
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* where <map> is the thread's struct thread_map and <lwp> if non-null is the
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* thread's current __lwp_desc_t.
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*
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* If a call to FUNC returns nonzero, return that value; otherwise, return 0.
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*/
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/* Iterate through all user threads, applying FUNC(<map>, <lwp>, DATA) until
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(a) FUNC returns nonzero,
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(b) FUNC has been applied to all threads, or
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(c) an error occurs,
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where <map> is the thread's struct thread_map and <lwp> if non-null is the
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thread's current __lwp_desc_t.
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If a call to FUNC returns nonzero, return that value; otherwise, return 0. */
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static int
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thread_iter (int (*func)(iter_t *, void *), void *data)
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{
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@ -405,20 +388,19 @@ thread_iter (int (*func)(iter_t *, void *), void *data)
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}
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}
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/*
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* Deactivate user-mode thread support.
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*/
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/* Deactivate user-mode thread support. */
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static void
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deactivate_uw_thread (void)
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{
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remove_thread_event_breakpoints ();
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uw_thread_active = 0;
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unpush_target (&uw_thread_ops);
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}
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/*
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* Return the composite lwp/process id corresponding to composite
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* id PID. If PID is a thread with no lwp, return 0.
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*/
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/* Return the composite lwp/process id corresponding to composite
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id PID. If PID is a thread with no lwp, return 0. */
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static int
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thr_to_lwp (int pid)
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{
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@ -438,10 +420,9 @@ thr_to_lwp (int pid)
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return lid;
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}
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/*
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* find_thread_lwp() callback: return whether TP describes a thread
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* associated with lwp id DATA.
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*/
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/* find_thread_lwp() callback: return whether TP describes a thread
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associated with lwp id DATA. */
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static int
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find_thread_lwp_callback (struct thread_info *tp, void *data)
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{
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@ -458,20 +439,18 @@ find_thread_lwp_callback (struct thread_info *tp, void *data)
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return 1;
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}
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/*
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* If a thread is associated with lwp id LWPID, return the corresponding
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* member of the global thread list; otherwise, return null.
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*/
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/* If a thread is associated with lwp id LWPID, return the corresponding
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member of the global thread list; otherwise, return null. */
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static struct thread_info *
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find_thread_lwp (int lwpid)
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{
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return iterate_over_threads (find_thread_lwp_callback, (void *)lwpid);
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}
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/*
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* Return the composite thread/process id corresponding to composite
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* id PID. If PID is an lwp with no thread, return PID.
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*/
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/* Return the composite thread/process id corresponding to composite
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id PID. If PID is an lwp with no thread, return PID. */
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static int
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lwp_to_thr (int pid)
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{
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@ -491,10 +470,9 @@ lwp_to_thr (int pid)
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return tid;
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}
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/*
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* do_cleanups() callback: convert inferior_pid to a composite
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* thread/process id after having made a procfs call.
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*/
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/* do_cleanups() callback: convert inferior_pid to a composite
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thread/process id after having made a procfs call. */
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static void
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thr_infpid (void *unused)
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{
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|
@ -504,10 +482,9 @@ thr_infpid (void *unused)
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inferior_pid = pid;
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}
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||||
/*
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* If possible, convert inferior_pid to a composite lwp/process id in
|
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* preparation for making a procfs call. Return success.
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||||
*/
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||||
/* If possible, convert inferior_pid to a composite lwp/process id in
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||||
preparation for making a procfs call. Return success. */
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||||
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||||
static int
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||||
lwp_infpid (void)
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||||
{
|
||||
|
|
@ -523,10 +500,9 @@ lwp_infpid (void)
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|||
return 1;
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||||
}
|
||||
|
||||
/*
|
||||
* Add to the global thread list a new user-mode thread with system id THRID,
|
||||
* lwp id LWPID, map address MAPP, and composite thread/process PID.
|
||||
*/
|
||||
/* Add to the global thread list a new user-mode thread with system id THRID,
|
||||
lwp id LWPID, map address MAPP, and composite thread/process PID. */
|
||||
|
||||
static void
|
||||
add_thread_uw (int thrid, int lwpid, CORE_ADDR mapp, int pid)
|
||||
{
|
||||
|
|
@ -545,11 +521,10 @@ add_thread_uw (int thrid, int lwpid, CORE_ADDR mapp, int pid)
|
|||
printf_unfiltered ("[New %s]\n", target_pid_to_str (pid));
|
||||
}
|
||||
|
||||
/*
|
||||
* notice_threads() and find_main() callback: if the thread list doesn't
|
||||
* already contain the thread described by ITER, add it if it's the main
|
||||
* thread or if !DATA.
|
||||
*/
|
||||
/* notice_threads() and find_main() callback: if the thread list doesn't
|
||||
already contain the thread described by ITER, add it if it's the main
|
||||
thread or if !DATA. */
|
||||
|
||||
static int
|
||||
notice_thread (iter_t *iter, void *data)
|
||||
{
|
||||
|
|
@ -563,18 +538,16 @@ notice_thread (iter_t *iter, void *data)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Add to the thread list any threads it doesn't already contain.
|
||||
*/
|
||||
/* Add to the thread list any threads it doesn't already contain. */
|
||||
|
||||
static void
|
||||
notice_threads (void)
|
||||
{
|
||||
thread_iter (notice_thread, NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the address of the main thread's map. On error, return 0.
|
||||
*/
|
||||
/* Return the address of the main thread's map. On error, return 0. */
|
||||
|
||||
static CORE_ADDR
|
||||
find_main (void)
|
||||
{
|
||||
|
|
@ -588,12 +561,11 @@ find_main (void)
|
|||
return thr_map_main;
|
||||
}
|
||||
|
||||
/*
|
||||
* Attach to process specified by ARGS, then initialize for debugging it
|
||||
* and wait for the trace-trap that results from attaching.
|
||||
*
|
||||
* This function only gets called with uw_thread_active == 0.
|
||||
*/
|
||||
/* Attach to process specified by ARGS, then initialize for debugging it
|
||||
and wait for the trace-trap that results from attaching.
|
||||
|
||||
This function only gets called with uw_thread_active == 0. */
|
||||
|
||||
static void
|
||||
uw_thread_attach (char *args, int from_tty)
|
||||
{
|
||||
|
|
@ -602,9 +574,8 @@ uw_thread_attach (char *args, int from_tty)
|
|||
thr_infpid (NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Detach from the process attached to by uw_thread_attach().
|
||||
*/
|
||||
/* Detach from the process attached to by uw_thread_attach(). */
|
||||
|
||||
static void
|
||||
uw_thread_detach (char *args, int from_tty)
|
||||
{
|
||||
|
|
@ -612,10 +583,9 @@ uw_thread_detach (char *args, int from_tty)
|
|||
base_ops.to_detach (args, from_tty);
|
||||
}
|
||||
|
||||
/*
|
||||
* Tell the inferior process to continue running thread PID if >= 0
|
||||
* and all threads otherwise.
|
||||
*/
|
||||
/* Tell the inferior process to continue running thread PID if >= 0
|
||||
and all threads otherwise. */
|
||||
|
||||
static void
|
||||
uw_thread_resume (int pid, int step, enum target_signal signo)
|
||||
{
|
||||
|
|
@ -625,11 +595,10 @@ uw_thread_resume (int pid, int step, enum target_signal signo)
|
|||
CALL_BASE (base_ops.to_resume (pid, step, signo));
|
||||
}
|
||||
|
||||
/*
|
||||
* If the trap we just received from lwp PID was due to a breakpoint
|
||||
* on the libthread.so debugging stub, update this module's state
|
||||
* accordingly.
|
||||
*/
|
||||
/* If the trap we just received from lwp PID was due to a breakpoint
|
||||
on the libthread.so debugging stub, update this module's state
|
||||
accordingly. */
|
||||
|
||||
static void
|
||||
libthread_stub (int pid)
|
||||
{
|
||||
|
|
@ -710,14 +679,13 @@ libthread_stub (int pid)
|
|||
|
||||
if (change == tc_switch_complete)
|
||||
{
|
||||
/*
|
||||
* If switchto_thread is the main thread, then (a) the corresponding
|
||||
* tc_switch_begin probably received a null map argument and therefore
|
||||
* (b) it may have been a spurious switch following a tc_thread_exit.
|
||||
*
|
||||
* Therefore, explicitly query the thread's lwp before caching it in
|
||||
* its thread list entry.
|
||||
*/
|
||||
/* If switchto_thread is the main thread, then (a) the corresponding
|
||||
tc_switch_begin probably received a null map argument and therefore
|
||||
(b) it may have been a spurious switch following a tc_thread_exit.
|
||||
|
||||
Therefore, explicitly query the thread's lwp before caching it in
|
||||
its thread list entry. */
|
||||
|
||||
if (!read_map (switchto_thread->private->mapp, &map))
|
||||
goto err;
|
||||
if (map.thr_lwpp)
|
||||
|
|
@ -747,9 +715,8 @@ libthread_stub (int pid)
|
|||
dbgchange (change), tid ? dbgstate (map.thr_state) : ""));
|
||||
}
|
||||
|
||||
/*
|
||||
* Wait for thread/lwp/process ID if >= 0 or for any thread otherwise.
|
||||
*/
|
||||
/* Wait for thread/lwp/process ID if >= 0 or for any thread otherwise. */
|
||||
|
||||
static int
|
||||
uw_thread_wait (int pid, struct target_waitstatus *status)
|
||||
{
|
||||
|
|
@ -764,10 +731,9 @@ uw_thread_wait (int pid, struct target_waitstatus *status)
|
|||
return lwp_to_thr (pid);
|
||||
}
|
||||
|
||||
/*
|
||||
* Tell gdb about the registers in the thread/lwp/process specified by
|
||||
* inferior_pid.
|
||||
*/
|
||||
/* Tell gdb about the registers in the thread/lwp/process specified by
|
||||
inferior_pid. */
|
||||
|
||||
static void
|
||||
uw_thread_fetch_registers (int regno)
|
||||
{
|
||||
|
|
@ -788,30 +754,27 @@ uw_thread_fetch_registers (int regno)
|
|||
supply_fpregset (&map.thr_ucontext.uc_mcontext.fpregs);
|
||||
}
|
||||
|
||||
/*
|
||||
* Store gdb's current view of the register set into the thread/lwp/process
|
||||
* specified by inferior_pid.
|
||||
*/
|
||||
/* Store gdb's current view of the register set into the thread/lwp/process
|
||||
specified by inferior_pid. */
|
||||
|
||||
static void
|
||||
uw_thread_store_registers (int regno)
|
||||
{
|
||||
CALL_BASE (base_ops.to_store_registers (regno));
|
||||
}
|
||||
|
||||
/*
|
||||
* Prepare to modify the registers array.
|
||||
*/
|
||||
/* Prepare to modify the registers array. */
|
||||
|
||||
static void
|
||||
uw_thread_prepare_to_store (void)
|
||||
{
|
||||
CALL_BASE (base_ops.to_prepare_to_store ());
|
||||
}
|
||||
|
||||
/*
|
||||
* Fork an inferior process and start debugging it.
|
||||
*
|
||||
* This function only gets called with uw_thread_active == 0.
|
||||
*/
|
||||
/* Fork an inferior process and start debugging it.
|
||||
|
||||
This function only gets called with uw_thread_active == 0. */
|
||||
|
||||
static void
|
||||
uw_thread_create_inferior (char *exec_file, char *allargs, char **env)
|
||||
{
|
||||
|
|
@ -826,40 +789,35 @@ uw_thread_create_inferior (char *exec_file, char *allargs, char **env)
|
|||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Kill and forget about the inferior process.
|
||||
*/
|
||||
/* Kill and forget about the inferior process. */
|
||||
|
||||
static void
|
||||
uw_thread_kill (void)
|
||||
{
|
||||
base_ops.to_kill ();
|
||||
}
|
||||
|
||||
/*
|
||||
* Clean up after the inferior exits.
|
||||
*/
|
||||
/* Clean up after the inferior exits. */
|
||||
|
||||
static void
|
||||
uw_thread_mourn_inferior (void)
|
||||
{
|
||||
remove_thread_event_breakpoints ();
|
||||
deactivate_uw_thread ();
|
||||
base_ops.to_mourn_inferior ();
|
||||
}
|
||||
|
||||
/*
|
||||
* Return whether this module can attach to and run processes.
|
||||
*
|
||||
* This function only gets called with uw_thread_active == 0.
|
||||
*/
|
||||
/* Return whether this module can attach to and run processes.
|
||||
|
||||
This function only gets called with uw_thread_active == 0. */
|
||||
|
||||
static int
|
||||
uw_thread_can_run (void)
|
||||
{
|
||||
return procfs_suppress_run;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return whether thread PID is still valid.
|
||||
*/
|
||||
/* Return whether thread PID is still valid. */
|
||||
|
||||
static int
|
||||
uw_thread_alive (int pid)
|
||||
{
|
||||
|
|
@ -871,9 +829,8 @@ uw_thread_alive (int pid)
|
|||
return in_thread_list (pid);
|
||||
}
|
||||
|
||||
/*
|
||||
* Add to the thread list any threads and lwps it doesn't already contain.
|
||||
*/
|
||||
/* Add to the thread list any threads and lwps it doesn't already contain. */
|
||||
|
||||
static void
|
||||
uw_thread_find_new_threads (void)
|
||||
{
|
||||
|
|
@ -882,10 +839,9 @@ uw_thread_find_new_threads (void)
|
|||
notice_threads ();
|
||||
}
|
||||
|
||||
/*
|
||||
* Return a string for pretty-printing PID in "info threads" output.
|
||||
* This may be called by either procfs.c or by generic gdb.
|
||||
*/
|
||||
/* Return a string for pretty-printing PID in "info threads" output.
|
||||
This may be called by either procfs.c or by generic gdb. */
|
||||
|
||||
static char *
|
||||
uw_thread_pid_to_str (int pid)
|
||||
{
|
||||
|
|
@ -901,10 +857,9 @@ uw_thread_pid_to_str (int pid)
|
|||
return buf;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return a string displaying INFO state information in "info threads"
|
||||
* output.
|
||||
*/
|
||||
/* Return a string displaying INFO state information in "info threads"
|
||||
output. */
|
||||
|
||||
static char *
|
||||
uw_extra_thread_info (struct thread_info *info)
|
||||
{
|
||||
|
|
@ -947,15 +902,14 @@ uw_extra_thread_info (struct thread_info *info)
|
|||
return buf;
|
||||
}
|
||||
|
||||
/*
|
||||
* Check whether libthread.so has just been loaded, and if so, try to
|
||||
* initialize user-space thread debugging support.
|
||||
*
|
||||
* libthread.so loading happens while (a) an inferior process is being
|
||||
* started by procfs and (b) a core image is being loaded.
|
||||
*
|
||||
* This function often gets called with uw_thread_active == 0.
|
||||
*/
|
||||
/* Check whether libthread.so has just been loaded, and if so, try to
|
||||
initialize user-space thread debugging support.
|
||||
|
||||
libthread.so loading happens while (a) an inferior process is being
|
||||
started by procfs and (b) a core image is being loaded.
|
||||
|
||||
This function often gets called with uw_thread_active == 0. */
|
||||
|
||||
static void
|
||||
libthread_init (void)
|
||||
{
|
||||
|
|
@ -1026,17 +980,16 @@ libthread_init (void)
|
|||
deactivate_uw_thread ();
|
||||
}
|
||||
|
||||
/*
|
||||
* target_new_objfile_hook callback.
|
||||
*
|
||||
* If OBJFILE is non-null, check whether libthread.so was just loaded,
|
||||
* and if so, prepare for user-mode thread debugging.
|
||||
*
|
||||
* If OBJFILE is null, libthread.so has gone away, so stop debugging
|
||||
* user-mode threads.
|
||||
*
|
||||
* This function often gets called with uw_thread_active == 0.
|
||||
*/
|
||||
/* target_new_objfile_hook callback.
|
||||
|
||||
If OBJFILE is non-null, check whether libthread.so was just loaded,
|
||||
and if so, prepare for user-mode thread debugging.
|
||||
|
||||
If OBJFILE is null, libthread.so has gone away, so stop debugging
|
||||
user-mode threads.
|
||||
|
||||
This function often gets called with uw_thread_active == 0. */
|
||||
|
||||
static void
|
||||
uw_thread_new_objfile (struct objfile *objfile)
|
||||
{
|
||||
|
|
@ -1050,9 +1003,8 @@ uw_thread_new_objfile (struct objfile *objfile)
|
|||
target_new_objfile_chain (objfile);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize uw_thread_ops.
|
||||
*/
|
||||
/* Initialize uw_thread_ops. */
|
||||
|
||||
static void
|
||||
init_uw_thread_ops (void)
|
||||
{
|
||||
|
|
@ -1078,10 +1030,9 @@ init_uw_thread_ops (void)
|
|||
uw_thread_ops.to_magic = OPS_MAGIC;
|
||||
}
|
||||
|
||||
/*
|
||||
* Module startup initialization function, automagically called by
|
||||
* init.c.
|
||||
*/
|
||||
/* Module startup initialization function, automagically called by
|
||||
init.c. */
|
||||
|
||||
void
|
||||
_initialize_uw_thread (void)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue