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2002-11-11 Elena Zannoni <ezannoni@redhat.com>

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* findvar.c (read_var_value): Reenable TLS code.

2002-11-11  Elena Zannoni  <ezannoni@redhat.com>
            Jim Blandy  <jimb@redhat.com>

	* gdb_thread_db.h (enum): Add TD_NOTALLOC.
	* target.c (update_current_target): Add
	to_get_thread_local_address.
	* target.h (to_get_thread_local_address): Export.
	(target_get_thread_local_address): Define.
	(target_get_thread_local_address_p): Define.
	* thread-db.c: Include solib-svr4.h.
	(td_thr_tls_get_addr_p): Define.
	(thread_db_load): Get a pointer to td_thr_tls_get_addr.
	(thread_db_get_thread_local_address): New function.
	(init_thread_db_ops): Initialize to_get_thread_local_address.
	* configure.in: Add test for TD_NOTALLOC in thread_db.h.
	* configure: Regenerate.
	* config.in: Regenerate.
This commit is contained in:
Elena Zannoni
2002-11-12 02:39:41 +00:00
parent 4894709537
commit 3f47be5ca1
9 changed files with 264 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

100
gdb/thread-db.c
View File

@@ -32,6 +32,7 @@
#include "objfiles.h"
#include "target.h"
#include "regcache.h"
#include "solib-svr4.h"
#ifndef LIBTHREAD_DB_SO
#define LIBTHREAD_DB_SO "libthread_db.so.1"
@@ -108,6 +109,11 @@ static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th,
prgregset_t gregs);
static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th, int event);
static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th,
void *map_address,
size_t offset,
void **address);
/* Location of the thread creation event breakpoint. The code at this
location in the child process will be called by the pthread library
whenever a new thread is created. By setting a special breakpoint
@@ -348,6 +354,7 @@ thread_db_load (void)
td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr");
return 1;
}
@@ -1003,6 +1010,97 @@ thread_db_pid_to_str (ptid_t ptid)
return normal_pid_to_str (ptid);
}
/* Get the address of the thread local variable in OBJFILE which is
stored at OFFSET within the thread local storage for thread PTID. */
static CORE_ADDR
thread_db_get_thread_local_address (ptid_t ptid, struct objfile *objfile,
CORE_ADDR offset)
{
if (is_thread (ptid))
{
int objfile_is_library = (objfile->flags & OBJF_SHARED);
td_err_e err;
td_thrhandle_t th;
void *address;
CORE_ADDR lm;
/* glibc doesn't provide the needed interface. */
if (! td_thr_tls_get_addr_p)
error ("Cannot find thread-local variables in this thread library.");
/* Get the address of the link map for this objfile. */
lm = svr4_fetch_objfile_link_map (objfile);
/* Whoops, we couldn't find one. Bail out. */
if (!lm)
{
if (objfile_is_library)
error ("Cannot find shared library `%s' link_map in dynamic"
" linker's module list", objfile->name);
else
error ("Cannot find executable file `%s' link_map in dynamic"
" linker's module list", objfile->name);
}
/* Get info about the thread. */
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (ptid), &th);
if (err != TD_OK)
error ("Cannot find thread %ld: %s",
(long) GET_THREAD (ptid), thread_db_err_str (err));
/* Finally, get the address of the variable. */
err = td_thr_tls_get_addr_p (&th, (void *) lm, offset, &address);
#ifdef THREAD_DB_HAS_TD_NOTALLOC
/* The memory hasn't been allocated, yet. */
if (err == TD_NOTALLOC)
{
/* Now, if libthread_db provided the initialization image's
address, we *could* try to build a non-lvalue value from
the initialization image. */
if (objfile_is_library)
error ("The inferior has not yet allocated storage for"
" thread-local variables in\n"
"the shared library `%s'\n"
"for the thread %ld",
objfile->name, (long) GET_THREAD (ptid));
else
error ("The inferior has not yet allocated storage for"
" thread-local variables in\n"
"the executable `%s'\n"
"for the thread %ld",
objfile->name, (long) GET_THREAD (ptid));
}
#endif
/* Something else went wrong. */
if (err != TD_OK)
{
if (objfile_is_library)
error ("Cannot find thread-local storage for thread %ld, "
"shared library %s:\n%s",
(long) GET_THREAD (ptid),
objfile->name,
thread_db_err_str (err));
else
error ("Cannot find thread-local storage for thread %ld, "
"executable file %s:\n%s",
(long) GET_THREAD (ptid),
objfile->name,
thread_db_err_str (err));
}
/* Cast assuming host == target. Joy. */
return (CORE_ADDR) address;
}
if (target_beneath->to_get_thread_local_address)
return target_beneath->to_get_thread_local_address (ptid, objfile, offset);
error ("Cannot find thread-local values on this target.");
}
static void
init_thread_db_ops (void)
{
@@ -1025,6 +1123,8 @@ init_thread_db_ops (void)
thread_db_ops.to_pid_to_str = thread_db_pid_to_str;
thread_db_ops.to_stratum = thread_stratum;
thread_db_ops.to_has_thread_control = tc_schedlock;
thread_db_ops.to_get_thread_local_address
= thread_db_get_thread_local_address;
thread_db_ops.to_magic = OPS_MAGIC;
}