1 /* -*- mode: C; c-basic-offset: 3; indent-tabs-mode: nil; -*- */
3 This file is part of drd, a thread error detector.
5 Copyright (C) 2006-2011 Bart Van Assche <bvanassche@acm.org>.
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 The GNU General Public License is contained in the file COPYING.
26 #include "drd_clientobj.h"
27 #include "drd_suppression.h"
28 #include "pub_tool_basics.h"
29 #include "pub_tool_libcassert.h"
30 #include "pub_tool_libcbase.h"
31 #include "pub_tool_libcprint.h" // VG_(message)()
32 #include "pub_tool_mallocfree.h"
33 #include "pub_tool_options.h" // VG_(clo_backtrace_size)
34 #include "pub_tool_oset.h"
35 #include "pub_tool_stacktrace.h"
36 #include "pub_tool_threadstate.h" // VG_(get_running_tid)()
39 /* Local variables. */
41 static OSet* s_clientobj_set;
42 static Bool s_trace_clientobj;
45 /* Local functions. */
47 static Bool clientobj_remove_obj(DrdClientobj* const p);
50 /* Function definitions. */
52 void DRD_(clientobj_set_trace)(const Bool trace)
54 s_trace_clientobj = trace;
57 /** Initialize the client object set. */
58 void DRD_(clientobj_init)(void)
60 tl_assert(s_clientobj_set == 0);
61 s_clientobj_set = VG_(OSetGen_Create)(0, 0, VG_(malloc),
62 "drd.clientobj.ci.1", VG_(free));
63 tl_assert(s_clientobj_set);
67 * Free the memory allocated for the client object set.
69 * @pre Client object set is empty.
71 void DRD_(clientobj_cleanup)(void)
73 tl_assert(s_clientobj_set);
74 tl_assert(VG_(OSetGen_Size)(s_clientobj_set) == 0);
75 VG_(OSetGen_Destroy)(s_clientobj_set);
80 * Return the data associated with the client object at client address addr.
81 * Return 0 if there is no client object in the set with the specified start
84 DrdClientobj* DRD_(clientobj_get_any)(const Addr addr)
86 return VG_(OSetGen_Lookup)(s_clientobj_set, &addr);
90 * Return the data associated with the client object at client address addr
91 * and that has object type t. Return 0 if there is no client object in the
92 * set with the specified start address.
94 DrdClientobj* DRD_(clientobj_get)(const Addr addr, const ObjType t)
97 p = VG_(OSetGen_Lookup)(s_clientobj_set, &addr);
98 if (p && p->any.type == t)
103 /** Return true if and only if the address range of any client object overlaps
104 * with the specified address range.
106 Bool DRD_(clientobj_present)(const Addr a1, const Addr a2)
111 VG_(OSetGen_ResetIter)(s_clientobj_set);
112 for ( ; (p = VG_(OSetGen_Next)(s_clientobj_set)) != 0; )
114 if (a1 <= p->any.a1 && p->any.a1 < a2)
123 * Add state information for the client object at client address addr and
124 * of type t. Suppress data race reports on the address range [addr,addr+size[.
126 * @pre No other client object is present in the address range [addr,addr+size[.
128 DrdClientobj* DRD_(clientobj_add)(const Addr a1, const ObjType t)
132 tl_assert(! DRD_(clientobj_present)(a1, a1 + 1));
133 tl_assert(VG_(OSetGen_Lookup)(s_clientobj_set, &a1) == 0);
135 if (s_trace_clientobj)
137 VG_(message)(Vg_UserMsg, "Adding client object 0x%lx of type %d\n", a1, t);
140 p = VG_(OSetGen_AllocNode)(s_clientobj_set, sizeof(*p));
141 VG_(memset)(p, 0, sizeof(*p));
144 p->any.first_observed_at = VG_(record_ExeContext)(VG_(get_running_tid)(), 0);
145 VG_(OSetGen_Insert)(s_clientobj_set, p);
146 tl_assert(VG_(OSetGen_Lookup)(s_clientobj_set, &a1) == p);
147 if (t == ClientHbvar)
148 DRD_(mark_hbvar)(a1);
150 DRD_(start_suppression)(a1, a1 + 1, "clientobj");
155 * Remove the information that was stored about the client object.
157 * @param[in] addr Address of the client object in the client address space.
158 * @param[in] t Type of the client object.
160 Bool DRD_(clientobj_remove)(const Addr addr, const ObjType t)
164 p = VG_(OSetGen_Lookup)(s_clientobj_set, &addr);
166 tl_assert(p->any.type == t);
167 return clientobj_remove_obj(p);
171 * Remove the information that was stored about the client object p.
173 * @note The order of operations below is important. The client object is
174 * removed from the client object set after the cleanup function has been
175 * called such that if the cleanup function can still use the function
176 * DRD_(clientobj_get_any)(). This happens e.g. in the function
177 * first_observed() in drd_error.c.
179 static Bool clientobj_remove_obj(DrdClientobj* const p)
183 if (s_trace_clientobj)
185 VG_(message)(Vg_UserMsg, "Removing client object 0x%lx of type %d\n",
186 p->any.a1, p->any.type);
188 VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(),
189 VG_(clo_backtrace_size));
193 tl_assert(p->any.cleanup);
194 (*p->any.cleanup)(p);
195 VG_(OSetGen_Remove)(s_clientobj_set, &p->any.a1);
196 VG_(OSetGen_FreeNode)(s_clientobj_set, p);
201 * Clean up all client objects p for which their start address p->any.a1 fits
202 * inside the address range [ a1, a2 [.
204 * @note The implementation of this function relies on the fact that the
205 * data in s_clientobj_set is sorted on the start address of client objects.
207 void DRD_(clientobj_stop_using_mem)(const Addr a1, const Addr a2)
212 tl_assert(s_clientobj_set);
214 if (! DRD_(range_contains_suppression_or_hbvar)(a1, a2))
217 VG_(OSetGen_ResetIterAt)(s_clientobj_set, &a1);
218 for ( ; (p = VG_(OSetGen_Next)(s_clientobj_set)) != 0 && p->any.a1 < a2; )
220 tl_assert(a1 <= p->any.a1);
221 removed_at = p->any.a1;
222 clientobj_remove_obj(p);
224 * The above call removes an element from the oset and hence
225 * invalidates the iterator. Restore the iterator.
227 VG_(OSetGen_ResetIterAt)(s_clientobj_set, &removed_at);
232 * Delete the per-thread information stored in client objects for the
235 void DRD_(clientobj_delete_thread)(const DrdThreadId tid)
239 VG_(OSetGen_ResetIter)(s_clientobj_set);
240 for ( ; (p = VG_(OSetGen_Next)(s_clientobj_set)) != 0; )
242 if (p->any.delete_thread)
244 (*p->any.delete_thread)(p, tid);
249 const char* DRD_(clientobj_type_name)(const ObjType t)
253 case ClientMutex: return "mutex";
254 case ClientCondvar: return "cond";
255 case ClientHbvar: return "order annotation";
256 case ClientSemaphore: return "semaphore";
257 case ClientBarrier: return "barrier";
258 case ClientRwlock: return "rwlock";