| /* |
| This file is part of drd, a thread error detector. |
| |
| Copyright (C) 2006-2013 Bart Van Assche <bvanassche@acm.org>. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| |
| #include "drd_barrier.h" |
| #include "drd_clientobj.h" |
| #include "drd_clientreq.h" |
| #include "drd_cond.h" |
| #include "drd_error.h" |
| #include "drd_hb.h" |
| #include "drd_load_store.h" |
| #include "drd_malloc_wrappers.h" |
| #include "drd_mutex.h" |
| #include "drd_rwlock.h" |
| #include "drd_segment.h" |
| #include "drd_semaphore.h" |
| #include "drd_suppression.h" |
| #include "drd_thread.h" |
| #include "libvex_guest_offsets.h" |
| #include "pub_drd_bitmap.h" |
| #include "pub_tool_vki.h" // Must be included before pub_tool_libcproc |
| #include "pub_tool_basics.h" |
| #include "pub_tool_libcassert.h" // tl_assert() |
| #include "pub_tool_libcbase.h" // VG_(strcmp) |
| #include "pub_tool_libcprint.h" // VG_(printf) |
| #include "pub_tool_libcproc.h" // VG_(getenv)() |
| #include "pub_tool_machine.h" |
| #include "pub_tool_mallocfree.h" // VG_(malloc)(), VG_(free)() |
| #include "pub_tool_options.h" // command line options |
| #include "pub_tool_replacemalloc.h" |
| #include "pub_tool_threadstate.h" // VG_(get_running_tid)() |
| #include "pub_tool_tooliface.h" |
| #include "pub_tool_aspacemgr.h" // VG_(am_is_valid_for_client) |
| |
| |
| /* Local variables. */ |
| |
| static Bool s_print_stats; |
| static Bool s_var_info; |
| static Bool s_show_stack_usage; |
| static Bool s_trace_alloc; |
| static Bool trace_sectsuppr; |
| |
| |
| /** |
| * Implement the needs_command_line_options for drd. |
| */ |
| static Bool DRD_(process_cmd_line_option)(const HChar* arg) |
| { |
| int check_stack_accesses = -1; |
| int join_list_vol = -1; |
| int exclusive_threshold_ms = -1; |
| int first_race_only = -1; |
| int report_signal_unlocked = -1; |
| int segment_merging = -1; |
| int segment_merge_interval = -1; |
| int shared_threshold_ms = -1; |
| int show_confl_seg = -1; |
| int trace_barrier = -1; |
| int trace_clientobj = -1; |
| int trace_cond = -1; |
| int trace_csw = -1; |
| int trace_fork_join = -1; |
| int trace_hb = -1; |
| int trace_conflict_set = -1; |
| int trace_conflict_set_bm = -1; |
| int trace_mutex = -1; |
| int trace_rwlock = -1; |
| int trace_segment = -1; |
| int trace_semaphore = -1; |
| int trace_suppression = -1; |
| const HChar* trace_address = 0; |
| const HChar* ptrace_address= 0; |
| |
| if VG_BOOL_CLO(arg, "--check-stack-var", check_stack_accesses) {} |
| else if VG_INT_CLO (arg, "--join-list-vol", join_list_vol) {} |
| else if VG_BOOL_CLO(arg, "--drd-stats", s_print_stats) {} |
| else if VG_BOOL_CLO(arg, "--first-race-only", first_race_only) {} |
| else if VG_BOOL_CLO(arg, "--free-is-write", DRD_(g_free_is_write)) {} |
| else if VG_BOOL_CLO(arg,"--report-signal-unlocked",report_signal_unlocked) |
| {} |
| else if VG_BOOL_CLO(arg, "--segment-merging", segment_merging) {} |
| else if VG_INT_CLO (arg, "--segment-merging-interval", segment_merge_interval) |
| {} |
| else if VG_BOOL_CLO(arg, "--show-confl-seg", show_confl_seg) {} |
| else if VG_BOOL_CLO(arg, "--show-stack-usage", s_show_stack_usage) {} |
| else if VG_BOOL_CLO(arg, "--trace-alloc", s_trace_alloc) {} |
| else if VG_BOOL_CLO(arg, "--trace-barrier", trace_barrier) {} |
| else if VG_BOOL_CLO(arg, "--trace-clientobj", trace_clientobj) {} |
| else if VG_BOOL_CLO(arg, "--trace-cond", trace_cond) {} |
| else if VG_BOOL_CLO(arg, "--trace-conflict-set", trace_conflict_set) {} |
| else if VG_BOOL_CLO(arg, "--trace-conflict-set-bm", trace_conflict_set_bm){} |
| else if VG_BOOL_CLO(arg, "--trace-csw", trace_csw) {} |
| else if VG_BOOL_CLO(arg, "--trace-fork-join", trace_fork_join) {} |
| else if VG_BOOL_CLO(arg, "--trace-hb", trace_hb) {} |
| else if VG_BOOL_CLO(arg, "--trace-mutex", trace_mutex) {} |
| else if VG_BOOL_CLO(arg, "--trace-rwlock", trace_rwlock) {} |
| else if VG_BOOL_CLO(arg, "--trace-sectsuppr", trace_sectsuppr) {} |
| else if VG_BOOL_CLO(arg, "--trace-segment", trace_segment) {} |
| else if VG_BOOL_CLO(arg, "--trace-semaphore", trace_semaphore) {} |
| else if VG_BOOL_CLO(arg, "--trace-suppr", trace_suppression) {} |
| else if VG_BOOL_CLO(arg, "--var-info", s_var_info) {} |
| else if VG_BOOL_CLO(arg, "--verify-conflict-set", DRD_(verify_conflict_set)) |
| {} |
| else if VG_INT_CLO (arg, "--exclusive-threshold", exclusive_threshold_ms) {} |
| else if VG_STR_CLO (arg, "--ptrace-addr", ptrace_address) {} |
| else if VG_INT_CLO (arg, "--shared-threshold", shared_threshold_ms) {} |
| else if VG_STR_CLO (arg, "--trace-addr", trace_address) {} |
| else |
| return VG_(replacement_malloc_process_cmd_line_option)(arg); |
| |
| if (check_stack_accesses != -1) |
| DRD_(set_check_stack_accesses)(check_stack_accesses); |
| if (exclusive_threshold_ms != -1) |
| { |
| DRD_(mutex_set_lock_threshold)(exclusive_threshold_ms); |
| DRD_(rwlock_set_exclusive_threshold)(exclusive_threshold_ms); |
| } |
| if (first_race_only != -1) |
| { |
| DRD_(set_first_race_only)(first_race_only); |
| } |
| if (join_list_vol != -1) |
| DRD_(thread_set_join_list_vol)(join_list_vol); |
| if (report_signal_unlocked != -1) |
| { |
| DRD_(cond_set_report_signal_unlocked)(report_signal_unlocked); |
| } |
| if (shared_threshold_ms != -1) |
| { |
| DRD_(rwlock_set_shared_threshold)(shared_threshold_ms); |
| } |
| if (segment_merging != -1) |
| DRD_(thread_set_segment_merging)(segment_merging); |
| if (segment_merge_interval != -1) |
| DRD_(thread_set_segment_merge_interval)(segment_merge_interval); |
| if (show_confl_seg != -1) |
| DRD_(set_show_conflicting_segments)(show_confl_seg); |
| if (trace_address) { |
| const Addr addr = VG_(strtoll16)(trace_address, 0); |
| DRD_(start_tracing_address_range)(addr, addr + 1, False); |
| } |
| if (ptrace_address) { |
| char *plus = VG_(strchr)(ptrace_address, '+'); |
| Addr addr, length; |
| if (plus) |
| *plus = '\0'; |
| addr = VG_(strtoll16)(ptrace_address, 0); |
| length = plus ? VG_(strtoll16)(plus + 1, 0) : 1; |
| DRD_(start_tracing_address_range)(addr, addr + length, True); |
| } |
| if (trace_barrier != -1) |
| DRD_(barrier_set_trace)(trace_barrier); |
| if (trace_clientobj != -1) |
| DRD_(clientobj_set_trace)(trace_clientobj); |
| if (trace_cond != -1) |
| DRD_(cond_set_trace)(trace_cond); |
| if (trace_csw != -1) |
| DRD_(thread_trace_context_switches)(trace_csw); |
| if (trace_fork_join != -1) |
| DRD_(thread_set_trace_fork_join)(trace_fork_join); |
| if (trace_hb != -1) |
| DRD_(hb_set_trace)(trace_hb); |
| if (trace_conflict_set != -1) |
| DRD_(thread_trace_conflict_set)(trace_conflict_set); |
| if (trace_conflict_set_bm != -1) |
| DRD_(thread_trace_conflict_set_bm)(trace_conflict_set_bm); |
| if (trace_mutex != -1) |
| DRD_(mutex_set_trace)(trace_mutex); |
| if (trace_rwlock != -1) |
| DRD_(rwlock_set_trace)(trace_rwlock); |
| if (trace_segment != -1) |
| DRD_(sg_set_trace)(trace_segment); |
| if (trace_semaphore != -1) |
| DRD_(semaphore_set_trace)(trace_semaphore); |
| if (trace_suppression != -1) |
| DRD_(suppression_set_trace)(trace_suppression); |
| |
| return True; |
| } |
| |
| static void DRD_(print_usage)(void) |
| { |
| VG_(printf)( |
| " --check-stack-var=yes|no Whether or not to report data races on\n" |
| " stack variables [no].\n" |
| " --exclusive-threshold=<n> Print an error message if any mutex or\n" |
| " writer lock is held longer than the specified\n" |
| " time (in milliseconds) [off].\n" |
| " --first-race-only=yes|no Only report the first data race that occurs on\n" |
| " a memory location instead of all races [no].\n" |
| " --free-is-write=yes|no Whether to report races between freeing memory\n" |
| " and subsequent accesses of that memory[no].\n" |
| " --join-list-vol=<n> Number of threads to delay cleanup for [10].\n" |
| " --report-signal-unlocked=yes|no Whether to report calls to\n" |
| " pthread_cond_signal() where the mutex associated\n" |
| " with the signal via pthread_cond_wait() is not\n" |
| " locked at the time the signal is sent [yes].\n" |
| " --segment-merging=yes|no Controls segment merging [yes].\n" |
| " Segment merging is an algorithm to limit memory usage of the\n" |
| " data race detection algorithm. Disabling segment merging may\n" |
| " improve the accuracy of the so-called 'other segments' displayed\n" |
| " in race reports but can also trigger an out of memory error.\n" |
| " --segment-merging-interval=<n> Perform segment merging every time n new\n" |
| " segments have been created. Default: %d.\n" |
| " --shared-threshold=<n> Print an error message if a reader lock\n" |
| " is held longer than the specified time (in\n" |
| " milliseconds) [off]\n" |
| " --show-confl-seg=yes|no Show conflicting segments in race reports [yes].\n" |
| " --show-stack-usage=yes|no Print stack usage at thread exit time [no].\n" |
| "\n" |
| " drd options for monitoring process behavior:\n" |
| " --ptrace-addr=<address>[+<length>] Trace all load and store activity for\n" |
| " the specified address range and keep doing that\n" |
| " even after the memory at that address has been\n" |
| " freed and reallocated [off].\n" |
| " --trace-addr=<address> Trace all load and store activity for the\n" |
| " specified address [off].\n" |
| " --trace-alloc=yes|no Trace all memory allocations and deallocations\n" |
| " [no].\n" |
| " --trace-barrier=yes|no Trace all barrier activity [no].\n" |
| " --trace-cond=yes|no Trace all condition variable activity [no].\n" |
| " --trace-fork-join=yes|no Trace all thread fork/join activity [no].\n" |
| " --trace-hb=yes|no Trace ANNOTATE_HAPPENS_BEFORE() etc. [no].\n" |
| " --trace-mutex=yes|no Trace all mutex activity [no].\n" |
| " --trace-rwlock=yes|no Trace all reader-writer lock activity[no].\n" |
| " --trace-semaphore=yes|no Trace all semaphore activity [no].\n", |
| DRD_(thread_get_segment_merge_interval)() |
| ); |
| } |
| |
| static void DRD_(print_debug_usage)(void) |
| { |
| VG_(printf)( |
| " --drd-stats=yes|no Print statistics about DRD activity [no].\n" |
| " --trace-clientobj=yes|no Trace all client object activity [no].\n" |
| " --trace-csw=yes|no Trace all scheduler context switches [no].\n" |
| " --trace-conflict-set=yes|no Trace all conflict set updates [no].\n" |
| " --trace-conflict-set-bm=yes|no Trace all conflict set bitmap\n" |
| " updates [no]. Note: enabling this option\n" |
| " will generate a lot of output !\n" |
| " --trace-sectsuppr=yes|no Trace which the dynamic library sections on\n" |
| " which data race detection is suppressed.\n" |
| " --trace-segment=yes|no Trace segment actions [no].\n" |
| " --trace-suppr=yes|no Trace all address suppression actions [no].\n" |
| " --verify-conflict-set=yes|no Verify conflict set consistency [no].\n" |
| ); |
| } |
| |
| |
| // |
| // Implements the thread-related core callbacks. |
| // |
| |
| static void drd_pre_mem_read(const CorePart part, |
| const ThreadId tid, |
| const HChar* const s, |
| const Addr a, |
| const SizeT size) |
| { |
| DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); |
| if (size > 0) |
| { |
| DRD_(trace_load)(a, size); |
| } |
| } |
| |
| static void drd_pre_mem_read_asciiz(const CorePart part, |
| const ThreadId tid, |
| const HChar* const s, |
| const Addr a) |
| { |
| const HChar* p = (void*)a; |
| SizeT size = 0; |
| |
| // Don't segfault if the string starts in an obviously stupid |
| // place. Actually we should check the whole string, not just |
| // the start address, but that's too much trouble. At least |
| // checking the first byte is better than nothing. See #255009. |
| if (!VG_(am_is_valid_for_client) (a, 1, VKI_PROT_READ)) |
| return; |
| |
| /* Note: the expression '*p' reads client memory and may crash if the */ |
| /* client provided an invalid pointer ! */ |
| while (*p) |
| { |
| p++; |
| size++; |
| } |
| if (size > 0) |
| { |
| DRD_(trace_load)(a, size); |
| } |
| } |
| |
| static void drd_post_mem_write(const CorePart part, |
| const ThreadId tid, |
| const Addr a, |
| const SizeT size) |
| { |
| DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); |
| if (size > 0) |
| { |
| DRD_(trace_store)(a, size); |
| } |
| } |
| |
| static __inline__ |
| void drd_start_using_mem(const Addr a1, const SizeT len, |
| const Bool is_stack_mem) |
| { |
| const Addr a2 = a1 + len; |
| |
| tl_assert(a1 <= a2); |
| |
| if (!is_stack_mem && s_trace_alloc) |
| DRD_(trace_msg)("Started using memory range 0x%lx + %ld%s", |
| a1, len, DRD_(running_thread_inside_pthread_create)() |
| ? " (inside pthread_create())" : ""); |
| |
| if (!is_stack_mem && DRD_(g_free_is_write)) |
| DRD_(thread_stop_using_mem)(a1, a2); |
| |
| if (UNLIKELY(DRD_(any_address_is_traced)())) |
| { |
| DRD_(trace_mem_access)(a1, len, eStart, 0, 0); |
| } |
| |
| if (UNLIKELY(DRD_(running_thread_inside_pthread_create)())) |
| { |
| DRD_(start_suppression)(a1, a2, "pthread_create()"); |
| } |
| } |
| |
| static void drd_start_using_mem_w_ecu(const Addr a1, |
| const SizeT len, |
| UInt ec_uniq) |
| { |
| drd_start_using_mem(a1, len, False); |
| } |
| |
| static void drd_start_using_mem_w_tid(const Addr a1, |
| const SizeT len, |
| ThreadId tid) |
| { |
| drd_start_using_mem(a1, len, False); |
| } |
| |
| static __inline__ |
| void drd_stop_using_mem(const Addr a1, const SizeT len, |
| const Bool is_stack_mem) |
| { |
| const Addr a2 = a1 + len; |
| |
| tl_assert(a1 <= a2); |
| |
| if (UNLIKELY(DRD_(any_address_is_traced)())) |
| DRD_(trace_mem_access)(a1, len, eEnd, 0, 0); |
| |
| if (!is_stack_mem && s_trace_alloc) |
| DRD_(trace_msg)("Stopped using memory range 0x%lx + %ld", |
| a1, len); |
| |
| if (!is_stack_mem || DRD_(get_check_stack_accesses)()) |
| { |
| if (is_stack_mem || !DRD_(g_free_is_write)) |
| DRD_(thread_stop_using_mem)(a1, a2); |
| else if (DRD_(g_free_is_write)) |
| DRD_(trace_store)(a1, len); |
| DRD_(clientobj_stop_using_mem)(a1, a2); |
| DRD_(suppression_stop_using_mem)(a1, a2); |
| } |
| } |
| |
| static __inline__ |
| void drd_stop_using_nonstack_mem(const Addr a1, const SizeT len) |
| { |
| drd_stop_using_mem(a1, len, False); |
| } |
| |
| /** |
| * Discard all information DRD has about memory accesses and client objects |
| * in the specified address range. |
| */ |
| void DRD_(clean_memory)(const Addr a1, const SizeT len) |
| { |
| const Bool is_stack_memory = DRD_(thread_address_on_any_stack)(a1); |
| drd_stop_using_mem(a1, len, is_stack_memory); |
| drd_start_using_mem(a1, len, is_stack_memory); |
| } |
| |
| /** |
| * Suppress data race reports on all addresses contained in .plt, .got and |
| * .got.plt sections inside the address range [ a, a + len [. The data in |
| * these sections is modified by _dl_relocate_object() every time a function |
| * in a shared library is called for the first time. Since the first call |
| * to a function in a shared library can happen from a multithreaded context, |
| * such calls can cause conflicting accesses. See also Ulrich Drepper's |
| * paper "How to Write Shared Libraries" for more information about relocation |
| * (http://people.redhat.com/drepper/dsohowto.pdf). |
| * Note: the contents of the .got section is only modified by the MIPS resolver. |
| */ |
| static void DRD_(suppress_relocation_conflicts)(const Addr a, const SizeT len) |
| { |
| const DebugInfo* di; |
| |
| if (trace_sectsuppr) |
| VG_(dmsg)("Evaluating range @ 0x%lx size %ld\n", a, len); |
| |
| for (di = VG_(next_DebugInfo)(0); di; di = VG_(next_DebugInfo)(di)) { |
| Addr avma; |
| SizeT size; |
| |
| if (trace_sectsuppr) |
| VG_(dmsg)("Examining %s / %s\n", VG_(DebugInfo_get_filename)(di), |
| VG_(DebugInfo_get_soname)(di)); |
| |
| /* |
| * Suppress the race report on the libpthread global variable |
| * __pthread_multiple_threads. See also |
| * http://bugs.kde.org/show_bug.cgi?id=323905. |
| */ |
| avma = VG_(DebugInfo_get_bss_avma)(di); |
| size = VG_(DebugInfo_get_bss_size)(di); |
| tl_assert((avma && size) || (avma == 0 && size == 0)); |
| if (size > 0 && |
| VG_(strcmp)(VG_(DebugInfo_get_soname)(di), "libpthread.so.0") == 0) { |
| if (trace_sectsuppr) |
| VG_(dmsg)("Suppressing .bss @ 0x%lx size %ld\n", avma, size); |
| tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectBSS); |
| DRD_(start_suppression)(avma, avma + size, ".bss"); |
| } |
| |
| avma = VG_(DebugInfo_get_plt_avma)(di); |
| size = VG_(DebugInfo_get_plt_size)(di); |
| tl_assert((avma && size) || (avma == 0 && size == 0)); |
| if (size > 0) { |
| if (trace_sectsuppr) |
| VG_(dmsg)("Suppressing .plt @ 0x%lx size %ld\n", avma, size); |
| tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectPLT); |
| DRD_(start_suppression)(avma, avma + size, ".plt"); |
| } |
| |
| avma = VG_(DebugInfo_get_gotplt_avma)(di); |
| size = VG_(DebugInfo_get_gotplt_size)(di); |
| tl_assert((avma && size) || (avma == 0 && size == 0)); |
| if (size > 0) { |
| if (trace_sectsuppr) |
| VG_(dmsg)("Suppressing .got.plt @ 0x%lx size %ld\n", avma, size); |
| tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectGOTPLT); |
| DRD_(start_suppression)(avma, avma + size, ".gotplt"); |
| } |
| |
| avma = VG_(DebugInfo_get_got_avma)(di); |
| size = VG_(DebugInfo_get_got_size)(di); |
| tl_assert((avma && size) || (avma == 0 && size == 0)); |
| if (size > 0) { |
| if (trace_sectsuppr) |
| VG_(dmsg)("Suppressing .got @ 0x%lx size %ld\n", avma, size); |
| tl_assert(VG_(DebugInfo_sect_kind)(NULL, avma) == Vg_SectGOT); |
| DRD_(start_suppression)(avma, avma + size, ".got"); |
| } |
| } |
| } |
| |
| static |
| void drd_start_using_mem_w_perms(const Addr a, const SizeT len, |
| const Bool rr, const Bool ww, const Bool xx, |
| ULong di_handle) |
| { |
| DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); |
| |
| drd_start_using_mem(a, len, False); |
| |
| DRD_(suppress_relocation_conflicts)(a, len); |
| } |
| |
| /** |
| * Called by the core when the stack of a thread grows, to indicate that |
| * the addresses in range [ a, a + len [ may now be used by the client. |
| * Assumption: stacks grow downward. |
| */ |
| static __inline__ |
| void drd_start_using_mem_stack2(const DrdThreadId tid, const Addr a, |
| const SizeT len) |
| { |
| DRD_(thread_set_stack_min)(tid, a - VG_STACK_REDZONE_SZB); |
| drd_start_using_mem(a - VG_STACK_REDZONE_SZB, len + VG_STACK_REDZONE_SZB, |
| True); |
| } |
| |
| static __inline__ |
| void drd_start_using_mem_stack(const Addr a, const SizeT len) |
| { |
| drd_start_using_mem_stack2(DRD_(thread_get_running_tid)(), a, len); |
| } |
| |
| /** |
| * Called by the core when the stack of a thread shrinks, to indicate that |
| * the addresses [ a, a + len [ are no longer accessible for the client. |
| * Assumption: stacks grow downward. |
| */ |
| static __inline__ |
| void drd_stop_using_mem_stack2(const DrdThreadId tid, const Addr a, |
| const SizeT len) |
| { |
| DRD_(thread_set_stack_min)(tid, a + len - VG_STACK_REDZONE_SZB); |
| drd_stop_using_mem(a - VG_STACK_REDZONE_SZB, len + VG_STACK_REDZONE_SZB, |
| True); |
| } |
| |
| static __inline__ |
| void drd_stop_using_mem_stack(const Addr a, const SizeT len) |
| { |
| drd_stop_using_mem_stack2(DRD_(thread_get_running_tid)(), a, len); |
| } |
| |
| static |
| Bool on_alt_stack(const Addr a) |
| { |
| ThreadId vg_tid; |
| Addr alt_min; |
| SizeT alt_size; |
| |
| vg_tid = VG_(get_running_tid)(); |
| alt_min = VG_(thread_get_altstack_min)(vg_tid); |
| alt_size = VG_(thread_get_altstack_size)(vg_tid); |
| return (SizeT)(a - alt_min) < alt_size; |
| } |
| |
| static |
| void drd_start_using_mem_alt_stack(const Addr a, const SizeT len) |
| { |
| if (!on_alt_stack(a)) |
| drd_start_using_mem_stack(a, len); |
| } |
| |
| static |
| void drd_stop_using_mem_alt_stack(const Addr a, const SizeT len) |
| { |
| if (!on_alt_stack(a)) |
| drd_stop_using_mem_stack(a, len); |
| } |
| |
| /** |
| * Callback function invoked by the Valgrind core before a signal is delivered. |
| */ |
| static |
| void drd_pre_deliver_signal(const ThreadId vg_tid, const Int sigNo, |
| const Bool alt_stack) |
| { |
| DrdThreadId drd_tid; |
| |
| drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); |
| DRD_(thread_set_on_alt_stack)(drd_tid, alt_stack); |
| if (alt_stack) |
| { |
| /* |
| * As soon a signal handler has been invoked on the alternate stack, |
| * switch to stack memory handling functions that can handle the |
| * alternate stack. |
| */ |
| VG_(track_new_mem_stack)(drd_start_using_mem_alt_stack); |
| VG_(track_die_mem_stack)(drd_stop_using_mem_alt_stack); |
| } |
| } |
| |
| /** |
| * Callback function invoked by the Valgrind core after a signal is delivered, |
| * at least if the signal handler did not longjmp(). |
| */ |
| static |
| void drd_post_deliver_signal(const ThreadId vg_tid, const Int sigNo) |
| { |
| DrdThreadId drd_tid; |
| |
| drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); |
| DRD_(thread_set_on_alt_stack)(drd_tid, False); |
| if (DRD_(thread_get_threads_on_alt_stack)() == 0) |
| { |
| VG_(track_new_mem_stack)(drd_start_using_mem_stack); |
| VG_(track_die_mem_stack)(drd_stop_using_mem_stack); |
| } |
| } |
| |
| /** |
| * Callback function called by the Valgrind core before a stack area is |
| * being used by a signal handler. |
| * |
| * @param[in] a Start of address range - VG_STACK_REDZONE_SZB. |
| * @param[in] len Address range length + VG_STACK_REDZONE_SZB. |
| * @param[in] tid Valgrind thread ID for whom the signal frame is being |
| * constructed. |
| */ |
| static void drd_start_using_mem_stack_signal(const Addr a, const SizeT len, |
| ThreadId tid) |
| { |
| DRD_(thread_set_vg_running_tid)(VG_(get_running_tid)()); |
| drd_start_using_mem(a + VG_STACK_REDZONE_SZB, len - VG_STACK_REDZONE_SZB, |
| True); |
| } |
| |
| static void drd_stop_using_mem_stack_signal(Addr a, SizeT len) |
| { |
| drd_stop_using_mem(a + VG_STACK_REDZONE_SZB, len - VG_STACK_REDZONE_SZB, |
| True); |
| } |
| |
| static |
| void drd_pre_thread_create(const ThreadId creator, const ThreadId created) |
| { |
| const DrdThreadId drd_creator = DRD_(VgThreadIdToDrdThreadId)(creator); |
| tl_assert(created != VG_INVALID_THREADID); |
| DRD_(thread_pre_create)(drd_creator, created); |
| if (DRD_(IsValidDrdThreadId)(drd_creator)) |
| { |
| DRD_(thread_new_segment)(drd_creator); |
| } |
| if (DRD_(thread_get_trace_fork_join)()) |
| { |
| DRD_(trace_msg)("drd_pre_thread_create creator = %d, created = %d", |
| drd_creator, created); |
| } |
| } |
| |
| /** |
| * Called by Valgrind's core before any loads or stores are performed on |
| * the context of thread "created". |
| */ |
| static |
| void drd_post_thread_create(const ThreadId vg_created) |
| { |
| DrdThreadId drd_created; |
| Addr stack_max; |
| |
| tl_assert(vg_created != VG_INVALID_THREADID); |
| |
| drd_created = DRD_(thread_post_create)(vg_created); |
| |
| /* Set up red zone before the code in glibc's clone.S is run. */ |
| stack_max = DRD_(thread_get_stack_max)(drd_created); |
| drd_start_using_mem_stack2(drd_created, stack_max, 0); |
| |
| if (DRD_(thread_get_trace_fork_join)()) |
| { |
| DRD_(trace_msg)("drd_post_thread_create created = %d", drd_created); |
| } |
| if (! DRD_(get_check_stack_accesses)()) |
| { |
| DRD_(start_suppression)(DRD_(thread_get_stack_max)(drd_created) |
| - DRD_(thread_get_stack_size)(drd_created), |
| DRD_(thread_get_stack_max)(drd_created), |
| "stack"); |
| } |
| } |
| |
| /* Called after a thread has performed its last memory access. */ |
| static void drd_thread_finished(ThreadId vg_tid) |
| { |
| DrdThreadId drd_tid; |
| |
| /* |
| * Ignore if invoked because thread creation failed. See e.g. |
| * coregrind/m_syswrap/syswrap-amd64-linux.c |
| */ |
| if (VG_(get_running_tid)() != vg_tid) |
| return; |
| |
| drd_tid = DRD_(VgThreadIdToDrdThreadId)(vg_tid); |
| tl_assert(drd_tid != DRD_INVALID_THREADID); |
| if (DRD_(thread_get_trace_fork_join)()) |
| { |
| DRD_(trace_msg)("drd_thread_finished tid = %d%s", drd_tid, |
| DRD_(thread_get_joinable)(drd_tid) |
| ? "" : " (which is a detached thread)"); |
| } |
| if (s_show_stack_usage && !VG_(clo_xml)) { |
| const SizeT stack_size = DRD_(thread_get_stack_size)(drd_tid); |
| const SizeT used_stack |
| = (DRD_(thread_get_stack_max)(drd_tid) |
| - DRD_(thread_get_stack_min_min)(drd_tid)); |
| VG_(message)(Vg_UserMsg, |
| "thread %d%s finished and used %ld bytes out of %ld" |
| " on its stack. Margin: %ld bytes.\n", |
| drd_tid, |
| DRD_(thread_get_joinable)(drd_tid) |
| ? "" : " (which is a detached thread)", |
| used_stack, stack_size, stack_size - used_stack); |
| |
| } |
| drd_stop_using_mem(DRD_(thread_get_stack_min)(drd_tid), |
| DRD_(thread_get_stack_max)(drd_tid) |
| - DRD_(thread_get_stack_min)(drd_tid), |
| True); |
| DRD_(thread_set_record_loads)(drd_tid, False); |
| DRD_(thread_set_record_stores)(drd_tid, False); |
| DRD_(thread_finished)(drd_tid); |
| } |
| |
| /* |
| * Called immediately after fork for the child process only. 'tid' is the |
| * only surviving thread in the child process. Cleans up thread state. |
| * See also http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_atfork.html for a detailed discussion of using fork() in combination with mutexes. |
| */ |
| static |
| void drd__atfork_child(ThreadId tid) |
| { |
| DRD_(drd_thread_atfork_child)(tid); |
| } |
| |
| |
| // |
| // Implementation of the tool interface. |
| // |
| |
| static void DRD_(post_clo_init)(void) |
| { |
| #if defined(VGO_linux) || defined(VGO_darwin) |
| /* fine */ |
| #else |
| VG_(printf)("\nWARNING: DRD has not yet been tested on this operating system.\n\n"); |
| # endif |
| |
| if (s_var_info) |
| { |
| VG_(needs_var_info)(); |
| } |
| } |
| |
| static void drd_start_client_code(const ThreadId tid, const ULong bbs_done) |
| { |
| tl_assert(tid == VG_(get_running_tid)()); |
| DRD_(thread_set_vg_running_tid)(tid); |
| } |
| |
| static void DRD_(fini)(Int exitcode) |
| { |
| // thread_print_all(); |
| if (VG_(clo_verbosity) == 1 && !VG_(clo_xml)) { |
| VG_(message)(Vg_UserMsg, "For counts of detected and suppressed errors, " |
| "rerun with: -v\n"); |
| } |
| |
| if ((VG_(clo_stats) || s_print_stats) && !VG_(clo_xml)) |
| { |
| ULong pu = DRD_(thread_get_update_conflict_set_count)(); |
| ULong pu_seg_cr = DRD_(thread_get_update_conflict_set_new_sg_count)(); |
| ULong pu_mtx_cv = DRD_(thread_get_update_conflict_set_sync_count)(); |
| ULong pu_join = DRD_(thread_get_update_conflict_set_join_count)(); |
| |
| VG_(message)(Vg_UserMsg, |
| " thread: %lld context switches.\n", |
| DRD_(thread_get_context_switch_count)()); |
| VG_(message)(Vg_UserMsg, |
| "confl set: %lld full updates and %lld partial updates;\n", |
| DRD_(thread_get_compute_conflict_set_count)(), |
| pu); |
| VG_(message)(Vg_UserMsg, |
| " %lld partial updates during segment creation,\n", |
| pu_seg_cr); |
| VG_(message)(Vg_UserMsg, |
| " %lld because of mutex/sema/cond.var. operations,\n", |
| pu_mtx_cv); |
| VG_(message)(Vg_UserMsg, |
| " %lld because of barrier/rwlock operations and\n", |
| pu - pu_seg_cr - pu_mtx_cv - pu_join); |
| VG_(message)(Vg_UserMsg, |
| " %lld partial updates because of thread join" |
| " operations.\n", |
| pu_join); |
| VG_(message)(Vg_UserMsg, |
| " segments: created %lld segments, max %lld alive,\n", |
| DRD_(sg_get_segments_created_count)(), |
| DRD_(sg_get_max_segments_alive_count)()); |
| VG_(message)(Vg_UserMsg, |
| " %lld discard points and %lld merges.\n", |
| DRD_(thread_get_discard_ordered_segments_count)(), |
| DRD_(sg_get_segment_merge_count)()); |
| VG_(message)(Vg_UserMsg, |
| "segmnt cr: %lld mutex, %lld rwlock, %lld semaphore and" |
| " %lld barrier.\n", |
| DRD_(get_mutex_segment_creation_count)(), |
| DRD_(get_rwlock_segment_creation_count)(), |
| DRD_(get_semaphore_segment_creation_count)(), |
| DRD_(get_barrier_segment_creation_count)()); |
| VG_(message)(Vg_UserMsg, |
| " bitmaps: %lld level one" |
| " and %lld level two bitmaps were allocated.\n", |
| DRD_(bm_get_bitmap_creation_count)(), |
| DRD_(bm_get_bitmap2_creation_count)()); |
| VG_(message)(Vg_UserMsg, |
| " mutex: %lld non-recursive lock/unlock events.\n", |
| DRD_(get_mutex_lock_count)()); |
| DRD_(print_malloc_stats)(); |
| } |
| |
| DRD_(bm_module_cleanup)(); |
| } |
| |
| static |
| void drd_pre_clo_init(void) |
| { |
| // Basic tool stuff. |
| VG_(details_name) ("drd"); |
| VG_(details_version) (NULL); |
| VG_(details_description) ("a thread error detector"); |
| VG_(details_copyright_author)("Copyright (C) 2006-2013, and GNU GPL'd," |
| " by Bart Van Assche."); |
| VG_(details_bug_reports_to) (VG_BUGS_TO); |
| |
| VG_(basic_tool_funcs) (DRD_(post_clo_init), |
| DRD_(instrument), |
| DRD_(fini)); |
| |
| // Command line stuff. |
| VG_(needs_command_line_options)(DRD_(process_cmd_line_option), |
| DRD_(print_usage), |
| DRD_(print_debug_usage)); |
| VG_(needs_xml_output) (); |
| |
| // Error handling. |
| DRD_(register_error_handlers)(); |
| |
| // Core event tracking. |
| VG_(track_pre_mem_read) (drd_pre_mem_read); |
| VG_(track_pre_mem_read_asciiz) (drd_pre_mem_read_asciiz); |
| VG_(track_post_mem_write) (drd_post_mem_write); |
| VG_(track_new_mem_brk) (drd_start_using_mem_w_tid); |
| VG_(track_new_mem_mmap) (drd_start_using_mem_w_perms); |
| VG_(track_new_mem_stack) (drd_start_using_mem_stack); |
| VG_(track_new_mem_stack_signal) (drd_start_using_mem_stack_signal); |
| VG_(track_new_mem_startup) (drd_start_using_mem_w_perms); |
| VG_(track_die_mem_brk) (drd_stop_using_nonstack_mem); |
| VG_(track_die_mem_munmap) (drd_stop_using_nonstack_mem); |
| VG_(track_die_mem_stack) (drd_stop_using_mem_stack); |
| VG_(track_die_mem_stack_signal) (drd_stop_using_mem_stack_signal); |
| VG_(track_pre_deliver_signal) (drd_pre_deliver_signal); |
| VG_(track_post_deliver_signal) (drd_post_deliver_signal); |
| VG_(track_start_client_code) (drd_start_client_code); |
| VG_(track_pre_thread_ll_create) (drd_pre_thread_create); |
| VG_(track_pre_thread_first_insn)(drd_post_thread_create); |
| VG_(track_pre_thread_ll_exit) (drd_thread_finished); |
| VG_(atfork) (NULL/*pre*/, NULL/*parent*/, |
| drd__atfork_child/*child*/); |
| |
| // Other stuff. |
| DRD_(register_malloc_wrappers)(drd_start_using_mem_w_ecu, |
| drd_stop_using_nonstack_mem); |
| |
| DRD_(bm_module_init)(); |
| |
| DRD_(clientreq_init)(); |
| |
| DRD_(suppression_init)(); |
| |
| DRD_(clientobj_init)(); |
| |
| DRD_(thread_init)(); |
| |
| { |
| HChar* const smi = VG_(getenv)("DRD_SEGMENT_MERGING_INTERVAL"); |
| if (smi) |
| DRD_(thread_set_segment_merge_interval)(VG_(strtoll10)(smi, NULL)); |
| } |
| |
| if (VG_(getenv)("DRD_VERIFY_CONFLICT_SET")) |
| DRD_(verify_conflict_set) = True; |
| |
| } |
| |
| |
| VG_DETERMINE_INTERFACE_VERSION(drd_pre_clo_init) |
