<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">There is UNSAFE code, few LOOPHOLEs, nothing much, and I am not loopholing anything untraced over. And yes, this is x86_32, some old dual Xeon machine.<div><br></div><div>If it happens again, I will definitely try @M3paranoidgc.</div><div><br></div><div>While here.. What are prospects of Atomic ops? </div><div><br></div><div>TIA,</div><div>dd<br><div><div><br><div><div>On 23 Nov 2013, at 20:33, Antony Hosking <<a href="mailto:hosking@purdue.edu">hosking@purdue.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>These issues are best diagnosed by running with @M3paranoidgc. That will perform extensive checking of heap integrity after each GC cycle. It would appear that some sort of heap corruption has occurred. Does your application have much unsafe code? Unfortunately, UNSAFE code can arbitrarily confuse the GC.</div><div><br></div><div>Also, what platform is this on? x86_64 or x86_32? Looks like LINUXLIBC6 which I believe is still x86_32.</div><br><div><div>On Nov 23, 2013, at 12:06 PM, Dragiša Durić <<a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Ok.. Now I am at HEAD, literraly:<div><br></div><div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">***</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">*** runtime error:</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">*** An array subscript was out of range.</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">*** file "../src/runtime/common/RTCollector.m3", line 418</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">***</div></div><div><br></div><div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#32 0x003dbe44 in _m3_fault (M3_AcxOUs_arg=<error reading variable>) from /usr/local/cm3/bin/../lib/libm3core.so.5</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#33 0x003d3807 in RTCollector__Move (M3_BVudqN_self=<error reading variable>, M3_AJWxb1_cp=<error reading variable>)</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> at ../src/runtime/common/RTCollector.m3:418</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#34 0x003cfb86 in RTHeapMap__Walk (M3_AJWxb1_x=<error reading variable>, M3_AJWxb1_pc=<error reading variable>, M3_Deq2V9_v=<error reading variable>)</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> at ../src/runtime/common/RTHeapMap.m3:202</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#35 0x003cf471 in RTHeapMap__DoWalkRef (M3_Eic7CK_t=<error reading variable>, M3_AJWxb1_a=<error reading variable>, M3_Deq2V9_v=<error reading variable>)</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> at ../src/runtime/common/RTHeapMap.m3:62</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#36 0x003cf448 in RTHeapMap__DoWalkRef (M3_Eic7CK_t=<error reading variable>, M3_AJWxb1_a=<error reading variable>, M3_Deq2V9_v=<error reading variable>)</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> at ../src/runtime/common/RTHeapMap.m3:57</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#37 0x003cf3ee in RTHeapMap__WalkRef (M3_Edk2y1_h=<error reading variable>, M3_Deq2V9_v=<error reading variable>) at ../src/runtime/common/RTHeapMap.m3:47</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#38 0x003d58b6 in RTCollector__CleanBetween (M3_Edk2y1_h=<error reading variable>, M3_Edk2y1_he=<error reading variable>, </div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> M3_AicXUJ_clean=<error reading variable>) at ../src/runtime/common/RTCollector.m3:1091</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#39 0x003d56d7 in RTCollector__CleanPage (M3_BtgLOI_page=<error reading variable>) at ../src/runtime/common/RTCollector.m3:1064</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#40 0x003d4ed2 in RTCollector__CollectSomeInStateZero () at ../src/runtime/common/RTCollector.m3:885</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#41 0x003d476a in RTCollector__CollectSome () at ../src/runtime/common/RTCollector.m3:720</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#42 0x003d444a in RTHeapRep__CollectEnough () at ../src/runtime/common/RTCollector.m3:654</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#43 0x003cd245 in RTAllocator__AllocTraced (M3_Cwb5VA_dataSize=<error reading variable>, M3_Cwb5VA_dataAlignment=<error reading variable>, </div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> M3_B1GO5V_thread=<error reading variable>) at ../src/runtime/common/RTAllocator.m3:367</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#44 0x003cc3cc in RTAllocator__GetTracedRef (M3_Eic7CK_def=<error reading variable>) at ../src/runtime/common/RTAllocator.m3:202</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#45 0x003cc027 in RTHooks__AllocateTracedRef (M3_AJWxb1_defn=<error reading variable>) at ../src/runtime/common/RTAllocator.m3:115</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#46 0x002fcb05 in IntRefTbl__Put (M3_C1DLtw_tbl=<error reading variable>, M3_EN2A1V_key=<error reading variable>, M3_EKuYlT_val=<error reading variable>)</div><div style="margin: 0px; font-size: 13px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;"> at ../LINUXLIBC6/IntRefTbl.m3 => ../src/table/Table.mg:126</div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; font-family: Candara; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">On 17 Nov 2013, at 22:45, Dragiša Durić <<a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a>> wrote:</div></span></div></span></span></div><div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Good. I will try same cases with more recent one ASAP.<br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; font-family: Candara; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">--</div></span></div></span><span class="Apple-style-span" style="font-family: Helvetica; ">Dragiša Durić</span><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a></div><div><br></div></div></span></div></span></span><br class="Apple-interchange-newline">
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<br><div><div>On 17 Nov 2013, at 21:40, Antony Hosking <<a href="mailto:hosking@purdue.edu">hosking@purdue.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I know 5.8.6 had problems.<div><br><div><div>On Nov 17, 2013, at 2:49 PM, Dragiša Durić <<a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">This is 5.8.6 codebase, so it’s maybe solved in later codebase… I have few threads, one has this on top of stack<div><br></div><div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#0 0x00130416 in __kernel_vsyscall ()</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#1 0x00ca6019 in __lll_lock_wait () from /lib/libpthread.so.0</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#2 0x00ca1430 in _L_lock_677 () from /lib/libpthread.so.0</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#3 0x00ca1301 in pthread_mutex_lock () from /lib/libpthread.so.0</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#4 0x00428aa1 in ThreadPThread__pthread_mutex_lock (m=0xc6e430) at ../src/thread/PTHREAD/ThreadPThreadC.c:557</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#5 0x00427d67 in RTOS__LockHeap () at ../src/thread/PTHREAD/ThreadPThread.m3:1434</div><div><br></div><div>another:</div><div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#0 0x00130416 in __kernel_vsyscall ()</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#1 0x00ca6c66 in nanosleep () from /lib/libpthread.so.0</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#2 0x00428941 in ThreadPThread__Nanosleep (req=0xb6c30d88, rem=0xb6c30d90) at ../src/thread/PTHREAD/ThreadPThreadC.c:500</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#3 0x00424f02 in ThreadPThread__CommonSleep () at ../src/thread/c:551</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#4 0x00426cc9 in ThreadPThread__StopWorld () at ../src/thread/PTHREAD/ThreadPThread.m3:1086</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#5 0x004260c3 in RTThread__SuspendOthers () at ../src/thread/PTHREAD/ThreadPThread.m3:812</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#6 0x00408cd6 in RTCollector__CollectSomeInStateZero () at ../src/runtime/common/RTCollector.m3:746</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#7 0x00408c95 in RTCollector__CollectSome () at ../src/runtime/common/RTCollector.m3:720</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#8 0x00408748 in RTHeapRep__CollectEnough () at ../src/runtime/common/RTCollector.m3:654</div></div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; font-family: Candara; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">and others:</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#0 0x00130416 in __kernel_vsyscall ()</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#1 0x00cdeede in sigsuspend () from /lib/libc.so.6</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#2 0x0042836e in ThreadPThread__sigsuspend () at ../src/thread/PTHREAD/ThreadPThreadC.c:141</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);">#3 0x004271f6 in ThreadPThread__SignalHandler (M3_DLS2Hj_sig=<error reading variable>, M3_AJWxb1_info=<error reading variable>, M3_AJWxb1_context=<error reading variable>)</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);"> at ../src/thread/PTHREAD/ThreadPThread.m3:1205</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#4 <signal handler called></div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#5 0x00130416 in __kernel_vsyscall ()</div><div style="margin: 0px; font-size: 12px; font-family: Monaco; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0); position: static; z-index: auto;">#6 0x00ca3664 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0</div></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Am I reading this correctly? Thread waiting for lock “refuses” to be suspended?</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">--</div></span></div></span><span class="Apple-style-span" style="font-family: Helvetica;">Dragiša Durić</span><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><a href="mailto:dragisha@m3w.org">dragisha@m3w.org</a></div><div><br></div></div></span></div></span></span><br class="Apple-interchange-newline">
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