I run a server in ESP8266 which accept argument and value when you click the submit button in the webpage. after some iteration of clicking the submit button, the esp8266 crashes with the Exception of:
--------------- CUT HERE FOR EXCEPTION DECODER ---------------
Exception (29):
epc1=0x40205224 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000
>>>stack>>>
ctx: cont
sp: 3ffffca0 end: 3fffffc0 offset: 0190
3ffffe30: 3fff1598 3fff1598 3ffffe80 4020521f
3ffffe40: 3fff6354 3ffffe98 3ffffe80 40217ef0
3ffffe50: 00000003 3ffffec0 3ffffe80 40217f20
3ffffe60: 3ffffe98 3ffffea4 3fff1588 3fff0da4
3ffffe70: 00000000 3ffffec0 00000005 402053a9
3ffffe80: 3fff631c 0029002f 00003a30 3fff6300
3ffffe90: 0029002f 800001da 3fff6354 0029002f
3ffffea0: 00000001 3fffbf5c 0005002f 00217d42
3ffffeb0: 00000001 3fff0dac 3ffffefc 4020cb24
3ffffec0: 3fff68b4 01da01df 00000000 fffffffe
3ffffed0: 00000000 3fffc6fc 00000000 3fff1c88
3ffffee0: 00000000 3fffdad0 40223278 00000000
3ffffef0: 3ffffefc 3fffff64 3fff0a00 40223428
3fffff00: 00000000 000003e8 3fffff60 03e87701
3fffff10: 402583d1 00000004 3fff0d58 4020171a
3fffff20: 40258677 00000004 3fff0d58 3fff0d5c
3fffff30: 00000000 4bc6a7f0 0189374b 00000000
3fffff40: 00000000 00000000 4bc6a7f0 00000000
3fffff50: 000e001a 00050008 4010051c 0001fc51
3fffff60: 00000000 6c80e048 4024c800 3ffe8514
3fffff70: 024bbda9 80000000 00000000 4010059d
3fffff80: 00000000 00000000 00000001 3fff1cc8
3fffff90: 3fffdad0 00000000 0001fc51 40211f35
3fffffa0: 3fffdad0 00000000 3fff1c88 40218fd4
3fffffb0: feefeffe feefeffe 3ffe899c 40100f45
<<<stack<<<
last failed alloc call: 4020521F(100)
--------------- CUT HERE FOR EXCEPTION DECODER ---------------
ets Jan 8 2013,rst cause:2, boot mode:(3,6)
For debugging: Free Heap is printed(runs every 2 seconds using millis) in the serial monitor by
Serial.println(ESP.getFreeHeap());
The submit button is sending the following argument and value(Partial only) :
http://192.168.4.1?user=1234&password=1234&data1=qwertyuiopasdfghjklzxcvbnm&data1=qwertyuiopasdfghjklzxcvbnm&data2=qwertyuiopasdfghjklzxcvbnm&data3=qwertyuiopasdfghjklzxcvbnm&data4=qwertyuiopasdfghjklzxcvbnm
as you can see the FreeHeap is going down until it reaches the minimum where ESP8266 can't handle.
Is there a way to refresh or reuse the heap without rebooting the Chip?
Is safeString can help to this problem ?
Related
I am learning about bit wise operators and ran into this problem:
In computer graphics, colors are often stores as three numbers,
representing red, green and blue intensities. Suppose that each number requires eight bits, and we'd like to store all three values in a single long integer.
Write a macro named MK_COLOR with three parameters (the red, green and blue intensities). MK_COLOR should return a long in which
the last three bytes contain the red, green and blue intensities, with the red value as the last byte and the green value as the next-to-last byte.
The solution is:
#define MK_COLOR(r,g,b) ((long) (b) << 16 | (g) << 8 | (r))
I don't fully understand how the solution works, so I will try to break down my understanding, lets say r = 20 (10100), g = 30 (11110) and b = 40 (101000).
b is shifted left by 16 bits so we get 00010100 00000000 00000000
g is shifted by 8 bits so we get 11110000
there is a | OR operator which looks like this:
00010100 00000000 00000000
| 11110000 00000000 00000000
---------------------------
11110100 00000000 00000000
the last step does OR on this result we got but with r which looks like this:
11110100 00000000 00000000
| 10100000 00000000 00000000
---------------------------
11110100 00000000 00000000 // result
The result is 11110100 00000000 00000000 which is 15990784 in decimal. This result however is incorrect according to when I run the program and get 2629140 as the answer.
Why is it wrong? Could you please explain what I did wrong and how I can better my understanding of this?
You have mistake in your shift results. Let's break it up:
r = 20 = 0b00010100
g = 30 = 0b00011110
b = 40 = 0b00101000
(long)(b) << 16 = 0b 00101000 00000000 00000000
(long)(g) << 8 = 0b 00000000 00011110 00000000
(long)(r) = 0b 00000000 00000000 00010100
-------------------------------------------
Ored Result = 0b 00101000 00011110 00010100 = 2629140
You're unintentionally doing some extra shifts.
You start with:
r = 00010100
g = 00011110
b = 00101000
Then:
b << 16 = 00101000 00000000 00000000
g << 8 = 00011110 00000000 (you had initially shifted left by only 3)
Then you OR them all together:
00101000 00000000 00000000
00000000 00011110 00000000
| 00000000 00000000 00010100
----------------------------
00101000 00011110 00010100
The mistake you made was you added zeros on the left, essentially performing an additional shift an changing the values.
I'm a newbie in Linux driver Field.Now, I has just done with writing Linux driver and I'm testing the accuracy of the function of this driver. The goal of my driver is using FPGA card with CPU ARMv7 through PCIe communication and doing both encryption and decryption in this card. When I test my kernel module, I see this kernel panic. In my test case, I send multiple packets continuously to FPGA card to implement encryption/decryption. However, after doing several packets well, Linux kernel was crash. At first, I think that this kernel crash bug is related to allocating kernel memory and freeing this memory (kzalloc function and kfree function). May be memory allocated for some pointer does not be freed immediately. Can anyone suggests the cause and the solution for this kernel panic?
[ 532.593938] Unable to handle kernel NULL pointer dereference at virtual address 00000001
[ 532.602069] pgd = ecb8c000
[ 532.604780] [00000001] *pgd=2ca83831, *pte=00000000, *ppte=00000000
[532.611066] Internal error: Oops: 17 [#1] SMP ARM
[ 532.615777] Modules linked in: testcrypto(+) huy_crypto xdma ath9k ath9k_common pppoe ppp_async ath9k_hw ath10k_pci ath10k_core ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_policy xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_esp xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache iptable_raw iptable_mangle iptable_filter ipt_ah ipt_ECN ip_tables crc_ccitt compat sch_cake
[ 532.686456] act_connmark nf_conntrack sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_tcindex cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred cryptodev nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 ifb ip6_vti ip_vti xfrm6_mode_tunnel xfrm6_mode_transport xfrm6_mode_beet ipcomp6 xfrm6_tunnel esp6 ah6 xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet ipcomp esp4 ah4 ip6_tunnel tunnel6 tunnel4 ip_tunnel mpls_iptunnel mpls_router mpls_gso xfrm_user xfrm_ipcomp af_key xfrm_algo algif_skcipher algif_hash af_alg sha512_generic md5 echainiv cbc authenc gpio_button_hotplug [last unloaded: testcrypto]
[ 532.748684] CPU: 0 PID: 5563 Comm: insmod Not tainted 4.14.176 #0
[ 532.754789] Hardware name: Marvell Armada 380/385 (Device Tree)
[ 532.760721] task: ef3bde00 task.stack: ef182000
[ 532.765263] PC is at __kmalloc_track_caller+0x100/0x144
[ 532.770499] LR is at 0x89a5
[ 532.773297] pc : [<c01ee8b4>] lr : [<000089a5>] psr: 20000013
[ 532.779576] sp : ef183d98 ip : a0000013 fp : ffffee4b
[ 532.784811] r10: 00000009 r9 : 00008124 r8 : 00000002
[ 532.790046] r7 : 00000001 r6 : ecfe2a40 r5 : 014000c0 r4 : ef001e40
[ 532.796586] r3 : 00000000 r2 : ef7d6a34 r1 : 2ee8d000 r0 : 000089a6
[ 532.803128] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 532.810278] Control: 10c5387d Table: 2cb8c04a DAC: 00000051
[ 532.816035] Process insmod (pid: 5563, stack limit = 0xef182210)
[ 532.822054] Stack: (0xef183d98 to 0xef184000)
[ 532.826419] 3d80: 00000008 c024eb40
[ 532.834616] 3da0: ecfe24c0 00000124 00000002 c01c73b8 ec94b540 ef0181c0 ec94b540 c024eb40
[ 532.842812] 3dc0: 00000000 00000124 bf6780c8 ec94b540 c07088c8 ec94b540 00000124 bf6780c8
[ 532.851008] 3de0: 00000000 c024fcc8 00000000 c07088c8 ec94b540 c025173c 00000000 edfed95c
[ 532.859204] 3e00: ec94b540 c025207c 00001000 00000000 c07088c8 edfed95c 00000000 00000000
[ 532.867401] 3e20: edfed800 edfeda58 ec94b540 c0252a5c 00000000 00000000 c07e21ec c07e21d8
[ 532.875597] 3e40: 00000008 ef183f40 edfed800 edfeda34 edfeda70 0000002c 014000c0 bf678080
[ 532.883793] 3e60: c0a03c48 c0193a30 bf67808c 00007fff bf678080 c0191330 c0a5dce8 bf6780c8
[ 532.891990] 3e80: c0190a50 bf67808c c0702ce4 bf678170 c082dfd8 c07da244 c07da3a0 c0a03c48
[ 532.900186] 3ea0: c07da250 f1523fff ffe00000 ef0e8600 fffff000 c0a5dcc0 014002c0 00000011
[ 532.908382] 3ec0: 00000000 00000000 00000000 00000000 00000000 00000000 6e72656b 00006c65
[ 532.916578] 3ee0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 532.924774] 3f00: 00000000 00000000 00000000 00000000 00000000 c9929c40 00000080 00000fe4
[ 532.932970] 3f20: 00000000 00642ff4 f1523fe4 ffffe000 b6f74230 00000051 00000000 c0194110
[ 532.941166] 3f40: f1515bcc f1513000 00010fe4 f1523904 f1523748 f151f760 00004000 00004080
[ 532.949362] 3f60: 00000000 00000000 00000000 000036d0 00000029 0000002a 00000017 00000000
[ 532.957558] 3f80: 00000012 00000000 00000000 00000000 00000003 00000080 c01077a4 ef182000
[ 532.965755] 3fa0: 00000080 c01075a0 00000000 00000000 00632010 00010fe4 b6f74230 00000700
[ 532.973951] 3fc0: 00000000 00000000 00000003 00000080 00010fe4 00000000 00000020 00000000
[ 532.982148] 3fe0: beca6d1c beca6d00 00011d50 b6f2abac 60000010 00632010 00000000 00000000
[ 532.990350] [<c01ee8b4>] (__kmalloc_track_caller) from [<c01c73b8>] (kstrdup+0x30/0x54)
[ 532.998378] [<c01c73b8>] (kstrdup) from [<c024eb40>] (__kernfs_new_node+0x28/0x130)
[ 533.006055] [<c024eb40>] (__kernfs_new_node) from [<c024fcc8>] (kernfs_new_node+0x1c/0x38)
[ 533.014340] [<c024fcc8>] (kernfs_new_node) from [<c025173c>] (__kernfs_create_file+0x18/0xa4)
[ 533.022885] [<c025173c>] (__kernfs_create_file) from [<c025207c>] (sysfs_add_file_mode_ns+0x13c/0x194)
[ 533.032213] [<c025207c>] (sysfs_add_file_mode_ns) from [<c0252a5c>] (internal_create_group+0x194/0x2e8)
[ 533.041630] [<c0252a5c>] (internal_create_group) from [<c0193a30>] (load_module+0x1b74/0x2118)
[ 533.050262] [<c0193a30>] (load_module) from [<c0194110>] (SyS_init_module+0x13c/0x174)
[ 533.058201] [<c0194110>] (SyS_init_module) from [<c01075a0>] (ret_fast_syscall+0x0/0x54)
[ 533.066312] Code: ea00000f e121f00c eaffffd2 e5943014 (e7973003)
[ 533.072445] ---[ end trace bb93ca4b64a48f93 ]---
[ 533.079218] Kernel panic - not syncing: Fatal exception
[ 533.084457] CPU1: stopping
[ 533.087173] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 4.14.176 #0
[ 533.094497] Hardware name: Marvell Armada 380/385 (Device Tree)
[ 533.100436] [<c010ecf8>] (unwind_backtrace) from [<c010a9b0>] (show_stack+0x10/0x14)
[ 533.108202] [<c010a9b0>] (show_stack) from [<c0636974>] (dump_stack+0x94/0xa8)
[ 533.115442] [<c0636974>] (dump_stack) from [<c010db38>] (handle_IPI+0xe4/0x190)
[ 533.122769] [<c010db38>] (handle_IPI) from [<c0101494>] (gic_handle_irq+0x8c/0x90)
[ 533.130357] [<c0101494>] (gic_handle_irq) from [<c010b64c>] (__irq_svc+0x6c/0x90)
[ 533.137855] Exception stack(0xef067f80 to 0xef067fc8)
[ 533.142919] 7f80: 00000001 00000000 00000000 c01145a0 ffffe000 c0a03cb8 c0a03c6c 00000000
[ 533.151115] 7fa0: 00000000 414fc091 00000000 00000000 ef067fc8 ef067fd0 c0107f68 c0107f6c
[ 533.159309] 7fc0: 60000013 ffffffff
[ 533.162807] [<c010b64c>] (__irq_svc) from [<c0107f6c>] (arch_cpu_idle+0x34/0x38)
[ 533.170224] [<c0107f6c>] (arch_cpu_idle) from [<c015f6d4>] (do_idle+0xdc/0x19c)
[ 533.177551] [<c015f6d4>] (do_idle) from [<c015f9f0>] (cpu_startup_entry+0x18/0x1c)
[ 533.185139] [<c015f9f0>] (cpu_startup_entry) from [<0010182c>] (0x10182c)
[ 533.193813] Rebooting in 3 seconds..
(Updated)
Moreover, the kernel has been crashed after several packets processed. In the log, I see some bug information related to Insmod function. Here is my code in the Init function module: ( In my Init function, I implement encryption/decryption with one packet request many times by using a loop for and module_param value. )
static int __init test_init(void)
{
for (i = 0; i < req_num; i ++)
{
if (cipher_choice == 3)
{
test_esp_rfc4106(test_choice,endec);
mdelay(1000);
pr_err("--------------------------%d-------------------:
%s - PID:%d\n",__LINE__ , __func__ , current->pid);
pr_err("------------------------Number of req-----------
--------: %d\n",i);
}
}
return 0;
}
You can tell from the log that this happened right at soon as the module was loaded (well, during loading) because insmod is still running. It was creating an entry in '/sys'. This gives you some idea what may have been happening before the crash.
Since the crash is inside kstrdup/kmalloc and not directly related to your code, the most likely cause is either a double free or a buffer overflow in your module's code. Since it was soon after loading the module, probably the problem is in your module's init. No one is going to be able to tell you exactly what went wrong because you didn't post any code.
My app was retargeted from WP8.0 to WP Silverlight 8.1. Everything runs well no matter Debug/Release mode when I deployed from Visual Studio 2013 to WP8.1 Device. However, when I packed into xap format file and deployed by MS Deployment Tool, the app crash immediately after clicking even no slashscreen.
No too many document found about this on Internet. I am stunked here since 2 weeks. Hope any WP expert could do me a favor, please. Belows is WPA's analysing result of crash dump file if it could help :
**Exception Analysis Result**
SYMSRV: C:\SymCache\KERNELBASE.dll\54742BACbc000\KERNELBASE.dll not found
SYMSRV: C:\SymCache\KERNELBASE.dll\54742BACbc000\KERNELBASE.dll not found
SYMSRV: http://msdl.microsoft.com/download/symbols/KERNELBASE.dll/54742BACbc000/KERNELBASE.dll not found
SYMSRV: http://msdl.microsoft.com/download/symbols/KERNELBASE.dll/54742BACbc000/KERNELBASE.dll not found
FAULTING_IP:
KERNELBASE!RaiseException+37
777c35d6 b015 add sp,sp,#0x54
EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 777c35d7 (KERNELBASE!RaiseException+0x00000037)
ExceptionCode: e0464645
ExceptionFlags: 00000001
NumberParameters: 1
Parameter[0]: 88000837
CONTEXT: 00000000 -- (.cxr 0x0;r)
r0=000005f4 r1=00020000 r2=0141eb60 r3=00000000 r4=778c2451 r5=00000000
r6=00020000 r7=0141ea48 r8=00000568 r9=0141eb60 r10=0141eb60 r11=0141eb10
r12=00000087 sp=0141ea18 lr=761d40e7 pc=778c2456 psr=00000030 ----- Thumb
ntdll!NtAlpcSendWaitReceivePort+0x6:
778c2456 4770 bx lr {errorhandlingext!CheckForReadOnlyResourceFilter+0x2fa (761d40e6)}
DEFAULT_BUCKET_ID: WRONG_SYMBOLS
PROCESS_NAME: aghost.exe
ERROR_CODE: (NTSTATUS) 0xe0464645 - <Unable to get error code text>
EXCEPTION_CODE: (NTSTATUS) 0xe0464645 - <Unable to get error code text>
EXCEPTION_PARAMETER1: 88000837
NTGLOBALFLAG: 0
APPLICATION_VERIFIER_FLAGS: 0
APP: aghost.exe
ANALYSIS_VERSION: 6.3.9600.17237 (debuggers(dbg).140716-0327) amd64fre
MANAGED_STACK: !dumpstack -EE
No export dumpstack found
MANAGED_BITNESS_MISMATCH:
Managed code needs matching platform of sos.dll for proper analysis. Use 'arm or x86' debugger.
PRIMARY_PROBLEM_CLASS: WRONG_SYMBOLS
BUGCHECK_STR: APPLICATION_FAULT_WRONG_SYMBOLS
LAST_CONTROL_TRANSFER: from 6e42fa46 to 777c35d6
STACK_TEXT:
0141fa68 6e42fa46 : e0464645 00000001 00000000 777c35d7 : KERNELBASE!RaiseException+0x36
0141fac8 6e440410 : 00000001 00000002 04fc4f98 00c83380 : npctrl!CXcpControl::CPReportError+0x66
0141faf8 6e41608e : 00c83380 00c83290 0141fb28 6e41608f : npctrl!CXcpControl::ReportError+0x10
0141fb08 6e411726 : 04fc4f98 00c83290 00000000 00000401 : npctrl!CXcpDispatcher::OnError+0xc2
0141fb30 6e3fe396 : 00000000 00000401 00000000 00c83290 : npctrl!CXcpDispatcher::OnWindowMessage+0x1275e
0141fb50 76669ce6 : 00c74858 7fd7b000 00c74858 00c603c8 : npctrl!CXcpDispatcher::GroupDispatchProcStatic+0x11e
0141fb80 76669d1e : 8000ffff 00c603c8 6e3fe279 0141fc90 : CoreMessaging!CoreUIConfigureTestHost+0x14aca
0141fbb8 7666672e : 0187bd20 766638d5 0141fc30 7666672f : CoreMessaging!CoreUIConfigureTestHost+0x14b02
0141fbc8 7666a346 : 00000000 00000000 00000000 7666a593 : CoreMessaging!CoreUIConfigureTestHost+0x11512
0141fc38 7666b322 : 0187b118 766ac010 0141fcc8 76664ca3 : CoreMessaging!CoreUIConfigureTestHost+0x1512a
0141fc70 766f396c : 00c38db0 0187b118 00000000 00000000 : CoreMessaging!CoreUIConfigureTestHost+0x16106
0141fcd0 766f3808 : 00000000 00000000 8000ffff 00c49740 : minuser!Core::Yield::IMessageLoopExtensions_Run+0x124
0141fd18 766e74b4 : fffffffe fffffffe 00bf0d40 00bf21d0 : minuser!Core::CoreUIAdapter::DispatchEvents+0x90
0141fd40 69ad81ac : 00000000 0141fdc0 00000000 777731c0 : minuser!minPeekMessageW+0x318
0141fdb0 69ad80c2 : 00000001 00000006 0141fe00 00000001 : windows_ui!Windows::UI::Core::CDispatcher::WaitAndProcessMessages+0xdc
0141fe58 00a324ee : 155bf757 00000002 00000001 00c38000 : windows_ui!Windows::UI::Core::CDispatcher::ProcessEvents+0x62
0141fec0 757a24ca : 00c58c08 00c49288 0141fed8 757a24cb : aghost+0x24ee
0141fed0 757a239a : 757a24a5 757d600c 0141ff08 757a239b : twinapi_appcore!Windows::ApplicationModel::Core::CoreApplicationView::Run+0x26
0141fee0 75fdff88 : 0141fef0 00c37fe0 00c325f0 00c37fe0 : twinapi_appcore!CWrlLightweightHandlerBase::ReleaseMarshalData+0x11a
0141ff10 77906426 : 00000000 00b3f740 00000000 00000000 : shcore!SHCreateThreadRef+0x200
0141ffa0 00000000 : 00000000 77906411 00000000 00000000 : ntdll!RtlUserThreadStart+0x16
STACK_COMMAND: ~4s; .ecxr ; kb
FOLLOWUP_IP:
npctrl!CXcpControl::CPReportError+66
6e42fa46 9b02 ldr r3,[sp,#8]
SYMBOL_STACK_INDEX: 1
SYMBOL_NAME: npctrl!CXcpControl::CPReportError+66
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: npctrl
IMAGE_NAME: npctrl.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 0
FAILURE_BUCKET_ID: WRONG_SYMBOLS_e0464645_npctrl.dll!CXcpControl::CPReportError
BUCKET_ID: ARM_APPLICATION_FAULT_WRONG_SYMBOLS_npctrl!CXcpControl::CPReportError+66
ANALYSIS_SOURCE: UM
FAILURE_ID_HASH_STRING: um:wrong_symbols_e0464645_npctrl.dll!cxcpcontrol::cpreporterror
FAILURE_ID_HASH: {e963f9cc-8423-eaea-1bb2-e08acc6d433a}
The Deadlock occurs in my application when initialization of local static variable happens in the function called from DLLMain Entry point with param DLL_THREAD_DETACH.
Below is Windbg analysis
This is usually caused by another thread holding the loader lock.
Following are the Locks Held.
CritSec ntdll!LdrpLoaderLock+0 at 7c97e178
LockCount 3
RecursionCount 1
OwningThread 17e8
EntryCount d
ContentionCount d
*** Locked
CritSec MSVCR80!__app_type+94 at 781c3bc8
LockCount 1
RecursionCount 1
OwningThread 1100
EntryCount 1
ContentionCount 1
*** Locked
#
Call stack Thread 17e8
781c3bc8 78132bd9 0777fde4 ntdll!RtlEnterCriticalSection+0x46
00000008 b87d2630 00000000 MSVCR80!_lock+0x2e
0864ae10 08631d7f 0864ae10 EPComUtilities32!_onexit+0x36
0864ae10 b87d2588 00000001 EPComUtilities32!atexit+0x9
0777fea8 0864719f 08630000 EPComUtilities32!XCriticalSectionEx::ThreadTerminated+0x5f
08630000 00000003 00000000 EPComUtilities32!DllMain+0x20
08630000 7c90118a 08630000 EPComUtilities32!__DllMainCRTStartup+0x7a
08630000 00000003 00000000 EPComUtilities32!_DllMainCRTStartup+0x1d
#
Call Stack thread 1100
000000b0 00000000 00000000 ntdll!ZwWaitForSingleObject+0xc
000000b0 ffffffff 00000000 kernel32!WaitForSingleObjectEx+0xa8
000000b0 ffffffff 06ce64e0 kernel32!WaitForSingleObject+0x12
000480ba 000f4240 00000000 CATSysMultiThreading!CATThreads::Join+0xf5
0012fcc8 00000004 00000000 JS0GROUP!CATLM::StopHB+0xf4
d138509f 00416694 00000001 JS0GROUP!CATLM::Unmake+0x6b
00000000 00000000 00000000 MSVCR80!_cinit+0xd6
00000000 0012fd6c 081e68d9 MSVCR80!exit+0xd
00000000 06d404f0 0998fb90 JS0GROUP!CATExit+0x1d
00000000 004ef366 0000000d DNBPLMProvider!DNBEPLMTransactionMgt::OnApplicationExit+0x229
00000000 0012fd9c 004eabfc JS0GROUP!CATCallExits+0x2bc
00000000 0012ff7c 0040cefd JS0GROUP!CATErrorNormalEnd+0x31
00000000 06ce71d0 06ce71d0 JS0GROUP!CATExit+0xc
00000007 06cdb120 059b61d8 DLMMfgContextSolver!main+0x146d
ffffffff ffffffff bffde000 DLMMfgContextSolver!__tmainCRTStartup+0x10f
#
Please give you comments to understand what might have caused the deadlock.
Note: the moment i make the static variable as non static the problem disappears this in context of example posted in forum Deadlock occurs in Function Scoped Static variables (Thread Unsafe in VC++)
In short, what caused the deadlock is that you did something non-trivial in DllMain.
I am trying to debug an IE 8 crash caused by a Silverlight application. I managed to find some articles on how to do a memory dump when a process crashes. I loaded the dump in windbg and ran !analyze -v. Below is the result. I am stuck at what further steps I can take to figure out what module or library that is running in Silverlight is causing the crash. So all I have right now is the crash in IE is caused by an Access violation (attempt to execute non-executable address) and from what is in the stack trace that some animation is running in Silverlight.
Any tips or articles that would help me debug this will be appreciated.
This dump file has an exception of interest stored in it.
The stored exception information can be accessed via .ecxr.
(1864.1560): Access violation - code c0000005 (first/second chance not available)
eax=00000000 ebx=00000000 ecx=1b11fc58 edx=5c6f007d esi=00000000 edi=193b8e08
eip=00000000 esp=0f61f750 ebp=0f61f76c iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206
00000000 ?? ???
FAULTING_IP:
+56b3952f04ebde68
748bc9f1 654c dec esp
EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 748bc9f1
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000008
Parameter[1]: 00000000
Attempt to execute non-executable address 00000000
PROCESS_NAME: iexplore.exe
ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.
EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.
EXCEPTION_PARAMETER1: 00000008
EXCEPTION_PARAMETER2: 00000000
WRITE_ADDRESS: 00000000
FOLLOWUP_IP:
agcore!CFrameworkElement::SetValue+1d7
5c704fa8 84c0 test al,al
FAILED_INSTRUCTION_ADDRESS:
+56b3952f04ebde68
748bc9f1 654c dec esp
NTGLOBALFLAG: 0
APPLICATION_VERIFIER_FLAGS: 0
FAULTING_THREAD: 00001560
BUGCHECK_STR: APPLICATION_FAULT_SOFTWARE_NX_FAULT_NULL
PRIMARY_PROBLEM_CLASS: SOFTWARE_NX_FAULT_NULL
DEFAULT_BUCKET_ID: SOFTWARE_NX_FAULT_NULL
LAST_CONTROL_TRANSFER: from 5c704fa8 to 00000000
STACK_TEXT:
WARNING: Frame IP not in any known module. Following frames may be wrong.
0f61f74c 5c704fa8 1b17a134 193b8e08 0e690e14 0x0
0f61f76c 5c712360 0e690e14 1b17a134 0e690e14 agcore!CFrameworkElement::SetValue+0x1d7
0f61f788 5c7123a8 0e690e14 1b17a134 0e690e14 agcore!CShape::SetValue+0x72
0f61f7a0 5c70a6ff 0e690e14 1b17a134 00000000 agcore!CEllipse::SetValue+0x3b
0f61f7d0 5c752c2b 1b17a090 193b8e08 00000000 agcore!CAnimation::DoSetValue+0x50
0f61f810 5c7a7fb1 0f61f884 0f61f868 1b17a090 agcore!CAnimation::UpdateAnimationUsingKeyFrames+0x3b5
0f61f82c 5c707146 00000000 00000000 00000000 agcore!CAnimation::UpdateAnimation+0x184
0f61f87c 5c7071e5 3e4c8000 0f61f8cc 00000000 agcore!CTimeline::ComputeState+0x13a
0f61f89c 5c706d49 193f82b0 0f61f8cc 0f61f8d4 agcore!CTimelineGroup::ComputeState+0x8c
0f61f8ac 5c7069c7 3e4c8000 0f61f8cc 0b111f60 agcore!CStoryboard::ComputeState+0x48
0f61f8d4 5c706a29 0e6a0ca0 00000000 0e490070 agcore!CTimeManager::Tick+0x79
0f61f8e8 5c78f960 0b0e6d68 0f61f990 00000000 agcore!CCoreServices::Tick+0x21
0f61f940 5c706ac2 0b111f60 0e42ca08 ffffffff agcore!CCoreServices::Draw+0x140
0f61f964 67ac141c 0af99b90 00000000 0f61f990 agcore!CCoreServices::Draw+0x2d
0f61f9b4 67a933c2 0f61f9c8 00000000 00000000 npctrl!CXcpBrowserHost::OnTick+0x1b1
0f61f9e0 67a927c6 0064069c 00000402 00000000 npctrl!CXcpDispatcher::Tick+0xf3
0f61fa08 67a92709 0064069c 00000402 00000000 npctrl!CXcpDispatcher::OnReentrancyProtectedWindowMessage+0xcd
0f61fa28 764b6238 0064069c 00000402 00000000 npctrl!CXcpDispatcher::WindowProc+0xb8
0f61fa54 764b68ea 67a9269d 0064069c 00000402 user32!InternalCallWinProc+0x23
0f61facc 764b7d31 00000000 67a9269d 0064069c user32!UserCallWinProcCheckWow+0x109
0f61fb2c 764b7dfa 67a9269d 00000000 0f61fbb4 user32!DispatchMessageWorker+0x3bc
0f61fb3c 6fe504a6 0f61fb54 00000000 0ab11908 user32!DispatchMessageW+0xf
0f61fbb4 6fe60446 0af956a0 00000000 0b18a338 ieframe!CTabWindow::_TabWindowThreadProc+0x452
0f61fc6c 769d49bd 0ab11908 00000000 0f61fc88 ieframe!LCIETab_ThreadProc+0x2c1
0f61fc7c 76e53677 0b18a338 0f61fcc8 77829d72 iertutil!CIsoScope::RegisterThread+0xab
0f61fc88 77829d72 0b18a338 7dbc895d 00000000 kernel32!BaseThreadInitThunk+0xe
0f61fcc8 77829d45 769d49af 0b18a338 00000000 ntdll!__RtlUserThreadStart+0x70
0f61fce0 00000000 769d49af 0b18a338 00000000 ntdll!_RtlUserThreadStart+0x1b
SYMBOL_STACK_INDEX: 1
SYMBOL_NAME: agcore!CFrameworkElement::SetValue+1d7
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: agcore
IMAGE_NAME: agcore.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 4a67e422
STACK_COMMAND: ~44s; .ecxr ; kb
FAILURE_BUCKET_ID: SOFTWARE_NX_FAULT_NULL_c0000005_agcore.dll!CFrameworkElement::SetValue
BUCKET_ID: APPLICATION_FAULT_SOFTWARE_NX_FAULT_NULL_BAD_IP_agcore!CFrameworkElement::SetValue+1d7
This morning one of the third-party libraries that we were using in Silverlight was updated and that fixed the problem.
One of the ways to identify the cause you would have to get the memory dump and look for call-stack. Here are couple of links to identify the cause here and here
Here is existing answer Is anyone else experiencing weird debug + crash behavior with Silverlight?