VisualGDB / J-Link / Cortex-M0 issue

[zzattack]

I’ve encountered problems when trying to debug a Cortex-M0 project using a SEGGER J-Link device. The microcontroller is a STM32F091CC and debugging works perfectly fine over SWD with ST-Link devices.

Programming works fine and the debugging session seems to start, but breakpoints are never hit and there’s all sorts of errors in the GDB session output window.

I’ve tried several combinations of versions, J-Link 6.30, 6.31 and 6.32, and VisualGDB 5.3 and 5.4 preview.

 

 

[code]
VisualGDB is licensed to Frank Razenberg at Razenberg Engineering
c:\sysgcc\arm-eabi\bin\arm-eabi-gdb.exe –interpreter mi C:\Users\Frank\Desktop\multichip\obd2-device\obd2\VisualGDB\Debug\obd2
-gdb-version
=thread-group-added,id=”i1″
GNU gdb (GDB) 8.0.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html&gt;
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type “show copying”
and “show warranty” for details.
This GDB was configured as “–host=i686-w64-mingw32 –target=arm-eabi”.
Type “show configuration” for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/&gt;.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/&gt;.
For help, type “help”.
Type “apropos word” to search for commands related to “word”…
Reading symbols from C:\Users\Frank\Desktop\multichip\obd2-device\obd2\VisualGDB\Debug\obd2…
done.
GNU gdb (GDB) 8.0.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html&gt;
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type “show copying”
and “show warranty” for details.
This GDB was configured as “–host=i686-w64-mingw32 –target=arm-eabi”.
Type “show configuration” for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/&gt;.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/&gt;.
For help, type “help”.
Type “apropos word” to search for commands related to “word”.
OK
-list-features
^done,features=[“frozen-varobjs”,”pending-breakpoints”,”thread-info”,”data-read-memory-bytes”,”breakpoint-notifications”,”ada-task-info”,”language-option”,”info-gdb-mi-command”,”undefined-command-error-code”,”exec-run-start-option”]
-gdb-set disassembly-flavor intel
No symbol “disassembly” in current context.
-gdb-set print demangle off
OK
-break-insert -f main
^done,bkpt={number=”1″,type=”breakpoint”,disp=”keep”,enabled=”y”,addr=”0x08017ed8″,func=”main”,file=”C:/Users/Frank/Desktop/multichip/obd2-device/Src/main.c”,fullname=”C:\\Users\\Frank\\Desktop\\multichip\\obd2-device\\Src\\main.c”,line=”103″,thread-groups=[“i1″],times=”0″,original-location=”main”}
target remote :57180
&”target remote :57180\n”
Remote debugging using :57180
=thread-group-started,id=”i1″,pid=”42000″
=thread-created,id=”1″,group-id=”i1″
0x08012274 in GSM_Delay (GSM=0x2000074c <GSM>, timeout=100) at C:/Users/Frank/Desktop/multichip/obd2-device/gsm/gsm.c:3113
3113 } while (GSM->Time – start < timeout);
*stopped,frame={addr=”0x08012274″,func=”GSM_Delay”,args=[{name=”GSM”,value=”0x2000074c <GSM>”},{name=”timeout”,value=”100″}],file=”C:/Users/Frank/Desktop/multichip/obd2-device/gsm/gsm.c”,fullname=”C:\\Users\\Frank\\Desktop\\multichip\\obd2-device\\gsm\\gsm.c”,line=”3113″},thread-id=”1″,stopped-threads=”all”
info shared
OK
&”info shared\n”
No shared libraries loaded at this time.
OK
mon reset
&”mon reset\n”
Resetting target
OK
load
&”load\n”
Loading section .isr_vector, size 0xbc lma 0x8000000
+download,{section=”.isr_vector”,section-size=”188″,total-size=”1112444″}
+download,{section=”.isr_vector”,section-sent=”188″,section-size=”188″,total-sent=”188″,total-size=”1112444″}
Loading section .text, size 0x23aa0 lma 0x80000c0
+download,{section=”.text”,section-size=”146080″,total-size=”1112444″}
Loading section .exidx, size 0x8 lma 0x8023b60
+download,{section=”.exidx”,section-size=”8″,total-size=”1112444″}
Loading section .init_array, size 0x4 lma 0x8023b68
+download,{section=”.init_array”,section-size=”4″,total-size=”1112444″}
Loading section .fini_array, size 0x4 lma 0x8023b6c
+download,{section=”.fini_array”,section-size=”4″,total-size=”1112444″}
Loading section .data, size 0x1e0 lma 0x8023b70
+download,{section=”.data”,section-size=”480″,total-size=”1112444″}
Start address 0x802097c, load size 146764
Transfer rate: 23887 KB/sec, 9784 bytes/write.
OK
-data-evaluate-expression “sizeof(void *)”
^done,value=”4″
-data-evaluate-expression “sizeof(int)”
-data-evaluate-expression “sizeof(short)”
^done,value=”4″
^done,value=”2″
-data-evaluate-expression “sizeof(long)”
^done,value=”4″
-data-evaluate-expression “sizeof(long long)”
^done,value=”8″
-data-evaluate-expression “sizeof(char)”
^done,value=”1″
-data-evaluate-expression “sizeof(wchar_t)”
^done,value=”4″
-data-evaluate-expression “sizeof(float)”
^done,value=”4″
-data-evaluate-expression “sizeof(double)”
^done,value=”8″
-data-evaluate-expression “sizeof(long double)”
^done,value=”8″
info target
&”info target\n”
Symbols from “C:\Users\Frank\Desktop\multichip\obd2-device\obd2\VisualGDB\Debug\obd2”.
Remote serial target in gdb-specific protocol:
Debugging a target over a serial line.
While running this, GDB does not access memory from…
Local exec file:
`
C:\Users\Frank\Desktop\multichip\obd2-device\obd2\VisualGDB\Debug\obd2′, file type elf32-littlearm.
Entry point: 0x802097c
0x08000000 – 0x080000bc is .isr_vector
0x080000c0 – 0x08023b60 is .text
0x08023b60 – 0x08023b68 is .exidx
0x08023b68 – 0x08023b6c is .init_array
0x08023b6c – 0x08023b70 is .fini_array
0x20000000 – 0x200001e0 is .data
0x200001e0 – 0x200073e0 is .bss
OK
-data-evaluate-expression “&_estack”
^done,value=”0x20008000″
-var-create – * “*((void **)0x20007ffc)”
^done,name=”var1″,numchild=”0″,value=”0x80209ad <Reset_Handler+48>”,type=”void *”,has_more=”0″
-var-assign “var1″ 0x3b2a0780
^done,value=”0x3b2a0780”
-data-evaluate-expression “\*\(\(void\ \*\*\)0x20007ffc\)”
^done,value=”0x3b2a0780″
info signals
&”info signals\n”
Signal Stop Print Pass to program Description

SIGHUP Yes Yes Yes Hangup
SIGINT Yes Yes No Interrupt
SIGQUIT Yes Yes Yes Quit
SIGILL Yes Yes Yes Illegal instruction
SIGTRAP Yes Yes No Trace/breakpoint trap
SIGABRT Yes Yes Yes Aborted
SIGEMT Yes Yes Yes Emulation trap
SIGFPE Yes Yes Yes Arithmetic exception
SIGKILL Yes Yes Yes Killed
SIGBUS Yes Yes Yes Bus error
SIGSEGV Yes Yes Yes Segmentation fault
SIGSYS Yes Yes Yes Bad system call
SIGPIPE Yes Yes Yes Broken pipe
SIGALRM No No Yes Alarm clock
SIGTERM Yes Yes Yes Terminated
SIGURG No No Yes Urgent I/O condition
SIGSTOP Yes Yes Yes Stopped (signal)
SIGTSTP Yes Yes Yes Stopped (user)
SIGCONT Yes Yes Yes Continued
SIGCHLD No No Yes Child status changed
SIGTTIN Yes Yes Yes Stopped (tty input)
SIGTTOU Yes Yes Yes Stopped (tty output)
SIGIO No No Yes I/O possible
SIGXCPU Yes Yes Yes CPU time limit exceeded
SIGXFSZ Yes Yes Yes File size limit exceeded
SIGVTALRM No No Yes Virtual timer expired
SIGPROF No No Yes Profiling timer expired
SIGWINCH No No Yes Window size changed
SIGLOST Yes Yes Yes Resource lost
SIGUSR1 Yes Yes Yes User defined signal 1
SIGUSR2 Yes Yes Yes User defined signal 2
SIGPWR Yes Yes Yes Power fail/restart
SIGPOLL No No Yes Pollable event occurred
SIGWIND Yes Yes Yes SIGWIND
SIGPHONE Yes Yes Yes SIGPHONE
SIGWAITING No No Yes Process’s LWPs are blocked
SIGLWP No No Yes Signal LWP
SIGDANGER Yes Yes Yes Swap space dangerously low
SIGGRANT Yes Yes Yes Monitor mode granted
SIGRETRACT Yes Yes Yes Need to relinquish monitor mode
SIGMSG Yes Yes Yes Monitor mode data available
SIGSOUND Yes Yes Yes Sound completed
SIGSAK Yes Yes Yes Secure attention
SIGPRIO No No Yes SIGPRIO
SIG33 Yes Yes Yes Real-time event 33
SIG34 Yes Yes Yes Real-time event 34
SIG35 Yes Yes Yes Real-time event 35
SIG36 Yes Yes Yes Real-time event 36
SIG37 Yes Yes Yes Real-time event 37
SIG38 Yes Yes Yes Real-time event 38
SIG39 Yes Yes Yes Real-time event 39
SIG40 Yes Yes Yes Real-time event 40
SIG41 Yes Yes Yes Real-time event 41
SIG42 Yes Yes Yes Real-time event 42
SIG43 Yes Yes Yes Real-time event 43
SIG44 Yes Yes Yes Real-time event 44
SIG45 Yes Yes Yes Real-time event 45
SIG46 Yes Yes Yes Real-time event 46
SIG47 Yes Yes Yes Real-time event 47
SIG48 Yes Yes Yes Real-time event 48
SIG49 Yes Yes Yes Real-time event 49
SIG50 Yes Yes Yes Real-time event 50
SIG51 Yes Yes Yes Real-time event 51
SIG52 Yes Yes Yes Real-time event 52
SIG53 Yes Yes Yes Real-time event 53
SIG54 Yes Yes Yes Real-time event 54
SIG55 Yes Yes Yes Real-time event 55
SIG56 Yes Yes Yes Real-time event 56
SIG57 Yes Yes Yes Real-time event 57
SIG58 Yes Yes Yes Real-time event 58
SIG59 Yes Yes Yes Real-time event 59
SIG60 Yes Yes Yes Real-time event 60
SIG61 Yes Yes Yes Real-time event 61
SIG62 Yes Yes Yes Real-time event 62
SIG63 Yes Yes Yes Real-time event 63
SIGCANCEL No No Yes LWP internal signal
SIG32 Yes Yes Yes Real-time event 32
SIG64 Yes Yes Yes Real-time event 64
SIG65 Yes Yes Yes Real-time event 65
SIG66 Yes Yes Yes Real-time event 66
SIG67 Yes Yes Yes Real-time event 67
SIG68 Yes Yes Yes Real-time event 68
SIG69 Yes Yes Yes Real-time event 69
SIG70 Yes Yes Yes Real-time event 70
SIG71 Yes Yes Yes Real-time event 71
SIG72 Yes Yes Yes Real-time event 72
SIG73 Yes Yes Yes Real-time event 73
SIG74 Yes Yes Yes Real-time event 74
SIG75 Yes Yes Yes Real-time event 75
SIG76 Yes Yes Yes Real-time event 76
SIG77 Yes Yes Yes Real-time event 77
SIG78 Yes Yes Yes Real-time event 78
SIG79 Yes Yes Yes Real-time event 79
SIG80 Yes Yes Yes Real-time event 80
SIG81 Yes Yes Yes Real-time event 81
SIG82 Yes Yes Yes Real-time event 82
SIG83 Yes Yes Yes Real-time event 83
SIG84 Yes Yes Yes Real-time event 84
SIG85 Yes Yes Yes Real-time event 85
SIG86 Yes Yes Yes Real-time event 86
SIG87 Yes Yes Yes Real-time event 87
SIG88 Yes Yes Yes Real-time event 88
SIG89 Yes Yes Yes Real-time event 89
SIG90 Yes Yes Yes Real-time event 90
SIG91 Yes Yes Yes Real-time event 91
SIG92 Yes Yes Yes Real-time event 92
SIG93 Yes Yes Yes Real-time event 93
SIG94 Yes Yes Yes Real-time event 94
SIG95 Yes Yes Yes Real-time event 95
SIG96 Yes Yes Yes Real-time event 96
SIG97 Yes Yes Yes Real-time event 97
SIG98 Yes Yes Yes Real-time event 98
SIG99 Yes Yes Yes Real-time event 99
SIG100 Yes Yes Yes Real-time event 100
SIG101 Yes Yes Yes Real-time event 101
SIG102 Yes Yes Yes Real-time event 102
SIG103 Yes Yes Yes Real-time event 103
SIG104 Yes Yes Yes Real-time event 104
SIG105 Yes Yes Yes Real-time event 105
SIG106 Yes Yes Yes Real-time event 106
SIG107 Yes Yes Yes Real-time event 107
SIG108 Yes Yes Yes Real-time event 108
SIG109 Yes Yes Yes Real-time event 109
SIG110 Yes Yes Yes Real-time event 110
SIG111 Yes Yes Yes Real-time event 111
SIG112 Yes Yes Yes Real-time event 112
SIG113 Yes Yes Yes Real-time event 113
SIG114 Yes Yes Yes Real-time event 114
SIG115 Yes Yes Yes Real-time event 115
SIG116 Yes Yes Yes Real-time event 116
SIG117 Yes Yes Yes Real-time event 117
SIG118 Yes Yes Yes Real-time event 118
SIG119 Yes Yes Yes Real-time event 119
SIG120 Yes Yes Yes Real-time event 120
SIG121 Yes Yes Yes Real-time event 121
SIG122 Yes Yes Yes Real-time event 122
SIG123 Yes Yes Yes Real-time event 123
SIG124 Yes Yes Yes Real-time event 124
SIG125 Yes Yes Yes Real-time event 125
SIG126 Yes Yes Yes Real-time event 126
SIG127 Yes Yes Yes Real-time event 127
SIGINFO Yes Yes Yes Information request
EXC_BAD_ACCESS Yes Yes Yes Could not access memory
EXC_BAD_INSTRUCTION Yes Yes Yes Illegal instruction/operand
EXC_ARITHMETIC Yes Yes Yes Arithmetic exception
EXC_EMULATION Yes Yes Yes Emulation instruction
EXC_SOFTWARE Yes Yes Yes Software generated exception
EXC_BREAKPOINT Yes Yes Yes Breakpoint
SIGLIBRT No No Yes librt internal signal
Use the “handle” command to change these tables.
OK
-exec-continue
^running
*running,thread-id=”all”
&”Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061\n”
&”Quit (expect signal SIGINT when the program is resumed)\n”
-stack-list-frames –thread 1
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-stack-list-frames –thread 1 0 0
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-data-evaluate-expression –thread 1 “\$pc”
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-stack-list-frames –thread 1
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-stack-list-frames –thread 1 0 0
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-data-evaluate-expression –thread 1 “\$pc”
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-stack-list-frames –thread 1
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-stack-list-frames –thread 1 0 0
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
-data-evaluate-expression –thread 1 “\$pc”
Remote failure reply: E0010020000000000000000000000000E0730020503D0208FFFFFFFFF87F0020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF87F0020AD090208D87E010800000061
[/code]

• This topic was modified 6 years, 7 months ago by zzattack.
• This topic was modified 6 years, 7 months ago by zzattack.

[support]

Hi,

This looks like a problem inside the Segger gdb stub. Please check with Segger support whether they have a fix for this.

[zzattack]

You seem to be correct, I get much different results with older j-link releases to a point where debugging is somewhat functional.
The issue I run into with those is setting breakpoints while a program is running:

“Failed to create a breakpoint: Cannot execute this command while the target is running. Use the “interrupt” command to stop the target and then try again.”

Manually adding a ‘interrupt’ in the GDB window does the trick but it feels as if VisualGDB should be able to take care of this.

Hitting ‘break all’ and then setting a breakpoint doesn’t work either. Worse yet, resuming doesn’t work then either:

-exec-continue
Cannot execute this command while the selected thread is running.
-stack-list-frames --thread 1
Selected thread is running.
-stack-list-frames --thread 1 0 0
Selected thread is running.
-data-evaluate-expression --thread 1 "\$pc"
Selected thread is running.
-stack-list-frames --thread 1
Selected thread is running.
-stack-list-frames --thread 1 0 0
Selected thread is running.
-data-evaluate-expression --thread 1 "\$pc"
Selected thread is running.

I can’t tell whether this is VisualGDB or J-Link related and/or whether (soft-) remedies are available.

[support]

Hi,

Please try reproducing it on a newly created project. You might have accidentally overridden some settings that control temporary breaks for setting breakpoints. If the problem does not reappear on a newly created project, please compare the .vgdbsettings files of both projects.

[Author]

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