Hi Jonah,
Sure, I’ll leave the GDB traces for Windows and Linux below. But please keep in mind that reproducing the problem is fairly easy and there’s no need for any complicated setups.
Ignore my complicated setup from Windows. :-)
Thanks,
Adrian
------------------ GDB traces – Windows host ------------------
174,573 (gdb)
176,138 3-gdb-version
176,145 ~"GNU gdb (GNU Tools for Arm Embedded Processors 9-2019-q4-major) 8.3.0.20190709-git\n"
176,145 ~"Copyright (C) 2019 Free Software Foundation, Inc.\n"
176,145 ~"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\nThis
is fre\
e software: you are free to change and redistribute it.\nThere is NO WARRANTY, to the extent permitt\
ed by law."
176,145 ~"\nType \"show copying\" and \"show warranty\" for details.\n"
176,145 ~"This GDB was configured as \"--host=i686-w64-mingw32 --target=arm-none-eabi\".\n"
176,145 ~"Type \"show configuration\" for configuration details.\n"
176,145 ~"For bug reporting instructions, please see:\n"
176,145 ~"<http://www.gnu.org/software/gdb/bugs/>.\n"
176,145 ~"Find the GDB manual and other documentation resources online at:\n <http://www.gnu.org/\
software/gdb/documentation/>."
176,145 ~"\n\n"
176,146 ~"For help, type \"help\".\n"
176,146 ~"Type \"apropos word\" to search for commands related to \"word\".\n"
176,146 3^done
176,146 (gdb)
176,147 4-environment-cd xxx/frdmk\
w36_demo_apps_bubble
176,158 4^done
176,158 (gdb)
176,159 5-gdb-set breakpoint pending on
176,170 5^done
176,170 (gdb)
176,171 6-gdb-set detach-on-fork on
176,180 6^done
176,180 (gdb)
176,181 7-enable-pretty-printing
176,191 7^done
176,191 (gdb)
176,192 8-gdb-set python print-stack none
176,201 8^done
176,201 (gdb)
176,202 9-gdb-set print object on
176,212 9^done
176,212 (gdb)
176,213 10-gdb-set print sevenbit-strings on
176,222 10^done
176,222 (gdb)
176,222 11-gdb-set host-charset UTF-8
176,233 11^done
176,233 (gdb)
176,234 12-gdb-set target-charset WINDOWS-1252
176,243 12^done
176,243 (gdb)
176,244 13-gdb-set target-wide-charset UTF-16
176,254 13^done
176,254 (gdb)
176,254 14-gdb-set dprintf-style call
176,264 14^done
176,264 (gdb)
176,265 15-gdb-set target-async off
176,274 15^done
176,274 (gdb)
176,275 16-gdb-set record full stop-at-limit off
176,284 16^done
176,284 (gdb)
176,285 17-gdb-set auto-solib-add on
176,294 17^done
176,294 (gdb)
176,299 18-file-exec-and-symbols --thread-group i1 xxx/frdmkw36_demo_apps_bubble/Debug/frdmkw36_demo_apps_bubble.axf
176,317 18^done
176,317 (gdb)
176,318 19-interpreter-exec console "set remotetimeout 60000"
176,327 =cmd-param-changed,param="remotetimeout",value="60000"
176,327 19^done
176,327 (gdb)
176,334 20-target-select extended-remote | xxx_custom_stub_invoked_xxx
177,765 =thread-group-started,id="i1",pid="42000"
177,766 =thread-created,id="1",group-id="i1"
177,827 ~"ResetISR () at ../startup/startup_mkw36z4.c:288\n"
177,827 ~"288\tvoid ResetISR(void) {\n"
177,827 *stopped,frame={addr="0x00000124",func="ResetISR",args=[],file="../startup/startup_mkw36z4.c\
",fullname="xxx\\frdmkw36_demo\
_apps_bubble\\startup\\startup_mkw36z4.c",line="288",arch="armv6s-m"},thread-id="1",stopped-threads=\
"all"
177,844 20^connected
177,844 (gdb)
177,845 21-interpreter-exec console "set mem inaccessible-by-default off"
177,854 =cmd-param-changed,param="mem inaccessible-by-default",value="off"
177,854 21^done
177,854 (gdb)
177,855 22-interpreter-exec console "mon ondisconnect cont"
177,876 22^done
177,876 (gdb)
177,877 23-interpreter-exec console "set arm force-mode thumb"
177,886 =cmd-param-changed,param="arm force-mode",value="thumb"
177,886 23^done
177,886 (gdb)
177,887 24-interpreter-exec console "set remote hardware-breakpoint-limit 4"
177,897 =cmd-param-changed,param="remote hardware-breakpoint-limit",value="4"
177,897 24^done
177,897 (gdb)
177,898 25set range-stepping on
177,907 &"set range-stepping on\n"
177,918 25^done
177,918 (gdb)
177,919 26-interpreter-exec console "mon semihost enable"
177,939 26^done
177,940 (gdb)
177,940 27-target-download
177,951 27+download,{section=".text",section-size="28328",total-size="180010"}
177,951 27+download,{section=".text",section-sent="16000",section-size="28328",total-sent="16000",to\
tal-size="180010"}
177,952 27+download,{section=".data",section-size="112",total-size="180010"}
178,415 28-list-thread-groups
178,554 27^done,address="0x124",load-size="28440",transfer-rate="397760",write-rate="9480"
178,554 (gdb)
178,555 29-interpreter-exec console "mon SWO datasource"
178,556 28^done,groups=[{id="i1",type="process",pid="42000",executable="xxx\\frdmkw36_demo_apps_bubble\\Debug\\frdmkw36_demo_apps_\
bubble.axf"}]
178,556 (gdb)
178,563 30-list-thread-groups i1
178,567 29^done
178,567 (gdb)
178,580 30^done,threads=[{id="1",target-id="Thread 1",details="Runnable",frame={level="0",addr="0x00\
000124",func="ResetISR",args=[],file="../startup/startup_mkw36z4.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\startup\\startup_mkw\
36z4.c",line="288",arch="armv6s-m"},state="stopped"}]
178,580 (gdb)
178,587 31-gdb-show --thread-group i1 language
178,588 32-stack-info-depth --thread 1 11
178,591 31^done,value="auto"
178,591 (gdb)
178,592 32^done,depth="1"
178,592 (gdb)
178,592 33-gdb-set --thread-group i1 language c
178,603 33^done
178,603 (gdb)
178,604 34-interpreter-exec --thread-group i1 console "p/x (char)-1"
178,614 ~"$1 = 0xff\n"
178,614 34^done
178,614 (gdb)
178,615 35-data-evaluate-_expression_ --thread-group i1 "sizeof (void*)"
178,624 35^done,value="4"
178,625 (gdb)
178,625 36-gdb-set --thread-group i1 language auto
178,636 36^done
178,636 (gdb)
178,636 37-interpreter-exec --thread-group i1 console "show endian"
178,646 ~"The target endianness is set automatically (currently little endian)\n"
178,646 37^done
178,646 (gdb)
178,768 38-break-insert -t -h -f main
178,796 38^done,bkpt={number="1",type="hw breakpoint",disp="del",enabled="y",addr="0x000007c2",func=\
"main",file="../source/bubble.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\source\\bubble.c",line="163",thread-groups=["i1"],times\
="0",original-location="main"}
178,796 (gdb)
178,802 39-exec-continue --thread-group i1
178,806 39^running
178,806 *running,thread-id="all"
178,807 (gdb)
178,915 =breakpoint-modified,bkpt={number="1",type="hw breakpoint",disp="del",enabled="y",addr="0x00\
0007c2",func="main",file="../source/bubble.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\source\\bubble.c",line="163",thread-groups\
=["i1"],times="1",original-location="main"}
178,937 ~"\n"
178,937 ~"Temporary breakpoint 1, main () at ../source/bubble.c:163\n"
178,938 ~"163\t uint8_t sensorRange = 0;\n"
178,938 *stopped,reason="breakpoint-hit",disp="del",bkptno="1",frame={addr="0x000007c2",func="main",\
args=[],file="../source/bubble.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\source\\bubble.c",line="163",arch="armv6s-m"},thread-i\
d="1",stopped-threads="all"
178,938 =breakpoint-deleted,id="1"
178,938 (gdb)
180,464 40-stack-select-frame --thread 1 0
180,470 40^done
180,470 (gdb)
180,482 41-stack-info-depth --thread 1 2
180,492 41^done,depth="1"
180,492 (gdb)
181,336 42-data-list-register-names --thread-group i1
181,346 42^done,register-names=["r0","r1","r2","r3","r4","r5","r6","r7","r8","r9","r10","r11","r12",\
"sp","lr","pc","","","","","","","","","","xpsr","","","","","","","","","","","","","","","","","",\
"","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","\
","","","","","","","","","","","","","","","msp","psp","control","primask","cycles"]
181,347 (gdb)
181,349 43-data-list-register-values --thread 1 --frame 0 x 25
181,389 43^done,register-values=[{number="25",value="0x61000000"}]
181,389 (gdb)
181,591 44-thread-info 1
181,599 44^done,threads=[{id="1",target-id="Thread 1",details=" ",frame={level="0",addr="0x000007c2"\
,func="main",args=[],file="../source/bubble.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\source\\bubble.c",line="163",arch="armv6s\
-m"},state="stopped"}]
181,600 (gdb)
182,965 45-stack-select-frame --thread 1 0
182,975 45^done
182,975 (gdb)
183,156 46-stack-select-frame --thread 1 0
183,163 46^done
183,163 (gdb)
//***** Executing the python script using Debugger Console *****//
191,292 47-interpreter-exec console "source post_event.py"
191,297 47^done
191,298 (gdb)
//***** Resuming from Eclipse. Target app now stopped in 'main'. *****//
202,900 48-exec-continue --thread 1
202,908 48^running
202,908 *running,thread-id="all"
202,908 (gdb)
202,956 49-thread-select 1
//***** Suspending from Eclipse. 'continue' gets executed from the script and Eclipse shows app as running (expected) *****//
212,656 ~"\nProgram"
212,657 ~" received signal SIGINT, Interrupt.\n"
212,707 ~"0x00001d9c in I2C_MasterTransferBlocking (base=0x40066000, xfer=0x2000bfbc) at ../drivers/\
fsl_i2c.c:964\n"
212,707 ~"964\t while (!(base->S & kI2C_IntPendingFlag))\n"
212,707 *stopped,reason="signal-received",signal-name="SIGINT",signal-meaning="Interrupt",frame={add\
r="0x00001d9c",func="I2C_MasterTransferBlocking",args=[{name="base",value="0x40066000"},{name="xfer"\
,value="0x2000bfbc"}],file="../drivers/fsl_i2c.c",fullname="xxx\\frdmkw36_demo_apps_bubble\\drivers\\fsl_i2c.c",line="964",arch="a\
rmv6s-m"},thread-id="1",stopped-threads="all"
212,707 (gdb)
212,708 ~"Executing <continue>\n"
212,708 *running,thread-id="all"
212,710 50-data-list-register-values --thread 1 --frame 0 x 25
212,719 49^error,msg="Cannot execute this command while the target is running.\nUse the \"interrupt\\
" command to stop the target\nand then try again."
212,720 (gdb)
212,720 50^error,msg="Selected thread is running."
212,720 (gdb)
//***** Suspend again. Now we should see target really suspended. However, 'interrupt failed' error is shown. *****//
222,474 &"Quit\n"
222,975 51-interpreter-exec --thread-group i1 console kill
222,975 &"Quit\n"
222,976 ~"Kill the program being debugged? (y or n) [answered Y; input not from terminal]\n"
222,976 &"Cannot execute this command while the target is running.\n"
222,976 &"Use the \"interrupt\" command to stop the target\n"
222,976 &"and then try again.\n"
222,976 51^error,msg="Cannot execute this command while the target is running.\nUse the \"interrupt\\
" command to stop the target\nand then try again."
222,976 (gdb)
//***** Terminate executed. Error is shown. Debug session not terminated. *****//
236,776 52-thread-select 1
236,777 52^error,msg="Cannot execute this command while the target is running.\nUse the \"interrupt\\
" command to stop the target\nand then try again."
236,777 (gdb)
238,277 &"Quit\n"
238,777 53-interpreter-exec --thread-group i1 console kill
238,777 &"Quit\n"
238,778 ~"Kill the program being debugged? (y or n) [answered Y; input not from terminal]\n"
238,779 &"Cannot execute this command while the target is running.\n"
238,779 &"Use the \"interrupt\" command to stop the target\n"
238,779 &"and then try again.\n"
238,779 53^error,msg="Cannot execute this command while the target is running.\nUse the \"interrupt\\
" command to stop the target\nand then try again."
238,779 (gdb)
------------------ GDB traces – Linux host ------------------
300,506 2-gdb-version
300,508 ~"GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git\n"
300,511 ~"Copyright (C) 2018 Free Software Foundation, Inc.\n"
300,511 ~"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\nThis
is fre\
e software: you are free to change and redistribute it.\nThere is NO WARRANTY, to the extent permitt\
ed by law. Type \"show copying\"\nand \"show warranty\" for details.\n"
300,511 ~"This GDB was configured as \"x86_64-linux-gnu\".\nType \"show configuration\" for configur\
ation details."
300,511 ~"\nFor bug reporting instructions, please see:\n"
300,511 ~"<http://www.gnu.org/software/gdb/bugs/>.\n"
300,511 ~"Find the GDB manual and other documentation resources online at:\n<http://www.gnu.org/soft\
ware/gdb/documentation/>.\n"
300,511 ~"For help, type \"help\".\n"
300,511 ~"Type \"apropos word\" to search for commands related to \"word\".\n"
300,511 2^done
300,512 3-list-thread-groups
300,512 (gdb)
300,512 3^done,groups=[{id="i1",type="process"}]
300,512 (gdb)
300,512 4-environment-cd xxx/X
300,518 4^done
300,518 (gdb)
300,518 5-gdb-set breakpoint pending on
300,518 5^done
300,518 (gdb)
300,519 6-gdb-set detach-on-fork on
300,519 6^done
300,519 (gdb)
300,519 7-enable-pretty-printing
300,519 7^done
300,519 (gdb)
300,519 8-gdb-set python print-stack none
300,519 8^done
300,519 (gdb)
300,519 9-gdb-set print object on
300,519 9^done
300,519 (gdb)
300,519 10-gdb-set print sevenbit-strings on
300,519 10^done
300,519 (gdb)
300,520 11-gdb-set host-charset UTF-8
300,520 11^done
300,520 (gdb)
300,520 12-gdb-set target-charset UTF-8
300,520 12^done
300,520 (gdb)
300,520 13-gdb-set target-wide-charset UTF-32
300,520 13^done
300,520 (gdb)
300,523 14-gdb-set dprintf-style call
300,523 14^done
300,523 (gdb)
300,524 15source .gdbinit
300,524 &"source .gdbinit\n"
300,524 &".gdbinit: No such file or directory.\n"
300,524 15^error,msg=".gdbinit: No such file or directory."
300,524 (gdb)
300,524 16-gdb-set target-async on
300,524 16^done
300,524 (gdb)
300,524 17-gdb-set record full stop-at-limit off
300,524 17^done
300,524 (gdb)
300,525 18-gdb-set auto-solib-add on
300,525 18^done
300,525 (gdb)
300,528 19-file-exec-and-symbols --thread-group i1 xxx/X/Debug/X
300,530 19^done
300,530 (gdb)
300,530 20-gdb-show --thread-group i1 language
300,531 20^done,value="auto"
300,531 (gdb)
300,531 21-gdb-set --thread-group i1 language c
300,531 21^done
300,531 (gdb)
300,531 22-interpreter-exec --thread-group i1 console "p/x (char)-1"
300,531 ~"$1 = 0xff\n"
300,531 22^done
300,531 (gdb)
300,531 23-data-evaluate-_expression_ --thread-group i1 "sizeof (void*)"
300,532 23^done,value="8"
300,532 (gdb)
300,532 24-gdb-set --thread-group i1 language auto
300,532 24^done
300,532 (gdb)
300,532 25-interpreter-exec --thread-group i1 console "show endian"
300,532 ~"The target endianness is set automatically (currently little endian)\n"
300,533 25^done
300,533 (gdb)
300,533 26-break-insert -t -f main
300,533 26^done,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x0000000000400501",\
func="main",file="../src/X.c",fullname="xxx/X/src/X.c",line="15",thread-\
groups=["i1"],times="0",original-location="main"}
300,533 (gdb)
300,534 27-inferior-tty-set --thread-group i1 /dev/pts/22
300,534 27^done
300,534 (gdb)
300,535 28-exec-run --thread-group i1
300,537 =thread-group-started,id="i1",pid="29357"
300,537 =thread-created,id="1",group-id="i1"
300,539 29-list-thread-groups
300,570 =library-loaded,id="/lib64/ld-linux-x86-64.so.2",target-name="/lib64/ld-linux-x86-64.so.2",h\
ost-name="/lib64/ld-linux-x86-64.so.2",symbols-loaded="0",thread-group="i1",ranges=[{from="0x00007ff\
ff7dd5f10",to="0x00007ffff7df4b20"}]
300,584 28^running
300,584 *running,thread-id="all"
300,584 (gdb)
300,584 29^done,groups=[{id="i1",type="process",pid="29357",executable="xxx/X/Debug/X",cores=["3"]}]
300,584 (gdb)
300,587 =library-loaded,id="/lib/x86_64-linux-gnu/libc.so.6",target-name="/lib/x86_64-linux-gnu/libc\
.so.6",host-name="/lib/x86_64-linux-gnu/libc.so.6",symbols-loaded="0",thread-group="i1",ranges=[{fro\
m="0x00007ffff7a052d0",to="0x00007ffff7b7dc3c"}]
300,755 =breakpoint-modified,bkpt={number="1",type="breakpoint",disp="del",enabled="y",addr="0x00000\
00000400501",func="main",file="../src/X.c",fullname="xxx/X/src/X.c",line\
="15",thread-groups=["i1"],times="1",original-location="main"}
300,755 ~"\n"
300,755 ~"Temporary breakpoint 1, main () at ../src/X.c:15\n"
300,755 ~"15\t\tputs(\"!!!Hello World!!!\"); /* prints !!!Hello World!!! */\n"
300,755 *stopped,reason="breakpoint-hit",disp="del",bkptno="1",frame={addr="0x0000000000400501",func\
="main",args=[],file="../src/X.c",fullname="xxx/X/src/X.c",line="15"},th\
read-id="1",stopped-threads="all",core="3"
300,755 =breakpoint-deleted,id="1"
300,760 30-list-thread-groups
300,760 30^done,groups=[{id="i1",type="process",pid="29357",executable="xxx/X/Debug/X",cores=["3"]}]
300,760 (gdb)
300,933 31-list-thread-groups i1
300,934 31^done,threads=[{id="1",target-id="process 29357",name="X",frame={level="0",addr="0x0000000\
000400501",func="main",args=[],file="../src/X.c",fullname="xxx/X/src/X.c\
",line="15"},state="stopped",core="3"}]
300,934 (gdb)
300,937 32-stack-info-depth --thread 1 11
300,938 32^done,depth="1"
300,938 (gdb)
300,952 33-stack-select-frame --thread 1 0
300,952 33^done
300,952 (gdb)
300,980 34-list-thread-groups
300,980 35-thread-info 1
300,980 34^done,groups=[{id="i1",type="process",pid="29357",executable="xxx/X/Debug/X",cores=["3"]}]
300,980 (gdb)
300,980 35^done,threads=[{id="1",target-id="process 29357",name="X",frame={level="0",addr="0x0000000\
000400501",func="main",args=[],file="../src/X.c",fullname="xxx/X/src/X.c\
",line="15"},state="stopped",core="3"}]
300,980 (gdb)
301,016 36-stack-list-locals --thread 1 --frame 0 1
301,016 36^done,locals=[]
301,016 (gdb)
//***** I don't see the execution of the python script being logged here. *****//
//***** But I guess it has something to do with the separate channel used by the Debugger Console. *****//
//***** Anyway... Resuming from 'main' *****//
350,925 37-exec-continue --thread 1
350,925 37^running
350,925 *running,thread-id="all"
350,925 (gdb)
350,948 38-thread-select 1
350,948 38^done,new-thread-id="1"
350,948 (gdb)
//***** Suspending from Eclipse. 'continue' gets executed from the script. *****//
//***** Compared to the behavior on Windows, I now see some empty stack frames in Debug view. We should see the app running in Eclipse. *****//
358,295 39-exec-interrupt --thread 1
358,296 39^done
358,296 (gdb)
358,296 ~"\nProgram"
358,296 ~" received signal SIGINT, Interrupt.\n"
358,296 ~"main () at ../src/X.c:16\n"
358,296 ~"16\t\twhile (1) { };\n"
358,296 *stopped,reason="signal-received",signal-name="SIGINT",signal-meaning="Interrupt",frame={add\
r="0x000000000040050b",func="main",args=[],file="../src/X.c",fullname="xxx/X/src/X.c",line="16"},thread-id="1",stopped-threads="all",core="3"
358,296 ~"Executing <continue>\n"
358,296 ^running
358,296 *running,thread-id="all"
358,300 40-stack-info-depth --thread 1 11
358,300 40^error,msg="Selected thread is running."
358,300 (gdb)
358,300 41-stack-list-frames --thread 1 0 10
358,300 41^error,msg="Selected thread is running."
358,300 (gdb)
358,304 42-stack-select-frame --thread 1 0
358,305 42^error,msg="Selected thread is running."
358,305 (gdb)
358,334 43-stack-info-depth --thread 1 2
358,334 43^error,msg="Selected thread is running."
358,335 (gdb)
358,335 44-stack-list-frames --thread 1 0 1
358,335 44^error,msg="Selected thread is running."
358,335 (gdb)
358,379 45-list-thread-groups
358,379 46-thread-info 1
358,381 45^done,groups=[{id="i1",type="process",pid="29357",executable="xxx/X/Debug/X",cores=["1"]}]
358,381 (gdb)
358,381 46^done,threads=[{id="1",target-id="process 29357",name="X",state="running",core="1"}]
358,381 (gdb)
358,382 47-stack-info-depth --thread 1 5
358,382 48-stack-list-locals --thread 1 --frame 0 1
358,382 47^error,msg="Selected thread is running."
358,383 (gdb)
358,383 48^error,msg="Selected thread is running."
358,383 (gdb)
358,383 49-stack-list-frames --thread 1 0 4
358,383 49^error,msg="Selected thread is running."
358,383 50-stack-list-locals --thread 1 --frame 0 0
358,383 (gdb)
358,383 50^error,msg="Selected thread is running."
358,383 (gdb)
358,386 51-stack-list-frames --thread 1
358,386 51^error,msg="Selected thread is running."
358,386 (gdb)
358,386 52-stack-list-frames --thread 1 1 1
358,386 53-stack-list-frames --thread 1 2 2
358,386 54-stack-list-frames --thread 1 3 3
358,386 55-stack-list-frames --thread 1 4 4
358,386 52^error,msg="Selected thread is running."
358,386 (gdb)
358,386 53^error,msg="Selected thread is running."
358,386 (gdb)
358,386 54^error,msg="Selected thread is running."
358,386 (gdb)
358,386 55^error,msg="Selected thread is running."
358,386 (gdb)
//***** Suspending again is not possible. Eclipse 'sees' the app as suspended, even though it is really executing. *****//
//***** Attempting a Terminate now. Surprisingly, debug session is terminated without any errors popping out. *****//
379,674 56-interpreter-exec --thread-group i1 console kill
379,674 ~"Kill the program being debugged? (y or n) [answered Y; input not from terminal]\n"
379,674 =thread-exited,id="1",group-id="i1"
379,674 =thread-group-exited,id="i1"
379,674 56^done
379,674 (gdb)
379,677 57-list-thread-groups i1
379,678 57^done,threads=[]
379,678 (gdb)
379,682 58-list-thread-groups
379,682 58^done,groups=[{id="i1",type="process",executable="xxx/X/Debug/\
X"}]
379,682 (gdb)
379,694 59-list-thread-groups
379,694 59^done,groups=[{id="i1",type="process",executable="xxx/X/Debug/\
X"}]
379,694 (gdb)
380,175 60-gdb-exit
380,175 60^exit
Caution: EXT Email
Hi Adrian,
This is an interesting use case. Thanks for posting it. The first step to understand why CDT goes wrong is to examine the MI log in this case. Can you share the MI log?
On Thu., Apr. 23, 2020, 11:55 Adrian Oltean wrote:
Hi everyone,
I’m currently experiencing some problems with regards to how CDT behaves
in the use case described in detail below. Looks like a 'continue' executed
via GDB's python API (see gdb.post_event(event)) somehow confuses Eclipse.
How to easily reproduce the problem:
1. Use an Ubuntu/Windows host;
2. Install Eclipse C/C++ 2019.12;
3. Create a C 'hello world' app for testing; add an infinite loop in 'main';
4. Build the app;
5. Create a python script (e.g. post_event.py) and paste the following code.
Make sure to properly indent it if it gets messed-up in this email;
import gdb
class CustomEvent(object):
def __init__(self, command):
self.command = command
def __call__(self):
print("Executing <%s>" % self.command)
gdb.execute(self.command, False, False)
counter = 0
def suspend_handler(event):
global counter
if counter % 2 == 0:
gdb.post_event(CustomEvent("continue"))
counter = counter + 1
# This is not part of the suspend_handler...
gdb.events.stop.connect(suspend_handler)
6. Start local debug; use GDB 8+ in all-stop mode;
7. Run the py script using the Debugger Console - 'source post_event.py';
8. Resume the app from 'main'
9. Suspend execution - note that a 'continue' will (eventually) be executed
from the script. We have two behaviors, depending on the host OS:
a. On Linux ('enhanced' console supported), Eclipse ends-up in a weird
state, Debug view showing the app suspended (with empty stack frames) whilst
the actual app is running. Suspend button is now disabled. If I try to resume,
I obviously get an error - 'selected thread is running';
b. On Windows (no 'enhanced' debugger console support, thus no mi-async,
nor target-sync enabled), suspend operation fails with 'operation timeout'. Things
get really messy if trying other operations afterwards.
10. Repeat steps 8 and 9 if problem not reproduced after the first attempt. Seems
to be more reliable on Linux hosts but consistently failing on Windows;
I'm mentioning the 'enhanced' console support because problems seem to be related
to how app/target is interrupted - '-exec-interrupt' vs. kill(SIGINT).
From my experiments, if I switch to non-stop mode GDB, behavior on Linux does not
change, whereas on Windows I no longer see any issues. But on Windows, my setup
involves an ARM-based target, a custom GDB server and JTAG debugging. On my
Ubuntu 18.04 I simply debug a host Linux app.
Anyone else seeing this? Any hints on how to make CDT properly deal with
'continue' executed from a gdb.post_event()?
Thank you,
Adrian
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