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-exec awatch triggers unknown exceptions #14031

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-exec awatch triggers unknown exceptions#14031
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@xspeed1989

Description

@xspeed1989
xspeed1989
opened on Nov 3, 2025

Environment

  • OS and version: Manjaro Linux 25
  • VS Code: 1.105.1
  • C/C++ extension: 1.28.3
  • OS and version of remote machine (if applicable): Windows 11 25H2
  • GDB / LLDB version: 16.3

Bug Summary and Steps to Reproduce

Bug Summary:

-exec awatch triggers unknown exceptions

#include <cstdio>
#include <string>
#include <windows.h>
int main(int argc, char *argv[]) {
    int a = 123;
    int b = a;
    a += 1;
    printf("Hello, World! %d\n", a);
}

Steps to reproduce:

  1. set breakpoint at line 6 then start debug windows exe
  2. -exec awatch a
  3. F10

Debugger Configurations

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${command:cmake.launchTargetPath}",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${fileDirname}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerServerAddress": "private:2345",
            "preLaunchTask": "deploy",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "Set Disassembly Flavor to Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ],
            "logging": {
                "engineLogging": true,
                "trace": true,
                "traceResponse": true
            }
        }
    ]
}

Debugger Logs

<--   C (next-18): {"command":"next","arguments":{"threadId":5148},"type":"request","seq":18}
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7966) <-1036-exec-next --thread 1 --frame 0 \n"},"seq":536}
1: (7966) <-1036-exec-next --thread 1 --frame 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7967) ->1036^running\n"},"seq":538}
1: (7967) ->1036^running
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7967) ->*running,thread-id=\"all\"\n"},"seq":540}
1: (7967) ->*running,thread-id="all"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7968) 1036: elapsed time 1\n"},"seq":542}
1: (7968) 1036: elapsed time 1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7970) ->(gdb)\n"},"seq":545}
1: (7970) ->(gdb)
--> R (next-18): {"type":"response","request_seq":18,"success":true,"command":"next","body":{},"seq":544}
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7971) ->=breakpoint-modified,bkpt={number=\"4\",type=\"acc watchpoint\",disp=\"keep\",enabled=\"y\",what=\"a\",thread-groups=[\"i1\"],times=\"1\",original-location=\"a\"}\n"},"seq":548}
1: (7971) ->=breakpoint-modified,bkpt={number="4",type="acc watchpoint",disp="keep",enabled="y",what="a",thread-groups=["i1"],times="1",original-location="a"}
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"\\n\"\n"},"seq":550}
1: (7974) ->~"\n"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"Thread 1 hit Hardware access (read/write) watchpoint 4: a\\n\"\n"},"seq":552}
1: (7974) ->~"Thread 1 hit Hardware access (read/write) watchpoint 4: a\n"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"\n"},"seq":553}

--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"\\n\"\n"},"seq":556}
1: (7974) ->~"\n"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"Thread 1 hit Hardware access (read/write) watchpoint 4: a\n"},"seq":559}
Thread 1 hit Hardware access (read/write) watchpoint 4: a
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"Value = 123\\n\"\n"},"seq":558}
1: (7974) ->~"Value = 123\n"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"\n"},"seq":562}

--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"0x00007ff670e3155e in main (argc=1, argv=0x7d90f0) at /home/allen/\\346\\241\\214\\351\\235\\242/test_cpp/main.cc:6\\n\"\n"},"seq":564}
1: (7974) ->~"0x00007ff670e3155e in main (argc=1, argv=0x7d90f0) at /home/allen/\346\241\214\351\235\242/test_cpp/main.cc:6\n"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"Value = 123\n"},"seq":566}
Value = 123
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->~\"6\\t    int b = a;\\n\"\n"},"seq":568}
1: (7974) ->~"6\t    int b = a;\n"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"0x00007ff670e3155e in main (argc=1, argv=0x7d90f0) at /home/allen/桌面/test_cpp/main.cc:6\n"},"seq":570}
0x00007ff670e3155e in main (argc=1, argv=0x7d90f0) at /home/allen/桌面/test_cpp/main.cc:6
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7974) ->*stopped,hw-awpt={number=\"4\",exp=\"a\"},reason=\"access-watchpoint-trigger\",value={new=\"123\"},frame={addr=\"0x00007ff670e3155e\",func=\"main\",args=[{name=\"argc\",value=\"1\"},{name=\"argv\",value=\"0x7d90f0\"}],file=\"/home/allen/\\346\\241\\214\\351\\235\\242/test_cpp/main.cc\",fullname=\"/home/allen/\\346\\241\\214\\351\\235\\242/test_cpp/main.cc\",line=\"6\",arch=\"i386:x86-64\"},thread-id=\"1\",stopped-threads=\"all\"\n"},"seq":572}
1: (7974) ->*stopped,hw-awpt={number="4",exp="a"},reason="access-watchpoint-trigger",value={new="123"},frame={addr="0x00007ff670e3155e",func="main",args=[{name="argc",value="1"},{name="argv",value="0x7d90f0"}],file="/home/allen/\346\241\214\351\235\242/test_cpp/main.cc",fullname="/home/allen/\346\241\214\351\235\242/test_cpp/main.cc",line="6",arch="i386:x86-64"},thread-id="1",stopped-threads="all"
--> E (output): {"type":"event","event":"output","body":{"category":"stdout","output":"6\t    int b = a;\n"},"seq":574}
6	    int b = a;
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7975) <-1037-stack-list-frames --thread 1 0 1000\n"},"seq":576}
1: (7975) <-1037-stack-list-frames --thread 1 0 1000
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7976) ->1037^done,stack=[frame={level=\"0\",addr=\"0x00007ff670e3155e\",func=\"main\",file=\"/home/allen/\\346\\241\\214\\351\\235\\242/test_cpp/main.cc\",fullname=\"/home/allen/\\346\\241\\214\\351\\235\\242/test_cpp/main.cc\",line=\"6\",arch=\"i386:x86-64\"}]\n"},"seq":578}
1: (7976) ->1037^done,stack=[frame={level="0",addr="0x00007ff670e3155e",func="main",file="/home/allen/\346\241\214\351\235\242/test_cpp/main.cc",fullname="/home/allen/\346\241\214\351\235\242/test_cpp/main.cc",line="6",arch="i386:x86-64"}]
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7976) ->(gdb)\n"},"seq":580}
1: (7976) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7976) 1037: elapsed time 0\n"},"seq":582}
1: (7976) 1037: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7977) <-1038-var-delete var1\n"},"seq":584}
1: (7977) <-1038-var-delete var1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7977) ->1038^done,ndeleted=\"1\"\n"},"seq":586}
1: (7977) ->1038^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7978) ->(gdb)\n"},"seq":588}
1: (7978) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7978) 1038: elapsed time 1\n"},"seq":590}
1: (7978) 1038: elapsed time 1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7979) <-1039-var-delete var2\n"},"seq":592}
1: (7979) <-1039-var-delete var2
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7979) ->1039^done,ndeleted=\"1\"\n"},"seq":594}
1: (7979) ->1039^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7979) ->(gdb)\n"},"seq":596}
1: (7979) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7979) 1039: elapsed time 0\n"},"seq":598}
1: (7979) 1039: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7979) <-1040-var-delete var3\n"},"seq":600}
1: (7979) <-1040-var-delete var3
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->1040^done,ndeleted=\"1\"\n"},"seq":602}
1: (7980) ->1040^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->(gdb)\n"},"seq":604}
1: (7980) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) 1040: elapsed time 0\n"},"seq":606}
1: (7980) 1040: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) <-1041-var-delete var4\n"},"seq":608}
1: (7980) <-1041-var-delete var4
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->1041^done,ndeleted=\"1\"\n"},"seq":610}
1: (7980) ->1041^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->(gdb)\n"},"seq":612}
1: (7980) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) 1041: elapsed time 0\n"},"seq":614}
1: (7980) 1041: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) <-1042-var-delete var5\n"},"seq":616}
1: (7980) <-1042-var-delete var5
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->1042^done,ndeleted=\"1\"\n"},"seq":618}
1: (7980) ->1042^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) ->(gdb)\n"},"seq":620}
1: (7980) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7980) 1042: elapsed time 0\n"},"seq":622}
1: (7980) 1042: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) <-1043-var-delete var6\n"},"seq":624}
1: (7981) <-1043-var-delete var6
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->1043^done,ndeleted=\"1\"\n"},"seq":626}
1: (7981) ->1043^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->(gdb)\n"},"seq":628}
1: (7981) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) 1043: elapsed time 0\n"},"seq":630}
1: (7981) 1043: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) <-1044-var-delete var7\n"},"seq":632}
1: (7981) <-1044-var-delete var7
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->1044^done,ndeleted=\"1\"\n"},"seq":634}
1: (7981) ->1044^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->(gdb)\n"},"seq":636}
1: (7981) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) 1044: elapsed time 0\n"},"seq":638}
1: (7981) 1044: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) <-1045-var-delete var8\n"},"seq":640}
1: (7981) <-1045-var-delete var8
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->1045^done,ndeleted=\"1\"\n"},"seq":642}
1: (7981) ->1045^done,ndeleted="1"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) ->(gdb)\n"},"seq":644}
1: (7981) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7981) 1045: elapsed time 0\n"},"seq":646}
1: (7981) 1045: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7982) Send Event AD7ExceptionEvent\n"},"seq":648}
1: (7982) Send Event AD7ExceptionEvent
--> E (stopped): {"type":"event","event":"stopped","body":{"reason":"exception","threadId":5148,"text":"Unknown stopping event","allThreadsStopped":true,"source":{"name":"main.cc","path":"/home/allen/桌面/test_cpp/main.cc","sources":[],"checksums":[]},"line":6,"column":1},"seq":650}
<--   C (threads-19): {"command":"threads","type":"request","seq":19}
--> R (threads-19): {"type":"response","request_seq":19,"success":true,"command":"threads","body":{"threads":[{"id":5148,"name":" [5148]"},{"id":4552,"name":" [4552]"}]},"seq":653}
<--   C (stackTrace-20): {"command":"stackTrace","arguments":{"threadId":5148,"startFrame":0,"levels":20},"type":"request","seq":20}
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7993) <-1046-stack-list-arguments --thread 1 2 0 0\n"},"seq":656}
1: (7993) <-1046-stack-list-arguments --thread 1 2 0 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7994) ->1046^done,stack-args=[frame={level=\"0\",args=[{name=\"argc\",type=\"int\",value=\"1\"},{name=\"argv\",type=\"char **\",value=\"0x7d90f0\"}]}]\n"},"seq":658}
1: (7994) ->1046^done,stack-args=[frame={level="0",args=[{name="argc",type="int",value="1"},{name="argv",type="char **",value="0x7d90f0"}]}]
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7994) ->(gdb)\n"},"seq":660}
1: (7994) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (7994) 1046: elapsed time 0\n"},"seq":662}
1: (7994) 1046: elapsed time 0
--> R (stackTrace-20): {"type":"response","request_seq":20,"success":true,"command":"stackTrace","body":{"stackFrames":[{"id":1000,"name":"main(int argc, char ** argv)","source":{"name":"main.cc","path":"/home/allen/桌面/test_cpp/main.cc","sources":[],"checksums":[]},"line":6,"column":1,"instructionPointerReference":"0x00007ff670e3155e"}],"totalFrames":1},"seq":664}
<--   C (scopes-21): {"command":"scopes","arguments":{"frameId":1000},"type":"request","seq":21}
--> R (scopes-21): {"type":"response","request_seq":21,"success":true,"command":"scopes","body":{"scopes":[{"presentationHint":"locals","name":"Locals","variablesReference":1000,"expensive":false},{"presentationHint":"registers","name":"Registers","variablesReference":1001,"expensive":true}]},"seq":667}
<--   C (variables-22): {"command":"variables","arguments":{"variablesReference":1000},"type":"request","seq":22}
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8416) <-1047-stack-list-variables --thread 1 --frame 0 0\n"},"seq":670}
1: (8416) <-1047-stack-list-variables --thread 1 --frame 0 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8417) ->1047^done,variables=[{name=\"argc\",arg=\"1\"},{name=\"argv\",arg=\"1\"},{name=\"a\"},{name=\"b\"}]\n"},"seq":672}
1: (8417) ->1047^done,variables=[{name="argc",arg="1"},{name="argv",arg="1"},{name="a"},{name="b"}]
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8417) ->(gdb)\n"},"seq":674}
1: (8417) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8417) 1047: elapsed time 1\n"},"seq":676}
1: (8417) 1047: elapsed time 1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8417) <-1048-var-create --thread 1 --frame 0  - * \"argc\"\n"},"seq":678}
1: (8417) <-1048-var-create --thread 1 --frame 0  - * "argc"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8418) ->1048^done,name=\"var9\",numchild=\"0\",value=\"1\",type=\"int\",thread-id=\"1\",has_more=\"0\"\n"},"seq":680}
1: (8418) ->1048^done,name="var9",numchild="0",value="1",type="int",thread-id="1",has_more="0"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8418) ->(gdb)\n"},"seq":682}
1: (8418) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8419) 1048: elapsed time 1\n"},"seq":684}
1: (8419) 1048: elapsed time 1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8419) <-1049-var-create --thread 1 --frame 0  - * \"argv\"\n"},"seq":686}
1: (8419) <-1049-var-create --thread 1 --frame 0  - * "argv"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8420) ->1049^done,name=\"var10\",numchild=\"1\",value=\"0x7d90f0\",type=\"char **\",thread-id=\"1\",has_more=\"0\"\n"},"seq":688}
1: (8420) ->1049^done,name="var10",numchild="1",value="0x7d90f0",type="char **",thread-id="1",has_more="0"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8420) ->(gdb)\n"},"seq":690}
1: (8420) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8420) 1049: elapsed time 0\n"},"seq":692}
1: (8420) 1049: elapsed time 0
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8420) <-1050-var-create --thread 1 --frame 0  - * \"a\"\n"},"seq":694}
1: (8420) <-1050-var-create --thread 1 --frame 0  - * "a"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8421) ->1050^done,name=\"var11\",numchild=\"0\",value=\"123\",type=\"int\",thread-id=\"1\",has_more=\"0\"\n"},"seq":696}
1: (8421) ->1050^done,name="var11",numchild="0",value="123",type="int",thread-id="1",has_more="0"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8421) ->(gdb)\n"},"seq":698}
1: (8421) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8421) 1050: elapsed time 1\n"},"seq":700}
1: (8421) 1050: elapsed time 1
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8421) <-1051-var-create --thread 1 --frame 0  - * \"b\"\n"},"seq":702}
1: (8421) <-1051-var-create --thread 1 --frame 0  - * "b"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8422) ->1051^done,name=\"var12\",numchild=\"0\",value=\"1893982384\",type=\"int\",thread-id=\"1\",has_more=\"0\"\n"},"seq":704}
1: (8422) ->1051^done,name="var12",numchild="0",value="1893982384",type="int",thread-id="1",has_more="0"
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8422) ->(gdb)\n"},"seq":706}
1: (8422) ->(gdb)
--> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (8422) 1051: elapsed time 0\n"},"seq":708}
1: (8422) 1051: elapsed time 0
--> R (variables-22): {"type":"response","request_seq":22,"success":true,"command":"variables","body":{"variables":[{"name":"a","value":"123","type":"int","evaluateName":"a","variablesReference":0,"memoryReference":"0x000000000000007b"},{"name":"b","value":"1893982384","type":"int","evaluateName":"b","variablesReference":0,"memoryReference":"0x0000000070e3e0b0"},{"name":"argc","value":"1","type":"int","evaluateName":"argc","variablesReference":0,"memoryReference":"0x0000000000000001"},{"name":"argv","value":"0x7d90f0","type":"char **","evaluateName":"argv","variablesReference":1002,"memoryReference":"0x00000000007d90f0"}]},"seq":710}

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