Re: gdb segfaults setting breakpoint on a Rust test

[Luke A. Call]

Thank you!

On 2023-03-24 14:10:50-0600, Todd C. Miller  wrote:
> On Fri, 24 Mar 2023 13:10:08 -0600, "Luke A. Call" wrote:
> 
> > Hi.  When I run this on the binary of a test in my Rust
> > application, then run these commands in gdb, I get the following output
> > which ends with Segmentation Fault:
> 
> The in-tree gdb is old, you should try the egdb package instead.
> 
>  - todd
> 

Re: gdb segfaults setting breakpoint on a Rust test

[Todd C . Miller]

On Fri, 24 Mar 2023 13:10:08 -0600, "Luke A. Call" wrote:

> Hi.  When I run this on the binary of a test in my Rust
> application, then run these commands in gdb, I get the following output
> which ends with Segmentation Fault:

The in-tree gdb is old, you should try the egdb package instead.

 - todd

gdb segfaults setting breakpoint on a Rust test

[Luke A. Call]

Hi.  When I run this on the binary of a test in my Rust
application, then run these commands in gdb, I get the following output
which ends with Segmentation Fault:


nemodel-ac769fda48f1a333
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "amd64-unknown-openbsd7.2"...
(gdb) start
Breakpoint 1 at 0x30f9e4
Starting program:
/home/lacall/proj/om/core/target/debug/deps/onemodel-ac769fda48f1a333 
Breakpoint 1 at 0xb6d041be9e4
Error while reading shared library symbols:
Dwarf Error: wrong version in compilation unit header (is 4, should be
2) [in module /usr/libexec/ld.so]
0x0b6d041be9e4 in main () from
/home/lacall/proj/om/core/target/debug/deps/onemodel-ac769fda48f1a333
(gdb) dir /home/lacall/proj/om/core/src/
Source directories searched: /home/lacall/proj/om/core/src:$cdir:$cwd
(gdb) dir /home/lacall/proj/om/core/src/model
Source directories searched:
/home/lacall/proj/om/core/src/model:/home/lacall/proj/om/core/src:$cdir:$cwd
(gdb) dir /home/lacall/proj/om/core/src/controllers 
Source directories searched:
/home/lacall/proj/om/core/src/controllers:/home/lacall/proj/om/core/src/model:/home/lacall/proj/om/core/src:$cdir:$cwd
(gdb) b util.rs:1057
Segmentation fault
@:~/<...>/target/debug/deps
$

I'm on obsd 7.2 stable and am not a C programmer, unfortunately.

If, prior to setting the breakpoint, I just do the "run" command, it
successfully runs the test to completion (which shows an intentional 
test failure for now).

Luke Call

Here is /var/run/dmesg.boot (dmesg itself is just messages about my
usb mouse attaching/detaching).

uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
wsmouse0 detached
ums0 detached
uhidev0 detached
uhidev0 at uhub0 port 4 configuration 1 interface 0 "Logitech USB Optical 
Mouse" rev 2.00/72.00 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
wsmouse0 detached
ums0 detached
uhidev0 detached
uhidev0 at uhub0 port 4 configuration 1 interface 0 "Logitech USB Optical 
Mouse" rev 2.00/72.00 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
syncing disks... done
OpenBSD 7.2 (GENERIC.MP) #7: Sat Feb 25 14:07:58 MST 2023

r...@syspatch-72-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 16029159424 (15286MB)
avail mem = 15525961728 (14806MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xebf90 (49 entries)
bios0: vendor American Megatrends Inc. version "204" date 11/20/2014
bios0: ASUSTeK COMPUTER INC. X550ZA
acpi0 at bios0: ACPI 5.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT ECDT MCFG MSDM HPET UEFI SSDT SSDT CRAT SSDT 
SSDT SSDT SSDT
acpi0: wakeup devices LOM_(S4) SBAZ(S4) ECIR(S4) OHC1(S4) EHC1(S4) OHC2(S4) 
EHC2(S4) OHC3(S4) EHC3(S4) OHC4(S4) XHC0(S4) XHC1(S4) ODD8(S3) GLAN(S4) 
LID_(S5) SLPB(S4)
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee0: PC-AT compat
cpu0 at mainbus0: apid 16 (boot processor)
cpu0: AMD A10-7400P Radeon R6, 10 Compute Cores 4C+6G, 2496.19 MHz, 15-30-01
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,XOP,SKINIT,WDT,FMA4,TCE,NODEID,TBM,CPCTR,DBKP,PERFTSC,ITSC,FSGSBASE,BMI1,XSAVEOPT
cpu0: 16KB 64b/line 4-way D-cache, 96KB 64b/line 3-way I-cache
cpu0: 2MB 64b/line 16-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, IBE
cpu1 at mainbus0: apid 17 (application processor)
cpu1: AMD A10-7400P Radeon R6, 10 Compute Cores 4C+6G, 2495.35 MHz, 15-30-01
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,XOP,SKINIT,WDT,FMA4,TCE,NODEID,TBM,CPCTR,DBKP,PERFTSC,ITSC,FSGSBASE,BMI1,XSAVEOPT
cpu1: 16KB 64b/line 4-way D-cache, 96KB 64b/line 3-way I-cache
cpu1: 2MB 64b/line 16-way L2 cache
cpu1: smt 1, core 0, package 0
cpu2 at mainbus0: apid 18 (application processor)
cpu2: AMD A10-7400P Radeon R6, 10 Compute Cores 4C+6G, 2495.35 MHz, 15-30-01
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,L