SYNOPSIS: using -pg with cc results in segfault
CATEGORY: system
ENVIRONMENT:
System : OpenBSD 7.4
Details : OpenBSD 7.4-current (GENERIC) #1399: Wed Nov 22
08:12:44 MST 2023
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
Architecture: OpenBSD.amd64
Machine : amd64
DESCRIPTION:
Is gprof and related compiler switches expected to work?
Or, in reading the backtrace, is there an issue with issetugid?
Or, is this some syscall issue (see end of dmesg)?
HOW-TO-REPEAT:
$ cat m.c
#include <stdio.h>
#include <math.h>
int
main() {
printf("m.c PI is %f\n", M_PI);
}
$ cc -o m.x m.c -lm
$ ./m.x
m.c PI is 3.141593
$ cc -o m.x -pg m.c -lm
$ ./m.x
Segmentation fault
$ egdb -se=m.x
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Reading symbols from m.x...
(gdb) run
Starting program: /home/j/rnums/m.x
Program received signal SIGSEGV, Segmentation fault.
issetugid () at /tmp/-:2
2 /tmp/-: No such file or directory.
(gdb) bt
#0 issetugid () at /tmp/-:2
#1 0xedb40a3fe8c37d01 in ?? ()
#2 0x0000000000217b1c in _libc_preinit (argc=<optimized out>,
argv=<optimized out>, envp=<optimized out>, cb=0x2a1f7bd10
<_dl_cb_cb>)
at /usr/src/lib/libc/dlfcn/init.c:128
#3 0x00000002a1f77658 in _dl_call_preinit (object=0x23c006000)
at /usr/src/libexec/ld.so/loader.c:812
#4 _dl_boot (argv=0x71f26696af68, envp=<optimized out>,
dyn_loff=11307266048,
dl_data=0x71f26696aed0) at /usr/src/libexec/ld.so/loader.c:729
#5 0x00000002a1f76366 in _dl_start () at
/usr/src/libexec/ld.so/amd64/ldasm.S:61
#6 0x0000000000000000 in ?? ()
(gdb)
dmesg:
OpenBSD 7.4-current (GENERIC) #1399: Wed Nov 22 08:12:44 MST 2023
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
real mem = 8573091840 (8175MB)
avail mem = 8293748736 (7909MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.5 @ 0xe1000 (10 entries)
bios0: vendor innotek GmbH version "VirtualBox" date 12/01/2006
bios0: innotek GmbH VirtualBox
acpi0 at bios0: ACPI 4.0
acpi0: sleep states S0 S5
acpi0: tables DSDT FACP APIC SSDT
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Ryzen 7 PRO 3700 8-Core Processor, 3600.21 MHz, 17-71-00,
patch 06000626
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLU
SH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSA
VE,AVX,RDRAND,NXE,MMXX,FFXSR,RDTSCP,LONG,LAHF,CMPLEG,SVM,AMCR8,ABM,SSE4A,MASSE,3DN
OWP,ITSC,FSGSBASE,AVX2,RDSEED,CLFLUSHOPT,SSBDNR
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache
cpu0: 512KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: CPU supports MTRRs but not enabled by BIOS
cpu0: apic clock running at 1000MHz
cpu at mainbus0: not configured
cpu at mainbus0: not configured
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 20, 24 pins, remapped
acpiprt0 at acpi0: bus 0 (PCI0)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpiac0 at acpi0: AC unit online
acpicpu0 at acpi0: C1(@1 halt!)
acpivideo0 at acpi0: GFX0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82441FX" rev 0x02
pcib0 at pci0 dev 1 function 0 "Intel 82371SB ISA" rev 0x00
pciide0 at pci0 dev 1 function 1 "Intel 82371AB IDE" rev 0x01: DMA,
channel 0 conf
igured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <VBOX HARDDISK>
wd0: 128-sector PIO, LBA, 97642MB, 199970816 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
pciide0: channel 1 disabled (no drives)
vga1 at pci0 dev 2 function 0 "VMware SVGA II" rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
em0 at pci0 dev 3 function 0 "Intel 82540EM" rev 0x02: apic 4 int 19,
address 08:0
0:27:9a:72:5e
"InnoTek Guest Service" rev 0x00 at pci0 dev 4 function 0 not configured
auich0 at pci0 dev 5 function 0 "Intel 82801AA AC97" rev 0x01: apic 4
int 21, ICH ac97: codec id 0x83847600 (SigmaTel STAC9700)
audio0 at auich0
ohci0 at pci0 dev 6 function 0 "Apple Intrepid USB" rev 0x00: apic 4 int
22, versi
on 1.0
piixpm0 at pci0 dev 7 function 0 "Intel 82371AB Power" rev 0x08: apic 4
int 23
iic0 at piixpm0
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
usb0 at ohci0: USB revision 1.0
uhub0 at usb0 configuration 1 interface 0 "Apple OHCI root hub" rev
1.00/1.00 addr 1
vmm0 at mainbus0: unknown
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
root on wd0a (5c16da051bcc7251.a) swap on wd0b dump on wd0b
WARNING: /mnt was not properly unmounted
...snip...various bogus syscall complaints for other programs.....
[m.x]52763/119602 pc=21def6 inside 2e068a000-2e0695fff: bogus syscall
[m.x]57870/52895 pc=21def6 inside 2a1f78000-2a1f83fff: bogus syscall
[m.x]37732/225490 pc=21def6 inside 297ed1000-297edcfff: bogus syscall
[m.x]54999/307977 pc=21def6 inside 2a12f6000-2a1301fff: bogus syscall
