Server crashed when run the program on armv5 board?

[wufengyi]

Recently,I want to port iperf3 to armv5 board,But when I run the program ,It crashed(the error message is Segmentation fault).

After I investigate this problem using core dumped and arm-linux-objdump,I find that this arm assembly command cause the problem:

815c: e7961002 ldr r1, [r6, r2]

Below is the function which lead to the crash and corresponding arm assembly code:

iprintf(test, report_bw_format, sp->socket, st, et, ubuf, nbuf, irp->omitted?report_omitted:"");

8134: e59a303c ldr r3, [sl, #60]
8138: e59b000c ldr r0, [fp, #12]
813c: e3530000 cmp r3, #0 ; 0x0
8140: 0a000042 beq 8250 <iperf_print_intermediate+0x540>
8144: e59f3488 ldr r3, [pc, #1160] ; 85d4 <iperf_print_intermediate+0x8c4>
8148: e59d6050 ldr r6, [sp, #80]
814c: e796e003 ldr lr, [r6, r3]
8150: e59f243c ldr r2, [pc, #1084] ; 8594 <iperf_print_intermediate+0x884>
8154: e59d6050 ldr r6, [sp, #80]
8158: e59dc074 ldr ip, [sp, #116]
815c: e7961002 ldr r1, [r6, r2]
8160: e59d3070 ldr r3, [sp, #112]
8164: e1a02000 mov r2, r0
8168: e1a00009 mov r0, r9
816c: e98d0030 stmib sp, {r4, r5}
8170: e58d800c str r8, [sp, #12]
8174: e58d7010 str r7, [sp, #16]
8178: e58de014 str lr, [sp, #20]
817c: e58dc000 str ip, [sp]
8180: ebfff258 bl 4ae8 <_init+0x608>
8184: eaffff75 b 7f60 <iperf_print_intermediate+0x250>
So,can anyone kindly tell me what is wrong with this c function?

[HelioCampos]

Hi Wu,

• The header format for the function iprintf is the following:

iprintf(struct iperf_test test, const char format, ...)

Where:
iperf_test: structure describing deveral options you passed. Including
the "role" with says if you are running as a client "c" or as a sender "s".
format: is an array of chars definning the format of the list of
variables defined after it. It seems the all the variables defined after
the format should has the same type.

• I recomend you to put a printf before the line "iprintf(test,
  report_bw_format, sp->socket, st, et, ubuf, nbuf,
  irp->omitted?report_omitted:"");", see the values passed and make sure all
  types are the same for sp->socket, st, et, ubuf, nbuf, and
  irp->omitted?report_omitted:"".
• If all the types are correct, there could be a problem with iprintf and
  it is necessary do debug it more.
• It would help if you pass the arguments you are passing as well all
  version of OS and hardware.

2016-03-10 2:45 GMT-03:00 wu notifications@github.com:

Recently,I want to port iperf3 to armv5 board,But when I run the program
,It crashed(the error message is Segmentation fault).

After I investigate this problem using core dumped and arm-linux-objdump,I
find that this arm assembly command cause the problem:

815c: e7961002 ldr r1, [r6, r2]

Below is the function which lead to the crash and corresponding arm
assembly code:

iprintf(test, report_bw_format, sp->socket, st, et, ubuf, nbuf,
irp->omitted?report_omitted:"");

8134: e59a303c ldr r3, [sl, #60 https://github.com//issues/60
]
8138: e59b000c ldr r0, [fp, #12 https://github.com//issues/12
]
813c: e3530000 cmp r3, #0 ; 0x0
8140: 0a000042 beq 8250
8144: e59f3488 ldr r3, [pc, #1160] ; 85d4
8148: e59d6050 ldr r6, [sp, #80 https://github.com//issues/80
]
814c: e796e003 ldr lr, [r6, r3]
8150: e59f243c ldr r2, [pc, #1084] ; 8594
8154: e59d6050 ldr r6, [sp, #80 https://github.com//issues/80
]
8158: e59dc074 ldr ip, [sp, #116
https://github.com//issues/116]
815c: e7961002 ldr r1, [r6, r2]
8160: e59d3070 ldr r3, [sp, #112
https://github.com//issues/112]
8164: e1a02000 mov r2, r0
8168: e1a00009 mov r0, r9
816c: e98d0030 stmib sp, {r4, r5}
8170: e58d800c str r8, [sp, #12 https://github.com//issues/12
]
8174: e58d7010 str r7, [sp, #16 https://github.com//issues/16
]
8178: e58de014 str lr, [sp, #20 https://github.com//issues/20
]
817c: e58dc000 str ip, [sp]
8180: ebfff258 bl 4ae8 <_init+0x608>
8184: eaffff75 b 7f60
So,can anyone kindly tell me what is wrong with this c function?

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Helio Campos Mello de Andrade
Administrador de sistemas/Infraestrutura

mobile: +55 11 969292828
desk: +55 11 30482927
skype: heliocamposmello
helio.andrade@titansgroup.com.br

[bmah888]

Not sure if there's a bug here...???...

[bmah888]

Timeout due to inactivity and lack of additional information. Closing.