Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Segment fault related to strlen.S
Top Forums Programming Segment fault related to strlen.S Post 302968007 by yifangt on Wednesday 2nd of March 2016 10:44:10 AM
Old 03-02-2016
Segment fault related to strlen.S
Hello,
This function was copied into my code, which was compiled without error/warning, but when executed there is always Segmentation fault at the end after the output (which seems correct!):
Code:
void get_hashes(unsigned int hash[],  unsigned char *in)
{
    unsigned char *str = in;
    int pos = strlen((char *) in);    //This line is of problem!
    hash[0] = RSHash(str, pos);
    hash[1] = DJBHash(str, pos);
    hash[2] = FNVHash(str, pos);
    hash[3] = JSHash(str, pos);
    hash[4] = PJWHash(str, pos);
    hash[5] = SDBMHash(str, pos);
    hash[6] = DEKHash(str, pos);
    hash[7] = murmur(str, (uint64_t) pos, (uint64_t) pos);
}

Then I used gdb to debug, and I got this message:
Code:
Program received signal SIGSEGV, Segmentation fault.
strlen () at ../sysdeps/x86_64/strlen.S:106
106    ../sysdeps/x86_64/strlen.S: No such file or directory.

The problem line has been highlighted. Code for the whole program is attached. I used type cast to suppress the warnings at compiling without full understanding.
Can someone explain the error for me, and show me the correct fix?
Thanks a lot!
bitwiser04.txt (13.7 KB) 
 

10 More Discussions You Might Find Interesting

1. Programming

Problems with Strlen

hello, i have a problem with strlen. I have written this: for(y=13,z=0; cInBuf!=' ';y++) { cBuf=cInBuf; z++; } len = strlen(cBuf); out=len/2; fprintf(outfile,"F%i",out); If strlen is e.g. 22, it write F22. I want to write F2F2. How can i do this?... (5 Replies)
Discussion started by: ACeD
5 Replies

2. Shell Programming and Scripting

Problem with the strlen function in ksh

Hello, Just a little problem with the ksh function : strlen I want to use this function in this little ksh program : while read line ; do TOTO=$line TOTONB=strlen($TOTO) echo $TOTONB (3 Replies)
Discussion started by: steiner
3 Replies

3. Programming

Segment Fault

When run it, segment fault. What is wrong? #include <stdio.h> #include <stdlib.h> const int max =20; //**************************************************** // Input Matrix //**************************************************** void inMatrixAA(int *AA, int row, int col)... (9 Replies)
Discussion started by: zhshqzyc
9 Replies

4. Programming

'strlen' of a constant string

In a declaration, I have: const char comment_begin = "<!--"; const char comment_end = "-->"; const int comment_begin_len = strlen(comment_begin); const int comment_end_len = strlen(comment_end); When I compile, I get the warnings: emhttpc.c:64: warning: initializer element is not... (10 Replies)
Discussion started by: cleopard
10 Replies

5. Programming

a strange segment fault about ltp-posix test

Hi all In the ltp-posix test,there is a case in open_posix_testsuite\conformance\interfaces\timer_gettime\speculative/6-1.c I run the above code,it will has a segment fault, if I modify it to below,it works well Anybody can tell me why? (1 Reply)
Discussion started by: yanglei_fage
1 Replies

6. Programming

strlen for UTF-8

My OS (Debian) and gcc use the UTF-8 locale. This code says that the char size is 1 byte but the size of 'a' is really 4 bytes. int main(void) { setlocale(LC_ALL, "en_US.UTF-8"); printf("Char size: %i\nSize of char 'a': %i\nSize of Euro sign '€': %i\nLength of Euro sign: %i\n",... (8 Replies)
Discussion started by: cyler
8 Replies

7. Programming

Data segment or Text segment

Hi, Whether the following piece of code is placed in the read-only memory of code (text) segment or data segment? char *a = "Hello"; I am getting two different answers while searching in google :( that's why the confusion is (7 Replies)
Discussion started by: royalibrahim
7 Replies

8. Programming

why segment fault,

I always get segment fault, why? can sb help me and modify it, I have spend on much time on #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <sys/time.h> #include <string.h> #define MAX 10 pthread_t thread; void *thread1() { int *a; int i, n; ... (1 Reply)
Discussion started by: yanglei_fage
1 Replies

9. Programming

Segment-fault handling for pthreads

Hi I have struggling a week to fix a program , in the begining i got SIGBUS , but after many attempts still the program gets SIGSEGV segment fault , In bellow i post the seg fault log + source codes. would really appreciate if experts help me to fix this segment fault error. any advice is... (2 Replies)
Discussion started by: pooyair
2 Replies

10. Programming

Segment fault for C++ program when return vector

I am trying to reverse complement DNA sequence (string) with a short c++ code using boost library. Code was compiled without any warning/error, but ran into Segmentation fault. My guess is the function to return a vector, but not sure. #include <iostream> #include <fstream> #include <string>... (14 Replies)
Discussion started by: yifangt
14 Replies

LEARN ABOUT FREEBSD

dwarf_get_ds_name

DWARF_GET_AT_NAME(3)					   BSD Library Functions Manual 				      DWARF_GET_AT_NAME(3)

NAME

     dwarf_get_ACCESS_name, dwarf_get_AT_name, dwarf_get_ATE_name, dwarf_get_CC_name, dwarf_get_CFA_name, dwarf_get_CHILDREN_name,
     dwarf_get_DS_name, dwarf_get_DSC_name, dwarf_get_EH_name, dwarf_get_END_name, dwarf_get_FORM_name, dwarf_get_ID_name, dwarf_get_INL_name,
     dwarf_get_LANG_name, dwarf_get_LNE_name, dwarf_get_LNS_name, dwarf_get_MACINFO_name, dwarf_get_OP_name, dwarf_get_ORD_name,
     dwarf_get_TAG_name, dwarf_get_VIRTUALITY_name, dwarf_get_VIS_name -- retrieve the symbolic names of DWARF constants

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_ACCESS_name(unsigned val, char **str);

     int
     dwarf_get_AT_name(unsigned val, char **str);

     int
     dwarf_get_ATE_name(unsigned val, char **str);

     int
     dwarf_get_CC_name(unsigned val, char **str);

     int
     dwarf_get_CFA_name(unsigned val, char **str);

     int
     dwarf_get_CHILDREN_name(unsigned val, char **str);

     int
     dwarf_get_DS_name(unsigned val, char **str);

     int
     dwarf_get_DSC_name(unsigned val, char **str);

     int
     dwarf_get_EH_name(unsigned val, char **str);

     int
     dwarf_get_END_name(unsigned val, char **str);

     int
     dwarf_get_FORM_name(unsigned val, char **str);

     int
     dwarf_get_ID_name(unsigned val, char **str);

     int
     dwarf_get_INL_name(unsigned val, char **str);

     int
     dwarf_get_LANG_name(unsigned val, char **str);

     int
     dwarf_get_LNE_name(unsigned val, char **str);

     int
     dwarf_get_LNS_name(unsigned val, char **str);

     int
     dwarf_get_MACINFO_name(unsigned val, char **str);

     int
     dwarf_get_OP_name(unsigned val, char **str);

     int
     dwarf_get_ORD_name(unsigned val, char **str);

     int
     dwarf_get_TAG_name(unsigned val, char **str);

     int
     dwarf_get_VIRTUALITY_name(unsigned val, char **str);

     int
     dwarf_get_VIS_name(unsigned val, char **str);

DESCRIPTION

     These functions return the symbolic name of a numeric DWARF constant.

     Argument val specifies the numeric value whose symbolic name is desired.

     Argument str should point to a location which will hold the returned NUL-terminated string containing the symbolic name of the specified
     value.

     The list of functions and the DWARF constants that they accept are:

     dwarf_get_ACCESS_name()	  DW_ACCESS_* constants.
     dwarf_get_AT_name()	  DW_AT_* constants.
     dwarf_get_ATE_name()	  DW_ATE_* constants.
     dwarf_get_CC_name()	  DW_CC_* constants.
     dwarf_get_CFA_name()	  DW_CFA_* constants.
     dwarf_get_CHILDREN_name()	  DW_CHILDREN_* constants.
     dwarf_get_DS_name()	  DW_DS_* constants.
     dwarf_get_DSC_name()	  DW_DSC_* constants.
     dwarf_get_EH_name()	  DW_EH_PE_* constants.
     dwarf_get_END_name()	  DW_END_* constants.
     dwarf_get_FORM_name()	  DW_FORM_* constants.
     dwarf_get_ID_name()	  DW_ID_* constants.
     dwarf_get_INL_name()	  DW_INL_* constants.
     dwarf_get_LANG_name()	  DW_LANG_* constants.
     dwarf_get_LNE_name()	  DW_LNE_* constants.
     dwarf_get_LNS_name()	  DW_LNS_* constants.
     dwarf_get_MACINFO_name()	  DW_MACINFO_* constants.
     dwarf_get_OP_name()	  DW_OP_* constants.
     dwarf_get_ORD_name()	  DW_ORD_* constants.
     dwarf_get_TAG_name()	  DW_TAG_* constants.
     dwarf_get_VIRTUALITY_name()  DW_VIRTUALITY_* constants.
     dwarf_get_VIS_name()	  DW_VIS_* constants.

RETURN VALUES

     These functions return DW_DLV_OK on success. If the DWARF constant denoted by argument val is not recognized, these function return
     DW_DLV_NO_ENTRY.

SEE ALSO

     dwarf(3)

BSD
								  April 22, 2011							       BSD
All times are GMT -4. The time now is 01:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy