dump_syms - SIGSEGV - MIPS

[arunc]

Hi Team,

I'm trying to use the breakpad on the MIPS platform. I'm facing an a SIGSEGV while executing dump_syms

Could you please help here to fix this issue? Thanks in advance!

Code:

/google-breakpad/breakpad_exercise$ cat breakpad_exercise.c
#include <stdio.h>
#include "../src/client/linux/handler/exception_handler.h"

static bool breakpadDumpCallback(const google_breakpad::MinidumpDescriptor&descriptor,void * context,bool succeeded){
printf("\n-------------->a crah !!!!\n");
return succeeded;
}

void crash()
{
char* a = NULL;
*a = 'A';
printf("Hello char:%s\n", a);
}

int main() {
static google_breakpad::ExceptionHandler* excHandler = NULL;
excHandler = new google_breakpad::ExceptionHandler(google_breakpad::MinidumpDescriptor("./"),NULL,breakpadDumpCallback,NULL,true,-1);

printf("Hello, World!\n");
crash();

return 0;
}

make : breakpad_exercise.c -o breakpad_exercise -lbreakpad_client -lpthread -g

MIPS cross compiled bin:

google-breakpad/breakpad_exercise$ file breakpad_exercise
breakpad_exercise: ELF 32-bit MSB executable, MIPS, MIPS-I version 1 (SYSV), dynamically linked, interpreter /lib/ld-uClibc.so.0, BuildID[sha1]=94a2d491f868485cd7697d9a7af6e731428f9451, with debug_info, not stripped

Run on Board:

the above bin was running fine on the board and it catches the segfault and produced the minidump as well

# ./breakpad_exercise & # Hello, World! -------------->a crah !!!! [1]+ Segmentation fault ./breakpad_exercisedump:12024 Nov 21 21:37 63955280-4dd1-4062-58f09393-22af61de.dmp

Backtrace:

crash while  producing the text-format symbols.

google-breakpad/breakpad_exercise$ gdb --args ../src/tools/linux/dump_syms/dump_syms breakpad_exercise

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Reading symbols from ../src/tools/linux/dump_syms/dump_syms...
(gdb) run
Starting program: /home/wio/project/nw/tools/google-breakpad/src/tools/linux/dump_syms/dump_syms breakpad_exercise

Program received signal SIGSEGV, Segmentation fault.
0x000055555558a369 in google_breakpad::(anonymous namespace)::FindElfClassSegment<google_breakpad::ElfClass32> (segments=0x7fffffffd6c0, segment_type=4,
    elf_base=0x7ffff791e000 "\177ELF\001\002\001") at src/common/linux/elfutils.cc:102
102  for (int i = 0; i < elf_header->e_phnum; ++i) {
(gdb) bt
#0  0x000055555558a369 in google_breakpad::(anonymous namespace)::FindElfClassSegment<google_breakpad::ElfClass32> (segments=0x7fffffffd6c0, segment_type=4,
    elf_base=0x7ffff791e000 "\177ELF\001\002\001") at src/common/linux/elfutils.cc:102
#1  google_breakpad::FindElfSegments (elf_mapped_base=elf_mapped_base@entry=0x7ffff791e000, segment_type=segment_type@entry=4, segments=segments@entry=0x7fffffffd6c0)
    at src/common/linux/elfutils.cc:172
#2  0x000055555558ac0d in google_breakpad::FindElfBuildIDNote (identifier=..., elf_mapped_base=0x7ffff791e000) at src/common/linux/file_id.cc:101
#3  google_breakpad::FileID::ElfFileIdentifierFromMappedFile (base=base@entry=0x7ffff791e000, identifier=...) at src/common/linux/file_id.cc:150
#4  0x0000555555582ec9 in (anonymous namespace)::InitModuleForElfClass<google_breakpad::ElfClass32> (elf_header=0x7ffff791e000, obj_filename="breakpad_exercise", obj_os="Linux",
    module=...) at /usr/include/c++/9/ext/new_allocator.h:89
#5  0x0000555555587ef8 in (anonymous namespace)::ReadSymbolDataElfClass<google_breakpad::ElfClass32> (out_module=0x7fffffffdcb0, options=...,
    debug_dirs=std::vector of length 0, capacity 0, obj_os="Linux", obj_filename="breakpad_exercise", elf_header=0x7ffff791e000) at ./src/common/scoped_ptr.h:92
#6  google_breakpad::ReadSymbolDataInternal (obj_file=0x7ffff791e000 "\177ELF\001\002\001", obj_filename="breakpad_exercise", obj_os="Linux",
    debug_dirs=std::vector of length 0, capacity 0, options=..., module=0x7fffffffdcb0) at src/common/linux/dump_symbols.cc:1053
#7  0x00005555555889c1 in google_breakpad::ReadSymbolData (load_path=..., obj_file="breakpad_exercise", obj_os="Linux", debug_dirs=std::vector of length 0, capacity 0, options=...,
    module=0x7fffffffdcb0) at src/common/linux/dump_symbols.cc:1136
#8  0x0000555555588a0a in google_breakpad::WriteSymbolFile (load_path=..., obj_file=..., obj_os=..., debug_dirs=..., options=..., sym_stream=...)
    at src/common/linux/dump_symbols.cc:1073
#9  0x000055555555d7b1 in main (argc=<optimized out>, argv=<optimized out>) at /usr/include/c++/9/ext/new_allocator.h:80
(gdb)

host machine;

breakpad_exercise$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal

 Thanks,

AC

[arunc]

Hi Team,

I see a another conversation for the same issue, but not sure the final conclusion

https://groups.google.com/g/google-breakpad-discuss/c/6i7oCk2MgEU/m/CsfXdhws2iQJ

[arunc]

Hi Team,

Could anyone please help on this issue?