* Group section
@ 2017-03-21 19:39 SASHA NICOLAS DA ROCHA PINHEIRO
2017-03-21 19:53 ` Josh Stone
0 siblings, 1 reply; 4+ messages in thread
From: SASHA NICOLAS DA ROCHA PINHEIRO @ 2017-03-21 19:39 UTC (permalink / raw)
To: jistone, elfutils-devel
Hi Josh
I am getting error on the following code, and it looks like to be related to group sections.
As you can see I changed the dwarf_elf_init to dwarf_begin_elf, but passed NULL on the third parameter.
Do you know how should I actually deal with it?
91 bool DwarfHandle::init_dbg()
92 {
93 //int status;
94 //Dwarf_Error err;
95 if (init_dwarf_status == dwarf_status_ok) {
96 return true;
97 }
98
99 if (init_dwarf_status == dwarf_status_error) {
100 return false;
101 }
102
103 //status = dwarf_elf_init(file->e_elfp(), DW_DLC_READ,
104 // err_func, &file_data, &file_data, &err);
105
106 file_data = dwarf_begin_elf(file->e_elfp(), DWARF_C_READ, NULL);
107 cerr << "Error message:" << dwarf_errmsg(-1) << endl;
108 if (!file_data) {
109 init_dwarf_status = dwarf_status_error;
110 return false;
111 }
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Group section
2017-03-21 19:39 Group section SASHA NICOLAS DA ROCHA PINHEIRO
@ 2017-03-21 19:53 ` Josh Stone
2017-03-21 20:46 ` SASHA NICOLAS DA ROCHA PINHEIRO
0 siblings, 1 reply; 4+ messages in thread
From: Josh Stone @ 2017-03-21 19:53 UTC (permalink / raw)
To: SASHA NICOLAS DA ROCHA PINHEIRO, elfutils-devel
On 03/21/2017 12:38 PM, SASHA NICOLAS DA ROCHA PINHEIRO wrote:
>
> Hi Josh
> I am getting error on the following code, and it looks like to be related to group sections.
What is the error?
> As you can see I changed the dwarf_elf_init to dwarf_begin_elf, but passed NULL on the third parameter.
> Do you know how should I actually deal with it?
>
> 91 bool DwarfHandle::init_dbg()
> 92 {
> 93 //int status;
> 94 //Dwarf_Error err;
> 95 if (init_dwarf_status == dwarf_status_ok) {
> 96 return true;
> 97 }
> 98
> 99 if (init_dwarf_status == dwarf_status_error) {
> 100 return false;
> 101 }
> 102
> 103 //status = dwarf_elf_init(file->e_elfp(), DW_DLC_READ,
> 104 // err_func, &file_data, &file_data, &err);
> 105
> 106 file_data = dwarf_begin_elf(file->e_elfp(), DWARF_C_READ, NULL);
> 107 cerr << "Error message:" << dwarf_errmsg(-1) << endl;
> 108 if (!file_data) {
> 109 init_dwarf_status = dwarf_status_error;
> 110 return false;
> 111 }
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Group section
2017-03-21 19:53 ` Josh Stone
@ 2017-03-21 20:46 ` SASHA NICOLAS DA ROCHA PINHEIRO
2017-03-21 21:24 ` Mark Wielaard
0 siblings, 1 reply; 4+ messages in thread
From: SASHA NICOLAS DA ROCHA PINHEIRO @ 2017-03-21 20:46 UTC (permalink / raw)
To: Josh Stone, elfutils-devel
That's the problem. It says "no error" once, in another call it says "no reference value", and in another call "no DWARF information".
De: Josh Stone <jistone@redhat.com>
Enviado: terça-feira, 21 de março de 2017 14:53:12
Para: SASHA NICOLAS DA ROCHA PINHEIRO; elfutils-devel@sourceware.org
Assunto: Re: Group section
On 03/21/2017 12:38 PM, SASHA NICOLAS DA ROCHA PINHEIRO wrote:
>
> Hi Josh
> I am getting error on the following code, and it looks like to be related to group sections.
What is the error?
> As you can see I changed the dwarf_elf_init to dwarf_begin_elf, but passed NULL on the third parameter.
> Do you know how should I actually deal with it?
>
> 91 bool DwarfHandle::init_dbg()
> 92 {
> 93 //int status;
> 94 //Dwarf_Error err;
> 95 if (init_dwarf_status == dwarf_status_ok) {
> 96 return true;
> 97 }
> 98
> 99 if (init_dwarf_status == dwarf_status_error) {
> 100 return false;
> 101 }
> 102
> 103 //status = dwarf_elf_init(file->e_elfp(), DW_DLC_READ,
> 104 // err_func, &file_data, &file_data, &err);
> 105
> 106 file_data = dwarf_begin_elf(file->e_elfp(), DWARF_C_READ, NULL);
> 107 cerr << "Error message:" << dwarf_errmsg(-1) << endl;
> 108 if (!file_data) {
> 109 init_dwarf_status = dwarf_status_error;
> 110 return false;
> 111 }
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Group section
2017-03-21 20:46 ` SASHA NICOLAS DA ROCHA PINHEIRO
@ 2017-03-21 21:24 ` Mark Wielaard
0 siblings, 0 replies; 4+ messages in thread
From: Mark Wielaard @ 2017-03-21 21:24 UTC (permalink / raw)
To: SASHA NICOLAS DA ROCHA PINHEIRO; +Cc: Josh Stone, elfutils-devel
On Tue, Mar 21, 2017 at 08:46:25PM +0000, SASHA NICOLAS DA ROCHA PINHEIRO wrote:
> That's the problem. It says "no error" once, in another call it says
> "no reference value", and in another call "no DWARF information".
> [...]
> > 106Â Â Â Â file_data = dwarf_begin_elf(file->e_elfp(), DWARF_C_READ, NULL);Â Â Â Â Â Â Â Â Â Â Â Â
> > 107Â Â Â Â cerr << "Error message:" << dwarf_errmsg(-1) << endl;Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> > 108Â Â Â Â if (!file_data) {Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> > 109Â Â Â Â Â Â Â Â init_dwarf_status = dwarf_status_error;Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> > 110Â Â Â Â Â Â Â Â return false;Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> > 111Â Â Â Â }
Note that if file_data != NULL then the result of dwarf_errmsg (-1)
is undefined. You should first check file_data == NULL before calling
dwarf_errmsg (-1).
Cheers,
Mark
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2017-03-21 21:24 UTC | newest]
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2017-03-21 19:39 Group section SASHA NICOLAS DA ROCHA PINHEIRO
2017-03-21 19:53 ` Josh Stone
2017-03-21 20:46 ` SASHA NICOLAS DA ROCHA PINHEIRO
2017-03-21 21:24 ` Mark Wielaard
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