[PATCH] makedumpfile: Add support to module data structures
Atsushi Kumagai
kumagai-atsushi at mxc.nes.nec.co.jp
Fri Feb 28 02:30:50 EST 2014
>On Friday 28 February 2014 12:21 PM, Atsushi Kumagai wrote:
>>> diff --git a/dwarf_info.c b/dwarf_info.c
>>> index 6e21b8a..268e922 100644
>>> --- a/dwarf_info.c
>>> +++ b/dwarf_info.c
>>> @@ -489,7 +489,6 @@ get_die_from_offset(Dwarf_Off offset, Dwarf_Die *die)
>>> return FALSE;
>>>
>>> if (!dwarf_offdie(dwarf_info.dwarfd, offset, die)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return FALSE;
>>> }
>>>
>>> @@ -1343,14 +1342,12 @@ get_die_nfields(unsigned long long die_off)
>>> Dwarf_Die result, child, *die;
>>>
>>> if (!get_die_from_offset((Dwarf_Off) die_off, &result)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return -1;
>>> }
>>>
>>> die = &result;
>>> tag = dwarf_tag(die);
>>> if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
>>> - ERRMSG("DIE is not of structure or union type.\n");
>>> clean_dwfl_info();
>>> return -1;
>>> }
>>> @@ -1388,14 +1385,12 @@ get_die_member(unsigned long long die_off, int index, long *offset,
>>> return -1;
>>>
>>> if (!get_die_from_offset((Dwarf_Off) die_off, &result)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return -1;
>>> }
>>>
>>> die = &result;
>>> tag = dwarf_tag(die);
>>> if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
>>> - ERRMSG("DIE is not of structure or union type.\n");
>>> clean_dwfl_info();
>>> return -1;
>>> }
>>> @@ -1471,7 +1466,6 @@ get_die_attr_type(unsigned long long die_off, int *type_flag,
>>> return FALSE;
>>>
>>> if (!get_die_from_offset((Dwarf_Off) die_off, &result)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return FALSE;
>>> }
>>>
>>> @@ -1509,7 +1503,6 @@ get_die_name(unsigned long long die_off)
>>> return NULL;
>>>
>>> if (!get_die_from_offset((Dwarf_Off) die_off, &result)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return NULL;
>>> }
>>>
>>> @@ -1554,7 +1547,6 @@ get_die_length(unsigned long long die_off, int flag)
>>> return FALSE;
>>>
>>> if (!get_die_from_offset((Dwarf_Off) die_off, &result)) {
>>> - ERRMSG("Can't find the DIE.\n");
>>> return FALSE;
>>> }
>> Why did you remove these error messages ?
>> This change looks unrelated to the subject, you should at least
>> do it separately.
>
>It was throwing unnecessary messages when a particular die
>is not found in a module.
>
>Since this patch takes care of setting the debug info to the right
>module , removed the error messages here.
>
>Regards,
>Aruna
Thanks, I understand. I misunderstood that these changed functions are
old common utility, but in fact they are introduced for eppic.
So there is no problem.
Acked-by: Atsushi Kumagai <kumagai-atsushi at mxc.nes.nec.co.jp>
>
>>
>> Thanks
>> Atsushi Kumagai
>>
>>> diff --git a/erase_info.c b/erase_info.c
>>> index a789389..e0e0f71 100644
>>> --- a/erase_info.c
>>> +++ b/erase_info.c
>>> @@ -34,7 +34,7 @@ struct call_back eppic_cb = {
>>> &get_die_offset,
>>> &get_die_length,
>>> &get_die_member_all,
>>> - &get_die_nfields,
>>> + &get_die_nfields_all,
>>> &get_symbol_addr_all,
>>> &update_filter_info_raw
>>> };
>>> @@ -2028,6 +2028,84 @@ get_domain_all(char *symname, int cmd, unsigned long long *die) {
>>> }
>>>
>>> /*
>>> + * Search for die in modules as well as vmlinux
>>> + */
>>> +int
>>> +get_die_nfields_all(unsigned long long die_off)
>>> +{
>>> + short vmlinux_searched = 0;
>>> + long nfields = -1;
>>> + unsigned int i, current_mod;
>>> + struct module_info *modules;
>>> +
>>> + /* Search in vmlinux if debuginfo is set to vmlinux */
>>> + if (!strcmp(get_dwarf_module_name(), "vmlinux")) {
>>> + nfields = get_die_nfields(die_off);
>>> + if (nfields > 0)
>>> + return nfields;
>>> +
>>> + vmlinux_searched = 1;
>>> + }
>>> +
>>> + /*
>>> + * Proceed the search in modules. Try in the module
>>> + * which resulted in a hit in the previous search
>>> + */
>>> +
>>> + modules = mod_st.modules;
>>> + current_mod = mod_st.current_mod;
>>> +
>>> + if (strcmp(get_dwarf_module_name(), modules[current_mod].name)) {
>>> + if (!set_dwarf_debuginfo(modules[current_mod].name,
>>> + info->system_utsname.release, NULL, -1)) {
>>> + ERRMSG("Cannot set to current module %s\n",
>>> + modules[current_mod].name);
>>> + return -1;
>>> + }
>>> + }
>>> +
>>> + nfields = get_die_nfields(die_off);
>>> + if (nfields > 0)
>>> + return nfields;
>>> +
>>> + /* Search in all modules */
>>> + for (i = 0; i < mod_st.num_modules; i++) {
>>> +
>>> + /* Already searched. Skip */
>>> + if (i == current_mod)
>>> + continue;
>>> +
>>> + if (!set_dwarf_debuginfo(modules[i].name,
>>> + info->system_utsname.release, NULL, -1)) {
>>> + ERRMSG("Skipping Module section %s\n", modules[i].name);
>>> + continue;
>>> + }
>>> +
>>> + nfields = get_die_nfields(die_off);
>>> +
>>> + if (nfields < 0)
>>> + continue;
>>> +
>>> + /*
>>> + * Die found. Set the current_mod to this module index,
>>> + * a minor optimization for fast lookup next time
>>> + */
>>> + mod_st.current_mod = i;
>>> + return nfields;
>>> + }
>>> +
>>> + /* Die not found in any module. Set debuginfo back to vmlinux */
>>> + set_dwarf_debuginfo("vmlinux", NULL, info->name_vmlinux,
>>> + info->fd_vmlinux);
>>> +
>>> + if (!vmlinux_searched)
>>> + return get_die_nfields(die_off);
>>> + else
>>> + return -1;
>>> +
>>> +}
>>> +
>>> +/*
>>> * Search for die member in modules as well as vmlinux
>>> */
>>> int
>>> diff --git a/erase_info.h b/erase_info.h
>>> index a90fac0..4d4957e 100644
>>> --- a/erase_info.h
>>> +++ b/erase_info.h
>>> @@ -35,6 +35,7 @@ unsigned long long get_symbol_addr_all(char *);
>>> long get_domain_all(char *, int, unsigned long long *);
>>> int get_die_member_all(unsigned long long die_off, int index, long *offset,
>>> char **name, int *nbits, int *fbits, unsigned long long *m_die);
>>> +int get_die_nfields_all(unsigned long long die_off);
>>>
>>> struct call_back {
>>> long (*get_domain_all)(char *, int, unsigned long long *);
>>> @@ -48,7 +49,7 @@ struct call_back {
>>> int (*get_die_member_all)(unsigned long long die_off, int index,
>>> long *offset, char **name, int *nbits, int *fbits,
>>> unsigned long long *m_die);
>>> - int (*get_die_nfields)(unsigned long long die_off);
>>> + int (*get_die_nfields_all)(unsigned long long die_off);
>>> unsigned long long (*get_symbol_addr_all)(char *symname);
>>> int (*update_filter_info_raw)(unsigned long long, int, int);
>>> };
>>> diff --git a/extension_eppic.c b/extension_eppic.c
>>> index 7e045c9..bb36d5a 100644
>>> --- a/extension_eppic.c
>>> +++ b/extension_eppic.c
>>> @@ -219,7 +219,7 @@ apimember(char *mname, ull idx, type_t *tm, member_t *m, ull *last_index)
>>> ull m_die, die_off = idx;
>>> char *name = NULL;
>>>
>>> - nfields = GET_DIE_NFIELDS(die_off);
>>> + nfields = GET_DIE_NFIELDS_ALL(die_off);
>>> /*
>>> * GET_DIE_NFIELDS() returns < 0 if the die is not structure type
>>> * or union type
>>> diff --git a/extension_eppic.h b/extension_eppic.h
>>> index 42437f2..24189ba 100644
>>> --- a/extension_eppic.h
>>> +++ b/extension_eppic.h
>>> @@ -88,7 +88,7 @@ struct call_back *cb;
>>> #define GET_DIE_OFFSET cb->get_die_offset
>>> #define GET_DIE_LENGTH cb->get_die_length
>>> #define GET_DIE_MEMBER_ALL cb->get_die_member_all
>>> -#define GET_DIE_NFIELDS cb->get_die_nfields
>>> +#define GET_DIE_NFIELDS_ALL cb->get_die_nfields_all
>>> #define GET_SYMBOL_ADDR_ALL cb->get_symbol_addr_all
>>> #define UPDATE_FILTER_INFO_RAW cb->update_filter_info_raw
>>>
>>>
>>>
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>
>
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