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objtool: Shrink reloc->sym_reloc_entry

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Convert it to a singly-linked list.

With allyesconfig + CONFIG_DEBUG_INFO:

- Before: peak heap memory consumption: 38.64G
- After:  peak heap memory consumption: 36.89G

Link: https://lore.kernel.org/r/a51f0a6f9bbf2494d5a3a449807307e78a940988.1685464332.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf 2023-05-30 10:21:10 -07:00
parent be2f0b1e12
commit 890f10a433
2 changed files with 7 additions and 6 deletions
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9
tools/objtool/elf.c
View file

@ -356,7 +356,6 @@ static void elf_add_symbol(struct elf *elf, struct symbol *sym)
struct rb_node *pnode;
struct symbol *iter;
INIT_LIST_HEAD(&sym->reloc_list);
INIT_LIST_HEAD(&sym->pv_target);
sym->alias = sym;
@ -540,7 +539,7 @@ static int elf_update_sym_relocs(struct elf *elf, struct symbol *sym)
{
struct reloc *reloc;
list_for_each_entry(reloc, &sym->reloc_list, sym_reloc_entry) {
for (reloc = sym->relocs; reloc; reloc = reloc->sym_next_reloc) {
reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc_type(reloc));
if (elf_write_reloc(elf, reloc))
return -1;
@ -841,8 +840,9 @@ static struct reloc *elf_init_reloc(struct elf *elf, struct section *rsec,
if (elf_write_reloc(elf, reloc))
return NULL;
list_add_tail(&reloc->sym_reloc_entry, &sym->reloc_list);
elf_hash_add(reloc, &reloc->hash, reloc_hash(reloc));
reloc->sym_next_reloc = sym->relocs;
sym->relocs = reloc;
return reloc;
}
@ -960,8 +960,9 @@ static int read_relocs(struct elf *elf)
return -1;
}
list_add_tail(&reloc->sym_reloc_entry, &sym->reloc_list);
elf_hash_add(reloc, &reloc->hash, reloc_hash(reloc));
reloc->sym_next_reloc = sym->relocs;
sym->relocs = reloc;
nr_reloc++;
}

4
tools/objtool/include/objtool/elf.h
View file

@ -63,7 +63,7 @@ struct symbol {
u8 profiling_func : 1;
u8 warned : 1;
struct list_head pv_target;
struct list_head reloc_list;
struct reloc *relocs;
};
struct reloc {
@ -74,7 +74,7 @@ struct reloc {
};
struct section *sec;
struct symbol *sym;
struct list_head sym_reloc_entry;
struct reloc *sym_next_reloc;
};
struct elf {