gcc will segment fault when compiling following code (copied from linux kernel)
when no optimize option is given (I need to debug linux kernel without
optimizing interfere my investigation):
gcc -S -i hello1.i
//hello1.i
1
2 struct genapic {
3
4 int (*check_phys_apicid_present)(int boot_cpu_physical_apicid);
5
6 unsigned (*get_apic_id)(unsigned long x);
7
8 };
9
10 static inline __attribute__((always_inline)) unsigned
get_apic_id(unsigned long x)
11 {
12 return 1;
13 }
14
15
16
17 static inline int check_phys_apicid_present(int cpu_physical_apicid)
18 {
19
20 return get_apic_id(2);
21
22 }
23
24
25 struct genapic apic_es7000 = { .check_phys_apicid_present =
check_phys_apicid_present,.get_ apic_id = get_apic_id, };
A solution is change gcc-4.1.0's function cgraph_preserve_function_body_p:
1201 bool
1202 cgraph_preserve_function_body_p (tree decl)
1203 {
1204 struct cgraph_node *node;
1205 /* Keep the body; we're going to dump it. */
1206 if (dump_enabled_p (TDI_tree_all))
1207 return true;
1208 if (!cgraph_global_info_ready)
1209 return (DECL_INLINE (decl) && !flag_really_no_inline);
1210 /* Look if there is any clone around. */
1211 for (node = cgraph_node (decl); node; node = node->next_clone)
1212 if (node->global.inlined_to)
1213 return true;
1214 return false;
1215 }
into
bool
cgraph_preserve_function_body_p (tree decl)
{
struct cgraph_node *node;
/* Keep the body; we're going to dump it. */
if (dump_enabled_p (TDI_tree_all))
return true;
if (!cgraph_global_info_ready && !((DECL_INLINE (decl) &&
!flag_really_no_inline))){
for (node = cgraph_node (decl); node; node = node->next_clone)
if (node->global.local.disregard_inline_limits)
return true;
return false;
}
/* Look if there is any clone around. */
for (node = cgraph_node (decl); node; node = node->next_clone)
if (node->global.inlined_to)
return true;
return false;
}
best regards
Zhouyi Zhou
--
Summary: C handling of always_inline attribute error and a
solution
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zhouyi04 at ios dot cn
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31077
