http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57085
Bug #: 57085
Summary: Segmentation Fault when building a c file
Classification: Unclassified
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: syner...@codefi.re
GCC head is at "PR go/57045." I receive the following segmentation fault while
building system/extras of android. The flags gcc was built with are as follows:
--with-float=soft --with-fpu=neon --with-arch=armv7-a --enable-target-optspace
--with-abi=aapcs --disable-libssp --enable-threads --disable-nls
--disable-libmudflap --disable-libgomp --disable-libstdc__-v3
--disable-sjlj-exceptions --disable-shared --disable-tls --disable-libitm
--disable-libquadmath --disable-libatomic.
Here's the error and backtrace:
system/extras/ext4_utils/contents.c:162:1: internal compiler error:
Segmentation fault
}
0x974095 crash_signal
../../../build/../gcc/gcc-4.9/gcc/toplev.c:333
0x8d68ea reload_cse_simplify_operands
../../../build/../gcc/gcc-4.9/gcc/postreload.c:655
0x8d6f3c reload_cse_simplify
../../../build/../gcc/gcc-4.9/gcc/postreload.c:123
0x8d6f3c reload_cse_regs_1
../../../build/../gcc/gcc-4.9/gcc/postreload.c:220
0x8d71a8 reload_cse_regs
../../../build/../gcc/gcc-4.9/gcc/postreload.c:75
0x8d71a8 rest_of_handle_postreload
../../../build/../gcc/gcc-4.9/gcc/postreload.c:2294
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
The code in contents.c is as follows:
u32 make_directory(u32 dir_inode_num, u32 entries, struct dentry *dentries,
u32 dirs)
{
struct ext4_inode *inode;
u32 blocks;
u32 len;
u32 offset = 0;
u32 inode_num;
u8 *data;
unsigned int i;
struct ext4_dir_entry_2 *dentry;
blocks = DIV_ROUND_UP(dentry_size(entries, dentries), info.block_size);
len = blocks * info.block_size;
if (dir_inode_num) {
inode_num = allocate_inode(info);
} else {
dir_inode_num = EXT4_ROOT_INO;
inode_num = EXT4_ROOT_INO;
}
if (inode_num == EXT4_ALLOCATE_FAILED) {
error("failed to allocate inode\n");
return EXT4_ALLOCATE_FAILED;
}
add_directory(inode_num);
inode = get_inode(inode_num);
if (inode == NULL) {
error("failed to get inode %u", inode_num);
return EXT4_ALLOCATE_FAILED;
}
data = inode_allocate_data_extents(inode, len, len);
if (data == NULL) {
error("failed to allocate %u extents", len);
return EXT4_ALLOCATE_FAILED;
}
inode->i_mode = S_IFDIR;
inode->i_links_count = dirs + 2;
inode->i_flags |= aux_info.default_i_flags;
dentry = NULL;
dentry = add_dentry(data, &offset, NULL, inode_num, ".", EXT4_FT_DIR);
if (!dentry) {
error("failed to add . directory");
return EXT4_ALLOCATE_FAILED;
}
for (i = 0; i < entries; i++) {
dentry = add_dentry(data, &offset, dentry, 0,
dentries[i].filename, dentries[i].file_type);
if (offset > len || (offset == len && i != entries - 1))
critical_error("internal error: dentry for %s ends at
%d, past %d\n",
dentries[i].filename, offset, len);
dentries[i].inode = &dentry->inode;
if (!dentry) {
error("failed to add directory");
return EXT4_ALLOCATE_FAILED;
}
}
/* pad the last dentry out to the end of the block */
dentry->rec_len += len - offset;
return inode_num;
}
^^^^ The last line is line 162.
Thank you
