Hi Roland,
branch jankratochvil/readelf-width
On Wed, 10 Oct 2012 20:47:13 +0200, Roland McGrath wrote:
> I don't recall at all why I
> set ITEM_WRAP_COLUMN so high. At the moment I can't think of any good
> rationale for ever wrapping past column 79, and 75 seems like a good choice.
> Does anything bad happen if you just change ITEM_WRAP_COLUMN to 75?
Yes, bad will happen:
info.si_signo: 6, info.si_code: 0, info.si_errno: 0, cursig: 6
->
info.si_signo: 6, info.si_code: 0
info.si_errno: 0, cursig: 6
etc., everything gets too narrow.
Because max_width is very exaggerated there while the values here like "0" or
"6" are in reality much shorter.
I find the output with applied patch fine, do you see a problem there?
To see the reason this is a debug output with print_core_item having added:
printf ("<%zu:%s>", format_max, format);
Note segment of 2108 bytes at offset 0x2d4:
Owner Data size Type
CORE 144 PRSTATUS
info.si_signo: 6<11:%d>, info.si_code: 0<11:%d>, info.si_errno: 0<11:%d>,
cursig: 6<6:%d>
sigpend: <><132:<%s>>
sighold: <><132:<%s>>
pid: 21689<11:%d>, ppid: 21686<11:%d>, pgrp: 21686<11:%d>, sid: 5663<11:%d>
utime: 0.000000<18:%lu.%.6lu>, stime: 0.000999<18:%lu.%.6lu>, cutime:
0.000000<18:%lu.%.6lu>, cstime: 0.000000<18:%lu.%.6lu>
orig_eax: 270<11:%d>, fpvalid: 1<11:%d>
ebx: 21687<11:%11d> ecx: 21689<11:%11d> edx:
6<11:%11d>
esi: 0<11:%11d> edi: -143585292<11:%11d> ebp:
0xf7562308<11: 0x%.8x>
eax: 0<11:%11d> eip: 0xf774d430<11: 0x%.8x> eflags:
0x00000296<11: 0x%.8x>
esp: 0xf75621a4<11: 0x%.8x>
ds: 0x002b<6:0x%.4x> es: 0x002b<6:0x%.4x> fs: 0x0000<6:0x%.4x> gs:
0x0063<6:0x%.4x> cs: 0x0023<6:0x%.4x> ss: 0x002b<6:0x%.4x>
CORE 124 PRPSINFO
state: 2<4:%d>, sname: D<1:%c>, zomb: 0<4:%d>, nice: 0<4:%d>, flag:
0x00402404<11:0x%.8x>
uid: 1001<6:%d>, gid: 1001<6:%d>, pid: 21687<11:%d>, ppid: 21686<11:%d>,
pgrp: 21686<11:%d>, sid: 5663<11:%d>
fname: backtrace-child<16:%.*s>, psargs: ./backtrace-child-biarch --gencore
--run <80:%.*s>
CORE 160 AUXV
SYSINFO: 0xf774d420
SYSINFO_EHDR: 0xf774d000
HWCAP: 0xbfebfbff <fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe>
PAGESZ: 4096
CLKTCK: 100
PHDR: 0xf7771034
PHENT: 32
PHNUM: 8
BASE: 0xa84c7000
FLAGS: 0
ENTRY: 0xf7771670
UID: 1001
EUID: 1001
GID: 1001
EGID: 1001
SECURE: 0
RANDOM: 0xffcfabbb
EXECFN: 0xffcfcfdf
PLATFORM: 0xffcfabcb
NULL
CORE 108 FPREGSET
st0: 0x00000000000000000000<22:0x%s> st1: 0x00000000000000000000<22:0x%s>
st2: 0x00000000000000000000<22:0x%s> st3: 0x00000000000000000000<22:0x%s>
st4: 0x00000000000000000000<22:0x%s> st5: 0x00000000000000000000<22:0x%s>
st6: 0x00000000000000000000<22:0x%s> st7: 0x00000000000000000000<22:0x%s>
fctrl: 0x037f<6:0x%.4x> fstat: 0xffff<6:0x%.4x>
LINUX 512 PRXFPREG
xmm0: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm1: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm2: 0x000000000030392e34312e3200504d53<34:0x%.16lx%.16lx>
xmm3: 0xffffffffff00000000000000ff000000<34:0x%.16lx%.16lx>
xmm4: 0x000000000030392e34312e3200504d53<34:0x%.16lx%.16lx>
xmm5: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm6: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm7: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
st0: 0x00000000000000000000<22:0x%s> st1: 0x00000000000000000000<22:0x%s>
st2: 0x00000000000000000000<22:0x%s> st3: 0x00000000000000000000<22:0x%s>
st4: 0x00000000000000000000<22:0x%s> st5: 0x00000000000000000000<22:0x%s>
st6: 0x00000000000000000000<22:0x%s> st7: 0x00000000000000000000<22:0x%s>
mxcsr: 0x00001f80<11: 0x%.8x>
fctrl: 0x037f<6:0x%.4x> fstat: 0x0000<6:0x%.4x>
LINUX 48 386_TLS
index: 12<11:%d>, base: 0xf7562b40<11:0x%.8x>, limit:
0x000fffff<11:0x%.8x>, flags: 0x00000051<11:0x%.8x>
index: 13<11:%d>, base: 0x00000000<11:0x%.8x>, limit:
0x00000000<11:0x%.8x>, flags: 0x00000028<11:0x%.8x>
index: 14<11:%d>, base: 0x00000000<11:0x%.8x>, limit:
0x00000000<11:0x%.8x>, flags: 0x00000028<11:0x%.8x>
CORE 144 PRSTATUS
info.si_signo: 6<11:%d>, info.si_code: 0<11:%d>, info.si_errno: 0<11:%d>,
cursig: 6<6:%d>
sigpend: <><132:<%s>>
sighold: <><132:<%s>>
pid: 21687<11:%d>, ppid: 21686<11:%d>, pgrp: 21686<11:%d>, sid: 5663<11:%d>
utime: 0.000000<18:%lu.%.6lu>, stime: 0.000999<18:%lu.%.6lu>, cutime:
0.000000<18:%lu.%.6lu>, cstime: 0.000000<18:%lu.%.6lu>
orig_eax: 240<11:%d>, fpvalid: 1<11:%d>
ebx: -145347672<11:%11d> ecx: 0<11:%11d> edx:
21689<11:%11d>
esi: 0<11:%11d> edi: -143470604<11:%11d> ebp:
0xf7562b40<11: 0x%.8x>
eax: -512<11:%11d> eip: 0xf774d430<11: 0x%.8x> eflags:
0x00000296<11: 0x%.8x>
esp: 0xffcfa900<11: 0x%.8x>
ds: 0x002b<6:0x%.4x> es: 0x002b<6:0x%.4x> fs: 0x0000<6:0x%.4x> gs:
0x0000<6:0x%.4x> cs: 0x0023<6:0x%.4x> ss: 0x002b<6:0x%.4x>
CORE 108 FPREGSET
st0: 0x00000000000000000000<22:0x%s> st1: 0x00000000000000000000<22:0x%s>
st2: 0x00000000000000000000<22:0x%s> st3: 0x00000000000000000000<22:0x%s>
st4: 0x00000000000000000000<22:0x%s> st5: 0x00000000000000000000<22:0x%s>
st6: 0x00000000000000000000<22:0x%s> st7: 0x00000000000000000000<22:0x%s>
fctrl: 0x037f<6:0x%.4x> fstat: 0xffff<6:0x%.4x>
LINUX 512 PRXFPREG
xmm0: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm1: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm2: 0x000000000030392e34312e3200504d53<34:0x%.16lx%.16lx>
xmm3: 0xffffffffff00000000000000ff000000<34:0x%.16lx%.16lx>
xmm4: 0x000000000030392e34312e3200504d53<34:0x%.16lx%.16lx>
xmm5: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm6: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
xmm7: 0x00000000000000000000000000000000<34:0x%.16lx%.16lx>
st0: 0x00000000000000000000<22:0x%s> st1: 0x00000000000000000000<22:0x%s>
st2: 0x00000000000000000000<22:0x%s> st3: 0x00000000000000000000<22:0x%s>
st4: 0x00000000000000000000<22:0x%s> st5: 0x00000000000000000000<22:0x%s>
st6: 0x00000000000000000000<22:0x%s> st7: 0x00000000000000000000<22:0x%s>
mxcsr: 0x00001f80<11: 0x%.8x>
fctrl: 0x037f<6:0x%.4x> fstat: 0x0000<6:0x%.4x>
LINUX 48 386_TLS
index: 12<11:%d>, base: 0xf7563940<11:0x%.8x>, limit:
0x000fffff<11:0x%.8x>, flags: 0x00000051<11:0x%.8x>
index: 13<11:%d>, base: 0x00000000<11:0x%.8x>, limit:
0x00000000<11:0x%.8x>, flags: 0x00000028<11:0x%.8x>
index: 14<11:%d>, base: 0x00000000<11:0x%.8x>, limit:
0x00000000<11:0x%.8x>, flags: 0x00000028<11:0x%.8x>
Thanks,
Jan
commit 033e40bfb2d9e780197995f378c0c51c666ecabc
Author: Jan Kratochvil <[email protected]>
Date: Wed Oct 10 22:27:58 2012 +0200
src/
2012-10-10 Jan Kratochvil <[email protected]>
* readelf.c (ITEM_WRAP_COLUMN, REGISTER_WRAP_COLUMN): Merge to ...
(WRAP_COLUMN): ... here, keep it at 75.
(print_core_item): Remove parameter format_max. Update function
comment. Replace FORMAT_MAX by the real output width.
(handle_core_item): Remove the FORMAT_MAX values in TYPES, DO_TYPE,
calls of print_core_item, remove variable maxfmt, change
ITEM_WRAP_COLUMN to WRAP_COLUMN.
(handle_core_register): Remove the FORMAT_MAX values in TYPES, BITS,
calls of print_core_item, change REGISTER_WRAP_COLUMN to WRAP_COLUMN.
tests/
2012-10-10 Jan Kratochvil <[email protected]>
* run-readelf-mixed-corenote.sh: Update expected output.
* run-readelf-vmcoreinfo.sh: Likewise.
Signed-off-by: Jan Kratochvil <[email protected]>
diff --git a/src/readelf.c b/src/readelf.c
index 5d167eb..1a9092c 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -7337,24 +7337,30 @@ print_debug (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr
*ehdr)
#define ITEM_INDENT 4
-#define ITEM_WRAP_COLUMN 150
-#define REGISTER_WRAP_COLUMN 75
+#define WRAP_COLUMN 75
+
+/* Print "NAME: FORMAT", wrapping when output text would make the line exceed
+ WRAP_COLUMN. We do not want the line breaks to depend on the particular
+ values, this is why the FORMAT strings typically already contain their
+ maximum width. */
-/* Print "NAME: FORMAT", wrapping when FORMAT_MAX chars of FORMAT would
- make the line exceed ITEM_WRAP_COLUMN. Unpadded numbers look better
- for the core items. But we do not want the line breaks to depend on
- the particular values. */
static unsigned int
-__attribute__ ((format (printf, 7, 8)))
+__attribute__ ((format (printf, 6, 7)))
print_core_item (unsigned int colno, char sep, unsigned int wrap,
- size_t name_width, const char *name,
- size_t format_max, const char *format, ...)
+ size_t name_width, const char *name, const char *format, ...)
{
size_t len = strlen (name);
if (name_width < len)
name_width = len;
- size_t n = name_width + sizeof ": " - 1 + format_max;
+ char *out;
+ va_list ap;
+ va_start (ap, format);
+ int i = vasprintf (&out, format, ap);
+ assert (i >= 0);
+ va_end (ap);
+
+ size_t n = name_width + sizeof ": " - 1 + strlen (out);
if (colno == 0)
{
@@ -7372,12 +7378,7 @@ print_core_item (unsigned int colno, char sep, unsigned
int wrap,
colno = ITEM_INDENT + n;
}
- printf ("%s: %*s", name, (int) (name_width - len), "");
-
- va_list ap;
- va_start (ap, format);
- vprintf (format, ap);
- va_end (ap);
+ printf ("%s: %*s%s", name, (int) (name_width - len), "", out);
return colno;
}
@@ -7420,14 +7421,14 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
uint_fast16_t count = item->count ?: 1;
#define TYPES \
- DO_TYPE (BYTE, Byte, "0x%.2" PRIx8, "%" PRId8, 4); \
- DO_TYPE (HALF, Half, "0x%.4" PRIx16, "%" PRId16, 6); \
- DO_TYPE (WORD, Word, "0x%.8" PRIx32, "%" PRId32, 11);
\
- DO_TYPE (SWORD, Sword, "%" PRId32, "%" PRId32, 11); \
- DO_TYPE (XWORD, Xword, "0x%.16" PRIx64, "%" PRId64, 20); \
- DO_TYPE (SXWORD, Sxword, "%" PRId64, "%" PRId64, 20)
-
-#define DO_TYPE(NAME, Name, hex, dec, max) GElf_##Name Name[count]
+ DO_TYPE (BYTE, Byte, "0x%.2" PRIx8, "%" PRId8); \
+ DO_TYPE (HALF, Half, "0x%.4" PRIx16, "%" PRId16); \
+ DO_TYPE (WORD, Word, "0x%.8" PRIx32, "%" PRId32); \
+ DO_TYPE (SWORD, Sword, "%" PRId32, "%" PRId32); \
+ DO_TYPE (XWORD, Xword, "0x%.16" PRIx64, "%" PRId64); \
+ DO_TYPE (SXWORD, Sxword, "%" PRId64, "%" PRId64)
+
+#define DO_TYPE(NAME, Name, hex, dec) GElf_##Name Name[count]
union { TYPES; } value;
#undef DO_TYPE
@@ -7459,10 +7460,10 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
assert (count == 1);
switch (type)
{
-#define DO_TYPE(NAME, Name, hex, dec, max) \
+#define DO_TYPE(NAME, Name, hex, dec) \
case ELF_T_##NAME: \
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, \
- 0, item->name, max, dec, value.Name[0]); \
+ colno = print_core_item (colno, ',', WRAP_COLUMN, \
+ 0, item->name, dec, value.Name[0]); \
break
TYPES;
#undef DO_TYPE
@@ -7475,10 +7476,10 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
assert (count == 1);
switch (type)
{
-#define DO_TYPE(NAME, Name, hex, dec, max) \
+#define DO_TYPE(NAME, Name, hex, dec) \
case ELF_T_##NAME: \
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, \
- 0, item->name, max, hex, value.Name[0]); \
+ colno = print_core_item (colno, ',', WRAP_COLUMN, \
+ 0, item->name, hex, value.Name[0]); \
break
TYPES;
#undef DO_TYPE
@@ -7546,8 +7547,7 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
if (lastbit > 0 && lastbit + 1 != nbits)
p += sprintf (p, "-%u", nbits - bias);
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, 0, item->name,
- 4 + nbits * 4,
+ colno = print_core_item (colno, ',', WRAP_COLUMN, 0, item->name,
negate ? "~<%s>" : "<%s>", printed);
}
break;
@@ -7557,14 +7557,12 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
assert (count == 2);
Dwarf_Word sec;
Dwarf_Word usec;
- size_t maxfmt = 7;
switch (type)
{
-#define DO_TYPE(NAME, Name, hex, dec, max) \
+#define DO_TYPE(NAME, Name, hex, dec) \
case ELF_T_##NAME: \
sec = value.Name[0]; \
usec = value.Name[1]; \
- maxfmt += max; \
break
TYPES;
#undef DO_TYPE
@@ -7587,19 +7585,19 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
else
usec &= UINT32_MAX;
}
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, 0, item->name,
- maxfmt, "%" PRIu64 ".%.6" PRIu64, sec, usec);
+ colno = print_core_item (colno, ',', WRAP_COLUMN, 0, item->name,
+ "%" PRIu64 ".%.6" PRIu64, sec, usec);
break;
case 'c':
assert (count == 1);
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, 0, item->name,
- 1, "%c", value.Byte[0]);
+ colno = print_core_item (colno, ',', WRAP_COLUMN, 0, item->name,
+ "%c", value.Byte[0]);
break;
case 's':
- colno = print_core_item (colno, ',', ITEM_WRAP_COLUMN, 0, item->name,
- count, "%.*s", (int) count, value.Byte);
+ colno = print_core_item (colno, ',', WRAP_COLUMN, 0, item->name,
+ "%.*s", (int) count, value.Byte);
break;
case '\n':
@@ -7626,7 +7624,7 @@ handle_core_item (Elf *core, const Ebl_Core_Item *item,
const void *desc,
s = eol + 1;
}
- colno = ITEM_WRAP_COLUMN;
+ colno = WRAP_COLUMN;
break;
default:
@@ -7722,7 +7720,7 @@ handle_core_items (Elf *core, const void *desc, size_t
descsz,
colno = handle_core_item (core, *item, desc, colno, NULL);
/* Force a line break at the end of the group. */
- colno = ITEM_WRAP_COLUMN;
+ colno = WRAP_COLUMN;
}
if (descsz == 0)
@@ -7790,12 +7788,12 @@ handle_core_register (Ebl *ebl, Elf *core, int
maxregname,
register_info (ebl, reg, regloc, name, &bits, &type);
#define TYPES \
- BITS (8, BYTE, "%4" PRId8, "0x%.2" PRIx8, 4); \
- BITS (16, HALF, "%6" PRId16, "0x%.4" PRIx16, 6); \
- BITS (32, WORD, "%11" PRId32, " 0x%.8" PRIx32, 11); \
- BITS (64, XWORD, "%20" PRId64, " 0x%.16" PRIx64, 20)
+ BITS (8, BYTE, "%4" PRId8, "0x%.2" PRIx8); \
+ BITS (16, HALF, "%6" PRId16, "0x%.4" PRIx16); \
+ BITS (32, WORD, "%11" PRId32, " 0x%.8" PRIx32); \
+ BITS (64, XWORD, "%20" PRId64, " 0x%.16" PRIx64)
-#define BITS(bits, xtype, sfmt, ufmt, max) \
+#define BITS(bits, xtype, sfmt, ufmt) \
uint##bits##_t b##bits; int##bits##_t b##bits##s
union { TYPES; uint64_t b128[2]; } value;
#undef BITS
@@ -7807,17 +7805,17 @@ handle_core_register (Ebl *ebl, Elf *core, int
maxregname,
case DW_ATE_address:
switch (bits)
{
-#define BITS(bits, xtype, sfmt, ufmt, max) \
+#define BITS(bits, xtype, sfmt, ufmt) \
case bits: \
desc = convert (core, ELF_T_##xtype, 1, &value, desc, 0); \
if (type == DW_ATE_signed) \
- colno = print_core_item (colno, ' ', REGISTER_WRAP_COLUMN, \
+ colno = print_core_item (colno, ' ', WRAP_COLUMN, \
maxregname, name, \
- max, sfmt, value.b##bits##s); \
+ sfmt, value.b##bits##s); \
else \
- colno = print_core_item (colno, ' ', REGISTER_WRAP_COLUMN, \
+ colno = print_core_item (colno, ' ', WRAP_COLUMN, \
maxregname, name, \
- max, ufmt, value.b##bits); \
+ ufmt, value.b##bits); \
break
TYPES;
@@ -7826,9 +7824,9 @@ handle_core_register (Ebl *ebl, Elf *core, int maxregname,
assert (type == DW_ATE_unsigned);
desc = convert (core, ELF_T_XWORD, 2, &value, desc, 0);
int be = elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB;
- colno = print_core_item (colno, ' ', REGISTER_WRAP_COLUMN,
+ colno = print_core_item (colno, ' ', WRAP_COLUMN,
maxregname, name,
- 34, "0x%.16" PRIx64 "%.16" PRIx64,
+ "0x%.16" PRIx64 "%.16" PRIx64,
value.b128[!be], value.b128[be]);
break;
@@ -7857,9 +7855,8 @@ handle_core_register (Ebl *ebl, Elf *core, int maxregname,
*h++ = "0123456789abcdef"[bytes[idx] >> 4];
*h++ = "0123456789abcdef"[bytes[idx] & 0xf];
}
- colno = print_core_item (colno, ' ', REGISTER_WRAP_COLUMN,
- maxregname, name,
- 2 + sizeof hex - 1, "0x%s", hex);
+ colno = print_core_item (colno, ' ', WRAP_COLUMN,
+ maxregname, name, "0x%s", hex);
break;
}
desc += regloc->pad;
@@ -7998,7 +7995,7 @@ handle_core_registers (Ebl *ebl, Elf *core, const void
*desc,
reg->regloc, desc, colno);
/* Force a line break at the end of the group. */
- colno = REGISTER_WRAP_COLUMN;
+ colno = WRAP_COLUMN;
}
return colno;
diff --git a/tests/run-readelf-mixed-corenote.sh
b/tests/run-readelf-mixed-corenote.sh
index f9b96c8..5406433 100755
--- a/tests/run-readelf-mixed-corenote.sh
+++ b/tests/run-readelf-mixed-corenote.sh
@@ -25,8 +25,7 @@ Note segment of 892 bytes at offset 0x274:
Owner Data size Type
CORE 148 PRSTATUS
info.si_signo: 11, info.si_code: 0, info.si_errno: 0, cursig: 11
- sigpend: <>
- sighold: <>
+ sigpend: <>, sighold: <>
pid: 11087, ppid: 11063, pgrp: 11087, sid: 11063
utime: 0.000000, stime: 0.010000, cutime: 0.000000, cstime: 0.000000
orig_r0: -1, fpvalid: 1
diff --git a/tests/run-readelf-vmcoreinfo.sh b/tests/run-readelf-vmcoreinfo.sh
index da361c8..b441a58 100755
--- a/tests/run-readelf-vmcoreinfo.sh
+++ b/tests/run-readelf-vmcoreinfo.sh
@@ -25,8 +25,7 @@ Note segment of 2104 bytes at offset 0x158:
Owner Data size Type
CORE 336 PRSTATUS
info.si_signo: 0, info.si_code: 0, info.si_errno: 0, cursig: 0
- sigpend: <>
- sighold: <>
+ sigpend: <>, sighold: <>
pid: 3519, ppid: 0, pgrp: 0, sid: 0
utime: 0.000000, stime: 0.000000, cutime: 0.000000, cstime: 0.000000
orig_rax: -1, fpvalid: 0
@@ -43,8 +42,7 @@ Note segment of 2104 bytes at offset 0x158:
cs: 0x0010 ss: 0x0018 ds: 0x0000 es: 0x0000 fs: 0x0000 gs: 0x0000
CORE 336 PRSTATUS
info.si_signo: 0, info.si_code: 0, info.si_errno: 0, cursig: 0
- sigpend: <>
- sighold: <>
+ sigpend: <>, sighold: <>
pid: 0, ppid: 0, pgrp: 0, sid: 0
utime: 0.000000, stime: 0.000000, cutime: 0.000000, cstime: 0.000000
orig_rax: -1, fpvalid: 0
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