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List: perl5-changes
Subject: [perl.git] branch sprout/rocoy, updated. v5.19.7-77-gf212066
From: "Father Chrysostomos" <sprout () cpan ! org>
Date: 2014-01-17 1:48:49
Message-ID: E1W3yYD-00059E-Jg () camel ! ams6 ! corp ! booking ! com
[Download RAW message or body]
In perl.git, the branch sprout/rocoy has been updated
<http://perl5.git.perl.org/perl.git/commitdiff/f212066e0475936eb714d69457d7e43a4655c364?hp=080dc6b45f1449e70629d54dd2587ee345613271>
- Log -----------------------------------------------------------------
commit f212066e0475936eb714d69457d7e43a4655c364
Author: Father Chrysostomos <sprout@cpan.org>
Date: Mon Jan 13 22:02:37 2014 -0800
fixups for non-threaded buidls
M sv.c
M util.c
commit 0fd6a76670a96dbf69a9805cb07285b581bf035d
Author: Father Chrysostomos <sprout@cpan.org>
Date: Mon Jan 13 20:37:33 2014 -0800
uniprops.t fixup
M t/re/uniprops.t
commit 35a5fe1fa57324e87d07172a3c170924af21b548
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sat Jan 11 16:45:18 2014 -0800
util.c: A couple of defines to simplify #ifdef maze
No real simplification in terms of the number of #ifdefs, but more
readability (hopefully).
M util.c
commit 13ec61dcd3afcb0433496286ef9b644fca0ffacd
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sat Jan 11 16:36:15 2014 -0800
More poison fixups
M util.c
commit 25f35f0f3145ed1965a10c362ce05412c9afbc66
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sat Jan 11 16:22:50 2014 -0800
fixups
M util.c
commit d0b21cdd17c74955d386b2dffd54a07794214013
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sat Jan 11 16:22:02 2014 -0800
safesyscalloc must support rocow
We cannot just delegate to safesysmalloc, as PERL_POISON will
poison the buffer newly zeroed by mmap.
M util.c
commit fe1ec8acc710f2ae651ed6ee2870ce30e3665ad9
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sat Jan 11 11:14:18 2014 -0800
Use sTHX
M perl.c
M perl.h
M sv.c
M util.c
commit 2d2035d7fc31a1cc054ebeaa1baaad747c7b6a90
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sun Jan 5 16:20:58 2014 -0800
threads.t: Increase watchdog timeout
PERL_DEBUG_READONLY_COW is too slow for a 60s timeout.
M t/op/threads.t
commit 9882699e7ce48df9fd50f2f79f08a0478d2722eb
Author: Father Chrysostomos <sprout@cpan.org>
Date: Sun Jan 5 16:09:35 2014 -0800
Make XS::APItest::establish_cleanup protect existing stacks
It causes pp_entersub to be called in odd places, which can cause the
context stack to be reallocated when an outer function call (like
pp_leavesub) has a pointer into the context stack in a C auto.
cleanup.t was failing for me under PERL_DEBUG_READONLY_COW +
STRESS_REALLOC + threads, because the context stack was reallocated
and the old address then freed and reused for something else, being
zeroed in the mean time. So pp_leavesub returned NULL (trying to
read retop from the context stack), causing the program to exit.
During global destruction, subs that had not be exited properly were
undefined, leading to:
1..3
Can't undef active subroutine during global destruction.
M ext/XS-APItest/APItest.xs
-----------------------------------------------------------------------
Summary of changes:
ext/XS-APItest/APItest.xs | 2 +
perl.c | 6 +-
perl.h | 27 +++++++-
sv.c | 30 ++++++---
t/op/threads.t | 2 +-
t/re/uniprops.t | 1 -
util.c | 152 ++++++++++++++++++++++++++++++----------------
7 files changed, 151 insertions(+), 69 deletions(-)
diff --git a/ext/XS-APItest/APItest.xs b/ext/XS-APItest/APItest.xs
index bed8ec3..21a536a 100644
--- a/ext/XS-APItest/APItest.xs
+++ b/ext/XS-APItest/APItest.xs
@@ -532,12 +532,14 @@ STATIC void
THX_run_cleanup(pTHX_ void *cleanup_code_ref)
{
dSP;
+ PUSHSTACK;
ENTER;
SAVETMPS;
PUSHMARK(SP);
call_sv((SV*)cleanup_code_ref, G_VOID|G_DISCARD);
FREETMPS;
LEAVE;
+ POPSTACK;
}
STATIC OP *
diff --git a/perl.c b/perl.c
index 7a13310..8271915 100644
--- a/perl.c
+++ b/perl.c
@@ -1349,11 +1349,7 @@ perl_free(pTHXx)
PL_debug &= ~ DEBUG_m_FLAG;
}
while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
- safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next)
-# ifdef PERL_DEBUG_READONLY_COW
- + sizeof(IV)
-# endif
- );
+ safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
PL_debug = old_debug;
}
}
diff --git a/perl.h b/perl.h
index b5af943..ab2b028 100644
--- a/perl.h
+++ b/perl.h
@@ -4015,13 +4015,27 @@ EXTERN_C void PerlIO_teardown(void);
struct perl_memory_debug_header;
struct perl_memory_debug_header {
tTHX interpreter;
-# ifdef PERL_POISON
+# if defined(PERL_POISON) || defined(PERL_DEBUG_READONLY_COW)
MEM_SIZE size;
# endif
struct perl_memory_debug_header *prev;
struct perl_memory_debug_header *next;
+# ifdef PERL_DEBUG_READONLY_COW
+ bool readonly;
+# endif
+};
+
+#elif defined(PERL_DEBUG_READONLY_COW)
+
+struct perl_memory_debug_header;
+struct perl_memory_debug_header {
+ MEM_SIZE size;
};
+#endif
+
+#if defined (PERL_IMPLICIT_CONTEXT) || defined (PERL_DEBUG_READONLY_COW)
+
# define sTHX (sizeof(struct perl_memory_debug_header) + \
(MEM_ALIGNBYTES - sizeof(struct perl_memory_debug_header) \
%MEM_ALIGNBYTES) % MEM_ALIGNBYTES)
@@ -4031,12 +4045,21 @@ struct perl_memory_debug_header {
#endif
#ifdef PERL_TRACK_MEMPOOL
+# ifdef PERL_DEBUG_READONLY_COW
# define INIT_TRACK_MEMPOOL(header, interp) \
STMT_START { \
(header).interpreter = (interp); \
(header).prev = (header).next = &(header); \
+ (header).readonly = 0; \
} STMT_END
-# else
+# else
+# define INIT_TRACK_MEMPOOL(header, interp) \
+ STMT_START { \
+ (header).interpreter = (interp); \
+ (header).prev = (header).next = &(header); \
+ } STMT_END
+# endif
+# else
# define INIT_TRACK_MEMPOOL(header, interp)
#endif
diff --git a/sv.c b/sv.c
index 4bcaac9..f950317 100644
--- a/sv.c
+++ b/sv.c
@@ -4048,26 +4048,38 @@ S_glob_assign_ref(pTHX_ SV *const dstr, SV *const sstr)
#ifdef PERL_DEBUG_READONLY_COW
# include <sys/mman.h>
+# ifndef sTHX
+# define sTHX 0
+# endif
+
void
Perl_sv_buf_to_ro(pTHX_ SV *sv)
{
- char * const buf = SvPVX(sv)-sizeof(IV);
- const size_t len = (size_t)*(IV *)buf;
+ struct perl_memory_debug_header * const header =
+ (struct perl_memory_debug_header *)(SvPVX(sv)-sTHX);
+ const MEM_SIZE len = header->size;
PERL_ARGS_ASSERT_SV_BUF_TO_RO;
- if (mprotect(buf, len, PROT_READ))
+# ifdef PERL_TRACK_MEMPOOL
+ if (!header->readonly) header->readonly = 1;
+# endif
+ if (mprotect(header, len, PROT_READ))
Perl_warn(aTHX_ "mprotect RW for COW string %p %lu failed with %d",
- buf, len, errno);
+ header, len, errno);
}
void
Perl_sv_buf_to_rw(pTHX_ SV *sv)
{
- char * const buf = SvPVX(sv)-sizeof(IV);
- const size_t len = (size_t)*(IV *)buf;
+ struct perl_memory_debug_header * const header =
+ (struct perl_memory_debug_header *)(SvPVX(sv)-sTHX);
+ const MEM_SIZE len = header->size;
PERL_ARGS_ASSERT_SV_BUF_TO_RW;
- if (mprotect(buf, len, PROT_READ|PROT_WRITE))
+ if (mprotect(header, len, PROT_READ|PROT_WRITE))
Perl_warn(aTHX_ "mprotect for COW string %p %lu failed with %d",
- buf, len, errno);
+ header, len, errno);
+# ifdef PERL_TRACK_MEMPOOL
+ header->readonly = 0;
+# endif
}
#else
@@ -4577,7 +4589,7 @@ Perl_sv_setsv_cow(pTHX_ SV *dstr, SV *sstr)
STRLEN cur = SvCUR(sstr);
STRLEN len = SvLEN(sstr);
char *new_pv;
-#ifdef PERL_DEBUG_READONLY_COW
+#if defined(PERL_DEBUG_READONLY_COW) && defined(PERL_NEW_COPY_ON_WRITE)
const bool already = cBOOL(SvIsCOW(sstr));
#endif
diff --git a/t/op/threads.t b/t/op/threads.t
index 61889a9..6fb2410 100644
--- a/t/op/threads.t
+++ b/t/op/threads.t
@@ -135,7 +135,7 @@ EOI
#
# run-time usage of newCONSTSUB (as done by the IO boot code) wasn't
# thread-safe - got occasional coredumps or malloc corruption
-watchdog(60, "process");
+watchdog(180, "process");
{
local $SIG{__WARN__} = sub {}; # Ignore any thread creation failure warnings
my @t;
diff --git a/t/re/uniprops.t b/t/re/uniprops.t
index 19f011b..927f8a7 100644
--- a/t/re/uniprops.t
+++ b/t/re/uniprops.t
@@ -8,7 +8,6 @@ no warnings 'once';
# It is skipped by default under PERL_DEBUG_READONLY_COW, but you can run
# it directly via: cd t; ./perl ../lib/unicore/TestProp.pl
-@INC = '../lib';
require Config;
if ($Config::Config{ccflags} =~ /(?:^|\s)-DPERL_DEBUG_READONLY_COW\b/) {
print "1..0 # Skip PERL_DEBUG_READONLY_COW\n";
diff --git a/util.c b/util.c
index 84efc10..4427750 100644
--- a/util.c
+++ b/util.c
@@ -71,6 +71,40 @@ int putenv(char *);
# define ALWAYS_NEED_THX
#endif
+#if defined(PERL_TRACK_MEMPOOL) && defined(PERL_DEBUG_READONLY_COW)
+static void
+S_maybe_protect_rw(pTHX_ struct perl_memory_debug_header *header)
+{
+ if (header->readonly
+ && mprotect(header, header->size, PROT_READ|PROT_WRITE))
+ Perl_warn(aTHX_ "mprotect for COW string %p %lu failed with %d",
+ header, header->size, errno);
+}
+
+static void
+S_maybe_protect_ro(pTHX_ struct perl_memory_debug_header *header)
+{
+ if (header->readonly
+ && mprotect(header, header->size, PROT_READ))
+ Perl_warn(aTHX_ "mprotect RW for COW string %p %lu failed with %d",
+ header, header->size, errno);
+}
+# define maybe_protect_rw(foo) S_maybe_protect_rw(aTHX_ foo)
+# define maybe_protect_ro(foo) S_maybe_protect_ro(aTHX_ foo)
+#else
+# define maybe_protect_rw(foo) NOOP
+# define maybe_protect_ro(foo) NOOP
+#endif
+
+#if defined(PERL_TRACK_MEMPOOL) || defined(PERL_DEBUG_READONLY_COW)
+ /* Use memory_debug_header */
+# define USE_MDH
+# if (defined(PERL_POISON) && defined(PERL_TRACK_MEMPOOL)) \
+ || defined(PERL_DEBUG_READONLY_COW)
+# define MDH_HAS_SIZE
+# endif
+#endif
+
/* paranoid version of system's malloc() */
Malloc_t
@@ -80,16 +114,14 @@ Perl_safesysmalloc(MEM_SIZE size)
dTHX;
#endif
Malloc_t ptr;
-#ifdef PERL_TRACK_MEMPOOL
size += sTHX;
-#endif
#ifdef DEBUGGING
if ((SSize_t)size < 0)
Perl_croak_nocontext("panic: malloc, size=%"UVuf, (UV) size);
#endif
if (!size) size = 1; /* malloc(0) is NASTY on our system */
#ifdef PERL_DEBUG_READONLY_COW
- if ((ptr = mmap(0, size+sizeof(IV), PROT_READ|PROT_WRITE,
+ if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
perror("mmap failed");
abort();
@@ -99,7 +131,7 @@ Perl_safesysmalloc(MEM_SIZE size)
#endif
PERL_ALLOC_CHECK(ptr);
if (ptr != NULL) {
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef USE_MDH
struct perl_memory_debug_header *const header
= (struct perl_memory_debug_header *)ptr;
#endif
@@ -114,16 +146,17 @@ Perl_safesysmalloc(MEM_SIZE size)
header->prev = &PL_memory_debug_header;
header->next = PL_memory_debug_header.next;
PL_memory_debug_header.next = header;
+ maybe_protect_rw(header->next);
header->next->prev = header;
-# ifdef PERL_POISON
- header->size = size;
+ maybe_protect_ro(header->next);
+# ifdef PERL_DEBUG_READONLY_COW
+ header->readonly = 0;
# endif
- ptr = (Malloc_t)((char*)ptr+sTHX);
#endif
-#ifdef PERL_DEBUG_READONLY_COW
- *(IV *)ptr = (IV)size;
- ptr = (Malloc_t)((char*)ptr+sizeof(IV));
+#ifdef MDH_HAS_SIZE
+ header->size = size;
#endif
+ ptr = (Malloc_t)((char*)ptr+sTHX);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld \
bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); return ptr;
}
@@ -150,8 +183,9 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
#endif
Malloc_t ptr;
#ifdef PERL_DEBUG_READONLY_COW
- MEM_SIZE oldsize =
- where ? (MEM_SIZE)*(IV *)((char *)where - sizeof(IV)) : 0;
+ const MEM_SIZE oldsize = where
+ ? ((struct perl_memory_debug_header *)((char *)where - sTHX))->size
+ : 0;
#endif
#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
Malloc_t PerlMem_realloc();
@@ -164,16 +198,14 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
if (!where)
return safesysmalloc(size);
-#ifdef PERL_DEBUG_READONLY_COW
- where = (Malloc_t)((char*)where-sizeof(IV));
-#endif
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef USE_MDH
where = (Malloc_t)((char*)where-sTHX);
size += sTHX;
{
struct perl_memory_debug_header *const header
= (struct perl_memory_debug_header *)where;
+# ifdef PERL_TRACK_MEMPOOL
if (header->interpreter != aTHX) {
Perl_croak_nocontext("panic: realloc from wrong pool, %p!=%p",
header->interpreter, aTHX);
@@ -186,8 +218,11 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
char *start_of_freed = ((char *)where) + size;
PoisonFree(start_of_freed, freed_up, char);
}
- header->size = size;
# endif
+# endif
+# ifdef MDH_HAS_SIZE
+ header->size = size;
+# endif
}
#endif
#ifdef DEBUGGING
@@ -195,13 +230,13 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
Perl_croak_nocontext("panic: realloc, size=%"UVuf, (UV)size);
#endif
#ifdef PERL_DEBUG_READONLY_COW
- if ((ptr = mmap(0, size+sizeof(IV), PROT_READ|PROT_WRITE,
+ if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
perror("mmap failed");
abort();
}
- Copy(where,ptr,(oldsize < size ? oldsize : size)+sizeof(IV),char);
- if (munmap(where, oldsize+sizeof(IV))) {
+ Copy(where,ptr,oldsize < size ? oldsize : size,char);
+ if (munmap(where, oldsize)) {
perror("munmap failed");
abort();
}
@@ -213,8 +248,8 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
/* MUST do this fixup first, before doing ANYTHING else, as anything else
might allocate memory/free/move memory, and until we do the fixup, it
may well be chasing (and writing to) free memory. */
-#ifdef PERL_TRACK_MEMPOOL
if (ptr != NULL) {
+#ifdef PERL_TRACK_MEMPOOL
struct perl_memory_debug_header *const header
= (struct perl_memory_debug_header *)ptr;
@@ -226,18 +261,15 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
}
# endif
+ maybe_protect_rw(header->next);
header->next->prev = header;
+ maybe_protect_ro(header->next);
+ maybe_protect_rw(header->prev);
header->prev->next = header;
-
- ptr = (Malloc_t)((char*)ptr+sTHX);
- }
+ maybe_protect_ro(header->prev);
#endif
-#ifdef PERL_DEBUG_READONLY_COW
- if (ptr) {
- *(IV *)ptr = (IV)size;
- ptr = (Malloc_t)((char *)ptr + sizeof(IV));
+ ptr = (Malloc_t)((char*)ptr+sTHX);
}
-#endif
/* In particular, must do that fixup above before logging anything via
*printf(), as it can reallocate memory, which can cause SEGVs. */
@@ -274,16 +306,16 @@ Perl_safesysfree(Malloc_t where)
#endif
DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) \
free\n",PTR2UV(where),(long)PL_an++)); if (where) {
-#ifdef PERL_DEBUG_READONLY_COW
- MEM_SIZE size = (MEM_SIZE)*(IV *)((char *)where - sizeof(IV));
- where = (Malloc_t)((char *)where - sizeof(IV));
-#endif
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef USE_MDH
where = (Malloc_t)((char*)where-sTHX);
{
struct perl_memory_debug_header *const header
= (struct perl_memory_debug_header *)where;
+# ifdef MDH_HAS_SIZE
+ const MEM_SIZE size = header->size;
+# endif
+# ifdef PERL_TRACK_MEMPOOL
if (header->interpreter != aTHX) {
Perl_croak_nocontext("panic: free from wrong pool, %p!=%p",
header->interpreter, aTHX);
@@ -300,21 +332,28 @@ Perl_safesysfree(Malloc_t where)
header->prev->next);
}
/* Unlink us from the chain. */
+ maybe_protect_rw(header->next);
header->next->prev = header->prev;
+ maybe_protect_ro(header->next);
+ maybe_protect_rw(header->prev);
header->prev->next = header->next;
+ maybe_protect_ro(header->prev);
+ maybe_protect_rw(header);
# ifdef PERL_POISON
- PoisonNew(where, header->size, char);
+ PoisonNew(where, size, char);
# endif
/* Trigger the duplicate free warning. */
header->next = NULL;
+# endif
+# ifdef PERL_DEBUG_READONLY_COW
+ if (munmap(where, size)) {
+ perror("munmap failed");
+ abort();
+ }
+# endif
}
#endif
-#ifdef PERL_DEBUG_READONLY_COW
- if (munmap(where, size+sizeof(IV))) {
- perror("munmap failed");
- abort();
- }
-#else
+#ifndef PERL_DEBUG_READONLY_COW
PerlMem_free(where);
#endif
}
@@ -325,26 +364,23 @@ Perl_safesysfree(Malloc_t where)
Malloc_t
Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
{
-#ifdef PERL_DEBUG_READONLY_COW
- return Perl_safesysmalloc(count*size);
-#else
#ifdef ALWAYS_NEED_THX
dTHX;
#endif
Malloc_t ptr;
-#if defined(PERL_TRACK_MEMPOOL) || defined(DEBUGGING)
+#if defined(USE_MDH) || defined(DEBUGGING)
MEM_SIZE total_size = 0;
#endif
/* Even though calloc() for zero bytes is strange, be robust. */
if (size && (count <= MEM_SIZE_MAX / size)) {
-#if defined(PERL_TRACK_MEMPOOL) || defined(DEBUGGING)
+#if defined(USE_MDH) || defined(DEBUGGING)
total_size = size * count;
#endif
}
else
croak_memory_wrap();
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef USE_MDH
if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
total_size += sTHX;
else
@@ -355,7 +391,13 @@ Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
Perl_croak_nocontext("panic: calloc, size=%"UVuf", count=%"UVuf,
(UV)size, (UV)count);
#endif
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef PERL_DEBUG_READONLY_COW
+ if ((ptr = mmap(0, total_size ? total_size : 1, PROT_READ|PROT_WRITE,
+ MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
+ perror("mmap failed");
+ abort();
+ }
+#elif defined(PERL_TRACK_MEMPOOL)
/* Have to use malloc() because we've added some space for our tracking
header. */
/* malloc(0) is non-portable. */
@@ -371,19 +413,28 @@ Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
PERL_ALLOC_CHECK(ptr);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld \
bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size)); if (ptr != NULL) \
{
-#ifdef PERL_TRACK_MEMPOOL
+#ifdef USE_MDH
{
struct perl_memory_debug_header *const header
= (struct perl_memory_debug_header *)ptr;
+# ifndef PERL_DEBUG_READONLY_COW
memset((void*)ptr, 0, total_size);
+# endif
+# ifdef PERL_TRACK_MEMPOOL
header->interpreter = aTHX;
/* Link us into the list. */
header->prev = &PL_memory_debug_header;
header->next = PL_memory_debug_header.next;
PL_memory_debug_header.next = header;
+ maybe_protect_rw(header->next);
header->next->prev = header;
-# ifdef PERL_POISON
+ maybe_protect_ro(header->next);
+# ifdef PERL_DEBUG_READONLY_COW
+ header->readonly = 0;
+# endif
+# endif
+# ifdef MDH_HAS_SIZE
header->size = total_size;
# endif
ptr = (Malloc_t)((char*)ptr+sTHX);
@@ -399,7 +450,6 @@ Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
return NULL;
croak_no_mem();
}
-#endif /* PERL_DEBUG_READONLY_COW */
}
/* These must be defined when not using Perl's malloc for binary
--
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