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From: John R. <jr...@bi...> - 2013-06-01 21:18:28
|
> I have no idea about the initial status of shadow memory. > > Take a simple arm executable as an example: > $ arm-linux-gnueabi-objdump -S MallocNor-RW > ... > Disassembly of section .text: > > 00008340 <_start>: > 8340:f04f 0b00 mov.wfp, #0 > 8344:f04f 0e00 mov.wlr, #0 > 8348:f85d 1b04 ldr.wr1, [sp], #4 > ... > > In 8348, CPU load [sp] into r1 and increment sp by 4. > Which status should the shadow value of [sp] and r1 be? defined, uninitialized or unaddressable? Remember that valgrind is a co-resident emulator which lives in the same process and address space while valgrind loads and "invokes" your program. The Linux kernel invokes valgrind via execve() from your shell, and the Linux kernel is "unaware" that valgrind is an emulator. Because valgrind does the loading of your program, then valgrind already knows the layout that the emulated program has. Valgrind also sets the register contents that are seen by the emulated program, so valgrind also knows about that, too. The only "magic" involved is trimming the valgrind arguments from the leading positions of valgrind's own argv[], plus some minor editing of environ[] and some other small pieces of valgrind's original stack. > If I want to understand what Valgrind initialize the shadow, which files should I take a look? coregrind/m_aspacemgr/ and the callers from memcheck/ coregrind/pub_core_aspacemgr.h coregrind/m_initimg/initimg-linux.c [It should not have been difficult to answer that question yourself.] -- |
|
From: Philippe W. <phi...@sk...> - 2013-06-01 03:36:19
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8) GDB: GNU gdb (GDB) Fedora (7.5.1-37.fc18) Assembler: GNU assembler version 2.23.51.0.1-7.fc18 20120806 C library: GNU C Library stable release version 2.16 uname -mrs: Linux 3.7.2-204.fc18.ppc64 ppc64 Vendor version: Fedora release 18 (Spherical Cow) Nightly build on gcc110 ( Fedora release 18 (Spherical Cow), ppc64 ) Started at 2013-05-31 20:00:21 PDT Ended at 2013-05-31 20:35:59 PDT Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 557 tests, 31 stderr failures, 3 stdout failures, 0 stderrB failures, 0 stdoutB failures, 2 post failures == memcheck/tests/linux/getregset (stdout) memcheck/tests/linux/getregset (stderr) memcheck/tests/ppc64/power_ISA2_05 (stdout) memcheck/tests/supp_unknown (stderr) memcheck/tests/varinfo6 (stderr) memcheck/tests/wrap8 (stdout) memcheck/tests/wrap8 (stderr) massif/tests/big-alloc (post) massif/tests/deep-D (post) helgrind/tests/annotate_rwlock (stderr) helgrind/tests/free_is_write (stderr) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/locked_vs_unlocked1_fwd (stderr) helgrind/tests/locked_vs_unlocked1_rev (stderr) helgrind/tests/locked_vs_unlocked2 (stderr) helgrind/tests/locked_vs_unlocked3 (stderr) helgrind/tests/pth_barrier1 (stderr) helgrind/tests/pth_barrier2 (stderr) helgrind/tests/pth_barrier3 (stderr) helgrind/tests/pth_destroy_cond (stderr) helgrind/tests/rwlock_race (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc06_two_races_xml (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 03:29:27
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8) GDB: Assembler: GNU assembler version 2.18.50.0.6-2 20080403 C library: GNU C Library stable release version 2.8 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 9 (Sulphur) Nightly build on bristol ( x86_64, Fedora 9 ) Started at 2013-06-01 03:55:11 BST Ended at 2013-06-01 04:29:12 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 632 tests, 1 stderr failure, 1 stdout failure, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/amd64/insn-pcmpistri (stderr) none/tests/amd64/sse4-64 (stdout) |
|
From: Tom H. <to...@co...> - 2013-06-01 03:14:33
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.4.5 20101112 (Red Hat 4.4.5-2) GDB: Assembler: GNU assembler version 2.20.51.0.2-20.fc13 20091009 C library: GNU C Library stable release version 2.12.2 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 13 (Goddard) Nightly build on bristol ( x86_64, Fedora 13 ) Started at 2013-06-01 03:36:15 BST Ended at 2013-06-01 04:14:14 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 634 tests, 2 stderr failures, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/cond_ld (stderr) helgrind/tests/pth_barrier3 (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 03:12:41
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.4.1 20090725 (Red Hat 4.4.1-2) GDB: Assembler: GNU assembler version 2.19.51.0.14-3.fc11 20090722 C library: GNU C Library stable release version 2.10.2 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 11 (Leonidas) Nightly build on bristol ( x86_64, Fedora 11 ) Started at 2013-06-01 03:41:58 BST Ended at 2013-06-01 04:12:22 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 634 tests, 2 stderr failures, 1 stdout failure, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/cond_ld (stderr) memcheck/tests/long_namespace_xml (stderr) none/tests/amd64/sse4-64 (stdout) |
|
From: Tom H. <to...@co...> - 2013-06-01 03:07:19
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2) GDB: GNU gdb (GDB) Fedora (7.3.1-48.fc15) Assembler: GNU assembler version 2.21.51.0.6-6.fc15 20110118 C library: GNU C Library stable release version 2.14.1 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 15 (Lovelock) Nightly build on bristol ( x86_64, Fedora 15 ) Started at 2013-06-01 03:20:05 BST Ended at 2013-06-01 04:07:01 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 1 stderr failure, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/origin5-bz2 (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 03:07:06
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4) GDB: GNU gdb (GDB) Fedora (7.2-52.fc14) Assembler: GNU assembler version 2.20.51.0.7-8.fc14 20100318 C library: GNU C Library stable release version 2.13 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 14 (Laughlin) Nightly build on bristol ( x86_64, Fedora 14 ) Started at 2013-06-01 03:22:40 BST Ended at 2013-06-01 04:06:47 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 653 tests, 1 stderr failure, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/origin5-bz2 (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 02:46:03
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2) GDB: GNU gdb (GDB) Fedora (7.3.50.20110722-16.fc16) Assembler: GNU assembler version 2.21.53.0.1-6.fc16 20110716 C library: GNU C Library development release version 2.14.90 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 16 (Verne) Nightly build on bristol ( x86_64, Fedora 16 ) Started at 2013-06-01 03:03:37 BST Ended at 2013-06-01 03:45:47 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 1 stderr failure, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/origin5-bz2 (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 02:29:48
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.7.2 20120921 (Red Hat 4.7.2-2) GDB: GNU gdb (GDB) Fedora (7.4.50.20120120-54.fc17) Assembler: GNU assembler version 2.22.52.0.1-10.fc17 20120131 C library: GNU C Library stable release version 2.15 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 17 (Beefy Miracle) Nightly build on bristol ( x86_64, Fedora 17 (Beefy Miracle) ) Started at 2013-06-01 02:52:43 BST Ended at 2013-06-01 03:29:29 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 5 stderr failures, 1 stdout failure, 0 stderrB failures, 0 stdoutB failures, 0 post failures == gdbserver_tests/mcinfcallRU (stderr) gdbserver_tests/mcinfcallWSRU (stderr) gdbserver_tests/mcmain_pic (stderr) memcheck/tests/origin5-bz2 (stderr) exp-sgcheck/tests/preen_invars (stdout) exp-sgcheck/tests/preen_invars (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 02:21:20
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8) GDB: GNU gdb (GDB) Fedora (7.5.1-38.fc18) Assembler: GNU assembler version 2.23.51.0.1-6.fc18 20120806 C library: GNU C Library stable release version 2.16 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 18 (Spherical Cow) Nightly build on bristol ( x86_64, Fedora 18 (Spherical Cow) ) Started at 2013-06-01 02:45:19 BST Ended at 2013-06-01 03:21:02 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 2 stderr failures, 1 stdout failure, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/origin5-bz2 (stderr) exp-sgcheck/tests/preen_invars (stdout) exp-sgcheck/tests/preen_invars (stderr) |
|
From: Christian B. <bor...@de...> - 2013-06-01 02:15:09
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (SUSE Linux) 4.3.4 [gcc-4_3-branch revision 152973] GDB: GNU gdb (GDB) SUSE (7.3-0.6.1) Assembler: GNU assembler (GNU Binutils; SUSE Linux Enterprise 11) 2.21.1 C library: GNU C Library stable release version 2.11.3 (20110527) uname -mrs: Linux 3.0.58-0.6.6-default s390x Vendor version: Welcome to SUSE Linux Enterprise Server 11 SP2 (s390x) - Kernel %r (%t). Nightly build on sless390 ( SUSE Linux Enterprise Server 11 SP1 gcc 4.3.4 on z196 (s390x) ) Started at 2013-06-01 03:45:01 CEST Ended at 2013-06-01 04:14:58 CEST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 635 tests, 0 stderr failures, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == |
|
From: Christian B. <bor...@de...> - 2013-06-01 02:15:09
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.6.1 20110908 (Red Hat 4.6.1-9bb4) GDB: GNU gdb (GDB) Fedora (7.5-1bb1.fc15) Assembler: GNU assembler version 2.21.51.0.6-6bb6.fc15 20110118 C library: GNU C Library stable release version 2.14.1 uname -mrs: Linux 3.8.6-60.x.20130412-s390xperformance s390x Vendor version: unknown Nightly build on fedora390 ( Fedora 15 with devel libc/toolchain on z196 (s390x) ) Started at 2013-06-01 03:45:01 CEST Ended at 2013-06-01 04:15:21 CEST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 636 tests, 2 stderr failures, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) |
|
From: Tom H. <to...@co...> - 2013-06-01 02:08:07
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.8.0 20130517 (Red Hat 4.8.0-6) GDB: GNU gdb (GDB) Fedora (7.6-29.fc19) Assembler: GNU assembler version 2.23.52.0.1-8.fc19 20130226 C library: GNU C Library (GNU libc) stable release version 2.17 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 19 (Schrödingerâs Cat) Nightly build on bristol ( x86_64, Fedora 19 (Schrödingerâs Cat) ) Started at 2013-06-01 02:33:26 BST Ended at 2013-06-01 03:07:48 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 3 stderr failures, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/dw4 (stderr) memcheck/tests/origin5-bz2 (stderr) exp-sgcheck/tests/hackedbz2 (stderr) |
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From: Tom H. <to...@co...> - 2013-06-01 01:53:30
|
valgrind revision: 13413 VEX revision: 2724 C compiler: gcc (GCC) 4.8.0 20130526 (Red Hat 4.8.0-8) GDB: GNU gdb (GDB) Fedora (7.6-31.fc20) Assembler: GNU assembler version 2.23.2 C library: GNU C Library (GNU libc) stable release version 2.17 uname -mrs: Linux 3.8.6-203.fc18.x86_64 x86_64 Vendor version: Fedora release 20 (Rawhide) Nightly build on bristol ( x86_64, Fedora 20 ) Started at 2013-06-01 02:23:25 BST Ended at 2013-06-01 02:53:14 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 655 tests, 3 stderr failures, 0 stdout failures, 0 stderrB failures, 0 stdoutB failures, 0 post failures == memcheck/tests/dw4 (stderr) memcheck/tests/origin5-bz2 (stderr) exp-sgcheck/tests/hackedbz2 (stderr) |