Date: Wed, 20 Sep 2023 18:17:40 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 273956] KERN_PROC_VMMAP does not read all mapped files Message-ID: <bug-273956-227-PsNR7JlEfW@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-273956-227@https.bugs.freebsd.org/bugzilla/> References: <bug-273956-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273956 --- Comment #5 from Ed Maste <emaste@freebsd.org> --- Ok, I can stop it there: (lldb) b parse_procselfmaps Breakpoint 1: where =3D memcheck-amd64-freebsd`parse_procselfmaps + 37 at aspacemgr-linux.c:3926:12, address =3D 0x0000000038133885 (lldb) run Process 30476 launched: '/home/emaste/src/valgrind/memcheck/memcheck-amd64-freebsd' (x86_64) Process 30476 stopped * thread #1, name =3D 'memcheck-amd64-f', stop reason =3D breakpoint 1.1 frame #0: 0x0000000038133885 memcheck-amd64-freebsd`parse_procselfmaps(record_mapping=3D(memcheck-amd64-= freebsd`read_maps_callback at aspacemgr-linux.c:1533), record_gap=3D0x0000000000000000) at aspacemgr-linux.c:3926:12 3923 3924 foffset =3D ino =3D 0; /* keep gcc-4.1.0 happy */ 3925 -> 3926 oid[0] =3D VKI_CTL_KERN; 3927 oid[1] =3D VKI_KERN_PROC; 3928 oid[2] =3D VKI_KERN_PROC_VMMAP; 3929 oid[3] =3D sr_Res(VG_(do_syscall0)(__NR_getpid)); and see this mapping: PID START END PRT RES PRES REF SHD FLAG TP = PATH 30476 0x38000000 0x380c4000 r-- 196 2535 3 1 CN--- vn /usr/home/emaste/src/valgrind/memcheck/memcheck-amd64-freebsd 30476 0x380c4000 0x38273000 r-x 431 0 1 0 C---- vn /usr/home/emaste/src/valgrind/memcheck/memcheck-amd64-freebsd 30476 0x38273000 0x3a851000 rw- 9 9 1 0 ----- sw= =20 30476 0x838a5f000 0x858a3f000 --- 0 0 0 0 ----- gd= =20 30476 0x858a3f000 0x858a5f000 rw- 1 1 1 0 ---D- sw= =20 30476 0x8592e4000 0x8592e5000 r-x 1 1 116 0 ----- ph= =20 30476 0x7ffffffff000 0x800000000000 --- 0 0 0 0 ----- gd= =20 ELF phdrs show: Program Headers: Type Offset VirtAddr PhysAddr FileSiz Me= mSiz Flg Align PHDR 0x000040 0x0000000038000040 0x0000000038000040 0x000188 0x000188 R 0x8 LOAD 0x000000 0x0000000038000000 0x0000000038000000 0x0c31d4 0x0c31d4 R 0x1000 LOAD 0x0c31e0 0x00000000380c41e0 0x00000000380c41e0 0x1adf8f 0x1adf8f R E 0x1000 LOAD 0x271170 0x0000000038273170 0x0000000038273170 0x000a90 0x25dcfe0 RW 0x1000 GNU_EH_FRAME 0x0941e0 0x00000000380941e0 0x00000000380941e0 0x006a2c 0x006a2c R 0x4 GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW 0x0 NOTE 0x0001c8 0x00000000380001c8 0x00000000380001c8 0x000030 0x000030 R 0x4 So the `rw-` mapping doesn't disappear, it just becomes `sw`. Will update with more later --=20 You are receiving this mail because: You are the assignee for the bug.=
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