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Fri, 28 Jul 2023 19:31:27 +0200 From: Helge Deller To: qemu-devel@nongnu.org Cc: Laurent Vivier , Paolo Bonzini , Richard Henderson , Helge Deller Subject: [PATCH v5 1/3] linux-user: Show heap address in /proc/pid/maps Date: Fri, 28 Jul 2023 19:31:24 +0200 Message-ID: <20230728173127.259192-2-deller@gmx.de> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230728173127.259192-1-deller@gmx.de> References: <20230728173127.259192-1-deller@gmx.de> MIME-Version: 1.0 X-Provags-ID: V03:K1:TZwdUk5CRXSEucmFv+vgl6gBXD/IVTDsb3Iu46EFkIVUknyoImh vwm/JCAO1wXxUEMP529BuXkCQvmK7yerMwzzYAbdWeeJJTZ+oEwiMzDE8Ad9OXVUlSEXvIB 6GYGQ5jik0+iJH7ufhAPEm9LjWQHBe85OXhP1xPD9mmQ+Xb6aZI9RgaCtTN2o8EA47sypAi GOecQ3j+4HVmv5P7LHp4g== UI-OutboundReport: notjunk:1;M01:P0:nkvVeSt3Lp0=;6URYg1+A3bTF3ldU/WBW8GFaGpb f8r49/Nxc1xbtIvvAS+yTGORWIq2Su1nuJcTA+S4OujS1pPd5n7o41gWJ+oiMSyiiCQA2d4Fd LuDJ50hy4HtNBumsWDAaWhZr9ppJlPhOjlwnDg37W/9JY+7g3EmxuQUHNxJhGVwX2TnysaPG5 8hvc10AC96WwdM3y5Oo4bxfwLheisnLZ0FmFSiTVBnahpHDBqCkDvEu6RjfEkyP7QfDwDJYtZ QRWK5JDEU66fVLWbheAyH3Ia/1nkaAMuBTDiron8Ciei/kbbOoSAWvmuBVpYk22ArCqUL3IEe 9k54edOaY3gPOylD6mDp91CEr8UwWnI+wq0F6f6f5pqWGlWX9oo5QbT0HCYQzmXaH2e34zVlq /f84iYzcPSk08BstmNH4Is1CmPnhTScOuLTntk3/vTVYYkNby7JlW6FH1vCur5X8m8qDDn9+x XZ88cuewsfQlYV6YC0+Te/Flu78QFaCB5A+1/caRyI6o7sDrHI0GWaP39LRBqm3ynNjmS/3f9 6pAcPjaqeUwAkH08YpNnQIAukTOMvcdFNUsAteGdAUW4efdRvwt9cm602ss0dBht6N4HMl5kq G7RP+4X+Hvo+cKE6DEkie4soHD5ZJBiAZRnwkLFxIe7wuV+cLQOvQ/8VBC6eAv9qz3yvToHYA DgfNrrFkHb3+anPpIsjAHFbz/zR6m6BlqU8woUpRaGC1vGTyBq0v7CU1YA//NsJktp+o/aKLR aICbiiMZB2lkb833G1p1AMyWhBClpSbKgJI5kHpIjlE+osb3Zs8hS4LLV4TKPRySqpptDPFz+ 8NgYNj4aKKI2zI1MFzKhQnSVi5jRmSDT2JWov2zwyrWinPhmjsaGUb4TkBFtvZ/cyYnoqQn8U h94jgjQMoMsYe2y2sQkV/sAf5pAq3AuWOMkiH586+8DtUO6tKAXNu3I0S/y77SJr3IUSBI7tW 0r/V1HunqClI+G0MpqfeJnaCC5A= Received-SPF: pass client-ip=212.227.15.19; envelope-from=deller@gmx.de; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Show the memory location of the heap in the /proc/pid/maps file inside the guest. Store the heap address in ts->heap_base, which requires to make that variable accessible for all guest architectures, not just architectures for semihosted binaries (arm, m68k, riscv). Note that /proc/pid/maps in the guest needs to show target-aligned addresses. This is fixed in this patch, so now the heap and stack address for architectures like sparc64 and alpha now show up in that output as well. Show 32- and 64-bit pointers with 8 digits and leading zeros (%08x/%08lx). For 64-bit we could use %16lx, but we mimic the Linux kernel, which shows even 64-bit addresses with %08lx. Example: user@machine:/# uname -a Linux paq 5.15.88+ #47 SMP Sun Jan 15 12:53:11 CET 2023 aarch64 GNU/Linux user@machine:/# cat /proc/self/maps Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 aarch64 GNU/Linux 5500000000-5500009000 r-xp 00000000 fd:00 570430 /usr/bin/cat 5500009000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 570430 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 570430 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rw-p 00000000 00:00 0 [stack] 7000801000-7000827000 r-xp 00000000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000827000-700083f000 ---p 00000000 00:00 0 700083f000-7000841000 r--p 0002e000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000841000-7000843000 rw-p 00030000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000843000-7000844000 r-xp 00000000 00:00 0 7000844000-7000846000 rw-p 00000000 00:00 0 7000850000-70009d7000 r-xp 00000000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009d7000-70009ed000 ---p 00187000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009ed000-70009f0000 r--p 0018d000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009f0000-70009f2000 rw-p 00190000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 Signed-off-by: Helge Deller --- include/exec/cpu_ldst.h | 4 ++-- linux-user/main.c | 2 ++ linux-user/qemu.h | 4 ++-- linux-user/syscall.c | 13 +++++++++---- 4 files changed, 15 insertions(+), 8 deletions(-) -- 2.41.0 diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h index 645476f0e5..f1e6f31e88 100644 --- a/include/exec/cpu_ldst.h +++ b/include/exec/cpu_ldst.h @@ -72,10 +72,10 @@ */ #if TARGET_VIRT_ADDR_SPACE_BITS <= 32 typedef uint32_t abi_ptr; -#define TARGET_ABI_FMT_ptr "%x" +#define TARGET_ABI_FMT_ptr "%08x" #else typedef uint64_t abi_ptr; -#define TARGET_ABI_FMT_ptr "%"PRIx64 +#define TARGET_ABI_FMT_ptr "%08"PRIx64 #endif #ifndef TARGET_TAGGED_ADDRESSES diff --git a/linux-user/main.c b/linux-user/main.c index dba67ffa36..fa6e47510f 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -946,6 +946,7 @@ int main(int argc, char **argv, char **envp) } } + info->brk = TARGET_PAGE_ALIGN(info->brk); target_set_brk(info->brk); syscall_init(); signal_init(); @@ -955,6 +956,7 @@ int main(int argc, char **argv, char **envp) the real value of GUEST_BASE into account. */ tcg_prologue_init(tcg_ctx); + ts->heap_base = info->brk; target_cpu_copy_regs(env, regs); if (gdbstub) { diff --git a/linux-user/qemu.h b/linux-user/qemu.h index 802794db63..7a6adac637 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -121,11 +121,11 @@ typedef struct TaskState { #ifdef TARGET_M68K abi_ulong tp_value; #endif -#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_RISCV) + /* Extra fields for semihosted binaries. */ abi_ulong heap_base; abi_ulong heap_limit; -#endif + abi_ulong stack_base; int used; /* non zero if used */ struct image_info *info; diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 95727a816a..54abf273dd 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8119,8 +8119,9 @@ static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps) MapInfo *e = (MapInfo *) s->data; if (h2g_valid(e->start)) { - unsigned long min = e->start; - unsigned long max = e->end; + /* show page granularity of guest in /proc/pid/maps */ + unsigned long min = TARGET_PAGE_ALIGN(e->start); + unsigned long max = TARGET_PAGE_ALIGN(e->end); int flags = page_get_flags(h2g(min)); const char *path; @@ -8131,14 +8132,18 @@ static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps) continue; } + path = e->path; + + if (ts->heap_base && h2g(min) == ts->heap_base) { + path = "[heap]"; + } + #ifdef TARGET_HPPA if (h2g(max) == ts->info->stack_limit) { #else if (h2g(min) == ts->info->stack_limit) { #endif path = "[stack]"; - } else { - path = e->path; } count = dprintf(fd, TARGET_ABI_FMT_ptr "-" TARGET_ABI_FMT_ptr