weird... On Tue, Sep 3, 2024, 14:13 Alex Bennée <alex.ben...@linaro.org> wrote:
> Alex Bennée <alex.ben...@linaro.org> writes: > > > Elisha Hollander <just4now666...@gmail.com> writes: > > > >> Sure! > >> > >> `build/qemu-system-i386 -plugin build/contrib/plugins/libips.so,ips=1 > -display curses -bios bios.raw` > >> > >> Also, I just tested with 9.1.0-rc4 and it resulted with > >> `tcg.c:3167:remove_label_use: code should not be reached` > > > > I can replicate but it seems to be an edge case with ips=1, try a higher > > number, even ips=10 doesn't trigger the crash (but 10 instructions a > > second is very slow to do anything). > > > > ./qemu-system-i386 -plugin contrib/plugins/libips.so,ips=1 -display > none -serial mon:stdio > > ** > > ERROR:../../tcg/tcg.c:3167:remove_label_use: code should not be reached > > Bail out! ERROR:../../tcg/tcg.c:3167:remove_label_use: code should not > be reached > > fish: Job 1, './qemu-system-i386 -plugin con…' terminated by signal > > SIGABRT (Abort) > > Well this is fascinating and I suspect Richard needs to comment but: > > ./qemu-system-i386 -plugin contrib/plugins/libips.so,ips=9 -display > none -serial mon:stdio -d in_asm,op,op_opt,out_asm -plugin > contrib/plugins/libstoptrigger.so,icount=20 -D broken.log > ** > ERROR:../../tcg/tcg.c:3167:remove_label_use: code should not be reached > Bail out! ERROR:../../tcg/tcg.c:3167:remove_label_use: code should not > be reached > fish: Job 1, './qemu-system-i386 -plugin con…' terminated by signal > SIGABRT (Abort) > > and: > > ./qemu-system-i386 -plugin contrib/plugins/libips.so,ips=10 -display > none -serial mon:stdio -d in_asm,op,op_opt,out_asm -plugin > contrib/plugins/libstoptrigger.so,icount=20 -D working.log > > But for the life of me I can't see the difference between the two sets > of input, the first crashes before the optimisation step: > > PROLOGUE: [size=45] > 0x7f2198000000: 55 pushq %rbp > 0x7f2198000001: 53 pushq %rbx > 0x7f2198000002: 41 54 pushq %r12 > 0x7f2198000004: 41 55 pushq %r13 > 0x7f2198000006: 41 56 pushq %r14 > 0x7f2198000008: 41 57 pushq %r15 > 0x7f219800000a: 48 8b ef movq %rdi, %rbp > 0x7f219800000d: 48 81 c4 78 fb ff ff addq $-0x488, %rsp > 0x7f2198000014: ff e6 jmpq *%rsi > 0x7f2198000016: 33 c0 xorl %eax, %eax > 0x7f2198000018: 48 81 c4 88 04 00 00 addq $0x488, %rsp > 0x7f219800001f: c5 f8 77 vzeroupper > 0x7f2198000022: 41 5f popq %r15 > 0x7f2198000024: 41 5e popq %r14 > 0x7f2198000026: 41 5d popq %r13 > 0x7f2198000028: 41 5c popq %r12 > 0x7f219800002a: 5b popq %rbx > 0x7f219800002b: 5d popq %rbp > 0x7f219800002c: c3 retq > > ---------------- > IN: > 0xfffffff0: ea 5b e0 00 f0 ljmpw $0xf000:$0xe05b > > OP: > ld_i32 loc9,env,$0xfffffffffffffff8 > brcond_i32 loc9,$0x0,lt,$L0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > mul_i32 tmp18,tmp18,$0x18 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55912c381e38 > ld_i64 tmp21,tmp17,$0x0 > add_i64 tmp21,tmp21,$0x1 > st_i64 tmp21,tmp17,$0x0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > mul_i32 tmp18,tmp18,$0x18 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55912c381e38 > ld_i64 tmp21,tmp17,$0x0 > brcond_i64 tmp21,$0x0,ltu,$L1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > call plugin(0x7f21efe82550),$0x1,$0,tmp18,$0x0 > set_label $L1 > st8_i32 $0x1,env,$0xfffffffffffffffc > > ---- 0000000000000ff0 0000000000000000 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > shl_i32 tmp18,tmp18,$0x3 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55912c3803b0 > ld_i64 tmp21,tmp17,$0x0 > add_i64 tmp21,tmp21,$0x1 > st_i64 tmp21,tmp17,$0x0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > shl_i32 tmp18,tmp18,$0x3 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55912c3803b0 > ld_i64 tmp21,tmp17,$0x0 > brcond_i64 tmp21,$0x15,ne,$L2 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > call plugin(0x7f21efe7d420),$0x1,$0,tmp18,$0xfffffff0 > set_label $L2 > mov_i32 loc0,$0xe05b > mov_i32 loc1,$0xf000 > ext16u_i32 loc13,loc1 > st_i32 loc13,env,$0x54 > shl_i32 cs_base,loc13,$0x4 > mov_i32 eip,loc0 > call lookup_tb_ptr,$0x6,$1,tmp15,env > goto_ptr tmp15 > set_label $L0 > exit_tb $0x7f2198000043 > > BOOM!!! > > and the working case: > > PROLOGUE: [size=45] > 0x7f110c000000: 55 pushq %rbp > 0x7f110c000001: 53 pushq %rbx > 0x7f110c000002: 41 54 pushq %r12 > 0x7f110c000004: 41 55 pushq %r13 > 0x7f110c000006: 41 56 pushq %r14 > 0x7f110c000008: 41 57 pushq %r15 > 0x7f110c00000a: 48 8b ef movq %rdi, %rbp > 0x7f110c00000d: 48 81 c4 78 fb ff ff addq $-0x488, %rsp > 0x7f110c000014: ff e6 jmpq *%rsi > 0x7f110c000016: 33 c0 xorl %eax, %eax > 0x7f110c000018: 48 81 c4 88 04 00 00 addq $0x488, %rsp > 0x7f110c00001f: c5 f8 77 vzeroupper > 0x7f110c000022: 41 5f popq %r15 > 0x7f110c000024: 41 5e popq %r14 > 0x7f110c000026: 41 5d popq %r13 > 0x7f110c000028: 41 5c popq %r12 > 0x7f110c00002a: 5b popq %rbx > 0x7f110c00002b: 5d popq %rbp > 0x7f110c00002c: c3 retq > > ---------------- > IN: > 0xfffffff0: ea 5b e0 00 f0 ljmpw $0xf000:$0xe05b > > OP: > ld_i32 loc9,env,$0xfffffffffffffff8 > brcond_i32 loc9,$0x0,lt,$L0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > mul_i32 tmp18,tmp18,$0x18 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55c2cb346e38 > ld_i64 tmp21,tmp17,$0x0 > add_i64 tmp21,tmp21,$0x1 > st_i64 tmp21,tmp17,$0x0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > mul_i32 tmp18,tmp18,$0x18 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55c2cb346e38 > ld_i64 tmp21,tmp17,$0x0 > brcond_i64 tmp21,$0x1,ltu,$L1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > call plugin(0x7f11633ab550),$0x1,$0,tmp18,$0x0 > set_label $L1 > st8_i32 $0x1,env,$0xfffffffffffffffc > > ---- 0000000000000ff0 0000000000000000 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > shl_i32 tmp18,tmp18,$0x3 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55c2cb3453b0 > ld_i64 tmp21,tmp17,$0x0 > add_i64 tmp21,tmp21,$0x1 > st_i64 tmp21,tmp17,$0x0 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > shl_i32 tmp18,tmp18,$0x3 > ext_i32_i64 tmp17,tmp18 > add_i64 tmp17,tmp17,$0x55c2cb3453b0 > ld_i64 tmp21,tmp17,$0x0 > brcond_i64 tmp21,$0x15,ne,$L2 > ld_i32 tmp18,env,$0xffffffffffffdaf8 > call plugin(0x7f11633a6420),$0x1,$0,tmp18,$0xfffffff0 > set_label $L2 > mov_i32 loc0,$0xe05b > mov_i32 loc1,$0xf000 > ext16u_i32 loc13,loc1 > st_i32 loc13,env,$0x54 > shl_i32 cs_base,loc13,$0x4 > mov_i32 eip,loc0 > call lookup_tb_ptr,$0x6,$1,tmp15,env > goto_ptr tmp15 > set_label $L0 > exit_tb $0x7f110c000043 > > OP after optimization and liveness analysis: > ld_i32 tmp9,env,$0xfffffffffffffff8 pref=0xffff > brcond_i32 tmp9,$0x0,lt,$L0 dead: 0 1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 pref=0xffff > mul_i32 tmp18,tmp18,$0x18 dead: 1 pref=0xffff > ext_i32_i64 tmp17,tmp18 dead: 1 pref=0xffff > add_i64 tmp17,tmp17,$0x55c2cb346e38 dead: 1 pref=0xffff > ld_i64 tmp21,tmp17,$0x0 pref=0xffff > add_i64 tmp21,tmp21,$0x1 dead: 1 pref=0xffff > st_i64 tmp21,tmp17,$0x0 dead: 0 1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 pref=0xffff > mul_i32 tmp18,tmp18,$0x18 dead: 1 2 pref=0xffff > ext_i32_i64 tmp17,tmp18 dead: 1 pref=0xffff > add_i64 tmp17,tmp17,$0x55c2cb346e38 dead: 1 2 pref=0xffff > ld_i64 tmp21,tmp17,$0x0 dead: 1 pref=0xffff > brcond_i64 tmp21,$0x1,ltu,$L1 dead: 0 1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 dead: 1 pref=0x80 > call plugin(0x7f11633ab550),$0x1,$0,tmp18,$0x0 dead: 0 1 > set_label $L1 > st8_i32 $0x1,env,$0xfffffffffffffffc dead: 0 > > ---- 0000000000000ff0 0000000000000000 > ld_i32 tmp18,env,$0xffffffffffffdaf8 pref=0xffff > shl_i32 tmp18,tmp18,$0x3 dead: 1 pref=0xffff > ext_i32_i64 tmp17,tmp18 dead: 1 pref=0xffff > add_i64 tmp17,tmp17,$0x55c2cb3453b0 dead: 1 pref=0xffff > ld_i64 tmp21,tmp17,$0x0 pref=0xffff > add_i64 tmp21,tmp21,$0x1 dead: 1 2 pref=0xffff > st_i64 tmp21,tmp17,$0x0 dead: 0 1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 pref=0xffff > shl_i32 tmp18,tmp18,$0x3 dead: 1 2 pref=0xffff > ext_i32_i64 tmp17,tmp18 dead: 1 pref=0xffff > add_i64 tmp17,tmp17,$0x55c2cb3453b0 dead: 1 2 pref=0xffff > ld_i64 tmp21,tmp17,$0x0 dead: 1 pref=0xffff > brcond_i64 tmp21,$0x15,ne,$L2 dead: 0 1 > ld_i32 tmp18,env,$0xffffffffffffdaf8 dead: 1 pref=0x80 > call plugin(0x7f11633a6420),$0x1,$0,tmp18,$0xfffffff0 dead: 0 1 > set_label $L2 > st_i32 $0xf000,env,$0x54 dead: 0 > mov_i32 cs_base,$0xf0000 sync: 0 dead: 0 1 pref=0xffff > mov_i32 eip,$0xe05b sync: 0 dead: 0 1 pref=0xffff > call lookup_tb_ptr,$0x6,$1,tmp15,env dead: 1 pref=none > goto_ptr tmp15 dead: 0 > set_label $L0 > exit_tb $0x7f110c000043 > > OUT: [size=224] > -- guest addr 0x0000000000000ff0 + tb prologue > 0x7f110c000100: 8b 5d f8 movl -8(%rbp), %ebx > 0x7f110c000103: 85 db testl %ebx, %ebx > 0x7f110c000105: 0f 8c bd 00 00 00 jl 0x7f110c0001c8 > 0x7f110c00010b: 8b 9d f8 da ff ff movl -0x2508(%rbp), %ebx > 0x7f110c000111: 6b db 18 imull $0x18, %ebx, %ebx > 0x7f110c000114: 48 63 db movslq %ebx, %rbx > 0x7f110c000117: 49 bc 38 6e 34 cb c2 55 movabsq $0x55c2cb346e38, %r12 > 0x7f110c00011f: 00 00 > 0x7f110c000121: 49 03 dc addq %r12, %rbx > 0x7f110c000124: 4c 8b 2b movq (%rbx), %r13 > 0x7f110c000127: 49 ff c5 incq %r13 > 0x7f110c00012a: 4c 89 2b movq %r13, (%rbx) > 0x7f110c00012d: 8b 9d f8 da ff ff movl -0x2508(%rbp), %ebx > 0x7f110c000133: 6b db 18 imull $0x18, %ebx, %ebx > 0x7f110c000136: 48 63 db movslq %ebx, %rbx > 0x7f110c000139: 49 03 dc addq %r12, %rbx > 0x7f110c00013c: 48 8b 1b movq (%rbx), %rbx > 0x7f110c00013f: 48 83 fb 01 cmpq $1, %rbx > 0x7f110c000143: 0f 82 0d 00 00 00 jb 0x7f110c000156 > 0x7f110c000149: 8b bd f8 da ff ff movl -0x2508(%rbp), %edi > 0x7f110c00014f: 33 f6 xorl %esi, %esi > 0x7f110c000151: e8 fa b3 3a 57 callq 0x7f11633ab550 > 0x7f110c000156: c6 45 fc 01 movb $1, -4(%rbp) > 0x7f110c00015a: 8b 9d f8 da ff ff movl -0x2508(%rbp), %ebx > 0x7f110c000160: c1 e3 03 shll $3, %ebx > 0x7f110c000163: 48 63 db movslq %ebx, %rbx > 0x7f110c000166: 49 bc b0 53 34 cb c2 55 movabsq $0x55c2cb3453b0, %r12 > 0x7f110c00016e: 00 00 > 0x7f110c000170: 49 03 dc addq %r12, %rbx > 0x7f110c000173: 4c 8b 2b movq (%rbx), %r13 > 0x7f110c000176: 49 ff c5 incq %r13 > 0x7f110c000179: 4c 89 2b movq %r13, (%rbx) > 0x7f110c00017c: 8b 9d f8 da ff ff movl -0x2508(%rbp), %ebx > 0x7f110c000182: c1 e3 03 shll $3, %ebx > 0x7f110c000185: 48 63 db movslq %ebx, %rbx > 0x7f110c000188: 49 03 dc addq %r12, %rbx > 0x7f110c00018b: 48 8b 1b movq (%rbx), %rbx > 0x7f110c00018e: 48 83 fb 15 cmpq $0x15, %rbx > 0x7f110c000192: 0f 85 10 00 00 00 jne 0x7f110c0001a8 > 0x7f110c000198: 8b bd f8 da ff ff movl -0x2508(%rbp), %edi > 0x7f110c00019e: be f0 ff ff ff movl $0xfffffff0, %esi > 0x7f110c0001a3: e8 78 62 3a 57 callq 0x7f11633a6420 > 0x7f110c0001a8: c7 45 54 00 f0 00 00 movl $0xf000, 0x54(%rbp) > 0x7f110c0001af: c7 45 58 00 00 0f 00 movl $0xf0000, 0x58(%rbp) > 0x7f110c0001b6: c7 45 20 5b e0 00 00 movl $0xe05b, 0x20(%rbp) > 0x7f110c0001bd: 48 8b fd movq %rbp, %rdi > 0x7f110c0001c0: ff 15 12 00 00 00 callq *0x12(%rip) > 0x7f110c0001c6: ff e0 jmpq *%rax > 0x7f110c0001c8: 48 8d 05 74 fe ff ff leaq -0x18c(%rip), %rax > 0x7f110c0001cf: e9 44 fe ff ff jmp 0x7f110c000018 > -- tb slow paths + alignment > 0x7f110c0001d4: 90 nop > 0x7f110c0001d5: 90 nop > 0x7f110c0001d6: 90 nop > 0x7f110c0001d7: 90 nop > data: [size=8] > 0x7f110c0001d8: .quad 0x000055c2ba75abc0 > > before continuing to execute. > > > > > > >> > >> On Mon, Sep 2, 2024, 16:08 Alex Bennée <alex.ben...@linaro.org> wrote: > >> > >> Elisha Hollander <just4now666...@gmail.com> writes: > >> > >> > But for qemu_plugin_update_ns > >> > > >> > On Mon, Sep 2, 2024, 15:38 Elisha Hollander < > just4now666...@gmail.com> wrote: > >> > > >> > Just checked with 9.0.2 it it still gives the error... > >> > > >> > On Wed, Aug 28, 2024, 14:05 Alex Bennée <alex.ben...@linaro.org> > wrote: > >> > > >> > Elisha Hollander <just4now666...@gmail.com> writes: > >> > > >> > > Although it gives `undefined symbol: > qemu_plugin_scoreboard_free`. But > >> > > probably I messed something up... > >> > > >> > Are you using an older QEMU? We should trigger an API warning if > they > >> > are mismatched but maybe thats not working. > >> > > >> > > > >> > > On Tue, Aug 27, 2024, 14:59 Elisha Hollander < > just4now666...@gmail.com> wrote: > >> > > > >> > > Oh nice, I didn't know that > >> > > > >> > > On Tue, Aug 27, 2024, 12:39 Alex Bennée <alex.ben...@linaro.org> > wrote: > >> > > > >> > > Elisha Hollander <just4now666...@gmail.com> writes: > >> > > > >> > > > Signed-off-by: Elisha Hollander <just4now666...@gmail.com> > >> > > > >> > > What is the use-case for this patch? > >> > > > >> > > If you are simply looking to slow the emulated system down > please have a > >> > > look at: > >> > > > >> > > > https://qemu.readthedocs.io/en/master/about/emulation.html#limit-instructions-per-second > >> > > > >> > > which uses the plugin system to limit the run rate and sleep if > its > >> > > running too fast. The longer term goal is to deprecate the > icount clock > >> > > alignment feature from the core code and leave icount to just > provide > >> > > the deterministic execution needed for record/replay and reverse > >> > > debugging. > >> > > > >> > > > --- > >> > > > accel/tcg/cpu-exec.c | 4 +--- > >> > > > accel/tcg/icount-common.c | 4 ++-- > >> > > > 2 files changed, 3 insertions(+), 5 deletions(-) > >> > > > > >> > > > diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c > >> > > > index 8163295f34..4c2baf8ed4 100644 > >> > > > --- a/accel/tcg/cpu-exec.c > >> > > > +++ b/accel/tcg/cpu-exec.c > >> > > > @@ -95,11 +95,10 @@ static void align_clocks(SyncClocks *sc, > CPUState *cpu) > >> > > > static void print_delay(const SyncClocks *sc) > >> > > > { > >> > > > static float threshold_delay; > >> > > > - static int64_t last_realtime_clock; > >> > > > static int nb_prints; > >> > > > > >> > > > if (icount_align_option && > >> > > > - sc->realtime_clock - last_realtime_clock >= > MAX_DELAY_PRINT_RATE && > >> > > > + sc->diff_clk >= MAX_DELAY_PRINT_RATE && > >> > > > nb_prints < MAX_NB_PRINTS) { > >> > > > if ((-sc->diff_clk / (float)1000000000LL > > threshold_delay) || > >> > > > (-sc->diff_clk / (float)1000000000LL < > >> > > > @@ -109,7 +108,6 @@ static void print_delay(const SyncClocks > *sc) > >> > > > threshold_delay - 1, > >> > > > threshold_delay); > >> > > > nb_prints++; > >> > > > - last_realtime_clock = sc->realtime_clock; > >> > > > } > >> > > > } > >> > > > } > >> > > > diff --git a/accel/tcg/icount-common.c > b/accel/tcg/icount-common.c > >> > > > index 8d3d3a7e9d..f07f8baf4d 100644 > >> > > > --- a/accel/tcg/icount-common.c > >> > > > +++ b/accel/tcg/icount-common.c > >> > > > @@ -46,8 +46,8 @@ > >> > > > * is TCG-specific, and does not need to be built for other > accels. > >> > > > */ > >> > > > static bool icount_sleep = true; > >> > > > -/* Arbitrarily pick 1MIPS as the minimum allowable speed. */ > >> > > > -#define MAX_ICOUNT_SHIFT 10 > >> > > > +/* Arbitrarily pick the minimum allowable speed. */ > >> > > > +#define MAX_ICOUNT_SHIFT 30 > >> > > > > >> > > > /* Do not count executed instructions */ > >> > > > ICountMode use_icount = ICOUNT_DISABLED; > >> > > > >> > > -- > >> > > Alex Bennée > >> > > Virtualisation Tech Lead @ Linaro > >> > > >> > -- > >> > Alex Bennée > >> > Virtualisation Tech Lead @ Linaro > >> > >> Can you give me your command line please? > >> > >> -- > >> Alex Bennée > >> Virtualisation Tech Lead @ Linaro > > -- > Alex Bennée > Virtualisation Tech Lead @ Linaro >
