Qiang Liu wrote: > I can make the dtrace related modules (drivers) loaded before boot device > driver, but dtrace probing only happens after dtrace related pseudo devices > got created. > > "The most common use of anonymous tracing is to permit device driver > developers to debug and trace activity that occurs during system boot" > > --- Here ***during system boot*** actually means ever since the time *after* > dtrace probes are enabled during system boot. > > "To allow tracing during boot, the dtrace(7D) driver must be loaded as early > as possible. dtrace adds the necessary forceload statements to /etc/system > for each required DTrace provider and for dtrace(7D) itself" > > --- Here ***as early as possible*** does not mean too much at least to those > who want to trace the behavior of boot device driver. > > any comments will be appreciated.
Yes. I believe you are correct. kmdb exists. > > ---------------------- > > elfdump of my boot device driver. > > [0] NEEDED 0x1 misc/md5 > [1] NEEDED 0xa misc/sha1 > [2] NEEDED 0x14 misc/bignum > [3] NEEDED 0x20 drv/systrace > [4] NEEDED 0x2d drv/sdt > [5] NEEDED 0x35 drv/profile > [6] NEEDED 0x41 drv/lx_systrace > [7] NEEDED 0x51 drv/lockstat > [8] NEEDED 0x5e drv/fbt > [9] NEEDED 0x66 drv/fasttrap > [10] NEEDED 0x73 drv/dtrace > ... > load 'misc/kcf' id 51 loaded @ 0xfffffffff79e9000/0xfffffffffbdc7e08 size > 155736/3160 > load 'misc/md5' id 50 loaded @ 0xfffffffff79e6000/0xfffffffffbdc7b30 size > 10528/728 > load 'misc/sha1' id 52 loaded @ 0xfffffffff7a10000/0xfffffffffbdd18e0 size > 12880/728 > load 'misc/bignum' id 53 loaded @ 0xfffffffff7a14000/0xfffffffffbdd1bb8 size > 29712/280 > load 'drv/dtrace' id 7 loaded @ 0xfffffffff7a1c000/0xfffffffffbdd1e80 size > 116728/992 > load 'drv/systrace' id 54 loaded @ 0xfffffffff7a1b410/0xfffffffffbdd1cd0 size > 2768/432 > load 'drv/sdt' id 55 loaded @ 0xfffffffff7a39000/0xfffffffffbdd2280 size > 9416/21096 > load 'drv/profile' id 56 loaded @ 0xfffffffff7a3c000/0xfffffffffbdd74e8 size > 4376/600 > load 'exec/elfexec' id 59 loaded @ 0xfffffffff7a46000/0xfffffffffbddaa48 size > 42944/328 > load 'brand/lx_brand' id 58 loaded @ 0xfffffffff7a3e000/0xfffffffffbdd78f8 > size 31016/12624 > load 'drv/lx_systrace' id 57 loaded @ 0xfffffffff7956670/0xfffffffffbdd7740 > size 2304/440 > load 'drv/lockstat' id 60 loaded @ 0xfffffffff7a387f8/0xfffffffffbddabb0 size > 1928/992 > load 'drv/fbt' id 61 loaded @ 0xfffffffff7a51000/0xfffffffffbddaf90 size > 4264/456 > load 'drv/fasttrap' id 62 loaded @ 0xfffffffff7a53000/0xfffffffffbddb158 size > 23736/664 > load 'drv/emlxs' id 49 loaded @ 0xfffffffff7957000/0xfffffffffbdb5f90 size > 584832/72608 <----------- my boot device driver > .... > installing emlxs, module id 49. > installing dtrace, module id 7. > installing md5, module id 50. > installing kcf, module id 51. > installing sha1, module id 52. > installing bignum, module id 53. > installing systrace, module id 54. > installing sdt, module id 55. > installing profile, module id 56. > installing lx_systrace, module id 57. > installing lx_brand, module id 58. > installing elfexec, module id 59. > installing lockstat, module id 60. > installing fbt, module id 61. > installing fasttrap, module id 62. > load 'misc/fctl' id 63 loaded @ 0xfffffffff7a59000/0xfffffffffbdde1e4 size > 41240/3384 > installing fctl, module id 63. > .... > Jan 22 10:37:18 sfx4600 genunix: [ID 308332 kern.notice] root on > /scsi_vhci/d...@g20000011c6818e6c:a fstype ufs > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/ctfs' id 69 > loaded @ 0xfffffffff7aeb000/0xfffffffffbde2101 size 16040/888 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing ctfs, > module id 69. > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/procfs' id > 70 loaded @ 0xfffffffff7aef000/0xfffffffffbde24d9 size 132488/268 > 8 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing procfs, > module id 70. > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/mntfs' id > 71 loaded @ 0xfffffffff7b10000/0xfffffffffbde2f6d size 12024/176 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing mntfs, > module id 71. > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/tmpfs' id > 72 loaded @ 0xfffffffff7b13000/0xffffffffc0000000 size 29408/66432 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing tmpfs, > module id 72. > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/objfs' id > 73 loaded @ 0xfffffffff7b1b000/0xffffffffc00103a8 size 9488/1000 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing objfs, > module id 73. > Jan 22 10:37:18 sfx4600 genunix: [ID 943528 kern.notice] load 'fs/sharefs' id > 74 loaded @ 0xfffffffff7b1e000/0xffffffffc00107b0 size 9344/1344 > Jan 22 10:37:18 sfx4600 genunix: [ID 131579 kern.notice] installing sharefs, > module id 74. > Jan 22 10:37:18 sfx4600 unix: [ID 190185 kern.notice] SMBIOS v2.3 loaded > (3938 bytes) > Jan 22 10:37:18 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: > systrace0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] systrace0 is > /pseudo/systr...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: sdt0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] sdt0 is > /pseudo/s...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: > profile0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] profile0 is > /pseudo/prof...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: > lx_systrace0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] lx_systrace0 is > /pseudo/lx_systr...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: > lockstat0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] lockstat0 is > /pseudo/locks...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: fbt0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] fbt0 is > /pseudo/f...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: > fasttrap0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] fasttrap0 is > /pseudo/fastt...@0 > Jan 22 10:37:19 sfx4600 pseudo: [ID 129642 kern.notice] pseudo-device: dtrace0 > Jan 22 10:37:19 sfx4600 genunix: [ID 936769 kern.notice] dtrace0 is > /pseudo/dtr...@0 > Jan 22 10:37:19 sfx4600 dtrace: [ID 566105 kern.notice] NOTICE: enabling > probe 0 (fbt::emlxs_attach:entry) > Jan 22 10:37:19 sfx4600 dtrace: [ID 566105 kern.notice] NOTICE: enabling > probe 1 (fbt:pcplusmp::) > Jan 22 10:37:19 sfx4600 dtrace: [ID 566105 kern.notice] NOTICE: enabling > probe 2 (fbt::emlxs_attach:return) > Jan 22 10:37:19 sfx4600 dtrace: [ID 566105 kern.notice] NOTICE: enabling > probe 3 (dtrace:::ERROR) > ..... 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