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22 .TH WSDIFF 1ONBLD "Jul 15, 2010"
24 \- report differences between proto area objects
26 \fBwsdiff [-dvVst] [-r \fIresults\fP] [-i \fIfilelist\fP] \fIold\fP \fInew\fP
29 The wsdiff utility detects and reports on object differences found between
30 two proto areas constructed from the same workspace. This can be useful
31 when trying to understand which objects have changed as a result of a particular
34 \fIold\fP specifies the baseline proto area constructed without the source
35 change. \fInew\fP specifies the proto area constructed with the source
36 change. Both \fIold\fP and \fInew\fP should be constructed from the same
37 workspace, otherwise wsdiff will find object differences not associated
38 with the source change.
42 Print debug information. The debug lines are prefixed with ##.
45 Do not truncate the diffs logged to the results file. By default wsdiff
46 will truncate the length of a sufficiently long set of object diffs to preserve
47 the readability of the results file. -v can be used to override this behaviour.
50 Log observed differences for all ELF sections, rather than logging only the first
51 difference found. When wsdiff encounters an ELF section difference, by default
52 it will log the difference associated with that section only, and move on. -V forces
53 wsdiff to log all ELF section differences found between two objects, rather than
54 just the first. Because of the extra work involved, this may slow wsdiff down
58 Produce sorted lists. This is handy when comparing multiple wsdiff outputs
59 because wsdiff runs in multithreaded mode so the list of differences is not
60 sorted and can differ between multiple runs.
63 Look for the onbld tools in $SRC/tools rather than /opt/onbld/bin
66 Log results to the specified log file. The log file contains a list of new, deleted,
67 and changed objects, as well as diffs signifying what wsdiff found to be different.
70 Specify which objects should be compared by wsdiff via an input file list (See
74 The list of objects appearing to differ between \fIold\fP and \fInew\fP is
75 printed to stdout. If -r was specified, the list of differing objects and
76 their differrences are logged to \fIresults\fP.
79 \fBExample 1: Using wsdiff to determine patch deliverables\fR
81 The following example shows how to use wsdiff to determine the set of objects
82 requiring (re)delivery via patch as a result of a given source change:
84 Starting with a built workspace, move the existing proto area aside:
88 Codemgr_wsdata/ proto/ usr/
90 user@example$ mv proto proto.old
93 Next, integrate the source changes, rebuild, and invoke wsdiff specifying the
94 old and new proto areas:
98 Codemgr_wsdata/ proto/ proto.old/ usr/
100 user@example$ wsdiff proto.old proto
101 platform/SUNW,SPARC-Enterprise/kernel/sparcv9/unix
102 platform/SUNW,Sun-Fire-15000/kernel/sparcv9/unix
103 platform/sun4v/kernel/sparcv9/unix
104 platform/sun4u/kernel/sparcv9/unix
105 platform/SUNW,Ultra-Enterprise-10000/kernel/sparcv9/unix
106 platform/SUNW,Sun-Fire/kernel/sparcv9/unix
109 \fBExample 2: The wsdiff results file\fR
111 With the -r option, wsdiff will log the list of objects that appear different, as well
112 as a set of diffs highlighting the observed difference:
115 user@example$ wsdiff -r results proto.old proto
116 platform/SUNW,SPARC-Enterprise/kernel/sparcv9/unix
117 platform/SUNW,Sun-Fire-15000/kernel/sparcv9/unix
118 platform/sun4v/kernel/sparcv9/unix
119 platform/sun4u/kernel/sparcv9/unix
120 platform/SUNW,Ultra-Enterprise-10000/kernel/sparcv9/unix
121 platform/SUNW,Sun-Fire/kernel/sparcv9/unix
123 user@example$ cat results
124 # This file was produced by wsdiff
125 # 2006/7/10 at 18:28:56
126 Base proto area: proto.old/
127 Patch (new) proto area: proto/
128 Results file: results
130 platform/SUNW,SPARC-Enterprise/kernel/sparcv9/unix
131 NOTE: ELF .text difference detected.
133 89562,89567c89562,89567
134 < lgrp_cpu_init+0x158: 9e 10 20 01 mov 0x1, %o7
135 < lgrp_cpu_init+0x15c: b3 2b d0 1c sllx %o7, %i4, %i1
136 < lgrp_cpu_init+0x160: 9a 12 40 19 or %o1, %i1, %o5
137 < lgrp_cpu_init+0x164: da 76 a0 30 stx %o5, [%i2 + 0x30]
138 < lgrp_cpu_init+0x168: d8 04 e0 00 ld [%l3], %o4
139 < lgrp_cpu_init+0x16c: 80 a3 20 00 cmp %o4, 0x0
141 > lgrp_cpu_init+0x158: 9a 10 20 01 mov 0x1, %o5
142 > lgrp_cpu_init+0x15c: b3 2b 50 1c sllx %o5, %i4, %i1
143 > lgrp_cpu_init+0x160: 98 12 00 19 or %o0, %i1, %o4
144 > lgrp_cpu_init+0x164: d8 76 a0 30 stx %o4, [%i2 + 0x30]
145 > lgrp_cpu_init+0x168: d6 04 e0 00 ld [%l3], %o3
146 > lgrp_cpu_init+0x16c: 80 a2 e0 00 cmp %o3, 0x0
151 \fBExample 3: Using an input file list\fR
153 The -i option tells wsdiff to compare a specific list of objects. This can be useful
154 in conjunction with other options that direct wsdiff to log more verbosely, allowing
155 one to "drill down" into a particular object's differences:
158 user@example$ echo "usr/lib/mdb/kvm/sparcv9/genunix.so" > flist
159 user@example$ wsdiff -vV -r results -i flist proto.old proto
160 usr/lib/mdb/kvm/sparcv9/genunix.so
162 user@example$ cat results
163 <... verbose differences only for genunix.so ...>
166 \fBExample 4: Invoking wsdiff through nightly(1ONBLD)\fR
168 By specifying -w in NIGHTLY_OPTIONS, nightly(1ONBLD) will use wsdiff(1ONBLD) to determine
169 which objects look different, compared to the previous build. A pre-existing proto area
170 must exist for wsdiff(1ONBLD) to compare against. nightly(1ONBLD) will move aside the
171 pre-existing proto area (renaming it to $ROOT.prev under proto), and will
172 invoke wsdiff at the end of the build. The list of changed objects will be reported
173 in the nightly mail message, and a results file "wsdiff_results" will appear in the
176 \fBExample 5: Influencing the level of paralelism\fR
178 wsdiff spawns a number of threads by default after it determines the list
179 of files for comparison. Default number of threads is based on the number of
180 on-line CPUs present in the system. To set the number of threads for processing
181 to some other value the DMAKE_MAX_JOBS environment variable can be used:
184 $ DMAKE_MAX_JOBS=24 wsdiff proto_base proto_patch
187 Note that this variable is also used for nightly(1ONBLD) so when run from
188 nightly(1ONBLD), wsdiff will honor the setting.