| 1 | #!/bin/sh |
| 2 | |
| 3 | test_description='test trace2 cmd_ancestry event' |
| 4 | |
| 5 | . ./test-lib.sh |
| 6 | |
| 7 | # Turn off any inherited trace2 settings for this test. |
| 8 | sane_unset GIT_TRACE2 GIT_TRACE2_PERF GIT_TRACE2_EVENT |
| 9 | sane_unset GIT_TRACE2_BRIEF |
| 10 | sane_unset GIT_TRACE2_CONFIG_PARAMS |
| 11 | |
| 12 | # Add t/helper directory to PATH so that we can use a relative |
| 13 | # path to run nested instances of test-tool.exe (see 004child). |
| 14 | # This helps with HEREDOC comparisons later. |
| 15 | TTDIR="$GIT_BUILD_DIR/t/helper/" && export TTDIR |
| 16 | PATH="$TTDIR:$PATH" && export PATH |
| 17 | |
| 18 | # The 400ancestry helper spawns a child process so that the child |
| 19 | # sees "test-tool" in its process ancestry. We capture only the |
| 20 | # child's trace2 output to a file. |
| 21 | # |
| 22 | # The tests use git commands that spawn child git processes (e.g., |
| 23 | # alias resolution) to create a controlled multi-level process tree. |
| 24 | # Because cmd_ancestry walks the real process tree, processes will |
| 25 | # also report ancestors above "test-tool" that depend on the test |
| 26 | # runner environment (e.g., bash, make, tmux). The filter functions |
| 27 | # below truncate the ancestry at "test-tool", discarding anything |
| 28 | # above it, so only the controlled portion is verified. |
| 29 | # |
| 30 | # On platforms without a real procinfo implementation (the stub), |
| 31 | # no cmd_ancestry event is emitted. We detect this at runtime and |
| 32 | # skip the format-specific tests accordingly. |
| 33 | |
| 34 | # Enable these tests only when cmd_ancestry reports real process names. |
| 35 | # The procinfo stub emits no event; under user-mode emulation (e.g. |
| 36 | # qemu-user) /proc reports the emulator, not the guest. Spawn test-tool |
| 37 | # from test-tool and require "test-tool" in the child's ancestry. |
| 38 | test_expect_success 'detect cmd_ancestry support' ' |
| 39 | test_when_finished "rm -f trace.detect" && |
| 40 | GIT_TRACE2_BRIEF=1 GIT_TRACE2="$(pwd)/trace.detect" \ |
| 41 | test-tool trace2 004child test-tool trace2 001return 0 && |
| 42 | if grep -q "^cmd_ancestry.*test-tool" trace.detect |
| 43 | then |
| 44 | test_set_prereq TRACE2_ANCESTRY |
| 45 | fi |
| 46 | ' |
| 47 | |
| 48 | # Filter functions for each trace2 target format. |
| 49 | # |
| 50 | # Each extracts cmd_ancestry events, strips format-specific syntax, |
| 51 | # and truncates the ancestor list at the outermost "test-tool" |
| 52 | # (or "test-tool.exe" on Windows), discarding any higher-level |
| 53 | # (uncontrolled) ancestors. |
| 54 | # |
| 55 | # Output is a space-separated list of ancestor names, one line per |
| 56 | # cmd_ancestry event, with the immediate parent listed first: |
| 57 | # |
| 58 | # test-tool (or: test-tool.exe) |
| 59 | # git test-tool (or: git.exe test-tool.exe) |
| 60 | # git test-tool test-tool (or: git.exe test-tool.exe test-tool.exe) |
| 61 | |
| 62 | if test_have_prereq MINGW |
| 63 | then |
| 64 | TT=test-tool$X |
| 65 | else |
| 66 | TT=test-tool |
| 67 | fi |
| 68 | |
| 69 | filter_ancestry_normal () { |
| 70 | sed -n '/^cmd_ancestry/{ |
| 71 | s/^cmd_ancestry // |
| 72 | s/ <- / /g |
| 73 | s/\(.*'"$TT"'\) .*/\1/ |
| 74 | p |
| 75 | }' |
| 76 | } |
| 77 | |
| 78 | filter_ancestry_perf () { |
| 79 | sed -n '/cmd_ancestry/{ |
| 80 | s/.*ancestry:\[// |
| 81 | s/\]// |
| 82 | s/\(.*'"$TT"'\) .*/\1/ |
| 83 | p |
| 84 | }' |
| 85 | } |
| 86 | |
| 87 | filter_ancestry_event () { |
| 88 | sed -n '/"cmd_ancestry"/{ |
| 89 | s/.*"ancestry":\[// |
| 90 | s/\].*// |
| 91 | s/"//g |
| 92 | s/,/ /g |
| 93 | s/\(.*'"$TT"'\) .*/\1/ |
| 94 | p |
| 95 | }' |
| 96 | } |
| 97 | |
| 98 | # On Windows (MINGW) when running with the bin-wrappers, we also see "sh.exe" in |
| 99 | # the ancestry. We must therefore account for this expected ancestry element in |
| 100 | # the expected output of the tests. |
| 101 | if test_have_prereq MINGW && test -z "$no_bin_wrappers"; then |
| 102 | SH_TT="sh$X $TT" |
| 103 | else |
| 104 | SH_TT="$TT" |
| 105 | fi |
| 106 | |
| 107 | # Git alias resolution spawns the target command as a child process. |
| 108 | # Using "git -c alias.xyz=version xyz" creates a two-level chain: |
| 109 | # |
| 110 | # test-tool (400ancestry) |
| 111 | # -> git (resolves alias xyz -> version) |
| 112 | # -> git (version) |
| 113 | # |
| 114 | # Both git processes are instrumented and emit cmd_ancestry. After |
| 115 | # filtering out ancestors above test-tool, we get: |
| 116 | # |
| 117 | # test-tool (from git alias resolver) |
| 118 | # git test-tool (from git version) |
| 119 | |
| 120 | test_expect_success TRACE2_ANCESTRY 'normal: git alias chain, 2 levels' ' |
| 121 | test_when_finished "rm -f trace.normal actual expect" && |
| 122 | test-tool trace2 400ancestry normal "$(pwd)/trace.normal" \ |
| 123 | git -c alias.xyz=version xyz && |
| 124 | filter_ancestry_normal <trace.normal >actual && |
| 125 | cat >expect <<-EOF && |
| 126 | $SH_TT |
| 127 | git$X $SH_TT |
| 128 | EOF |
| 129 | test_cmp expect actual |
| 130 | ' |
| 131 | |
| 132 | test_expect_success TRACE2_ANCESTRY 'perf: git alias chain, 2 levels' ' |
| 133 | test_when_finished "rm -f trace.perf actual expect" && |
| 134 | test-tool trace2 400ancestry perf "$(pwd)/trace.perf" \ |
| 135 | git -c alias.xyz=version xyz && |
| 136 | filter_ancestry_perf <trace.perf >actual && |
| 137 | cat >expect <<-EOF && |
| 138 | $SH_TT |
| 139 | git$X $SH_TT |
| 140 | EOF |
| 141 | test_cmp expect actual |
| 142 | ' |
| 143 | |
| 144 | test_expect_success TRACE2_ANCESTRY 'event: git alias chain, 2 levels' ' |
| 145 | test_when_finished "rm -f trace.event actual expect" && |
| 146 | test-tool trace2 400ancestry event "$(pwd)/trace.event" \ |
| 147 | git -c alias.xyz=version xyz && |
| 148 | filter_ancestry_event <trace.event >actual && |
| 149 | cat >expect <<-EOF && |
| 150 | $SH_TT |
| 151 | git$X $SH_TT |
| 152 | EOF |
| 153 | test_cmp expect actual |
| 154 | ' |
| 155 | |
| 156 | # Use 004child to add a test-tool layer, creating a three-level chain: |
| 157 | # |
| 158 | # test-tool (400ancestry) |
| 159 | # -> test-tool (004child) |
| 160 | # -> git (resolves alias xyz -> version) |
| 161 | # -> git (version) |
| 162 | # |
| 163 | # Three instrumented processes emit cmd_ancestry. After filtering: |
| 164 | # |
| 165 | # test-tool (from test-tool 004child) |
| 166 | # test-tool test-tool (from git alias resolver) |
| 167 | # git test-tool test-tool (from git version) |
| 168 | |
| 169 | test_expect_success TRACE2_ANCESTRY 'normal: deeper chain, 3 levels' ' |
| 170 | test_when_finished "rm -f trace.normal actual expect" && |
| 171 | test-tool trace2 400ancestry normal "$(pwd)/trace.normal" \ |
| 172 | test-tool trace2 004child \ |
| 173 | git -c alias.xyz=version xyz && |
| 174 | filter_ancestry_normal <trace.normal >actual && |
| 175 | cat >expect <<-EOF && |
| 176 | $TT |
| 177 | $SH_TT $TT |
| 178 | git$X $SH_TT $TT |
| 179 | EOF |
| 180 | test_cmp expect actual |
| 181 | ' |
| 182 | |
| 183 | test_done |