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https://github.com/git/git
synced 2024-09-13 05:14:36 +00:00
bce9db6de9
Teach git to read the system and global config files for default Trace2 settings. This allows system-wide Trace2 settings to be installed and inherited to make it easier to manage a collection of systems. The original GIT_TR2* environment variables are loaded afterwards and can be used to override the system settings. Only the system and global config files are used. Repo and worktree local config files are ignored. Likewise, the "-c" command line arguments are also ignored. These limits are for performance reasons. (1) For users not using Trace2, there should be minimal overhead to detect that Trace2 is not enabled. In particular, Trace2 should not allocate lots of otherwise unused data strucutres. (2) For accurate performance measurements, Trace2 should be initialized as early in the git process as possible, and before most of the normal git process initialization (which involves discovering the .git directory and reading a hierarchy of config files). Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
175 lines
5.8 KiB
Bash
Executable file
175 lines
5.8 KiB
Bash
Executable file
#!/bin/sh
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test_description='test trace2 facility (perf target)'
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. ./test-lib.sh
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# Turn off any inherited trace2 settings for this test.
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sane_unset GIT_TR2 GIT_TR2_PERF GIT_TR2_EVENT
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sane_unset GIT_TR2_PERF_BRIEF
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sane_unset GIT_TR2_CONFIG_PARAMS
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# Add t/helper directory to PATH so that we can use a relative
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# path to run nested instances of test-tool.exe (see 004child).
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# This helps with HEREDOC comparisons later.
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TTDIR="$GIT_BUILD_DIR/t/helper/" && export TTDIR
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PATH="$TTDIR:$PATH" && export PATH
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# Warning: use of 'test_cmp' may run test-tool.exe and/or git.exe
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# Warning: to do the actual diff/comparison, so the HEREDOCs here
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# Warning: only cover our actual calls to test-tool and/or git.
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# Warning: So you may see extra lines in artifact files when
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# Warning: interactively debugging.
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V=$(git version | sed -e 's/^git version //') && export V
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# There are multiple trace2 targets: normal, perf, and event.
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# Trace2 events will/can be written to each active target (subject
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# to whatever filtering that target decides to do).
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# Test each target independently.
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#
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# Defer setting GIT_TR2_PERF until the actual command we want to
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# test because hidden git and test-tool commands in the test
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# harness can contaminate our output.
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# Enable "brief" feature which turns off the prefix:
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# "<clock> <file>:<line> | <nr_parents> | "
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GIT_TR2_PERF_BRIEF=1 && export GIT_TR2_PERF_BRIEF
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# Repeat some of the t0210 tests using the perf target stream instead of
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# the normal stream.
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#
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# Tokens here of the form _FIELD_ have been replaced in the observed output.
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# Verb 001return
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#
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# Implicit return from cmd_<verb> function propagates <code>.
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test_expect_success 'perf stream, return code 0' '
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test_when_finished "rm trace.perf actual expect" &&
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GIT_TR2_PERF="$(pwd)/trace.perf" test-tool trace2 001return 0 &&
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perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
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cat >expect <<-EOF &&
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d0|main|version|||||$V
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d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
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d0|main|cmd_name|||||trace2 (trace2)
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d0|main|exit||_T_ABS_|||code:0
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d0|main|atexit||_T_ABS_|||code:0
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EOF
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test_cmp expect actual
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'
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test_expect_success 'perf stream, return code 1' '
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test_when_finished "rm trace.perf actual expect" &&
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test_must_fail env GIT_TR2_PERF="$(pwd)/trace.perf" test-tool trace2 001return 1 &&
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perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
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cat >expect <<-EOF &&
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d0|main|version|||||$V
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d0|main|start||_T_ABS_|||_EXE_ trace2 001return 1
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d0|main|cmd_name|||||trace2 (trace2)
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d0|main|exit||_T_ABS_|||code:1
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d0|main|atexit||_T_ABS_|||code:1
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EOF
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test_cmp expect actual
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'
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# Verb 003error
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#
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# To the above, add multiple 'error <msg>' events
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test_expect_success 'perf stream, error event' '
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test_when_finished "rm trace.perf actual expect" &&
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GIT_TR2_PERF="$(pwd)/trace.perf" test-tool trace2 003error "hello world" "this is a test" &&
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perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
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cat >expect <<-EOF &&
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d0|main|version|||||$V
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d0|main|start||_T_ABS_|||_EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
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d0|main|cmd_name|||||trace2 (trace2)
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d0|main|error|||||hello world
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d0|main|error|||||this is a test
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d0|main|exit||_T_ABS_|||code:0
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d0|main|atexit||_T_ABS_|||code:0
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EOF
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test_cmp expect actual
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'
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# Verb 004child
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#
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# Test nested spawning of child processes.
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#
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# Conceptually, this looks like:
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# P1: TT trace2 004child
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# P2: |--- TT trace2 004child
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# P3: |--- TT trace2 001return 0
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#
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# Which should generate events:
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# P1: version
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# P1: start
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# P1: cmd_name
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# P1: child_start
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# P2: version
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# P2: start
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# P2: cmd_name
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# P2: child_start
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# P3: version
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# P3: start
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# P3: cmd_name
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# P3: exit
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# P3: atexit
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# P2: child_exit
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# P2: exit
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# P2: atexit
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# P1: child_exit
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# P1: exit
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# P1: atexit
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test_expect_success 'perf stream, child processes' '
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test_when_finished "rm trace.perf actual expect" &&
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GIT_TR2_PERF="$(pwd)/trace.perf" test-tool trace2 004child test-tool trace2 004child test-tool trace2 001return 0 &&
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perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
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cat >expect <<-EOF &&
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d0|main|version|||||$V
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d0|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 004child test-tool trace2 001return 0
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d0|main|cmd_name|||||trace2 (trace2)
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d0|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 004child test-tool trace2 001return 0
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d1|main|version|||||$V
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d1|main|start||_T_ABS_|||_EXE_ trace2 004child test-tool trace2 001return 0
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d1|main|cmd_name|||||trace2 (trace2/trace2)
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d1|main|child_start||_T_ABS_|||[ch0] class:? argv: test-tool trace2 001return 0
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d2|main|version|||||$V
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d2|main|start||_T_ABS_|||_EXE_ trace2 001return 0
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d2|main|cmd_name|||||trace2 (trace2/trace2/trace2)
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d2|main|exit||_T_ABS_|||code:0
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d2|main|atexit||_T_ABS_|||code:0
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d1|main|child_exit||_T_ABS_|_T_REL_||[ch0] pid:_PID_ code:0
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d1|main|exit||_T_ABS_|||code:0
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d1|main|atexit||_T_ABS_|||code:0
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d0|main|child_exit||_T_ABS_|_T_REL_||[ch0] pid:_PID_ code:0
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d0|main|exit||_T_ABS_|||code:0
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d0|main|atexit||_T_ABS_|||code:0
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EOF
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test_cmp expect actual
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'
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sane_unset GIT_TR2_PERF_BRIEF
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# Now test without environment variables and get all Trace2 settings
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# from the global config.
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test_expect_success 'using global config, perf stream, return code 0' '
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test_when_finished "rm trace.perf actual expect" &&
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test_config_global trace2.perfBrief 1 &&
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test_config_global trace2.perfTarget "$(pwd)/trace.perf" &&
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test-tool trace2 001return 0 &&
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perl "$TEST_DIRECTORY/t0211/scrub_perf.perl" <trace.perf >actual &&
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cat >expect <<-EOF &&
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d0|main|version|||||$V
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d0|main|start||_T_ABS_|||_EXE_ trace2 001return 0
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d0|main|cmd_name|||||trace2 (trace2)
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d0|main|exit||_T_ABS_|||code:0
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d0|main|atexit||_T_ABS_|||code:0
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EOF
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test_cmp expect actual
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'
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test_done
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