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Add syscall errno stats to syscall_mix drmemtrace analyzer #7381

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derekbruening opened this issue Mar 19, 2025 · 0 comments · Fixed by #7390
Closed

Add syscall errno stats to syscall_mix drmemtrace analyzer #7381

derekbruening opened this issue Mar 19, 2025 · 0 comments · Fixed by #7390
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@derekbruening
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Component-DrMemtrace Type-Feature

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@derekbruening
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For studying drmemtrace context switch fidelity, I want to know how often syscalls are interrupted by EINTR. I'm thinking of augmenting syscall_mix with a map of errno values to counts. Would be nice to have the DR API or drsyscall API for cross-platform failure value support: but for now could start out with just Linux errno support.
@derekbruening derekbruening self-assigned this Mar 19, 2025
derekbruening added a commit that referenced this issue Mar 20, 2025
@derekbruening
i#7381: Record syscall failure stats in syscall_mix tool
056a6d9 
Augments the syscall_mix tool to record a map from syscall failure
codes to counts. The caveat is that the trace only contains this
information explicitly for syscall that were traced with
`-record_syscall`.

Generalizes the syscall_mix results in a statistics_t struct with an accessor.

Adds testing to the burst_syscall_inject test by adding failing
syscall, running syscall_mix, accessing its stats, and confirming the
results.

Fixes #7381
@derekbruening derekbruening mentioned this issue Mar 20, 2025
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derekbruening added a commit that referenced this issue Mar 21, 2025
@derekbruening
i#7381: Record syscall failure stats in syscall_mix tool (#7390)
eaae588 
Augments the syscall_mix tool to record a map from syscall failure
codes to counts for each syscall number. The caveat is that the trace only
contains this information explicitly for syscall that were traced with
`-record_syscall`.

Generalizes the syscall_mix results in a statistics_t struct with an
accessor.

Adds testing to the burst_syscall_inject test by adding failing
syscalls, running syscall_mix, accessing its stats, and confirming the
results.

Fixes #7381
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i#7381: Record syscall failure stats in syscall_mix tool DynamoRIO/dynamorio
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@derekbruening