i#2463: code cache pre-population #2505
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Adds a new API routine dr_prepopulate_cache() meant to be called between dr_app_setup() and dr_app_start() to build up a code cache in parallel with app execution, to avoid the cost of a cold cache upon attach. Fixes some auxiliary issues with building blocks ahead of time from sampling data: + Sets up TLS during bb building for dcontexts but does not enable signal handlers to avoid perturbing the app. + Adds is_DR_segment_reader_entry() to avoid pre-building a problematic self-sampled bb that reads DR segments when DR is a static library and we do not support mangling such reads. + Fixes an initialized-dcontext issue in dr_get_isa_mode(). Adds a test. Fixes #2463
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It's failing to install doxygen, 2x in a row. Hopefully some transient issue. I will run a local Windows test to confirm the Windows build isn't broken. |
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Adds a new API routine dr_prepopulate_cache() meant to be called between
dr_app_setup() and dr_app_start() to build up a code cache in parallel with
app execution, to avoid the cost of a cold cache upon attach.
Fixes some auxiliary issues with building blocks ahead of time from
sampling data:
handlers to avoid perturbing the app.
self-sampled bb that reads DR segments when DR is a static library and we
do not support mangling such reads.
Adds a test.
Fixes #2463