i#3161: Add pure-static-client-DR-app support #7177
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Adds support for statically linking a client and DR into a pure-static application. The code support for this involves expecting to not find symbols via dlsym and to instead directly invoke dr_client_main(). A weak copy of dr_client_main() is added to avoid problems with static DR used in standalone mode. Since even static client libraries today pull in the shared DR library, getting CMake to build a pure static binary with a client occupies the bulk of the changes here: + A new cmake routine configure_DynamoRIO_static_client() is added which links with dynamorio_static instead of dynamorio. + Static libz libraries are identified in an admittedly hacky manner. + A new client library variant "_drstatic" is added (alongside today's base shared library and "_static" variant) for all the ext/ libraries. This is identical to "_static" except it uses configure_DynamoRIO_static_client(). A drmemtrace_drstatic variant is also added, which also links with static libz. A new test tool.drcacheoff.purestatic is added which verifies that a static client and DR linked into a pure-static binary all work together. Fixes #3161
…eak sym attempt on Windows
…Ubuntu22 test list; remove libc6-dev packages
…EAK_MAIN is defined, which is only true for a new drmemtrace_weakmain target. This is require to avoid collisions with the new weak dr_client_main in dynamrio_static. The drmemtrace_drstatic does not define DRMEMTRACE_WEAK_MAIN so the new test is updated to not expect those output lines.
…ine dr_client_main; rm assert from weak main b/c non-client uses run it
…in external build
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Perhaps you meant to request review and not assign the PR to me? |
Oops, yes. Fixed. |
abhinav92003
approved these changes
Jan 10, 2025
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Adds support for statically linking a client and DR into a pure-static application.
The code support for this involves expecting to not find symbols via dlsym and to instead directly invoke dr_client_main(). A weak copy of dr_client_main() is added to avoid problems with static DR used in standalone mode.
Since even static client libraries today pull in the shared DR library, getting CMake to build a pure static binary with a client occupies the bulk of the changes here:
A new cmake routine configure_DynamoRIO_static_client() is added which links with dynamorio_static instead of dynamorio.
Static libz libraries are identified in an admittedly hacky manner.
A new client library variant "_drstatic" is added (alongside today's base shared library and "_static" variant) for all the ext/ libraries. This is identical to "_static" except it uses configure_DynamoRIO_static_client(). A drmemtrace_drstatic variant is also added, which also links with static libz.
The drmemtrace weak dr_client_main no longer works with the new dynamorio_static weak symbol so it is instead made strong and removed completely when DRMEMTRACE_NO_MAIN is defined; a drmemtrace_nomain variant is created with this set.
A new test tool.drcacheoff.purestatic is added which verifies that a static client and DR linked into a pure-static binary all work together. It is difficult to get it to link on Ubuntu20, when cross-compiling, and in other setups due to the need for a static libpthread and other requirements, so the test is limited to Ubuntu22 64-bit where it is added to the test list there and confirmed to be built and run:
Fixes #3161