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This patch is to add a test case to on the performance of GDB handling
load and unload of shared library.
In V4:
- Handle malloc and dlopen failure,
- Document test parameters.
In V3, there are some changes,
- Adapt to perf test framework changes.
- Measure load and unload separately.
In V2, there are some changes,
- A new proc gdb_produce_source to produce source files. I tried to
move all source file generation code out of solib.exp, but
compilation step still needs to know the generated file names. I
have to hard-code the file names in compilation step, which is not
good to me, so I give up on this moving.
- SOLIB_NUMBER -> SOLIB_COUNT
- New variable SOLIB_DLCLOSE_REVERSED_ORDER to control the order of
iterating a list of shared libs to dlclose them.
- New variable GDB_PERFORMANCE to enable these perf test cases.
- Remove dlsym call in solib.c.
- Update solib.py for the updated framework.
gdb/testsuite/
* lib/gdb.exp (gdb_produce_source): New procedure.
* gdb.perf/solib.c: New.
* gdb.perf/solib.exp: New.
* gdb.perf/solib.py: New.
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