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Currently inferior memory is allocated by inferior mmap() but it is never deallocated; despite the injected objfile incl. its symbols is freed. This was intentional so that one can do for example: inferior: char *str = "foo"; GDB: (gdb) compile code str = "bar"; I believe later patches will be needed to introduce full control over keeping vs. discarding the injected module as being discussed in: compile: objfiles lifetime UI https://sourceware.org/ml/gdb/2015-04/msg00051.html Message-ID: <20150429135735.GA16974@host1.jankratochvil.net> https://sourceware.org/ml/gdb/2015-05/msg00007.html As decided by Phil it is better not to leak inferior pages as users can workaround the issue above for example by: (gdb) compile code str = strdup ("bar"); I have checked that in fact gdb/doc/ (written by Phil) already expects the injected code will be unmapped so that does not need to be changed: compile code int ff = 5; p = &ff; In this example, @code{p} would point to @code{ff} when the @code{compile} command is executing the source code provided to it. However, as variables in the (example) program persist with their assigned values, the variable @code{p} would point to an invalid location when the command exists. gdb/ChangeLog 2015-04-28 Jan Kratochvil <jan.kratochvil@redhat.com> * arch-utils.c (default_infcall_munmap): New. * arch-utils.h (default_infcall_munmap): New declaration. * compile/compile-object-load.c (struct munmap_list, munmap_list_add) (munmap_list_free, munmap_listp_free_cleanup): New. (struct setup_sections_data): Add field munmap_list_headp. (setup_sections): Call munmap_list_add. (compile_object_load): New variable munmap_list_head, initialize setup_sections_data.munmap_list_headp, return munmap_list_head. * compile/compile-object-load.h (struct munmap_list): New declaration. (struct compile_module): Add field munmap_list_head. (munmap_list_free): New declaration. * compile/compile-object-run.c (struct do_module_cleanup): Add field munmap_list_head. (do_module_cleanup): Call munmap_list_free. (compile_object_run): Pass munmap_list_head to do_module_cleanup. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * gdbarch.sh (infcall_munmap): New. * linux-tdep.c (linux_infcall_munmap): New. (linux_init_abi): Install it. gdb/testsuite/ChangeLog 2015-04-28 Jan Kratochvil <jan.kratochvil@redhat.com> * gdb.compile/compile.exp (keep jit in memory): Rename to ... (do not keep jit in memory): ... this. (expect 5): Change it to ... (expect no 5): ... this. |
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| .. | ||
| compile-c-support.c | ||
| compile-c-symbols.c | ||
| compile-c-types.c | ||
| compile-internal.h | ||
| compile-loc2c.c | ||
| compile-object-load.c | ||
| compile-object-load.h | ||
| compile-object-run.c | ||
| compile-object-run.h | ||
| compile.c | ||
| compile.h | ||