f4ad82b3bc
procfs.c has accumulated several compilation errors lately (some of them
new with GCC 12), which are fixed by this patch:
* auxv_parse gets:
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:144:7: error: int
procfs_target::auxv_parse(gdb_byte**, gdb_byte*, CORE_ADDR*, CORE_ADDR*)
marked override, but does not override
144 | int auxv_parse (gdb_byte **readptr,
| ^~~~~~~~~~
Obviouly, procfs.c was missed in the auxv_parse constification.
* dead_procinfo has:
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c: In function void
dead_procinfo(procinfo*, const char*, int):
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:563:11: warning: the address
of procinfo::pathname will never be NULL [-Waddress]
563 | if (pi->pathname)
| ~~~~^~~~~~~~
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:238:8: note:
procinfo::pathname declared here
238 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
| ^~~~~~~~
The warning is correct, so the code can lose support for the NULL
pathname case.
* create_inferior has this ugly warning:
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c: In member function virtual void procfs_target::create_inferior(const char*, const std::string&, char**, int):
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:2815:19: warning: char* std::strncpy(char*, const char*, size_t) output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
2815 | strncpy (tryname, p, len);
| ~~~~~~~~^~~~~~~~~~~~~~~~~
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:2814:26: note: length computed here
2814 | len = strlen (p);
| ~~~~~~~^~~
It seems that this is another case of GCC PR middle-end/88059, which
Martin Sebor refuses to fix. So I'm using the hack suggested in the
PR to use memcpy instead of strncpy.
* find_memory_regions_callback fails with
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c: In function int find_memory_regions_callback(prmap*, find_memory_region_ftype, void*):
/vol/src/gnu/gdb/hg/master/dist/gdb/procfs.c:3167:18: error: too few arguments to function
3167 | return (*func) ((CORE_ADDR) map->pr_vaddr,
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
3168 | map->pr_size,
| ~~~~~~~~~~~~~
3169 | (map->pr_mflags & MA_READ) != 0,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3170 | (map->pr_mflags & MA_WRITE) != 0,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3171 | (map->pr_mflags & MA_EXEC) != 0,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3172 | 1, /* MODIFIED is unknown, pass it as true. */
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3173 | data);
| ~~~~~
Again, procfs.c was overlooked when adding the new memory_tagged arg.
Unfortunately, it wasn't even documented in gdb/defs.h when it was
added in
commit 68cffbbd4406b4efe1aa6e18460b1d7ca02549f1
Author: Luis Machado <luis.machado@arm.com>
Date: Thu Mar 31 11:42:35 2022 +0100
[AArch64] MTE corefile support
With those changes, procfs.c compiles again. Together with the hack
from the Solaris gdbsupport breakage reported in PR build/29791, I was
able to build and test gdb on both amd64-pc-solaris2.11 and
sparcv9-sun-solaris2.11.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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