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linux-user: Emulate the Anonymous: keyword in /proc/self/smaps

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Core dumps produced by gdb's gcore when connected to qemu's gdbstub
lack stack. The reason is that gdb includes only anonymous memory in
core dumps, which is distinguished by a non-0 Anonymous: value.

Consider the mappings with PAGE_ANON fully anonymous, and the mappings
without it fully non-anonymous.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
[rth: Update for open_self_maps_* rewrite]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2023-08-23 17:55:33 -07:00 committed by Richard Henderson
parent 92d2a03f04
commit 6467d9eb49
1 changed files with 2 additions and 1 deletions
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3
linux-user/syscall.c
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@ -8167,7 +8167,7 @@ static void open_self_maps_4(const struct open_self_maps_data *d,
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"Anonymous: %lu kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
@ -8180,6 +8180,7 @@ static void open_self_maps_4(const struct open_self_maps_data *d,
"THPeligible: 0\n"
"VmFlags:%s%s%s%s%s%s%s%s\n",
size_kb, page_size_kb, page_size_kb,
(flags & PAGE_ANON ? size_kb : 0),
(flags & PAGE_READ) ? " rd" : "",
(flags & PAGE_WRITE_ORG) ? " wr" : "",
(flags & PAGE_EXEC) ? " ex" : "",