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.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
v1: https://lists.gnu.org/archive/html/qemu-devel/2023-08/msg00848.html
v1 -> v2: Fix a build issue when TARGET_VSYSCALL_PAGE is set.
linux-user/syscall.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7c2c2f6e2fa..3dd493486f6 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8037,7 +8037,7 @@ static int open_self_cmdline(CPUArchState *cpu_env, int fd)
return 0;
}
-static void show_smaps(int fd, unsigned long size)
+static void show_smaps(int fd, unsigned long size, int flags)
{
unsigned long page_size_kb = TARGET_PAGE_SIZE >> 10;
unsigned long size_kb = size >> 10;
@@ -8053,7 +8053,7 @@ static void show_smaps(int fd, unsigned long size)
"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"
@@ -8063,7 +8063,9 @@ static void show_smaps(int fd, unsigned long size)
"Swap: 0 kB\n"
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
- "THPeligible: 0\n", size_kb, page_size_kb, page_size_kb);
+ "THPeligible: 0\n",
+ size_kb, page_size_kb, page_size_kb,
+ (flags & PAGE_ANON) ? size_kb : 0);
}
static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
@@ -8114,7 +8116,7 @@ static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
dprintf(fd, "\n");
}
if (smaps) {
- show_smaps(fd, max - min);
+ show_smaps(fd, max - min, flags);
dprintf(fd, "VmFlags:%s%s%s%s%s%s%s%s\n",
(flags & PAGE_READ) ? " rd" : "",
(flags & PAGE_WRITE_ORG) ? " wr" : "",
@@ -8140,7 +8142,7 @@ static int open_self_maps_1(CPUArchState *cpu_env, int fd, bool smaps)
TARGET_VSYSCALL_PAGE, TARGET_VSYSCALL_PAGE + TARGET_PAGE_SIZE);
dprintf(fd, "%*s%s\n", 73 - count, "", "[vsyscall]");
if (smaps) {
- show_smaps(fd, TARGET_PAGE_SIZE);
+ show_smaps(fd, TARGET_PAGE_SIZE, PAGE_EXEC);
dprintf(fd, "VmFlags: ex\n");
}
#endif
--
2.41.0