accel/tcg: Take mmap lock in the whole cpu_memory_rw_debug() function
Simplify user implementation of cpu_memory_rw_debug() by
taking the mmap lock globally. See commit 87ab2704296
("linux-user: Allow gdbstub to ignore page protection")
for why this lock is necessary.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250217130610.18313-4-philmd@linaro.org>
diff --git a/cpu-target.c b/cpu-target.c
index 20933bd..b5230ce 100644
--- a/cpu-target.c
+++ b/cpu-target.c
@@ -380,6 +380,8 @@
int ret = -1;
int fd = -1;
+ mmap_lock();
+
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
l = (page + TARGET_PAGE_SIZE) - addr;
@@ -414,11 +416,9 @@
* be under mmap_lock() in order to prevent the creation of
* another TranslationBlock in between.
*/
- mmap_lock();
tb_invalidate_phys_range(addr, addr + l - 1);
written = pwrite(fd, buf, l,
(off_t)(uintptr_t)g2h_untagged(addr));
- mmap_unlock();
if (written != l) {
goto out_close;
}
@@ -454,6 +454,8 @@
close(fd);
}
out:
+ mmap_unlock();
+
return ret;
}
#endif
