Patchwork [02/11] linux-user: fix multi-threaded /proc/self/maps

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Submitter riku.voipio@linaro.org
Date Oct. 12, 2012, 12:36 p.m.
Message ID <1bdd7c7ea8a711efcb5141663865cc1f7e4e824d.1350044677.git.riku.voipio@linaro.org>
Download mbox | patch
Permalink /patch/191122/
State New
Headers show

Comments

riku.voipio@linaro.org - Oct. 12, 2012, 12:36 p.m.
From: Alexander Graf <agraf@suse.de>

When reading our faked /proc/self/maps from a secondary thread,
we get an invalid stack entry. This is because ts->stack_base is not
initialized in non-primary threads.

However, ts->info is, and the stack layout information we're looking
for is there too. So let's use that one instead!

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 1a38169..cf0b385 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4962,8 +4962,8 @@  static int open_self_maps(void *cpu_env, int fd)
 #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
     dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0          [stack]\n",
                 (unsigned long long)ts->info->stack_limit,
-                (unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1))
-                                     & TARGET_PAGE_MASK,
+                (unsigned long long)(ts->info->start_stack +
+                                     (TARGET_PAGE_SIZE - 1)) & TARGET_PAGE_MASK,
                 (unsigned long long)0);
 #endif