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authorEduardo Habkost <ehabkost@redhat.com>2017-08-29 18:20:53 -0300
committerStefan Hajnoczi <stefanha@redhat.com>2017-08-30 09:33:49 +0100
commite916a6e88a4ff6c39cd6f62fb162a561c6b89de8 (patch)
tree3ddd5ad2e3ddf81f538e4b30965010df868e56ba /util/oslib-posix.c
parentd942feec979b1ad669ba43b8c9540a7e3cf75a3f (diff)
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oslib-posix: Print errors before aborting on qemu_alloc_stack()
If QEMU is running on a system that's out of memory and mmap() fails, QEMU aborts with no error message at all, making it hard to debug the reason for the failure. Add perror() calls that will print error information before aborting. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170829212053.6003-1-ehabkost@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'util/oslib-posix.c')
-rw-r--r--util/oslib-posix.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index cacf0ef..80086c5 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -530,6 +530,7 @@ void *qemu_alloc_stack(size_t *sz)
ptr = mmap(NULL, *sz, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (ptr == MAP_FAILED) {
+ perror("failed to allocate memory for stack");
abort();
}
@@ -544,6 +545,7 @@ void *qemu_alloc_stack(size_t *sz)
guardpage = ptr;
#endif
if (mprotect(guardpage, pagesz, PROT_NONE) != 0) {
+ perror("failed to set up stack guard page");
abort();
}