diff options
Diffstat (limited to 'linker/debugger.c')
| -rw-r--r-- | linker/debugger.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/linker/debugger.c b/linker/debugger.c index 5bb065c..1bd3cc8 100644 --- a/linker/debugger.c +++ b/linker/debugger.c @@ -32,6 +32,7 @@ #include <ctype.h> #include <signal.h> #include <sys/mman.h> +#include <errno.h> #include "linker.h" @@ -40,6 +41,11 @@ void notify_gdb_of_libraries(); +#define RETRY_ON_EINTR(ret,cond) \ + do { \ + ret = (cond); \ + } while (ret < 0 && errno == EINTR) + void debugger_signal_handler(int n) { unsigned tid; @@ -58,10 +64,15 @@ void debugger_signal_handler(int n) * is paranoid and will verify that we are giving a tid * that's actually in our process */ - write(s, &tid, sizeof(unsigned)); + int ret; - read(s, &tid, 1); - notify_gdb_of_libraries(); + RETRY_ON_EINTR(ret, write(s, &tid, sizeof(unsigned))); + if (ret == sizeof(unsigned)) { + /* if the write failed, there is no point to read on + * the file descriptor. */ + RETRY_ON_EINTR(ret, read(s, &tid, 1)); + notify_gdb_of_libraries(); + } close(s); } |