dumbfb: improve exception texts

diff --git a/libkms++/dumbframebuffer.cpp b/libkms++/dumbframebuffer.cpp
index d1e40ffb028a10cce6bacf985413f8092840aae7..0779b05469db4b9bdf1ac9887e2cfa36969faa6b 100644 (file)
--- a/libkms++/dumbframebuffer.cpp
+++ b/libkms++/dumbframebuffer.cpp
@@ -83,7 +83,7 @@ void DumbFramebuffer::Create()
                creq.bpp = pi.bitspp;
                r = drmIoctl(card().fd(), DRM_IOCTL_MODE_CREATE_DUMB, &creq);
                if (r)
-                       throw std::invalid_argument("foo");
+                       throw invalid_argument(string("DRM_IOCTL_MODE_CREATE_DUMB failed") + strerror(errno));
 
                plane.handle = creq.handle;
                plane.stride = creq.pitch;
@@ -100,13 +100,13 @@ void DumbFramebuffer::Create()
                mreq.handle = plane.handle;
                r = drmIoctl(card().fd(), DRM_IOCTL_MODE_MAP_DUMB, &mreq);
                if (r)
-                       throw std::invalid_argument("foo");
+                       throw invalid_argument(string("DRM_IOCTL_MODE_MAP_DUMB failed") + strerror(errno));
 
                /* perform actual memory mapping */
                m_planes[i].map = (uint8_t *)mmap(0, plane.size, PROT_READ | PROT_WRITE, MAP_SHARED,
                                                  card().fd(), mreq.offset);
                if (plane.map == MAP_FAILED)
-                       throw std::invalid_argument("foo");
+                       throw invalid_argument(string("mmap failed: ") + strerror(errno));
 
                /* clear the framebuffer to 0 */
                memset(plane.map, 0, plane.size);
@@ -120,7 +120,7 @@ void DumbFramebuffer::Create()
        r = drmModeAddFB2(card().fd(), width(), height(), (uint32_t)format(),
                          bo_handles, pitches, offsets, &id, 0);
        if (r)
-               throw std::invalid_argument("foo");
+               throw invalid_argument(string("drmModeAddFB2 failed: ") + strerror(errno));
 
        set_id(id);
 }