diff --git a/configure.ac b/configure.ac index 53335b1d1..8b9cbc913 100644 --- a/configure.ac +++ b/configure.ac @@ -308,6 +308,13 @@ AC_CHECK_HEADER([execinfo.h],[ ])] ) +PKG_CHECK_MODULES(LIBUNWIND, libunwind, [HAVE_LIBUNWIND=yes], [HAVE_LIBUNWIND=no]) +if test "x$HAVE_LIBUNWIND" = xyes; then + AC_DEFINE(HAVE_LIBUNWIND, 1, [Have libunwind support]) +fi +AM_CONDITIONAL(HAVE_LIBUNWIND, [test "x$HAVE_LIBUNWIND" = xyes]) + + dnl --------------------------------------------------------------------------- dnl Bus options and CPU capabilities. Replaces logic in dnl hw/xfree86/os-support/bus/Makefile.am, among others. @@ -1336,7 +1343,7 @@ AC_DEFINE(BIGREQS, 1, [Support BigRequests extension]) if test "x$SPECIAL_DTRACE_OBJECTS" = "xyes" ; then DIX_LIB='$(top_builddir)/dix/dix.O' - OS_LIB='$(top_builddir)/os/os.O $(SHA1_LIBS) $(DLOPEN_LIBS)' + OS_LIB='$(top_builddir)/os/os.O $(SHA1_LIBS) $(DLOPEN_LIBS) $(LIBUNWIND_LIBS)' else DIX_LIB='$(top_builddir)/dix/libdix.la' OS_LIB='$(top_builddir)/os/libos.la' diff --git a/include/dix-config.h.in b/include/dix-config.h.in index e1cb9eb51..a643dfcc8 100644 --- a/include/dix-config.h.in +++ b/include/dix-config.h.in @@ -60,6 +60,9 @@ /* Has backtrace support */ #undef HAVE_BACKTRACE +/* Has libunwind support */ +#undef HAVE_LIBUNWIND + /* Define to 1 if you have the header file. */ #undef HAVE_BYTESWAP_H diff --git a/os/Makefile.am b/os/Makefile.am index 88914852f..364b6da2d 100644 --- a/os/Makefile.am +++ b/os/Makefile.am @@ -34,6 +34,11 @@ if XDMCP libos_la_SOURCES += $(XDMCP_SRCS) endif +if HAVE_LIBUNWIND +AM_CFLAGS += $(LIBUNWIND_CFLAGS) +libos_la_LIBADD += $(LIBUNWIND_LIBS) +endif + EXTRA_DIST = $(SECURERPC_SRCS) $(XDMCP_SRCS) if SPECIAL_DTRACE_OBJECTS diff --git a/os/backtrace.c b/os/backtrace.c index daac60cf6..426f9b15b 100644 --- a/os/backtrace.c +++ b/os/backtrace.c @@ -30,6 +30,80 @@ #include #include +#ifdef HAVE_LIBUNWIND + +#define UNW_LOCAL_ONLY +#include + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif +#include + +void +xorg_backtrace(void) +{ + unw_cursor_t cursor; + unw_context_t context; + unw_word_t off; + unw_proc_info_t pip; + int ret, i = 0; + char procname[256]; + const char *filename; + Dl_info dlinfo; + + pip.unwind_info = NULL; + ret = unw_getcontext(&context); + if (ret) { + ErrorFSigSafe("unw_getcontext failed: %s [%d]\n", unw_strerror(ret), + ret); + return; + } + + ret = unw_init_local(&cursor, &context); + if (ret) { + ErrorFSigSafe("unw_init_local failed: %s [%d]\n", unw_strerror(ret), + ret); + return; + } + + ErrorFSigSafe("\n"); + ErrorFSigSafe("Backtrace:\n"); + ret = unw_step(&cursor); + while (ret > 0) { + ret = unw_get_proc_info(&cursor, &pip); + if (ret) { + ErrorFSigSafe("unw_get_proc_info failed: %s [%d]\n", + unw_strerror(ret), ret); + break; + } + + ret = unw_get_proc_name(&cursor, procname, 256, &off); + if (ret && ret != -UNW_ENOMEM) { + if (ret != -UNW_EUNSPEC) + ErrorFSigSafe("unw_get_proc_name failed: %s [%d]\n", + unw_strerror(ret), ret); + procname[0] = '?'; + procname[1] = 0; + } + + if (dladdr((void *)(pip.start_ip + off), &dlinfo) && dlinfo.dli_fname && + *dlinfo.dli_fname) + filename = dlinfo.dli_fname; + else + filename = "?"; + + ErrorFSigSafe("%u: %s (%s%s+0x%x) [%p]\n", i++, filename, procname, + ret == -UNW_ENOMEM ? "..." : "", (int)off, + (void *)(pip.start_ip + off)); + + ret = unw_step(&cursor); + if (ret < 0) + ErrorFSigSafe("unw_step failed: %s [%d]\n", unw_strerror(ret), ret); + } + ErrorFSigSafe("\n"); +} +#else /* HAVE_LIBUNWIND */ #ifdef HAVE_BACKTRACE #ifndef _GNU_SOURCE #define _GNU_SOURCE @@ -246,3 +320,4 @@ xorg_backtrace(void) #endif #endif +#endif