Signal and backtrace improvements
This commit is contained in:
Kfir Itzhak
parent
18b72f9617
commit
b5c536b134
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@ -72,11 +72,14 @@ set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS ON)
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check_include_file("linux/videodev.h" HAVE_LINUX_VIDEODEV_H)
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check_include_file("linux/videodev2.h" HAVE_LINUX_VIDEODEV2_H)
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check_include_file("execinfo.h" HAVE_EXECINFO_H)
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check_include_file("siginfo.h" HAVE_SIGINFO_H)
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check_include_file("ucontext.h" HAVE_UCONTEXT_H)
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check_include_file("sys/sendfile.h" HAVE_SYS_SENDFILE_H)
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check_include_file("sys/syscall.h" HAVE_SYS_SYSCALL_H)
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check_function_exists("syscall" HAVE_SYSCALL)
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check_function_exists("sendfile" HAVE_SENDFILE)
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check_function_exists("backtrace" HAVE_DECL_BACKTRACE)
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check_function_exists("backtrace_symbols" HAVE_DECL_BACKTRACE_SYMBOLS)
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check_function_exists("posix_memalign" HAVE_POSIX_MEMALIGN)
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check_function_exists("strsignal" HAVE_STRSIGNAL)
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check_prototype_definition("round" "double round (double x)" "0.0" "math.h" HAVE_DECL_ROUND)
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@ -237,6 +237,7 @@ AC_TYPE_SIGNAL
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AC_CHECK_TYPES(siginfo_t,,,[#include <signal.h>])
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AC_CHECK_TYPES(struct sigcontext,,,[#include <signal.h>])
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AC_CHECK_MEMBERS([struct sigcontext.eip],,,[#include <signal.h>])
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AC_CHECK_MEMBERS([struct sigcontext.rip],,,[#include <signal.h>])
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AC_CHECK_TYPES(ucontext_t,,,[#include <signal.h>])
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# Checks for library functions.
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@ -302,6 +303,8 @@ AC_HEADER_STDC
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AC_CHECK_HEADERS([fcntl.h limits.h memory.h stddef.h stdlib.h string.h strings.h sys/param.h sys/time.h syslog.h unistd.h values.h])
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AC_CHECK_HEADERS([netdb.h netinet/in.h arpa/inet.h sys/ioctl.h sys/socket.h sys/un.h glob.h sys/sendfile.h])
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AC_CHECK_HEADERS(execinfo.h,,,)
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AC_CHECK_HEADERS(siginfo.h,,,)
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AC_CHECK_HEADERS(ucontext.h,,,)
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AC_CHECK_HEADERS(sys/syscall.h,,,)
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AC_CHECK_HEADERS(pthread.h,,,)
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AC_CHECK_HEADERS(linux/videodev.h,AC_SUBST(ZM_HAS_V4L1,1),AC_SUBST(ZM_HAS_V4L1,0),)
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@ -345,6 +348,7 @@ AC_CHECK_DECLS(gnutls_fingerprint,,AC_MSG_ERROR([zm requires gnutls/gnutls.h - u
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fi
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fi
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AC_CHECK_DECLS(backtrace,,,[#include <execinfo.h>])
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AC_CHECK_DECLS(backtrace_symbols,,,[#include <execinfo.h>])
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AC_SUBST(LDFLAGS)
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@ -24,7 +24,11 @@
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#include <string.h>
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#include <stdlib.h>
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#define TRACE_SIZE 16
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bool zm_reload = false;
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bool zm_terminate = false;
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RETSIGTYPE zm_hup_handler( int signal )
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{
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@ -36,7 +40,6 @@ RETSIGTYPE zm_hup_handler( int signal )
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zm_reload = true;
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}
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bool zm_terminate = false;
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RETSIGTYPE zm_term_handler( int signal )
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{
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@ -48,12 +51,10 @@ RETSIGTYPE zm_term_handler( int signal )
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zm_terminate = true;
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}
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#define TRACE_SIZE 16
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#if HAVE_STRUCT_SIGCONTEXT
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RETSIGTYPE zm_die_handler( int signal, struct sigcontext context )
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#elif ( HAVE_SIGINFO_T && HAVE_UCONTEXT_T )
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#include <ucontext.h>
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RETSIGTYPE zm_die_handler( int signal, siginfo_t *info, void *context )
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#else
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RETSIGTYPE zm_die_handler( int signal )
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@ -81,29 +82,37 @@ RETSIGTYPE zm_die_handler( int signal )
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void *trace[TRACE_SIZE];
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int trace_size = 0;
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#if HAVE_STRUCT_SIGCONTEXT_EIP
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Error( "Signal address is %p, from %p", (void *)context.cr2, (void *)context.eip );
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trace_size = backtrace( trace, TRACE_SIZE );
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#if HAVE_STRUCT_SIGCONTEXT
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#if HAVE_STRUCT_SIGCONTEXT_RIP
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Error( "Signal address is %p, from %p", (void *)context.cr2, (void *)context.rip );
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// overwrite sigaction with caller's address
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trace[1] = (void *)context.rip;
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#elif HAVE_STRUCT_SIGCONTEXT_EIP
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Error( "Signal address is %p, from %p", (void *)context.cr2, (void *)context.eip );
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// overwrite sigaction with caller's address
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trace[1] = (void *)context.eip;
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#elif HAVE_STRUCT_SIGCONTEXT
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Error( "Signal address is %p, no eip", (void *)context.cr2 );
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#else
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Error( "Signal address is %p, no instruction pointer", (void *)context.cr2 );
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#endif // HAVE_STRUCT_SIGCONTEXT_*
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trace_size = backtrace( trace, TRACE_SIZE );
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#else // HAVE_STRUCT_SIGCONTEXT
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if ( info && context )
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{
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ucontext_t *uc = (ucontext_t *)context;
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#if defined(__x86_64__)
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Error( "Signal address is %p, from %p", info->si_addr, uc->uc_mcontext.gregs[REG_RIP] );
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// overwrite sigaction with caller's address
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trace[1] = (void *) uc->uc_mcontext.gregs[REG_RIP];
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#else
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Error( "Signal address is %p, from %p", info->si_addr, uc->uc_mcontext.gregs[REG_EIP] );
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trace_size = backtrace( trace, TRACE_SIZE );
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// overwrite sigaction with caller's address
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trace[1] = (void *) uc->uc_mcontext.gregs[REG_EIP];
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#endif // defined(__x86_64__)
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}
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#endif // HAVE_STRUCT_SIGCONTEXT
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#if HAVE_DECL_BACKTRACE
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#if ( HAVE_DECL_BACKTRACE && HAVE_DECL_BACKTRACE_SYMBOLS )
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char cmd[1024] = "addr2line -e ";
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char *cmd_ptr = cmd+strlen(cmd);
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// Try and extract the binary path from the last backtrace frame
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@ -125,13 +134,15 @@ RETSIGTYPE zm_die_handler( int signal )
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}
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Info( "Backtrace complete, please execute the following command for more information" );
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Info( cmd );
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#endif // HAVE_DECL_BACKTRACE
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#endif // ( HAVE_SIGINFO_T && HAVE_UCONTEXT_T ) || HAVE_STRUCT_SIGCONTEXT
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#endif // ( HAVE_DECL_BACKTRACE && HAVE_DECL_BACKTRACE_SYMBOLS )
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#endif // (( HAVE_SIGINFO_T && HAVE_UCONTEXT_T ) || HAVE_STRUCT_SIGCONTEXT )
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#endif // ZM_NO_CRASHTRACE
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exit( signal );
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}
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void zmSetHupHandler( SigHandler *handler )
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{
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sigset_t block_set;
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@ -21,7 +21,17 @@
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#define ZM_SIGNAL_H
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#include <signal.h>
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#if HAVE_EXECINFO_H
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#include <execinfo.h>
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#endif
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#if HAVE_SIGINFO_H
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#include <siginfo.h>
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#endif
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#if HAVE_UCONTEXT_H
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#include <ucontext.h>
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#endif
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#include "zm.h"
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@ -35,7 +45,6 @@ RETSIGTYPE zmc_term_handler( int signal );
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#if HAVE_STRUCT_SIGCONTEXT
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RETSIGTYPE zmc_die_handler( int signal, struct sigcontext context );
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#elif ( HAVE_SIGINFO_T && HAVE_UCONTEXT_T )
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#include <ucontext.h>
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RETSIGTYPE zmc_die_handler( int signal, siginfo_t *info, void *context );
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#else
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RETSIGTYPE zmc_die_handler( int signal );
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@ -7,11 +7,14 @@
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#cmakedefine HAVE_LINUX_VIDEODEV_H 1
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#cmakedefine HAVE_LINUX_VIDEODEV2_H 1
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#cmakedefine HAVE_EXECINFO_H 1
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#cmakedefine HAVE_SIGINFO_H 1
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#cmakedefine HAVE_UCONTEXT_H 1
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#cmakedefine HAVE_SYS_SENDFILE_H 1
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#cmakedefine HAVE_SYS_SYSCALL_H 1
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#cmakedefine HAVE_SYSCALL 1
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#cmakedefine HAVE_SENDFILE 1
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#cmakedefine HAVE_DECL_BACKTRACE 1
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#cmakedefine HAVE_DECL_BACKTRACE_SYMBOLS 1
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#cmakedefine HAVE_POSIX_MEMALIGN 1
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#cmakedefine HAVE_STRSIGNAL 1
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#cmakedefine HAVE_DECL_ROUND 1
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