projects / people / ms / ipfire-3.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 3c926509 MT |
1 | 2011-01-14 Tom Tromey <tromey@redhat.com> |
| 2 | ||
| 3 | * unwind-dw2.c: Include sys/sdt.h if it exists. | |
| 4 | (_Unwind_DebugHook): Use STAP_PROBE2. | |
| 5 | * config.in, configure: Rebuild. | |
| 6 | * configure.ac: Check for sys/sdt.h. | |
| 7 | ||
| 8 | --- gcc/configure.ac | |
| 9 | +++ gcc/configure.ac | |
| 10 | @@ -4313,6 +4313,16 @@ if test x$gcc_cv_libc_provides_ssp = xyes; then | |
| 11 | [Define if your target C library provides stack protector support]) | |
| 12 | fi | |
| 13 | ||
| 14 | +# Test for <sys/sdt.h> on the target. | |
| 15 | +GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H]) | |
| 16 | +AC_MSG_CHECKING(sys/sdt.h in the target C library) | |
| 17 | +have_sys_sdt_h=no | |
| 18 | +if test -f $target_header_dir/sys/sdt.h; then | |
| 19 | + AC_DEFINE(HAVE_SYS_SDT_H, 1, | |
| 20 | + [Define if your target C library provides sys/sdt.h]) | |
| 21 | +fi | |
| 22 | +AC_MSG_RESULT($have_sys_sdt_h) | |
| 23 | + | |
| 24 | # Check if TFmode long double should be used by default or not. | |
| 25 | # Some glibc targets used DFmode long double, but with glibc 2.4 | |
| 26 | # and later they can use TFmode. | |
| 27 | --- gcc/unwind-dw2.c | |
| 28 | +++ gcc/unwind-dw2.c | |
| 29 | @@ -37,6 +37,10 @@ | |
| 30 | #include "gthr.h" | |
| 31 | #include "unwind-dw2.h" | |
| 32 | ||
| 33 | +#ifdef HAVE_SYS_SDT_H | |
| 34 | +#include <sys/sdt.h> | |
| 35 | +#endif | |
| 36 | + | |
| 37 | #ifndef __USING_SJLJ_EXCEPTIONS__ | |
| 38 | ||
| 39 | #ifndef STACK_GROWS_DOWNWARD | |
| 40 | @@ -1493,7 +1497,13 @@ static void | |
| 41 | _Unwind_DebugHook (void *cfa __attribute__ ((__unused__)), | |
| 42 | void *handler __attribute__ ((__unused__))) | |
| 43 | { | |
| 44 | + /* We only want to use stap probes starting with v3. Earlier | |
| 45 | + versions added too much startup cost. */ | |
| 46 | +#if defined (HAVE_SYS_SDT_H) && defined (STAP_PROBE2) && _SDT_NOTE_TYPE >= 3 | |
| 47 | + STAP_PROBE2 (libgcc, unwind, cfa, handler); | |
| 48 | +#else | |
| 49 | asm (""); | |
| 50 | +#endif | |
| 51 | } | |
| 52 | ||
| 53 | /* Install TARGET into CURRENT so that we can return to it. This is a | |
| 54 | ||
| 55 | --- gcc/config.in.jj 2011-01-22 10:21:47.000000000 +0100 | |
| 56 | +++ gcc/config.in 2011-01-22 11:10:39.000000000 +0100 | |
| 57 | @@ -1405,6 +1407,9 @@ | |
| 58 | #endif | |
| 59 | ||
| 60 | ||
| 61 | +/* Define if your target C library provides sys/sdt.h */ | |
| 62 | +#undef HAVE_SYS_SDT_H | |
| 63 | + | |
| 64 | /* Define to 1 if you have the <sys/stat.h> header file. */ | |
| 65 | #ifndef USED_FOR_TARGET | |
| 66 | #undef HAVE_SYS_STAT_H | |
| 67 | --- gcc/configure.jj 2011-01-22 10:20:55.000000000 +0100 | |
| 68 | +++ gcc/configure 2011-01-22 11:10:34.990648298 +0100 | |
| 69 | @@ -25757,6 +25757,19 @@ $as_echo "#define TARGET_LIBC_PROVIDES_S | |
| 70 | ||
| 71 | fi | |
| 72 | ||
| 73 | +# Test for <sys/sdt.h> on the target. | |
| 74 | + | |
| 75 | +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking sys/sdt.h in the target C library" >&5 | |
| 76 | +$as_echo_n "checking sys/sdt.h in the target C library... " >&6; } | |
| 77 | +have_sys_sdt_h=no | |
| 78 | +if test -f $target_header_dir/sys/sdt.h; then | |
| 79 | + | |
| 80 | +$as_echo "#define HAVE_SYS_SDT_H 1" >>confdefs.h | |
| 81 | + | |
| 82 | +fi | |
| 83 | +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_sys_sdt_h" >&5 | |
| 84 | +$as_echo "$have_sys_sdt_h" >&6; } | |
| 85 | + | |
| 86 | # Check if TFmode long double should be used by default or not. | |
| 87 | # Some glibc targets used DFmode long double, but with glibc 2.4 | |
| 88 | # and later they can use TFmode. |