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author | Kenny Root <kroot@google.com> | 2012-10-12 14:58:28 -0700 |
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committer | Kenny Root <kroot@google.com> | 2012-10-15 08:53:46 -0700 |
commit | 0054cbd4dbb9315419cc3c3b2aa1754a02fff1f4 (patch) | |
tree | cd1283e9c71e1489ee3bf82b2da3f0744c7e6f9b /cmds/interrupter/interrupter.h | |
parent | cee1124052202c7f2a1956a54e5aa538d82197a7 (diff) | |
download | frameworks_base-0054cbd4dbb9315419cc3c3b2aa1754a02fff1f4.zip frameworks_base-0054cbd4dbb9315419cc3c3b2aa1754a02fff1f4.tar.gz frameworks_base-0054cbd4dbb9315419cc3c3b2aa1754a02fff1f4.tar.bz2 |
Add interrupter library to simulate EINTR
To check for robustness against EINTR from syscalls, add an
interrupter library that can be preloaded with LD_PRELOAD.
Change-Id: I0a6cd8702ec5bc6b2927a5e223ee3cdc033860a2
Diffstat (limited to 'cmds/interrupter/interrupter.h')
-rw-r--r-- | cmds/interrupter/interrupter.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/cmds/interrupter/interrupter.h b/cmds/interrupter/interrupter.h new file mode 100644 index 0000000..9ad0277 --- /dev/null +++ b/cmds/interrupter/interrupter.h @@ -0,0 +1,79 @@ +/* + * Copyright 2012, The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define CONCATENATE(arg1, arg2) CONCATENATE1(arg1, arg2) +#define CONCATENATE1(arg1, arg2) CONCATENATE2(arg1, arg2) +#define CONCATENATE2(arg1, arg2) arg1##arg2 + +#define INTERRUPTER(sym) \ + if (real_##sym == NULL) \ + __init_##sym(); \ + if (maybe_interrupt()) { \ + errno = EINTR; \ + return -1; \ + } + +#define CALL_FUNCTION_1(sym, ret, type1) \ +ret (*real_##sym)(type1) = NULL; \ +ret sym(type1 arg1) { \ + INTERRUPTER(sym) \ + return real_##sym(arg1); \ +} + +#define CALL_FUNCTION_2(sym, ret, type1, type2) \ +ret (*real_##sym)(type1, type2) = NULL; \ +ret sym(type1 arg1, type2 arg2) { \ + INTERRUPTER(sym) \ + return real_##sym(arg1, arg2); \ +} + +#define CALL_FUNCTION_3(sym, ret, type1, type2, type3) \ +ret (*real_##sym)(type1, type2, type3) = NULL; \ +ret sym(type1 arg1, type2 arg2, type3 arg3) { \ + INTERRUPTER(sym) \ + return real_##sym(arg1, arg2, arg3); \ +} + +#define CALL_FUNCTION_4(sym, ret, type1, type2, type3, type4) \ +ret (*real_##sym)(type1, type2, type3, type4) = NULL; \ +ret sym(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \ + INTERRUPTER(sym) \ + return real_##sym(arg1, arg2, arg3, arg4); \ +} + +#define CALL_FUNCTION_5(sym, ret, type1, type2, type3, type4, type5) \ +ret (*real_##sym)(type1, type2, type3, type4, type5) = NULL; \ +ret sym(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \ + INTERRUPTER(sym) \ + return real_##sym(arg1, arg2, arg3, arg4, arg5); \ +} + +#define DEFINE_INTERCEPT_N(N, sym, ret, ...) \ +static void __init_##sym(void); \ +CONCATENATE(CALL_FUNCTION_, N)(sym, ret, __VA_ARGS__) \ +static void __init_##sym(void) { \ + real_##sym = dlsym(RTLD_NEXT, #sym); \ + if (real_##sym == NULL) { \ + fprintf(stderr, "Error hooking " #sym ": %s\n", dlerror()); \ + } \ +} + +#define INTERCEPT_NARG(...) INTERCEPT_NARG_N(__VA_ARGS__, INTERCEPT_RSEQ_N()) +#define INTERCEPT_NARG_N(...) INTERCEPT_ARG_N(__VA_ARGS__) +#define INTERCEPT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, N, ...) N +#define INTERCEPT_RSEQ_N() 8, 7, 6, 5, 4, 3, 2, 1, 0 + +#define DEFINE_INTERCEPT(sym, ret, ...) DEFINE_INTERCEPT_N(INTERCEPT_NARG(__VA_ARGS__), sym, ret, __VA_ARGS__) |