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1. Fix occasional crashes. 2. Improve the performance of the proxy function. 3. Enhanced hook capability. 4. Added hook/unhook operation recording module and data dump API.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| // Copyright (c) 2020-present, ByteDance, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
| // | ||
|
|
||
| // Created by Li Han (hanli.lee@bytedance.com) on 2020-11-04. | ||
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| #include "bh_cfi.h" | ||
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| #if defined(__aarch64__) | ||
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| #include <stdlib.h> | ||
| #include <unistd.h> | ||
| #include <dlfcn.h> | ||
| #include <sys/mman.h> | ||
| #include "bh_util.h" | ||
| #include "bytesig.h" | ||
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| #define BH_CFI_LIB_DL "libdl.so" | ||
| #define BH_CFI_SLOWPATH "__cfi_slowpath" | ||
| #define BH_CFI_SLOWPATH_DIAG "__cfi_slowpath_diag" | ||
| #define BH_CFI_ARM64_RET_INST 0xd65f03c0 | ||
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| int bh_cfi_disable_slowpath(void) | ||
| { | ||
| if(bh_util_get_api_level() < __ANDROID_API_O__) return 0; | ||
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| void *handle = dlopen(BH_CFI_LIB_DL, RTLD_NOW); | ||
| if(NULL == handle) return -1; | ||
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| void *cfi_slowpath = dlsym(handle, BH_CFI_SLOWPATH); | ||
| if(NULL == cfi_slowpath) goto err; | ||
| void *cfi_slowpath_diag = dlsym(handle, BH_CFI_SLOWPATH_DIAG); | ||
| if(NULL == cfi_slowpath_diag) goto err; | ||
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| void *start = cfi_slowpath <= cfi_slowpath_diag ? cfi_slowpath : cfi_slowpath_diag; | ||
| void *end = cfi_slowpath <= cfi_slowpath_diag ? cfi_slowpath_diag : cfi_slowpath; | ||
| if(0 != bh_util_set_protect(start, (void *)((uintptr_t)end + sizeof(uint32_t)), PROT_READ | PROT_WRITE | PROT_EXEC)) goto err; | ||
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| BYTESIG_TRY(SIGSEGV, SIGBUS) | ||
| *((uint32_t *)cfi_slowpath) = BH_CFI_ARM64_RET_INST; | ||
| *((uint32_t *)cfi_slowpath_diag) = BH_CFI_ARM64_RET_INST; | ||
| BYTESIG_CATCH() | ||
| goto err; | ||
| BYTESIG_EXIT | ||
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| __builtin___clear_cache(start, (void *)((size_t)end + sizeof(uint32_t))); | ||
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| dlclose(handle); | ||
| return 0; | ||
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| err: | ||
| dlclose(handle); | ||
| return -1; | ||
| } | ||
|
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| #else | ||
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| int bh_cfi_disable_slowpath(void) | ||
| { | ||
| return 0; | ||
| } | ||
|
|
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| // Copyright (c) 2020-present, ByteDance, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
| // | ||
|
|
||
| // Created by Li Han (hanli.lee@bytedance.com) on 2020-11-04. | ||
|
|
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| #pragma once | ||
|
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| int bh_cfi_disable_slowpath(void); |
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