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Merge "Allow native_bridge to intercept __get_thread()->stack_top"

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Treehugger Robot 2020-08-07 05:52:52 +00:00 committed by Gerrit Code Review
commit cc8f1ea9e1
1 changed files with 8 additions and 2 deletions
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10
libc/bionic/android_unsafe_frame_pointer_chase.cpp
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@ -28,8 +28,14 @@
#include "platform/bionic/android_unsafe_frame_pointer_chase.h" #include "platform/bionic/android_unsafe_frame_pointer_chase.h"
#include "pthread_internal.h"
#include "platform/bionic/mte.h" #include "platform/bionic/mte.h"
#include "private/bionic_defs.h"
#include "pthread_internal.h"
__BIONIC_WEAK_FOR_NATIVE_BRIDGE
extern "C" __LIBC_HIDDEN__ uintptr_t __get_thread_stack_top() {
return __get_thread()->stack_top;
}
/* /*
* Implement fast stack unwinding for stack frames with frame pointers. Stores at most num_entries * Implement fast stack unwinding for stack frames with frame pointers. Stores at most num_entries
@ -56,7 +62,7 @@ __attribute__((no_sanitize("address", "hwaddress"))) size_t android_unsafe_frame
}; };
auto begin = reinterpret_cast<uintptr_t>(__builtin_frame_address(0)); auto begin = reinterpret_cast<uintptr_t>(__builtin_frame_address(0));
uintptr_t end = __get_thread()->stack_top; auto end = __get_thread_stack_top();
stack_t ss; stack_t ss;
if (sigaltstack(nullptr, &ss) == 0 && (ss.ss_flags & SS_ONSTACK)) { if (sigaltstack(nullptr, &ss) == 0 && (ss.ss_flags & SS_ONSTACK)) {