135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
//===-- asan_linux.cc -----------------------------------------------------===//
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of AddressSanitizer, an address sanity checker.
|
|
//
|
|
// Linux-specific details.
|
|
//===----------------------------------------------------------------------===//
|
|
#ifdef __linux__
|
|
|
|
#include "asan_interceptors.h"
|
|
#include "asan_internal.h"
|
|
#include "asan_thread.h"
|
|
#include "asan_thread_registry.h"
|
|
#include "sanitizer_common/sanitizer_libc.h"
|
|
#include "sanitizer_common/sanitizer_procmaps.h"
|
|
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <unwind.h>
|
|
|
|
#if !ASAN_ANDROID
|
|
// FIXME: where to get ucontext on Android?
|
|
#include <sys/ucontext.h>
|
|
#endif
|
|
|
|
extern "C" void* _DYNAMIC;
|
|
|
|
namespace __asan {
|
|
|
|
void MaybeReexec() {
|
|
// No need to re-exec on Linux.
|
|
}
|
|
|
|
void *AsanDoesNotSupportStaticLinkage() {
|
|
// This will fail to link with -static.
|
|
return &_DYNAMIC; // defined in link.h
|
|
}
|
|
|
|
void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
|
|
#if ASAN_ANDROID
|
|
*pc = *sp = *bp = 0;
|
|
#elif defined(__arm__)
|
|
ucontext_t *ucontext = (ucontext_t*)context;
|
|
*pc = ucontext->uc_mcontext.arm_pc;
|
|
*bp = ucontext->uc_mcontext.arm_fp;
|
|
*sp = ucontext->uc_mcontext.arm_sp;
|
|
# elif defined(__x86_64__)
|
|
ucontext_t *ucontext = (ucontext_t*)context;
|
|
*pc = ucontext->uc_mcontext.gregs[REG_RIP];
|
|
*bp = ucontext->uc_mcontext.gregs[REG_RBP];
|
|
*sp = ucontext->uc_mcontext.gregs[REG_RSP];
|
|
# elif defined(__i386__)
|
|
ucontext_t *ucontext = (ucontext_t*)context;
|
|
*pc = ucontext->uc_mcontext.gregs[REG_EIP];
|
|
*bp = ucontext->uc_mcontext.gregs[REG_EBP];
|
|
*sp = ucontext->uc_mcontext.gregs[REG_ESP];
|
|
# elif defined(__powerpc__) || defined(__powerpc64__)
|
|
ucontext_t *ucontext = (ucontext_t*)context;
|
|
*pc = ucontext->uc_mcontext.regs->nip;
|
|
*sp = ucontext->uc_mcontext.regs->gpr[PT_R1];
|
|
// The powerpc{,64}-linux ABIs do not specify r31 as the frame
|
|
// pointer, but GCC always uses r31 when we need a frame pointer.
|
|
*bp = ucontext->uc_mcontext.regs->gpr[PT_R31];
|
|
# elif defined(__sparc__)
|
|
ucontext_t *ucontext = (ucontext_t*)context;
|
|
uptr *stk_ptr;
|
|
# if defined (__arch64__)
|
|
*pc = ucontext->uc_mcontext.mc_gregs[MC_PC];
|
|
*sp = ucontext->uc_mcontext.mc_gregs[MC_O6];
|
|
stk_ptr = (uptr *) (*sp + 2047);
|
|
*bp = stk_ptr[15];
|
|
# else
|
|
*pc = ucontext->uc_mcontext.gregs[REG_PC];
|
|
*sp = ucontext->uc_mcontext.gregs[REG_O6];
|
|
stk_ptr = (uptr *) *sp;
|
|
*bp = stk_ptr[15];
|
|
# endif
|
|
#else
|
|
# error "Unsupported arch"
|
|
#endif
|
|
}
|
|
|
|
bool AsanInterceptsSignal(int signum) {
|
|
return signum == SIGSEGV && flags()->handle_segv;
|
|
}
|
|
|
|
void AsanPlatformThreadInit() {
|
|
// Nothing here for now.
|
|
}
|
|
|
|
void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, bool fast) {
|
|
#if defined(__arm__) || \
|
|
defined(__powerpc__) || defined(__powerpc64__) || \
|
|
defined(__sparc__)
|
|
fast = false;
|
|
#endif
|
|
if (!fast)
|
|
return stack->SlowUnwindStack(pc, max_s);
|
|
stack->size = 0;
|
|
stack->trace[0] = pc;
|
|
if (max_s > 1) {
|
|
stack->max_size = max_s;
|
|
if (!asan_inited) return;
|
|
if (AsanThread *t = asanThreadRegistry().GetCurrent())
|
|
stack->FastUnwindStack(pc, bp, t->stack_top(), t->stack_bottom());
|
|
}
|
|
}
|
|
|
|
#if !ASAN_ANDROID
|
|
void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
|
|
ucontext_t *ucp = (ucontext_t*)context;
|
|
*stack = (uptr)ucp->uc_stack.ss_sp;
|
|
*ssize = ucp->uc_stack.ss_size;
|
|
}
|
|
#else
|
|
void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
|
|
UNIMPLEMENTED();
|
|
}
|
|
#endif
|
|
|
|
} // namespace __asan
|
|
|
|
#endif // __linux__
|