[asan] actually move StackTrace to sanitizer_common
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@162757 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/asan_stack.cc b/lib/asan/asan_stack.cc
index d861133..a69accd 100644
--- a/lib/asan/asan_stack.cc
+++ b/lib/asan/asan_stack.cc
@@ -11,218 +11,14 @@
//
// Code for ASan stack trace.
//===----------------------------------------------------------------------===//
+#include "asan_flags.h"
#include "asan_interface.h"
#include "asan_stack.h"
-#include "sanitizer_common/sanitizer_procmaps.h"
-#include "sanitizer_common/sanitizer_symbolizer.h"
namespace __asan {
static __asan_symbolize_callback symbolize_callback;
-static const char *StripPathPrefix(const char *filepath,
- const char *strip_file_prefix) {
- if (filepath == internal_strstr(filepath, strip_file_prefix))
- return filepath + internal_strlen(strip_file_prefix);
- return filepath;
-}
-
-// ----------------------- StackTrace ----------------------------- {{{1
-// PCs in stack traces are actually the return addresses, that is,
-// addresses of the next instructions after the call. That's why we
-// decrement them.
-static uptr patch_pc(uptr pc) {
-#ifdef __arm__
- // Cancel Thumb bit.
- pc = pc & (~1);
-#endif
- return pc - 1;
-}
-
-void StackTrace::PrintStack(uptr *addr, uptr size,
- bool symbolize, const char *strip_file_prefix,
- SymbolizeCallback symbolize_callback ) {
- MemoryMappingLayout proc_maps;
- uptr frame_num = 0;
- for (uptr i = 0; i < size && addr[i]; i++) {
- uptr pc = patch_pc(addr[i]);
- if (symbolize_callback) {
- char buff[4096];
- symbolize_callback((void*)pc, buff, sizeof(buff));
- // We can't know anything about the string returned by external
- // symbolizer, but if it starts with filename, try to strip path prefix
- // from it.
- Printf(" #%zu 0x%zx %s\n", frame_num, pc,
- StripPathPrefix(buff, strip_file_prefix));
- frame_num++;
- continue;
- }
- AddressInfo addr_frames[64];
- uptr addr_frames_num =
- symbolize ? SymbolizeCode(pc, addr_frames, ARRAY_SIZE(addr_frames)) : 0;
- if (addr_frames_num > 0) {
- for (uptr j = 0; j < addr_frames_num; j++) {
- AddressInfo &info = addr_frames[j];
- Printf(" #%zu 0x%zx", frame_num, pc);
- if (info.function) {
- Printf(" in %s", info.function);
- }
- if (info.file) {
- Printf(" %s:%d:%d", StripPathPrefix(info.file, strip_file_prefix),
- info.line, info.column);
- } else if (info.module) {
- Printf(" (%s+0x%zx)", StripPathPrefix(info.module, strip_file_prefix),
- info.module_offset);
- }
- Printf("\n");
- info.Clear();
- frame_num++;
- }
- } else {
- uptr offset;
- char filename[4096];
- if (proc_maps.GetObjectNameAndOffset(pc, &offset,
- filename, sizeof(filename))) {
- Printf(" #%zu 0x%zx (%s+0x%zx)\n", frame_num, pc,
- StripPathPrefix(filename, strip_file_prefix), offset);
- } else {
- Printf(" #%zu 0x%zx\n", frame_num, pc);
- }
- frame_num++;
- }
- }
-}
-
-uptr StackTrace::GetCurrentPc() {
- return GET_CALLER_PC();
-}
-
-void StackTrace::FastUnwindStack(uptr pc, uptr bp,
- uptr stack_top, uptr stack_bottom) {
- CHECK(size == 0 && trace[0] == pc);
- size = 1;
- uptr *frame = (uptr*)bp;
- uptr *prev_frame = frame;
- while (frame >= prev_frame &&
- frame < (uptr*)stack_top - 2 &&
- frame > (uptr*)stack_bottom &&
- size < max_size) {
- uptr pc1 = frame[1];
- if (pc1 != pc) {
- trace[size++] = pc1;
- }
- prev_frame = frame;
- frame = (uptr*)frame[0];
- }
-}
-
-// On 32-bits we don't compress stack traces.
-// On 64-bits we compress stack traces: if a given pc differes slightly from
-// the previous one, we record a 31-bit offset instead of the full pc.
-SANITIZER_INTERFACE_ATTRIBUTE
-uptr StackTrace::CompressStack(StackTrace *stack, u32 *compressed, uptr size) {
-#if __WORDSIZE == 32
- // Don't compress, just copy.
- uptr res = 0;
- for (uptr i = 0; i < stack->size && i < size; i++) {
- compressed[i] = stack->trace[i];
- res++;
- }
- if (stack->size < size)
- compressed[stack->size] = 0;
-#else // 64 bits, compress.
- uptr prev_pc = 0;
- const uptr kMaxOffset = (1ULL << 30) - 1;
- uptr c_index = 0;
- uptr res = 0;
- for (uptr i = 0, n = stack->size; i < n; i++) {
- uptr pc = stack->trace[i];
- if (!pc) break;
- if ((s64)pc < 0) break;
- // Printf("C pc[%zu] %zx\n", i, pc);
- if (prev_pc - pc < kMaxOffset || pc - prev_pc < kMaxOffset) {
- uptr offset = (s64)(pc - prev_pc);
- offset |= (1U << 31);
- if (c_index >= size) break;
- // Printf("C co[%zu] offset %zx\n", i, offset);
- compressed[c_index++] = offset;
- } else {
- uptr hi = pc >> 32;
- uptr lo = (pc << 32) >> 32;
- CHECK((hi & (1 << 31)) == 0);
- if (c_index + 1 >= size) break;
- // Printf("C co[%zu] hi/lo: %zx %zx\n", c_index, hi, lo);
- compressed[c_index++] = hi;
- compressed[c_index++] = lo;
- }
- res++;
- prev_pc = pc;
- }
- if (c_index < size)
- compressed[c_index] = 0;
- if (c_index + 1 < size)
- compressed[c_index + 1] = 0;
-#endif // __WORDSIZE
-
- // debug-only code
-#if 0
- StackTrace check_stack;
- UncompressStack(&check_stack, compressed, size);
- if (res < check_stack.size) {
- Printf("res %zu check_stack.size %zu; c_size %zu\n", res,
- check_stack.size, size);
- }
- // |res| may be greater than check_stack.size, because
- // UncompressStack(CompressStack(stack)) eliminates the 0x0 frames.
- CHECK(res >= check_stack.size);
- CHECK(0 == REAL(memcmp)(check_stack.trace, stack->trace,
- check_stack.size * sizeof(uptr)));
-#endif
-
- return res;
-}
-
-SANITIZER_INTERFACE_ATTRIBUTE
-void StackTrace::UncompressStack(StackTrace *stack,
- u32 *compressed, uptr size) {
-#if __WORDSIZE == 32
- // Don't uncompress, just copy.
- stack->size = 0;
- for (uptr i = 0; i < size && i < kStackTraceMax; i++) {
- if (!compressed[i]) break;
- stack->size++;
- stack->trace[i] = compressed[i];
- }
-#else // 64 bits, uncompress
- uptr prev_pc = 0;
- stack->size = 0;
- for (uptr i = 0; i < size && stack->size < kStackTraceMax; i++) {
- u32 x = compressed[i];
- uptr pc = 0;
- if (x & (1U << 31)) {
- // Printf("U co[%zu] offset: %x\n", i, x);
- // this is an offset
- s32 offset = x;
- offset = (offset << 1) >> 1; // remove the 31-byte and sign-extend.
- pc = prev_pc + offset;
- CHECK(pc);
- } else {
- // CHECK(i + 1 < size);
- if (i + 1 >= size) break;
- uptr hi = x;
- uptr lo = compressed[i+1];
- // Printf("U co[%zu] hi/lo: %zx %zx\n", i, hi, lo);
- i++;
- pc = (hi << 32) | lo;
- if (!pc) break;
- }
- // Printf("U pc[%zu] %zx\n", stack->size, pc);
- stack->trace[stack->size++] = pc;
- prev_pc = pc;
- }
-#endif // __WORDSIZE
-}
-
void PrintStack(StackTrace *stack) {
stack->PrintStack(stack->trace, stack->size, flags()->symbolize,
flags()->strip_path_prefix, symbolize_callback);