YQL-17711: Fix backtrace

Author: MrLolthe1st

ydb/library/yql/utils/backtrace/backtrace_in_context.cpp

@@ -1,37 +1,45 @@
-#include <contrib/libs/libunwind/include/libunwind.h>
+#include <libunwind.h>
 #include <signal.h>
+#include <util/system/compiler.h>
 
-size_t BackTrace(void** p, size_t len, ucontext_t* signal_ucontext) {
-    unw_context_t unw_context = {};
-    unw_getcontext(&unw_context);
-    unw_cursor_t  unw_cursor = {};
-    unw_init_local(&unw_cursor, &unw_context);
-    const sigcontext* signal_mcontext = (const sigcontext*)&(signal_ucontext->uc_mcontext);
-    
-    unw_set_reg(&unw_cursor, UNW_X86_64_RSI, signal_mcontext->rsi);
-    unw_set_reg(&unw_cursor, UNW_X86_64_RDI, signal_mcontext->rdi);
-    unw_set_reg(&unw_cursor, UNW_X86_64_RBP, signal_mcontext->rbp);
-    unw_set_reg(&unw_cursor, UNW_X86_64_RAX, signal_mcontext->rax);
-    unw_set_reg(&unw_cursor, UNW_X86_64_RBX, signal_mcontext->rbx);
-    unw_set_reg(&unw_cursor, UNW_X86_64_RCX, signal_mcontext->rcx);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R8, signal_mcontext->r8);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R9, signal_mcontext->r9);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R10, signal_mcontext->r10);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R11, signal_mcontext->r11);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R12, signal_mcontext->r12);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R13, signal_mcontext->r13);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R14, signal_mcontext->r14);
-    unw_set_reg(&unw_cursor, UNW_X86_64_R15, signal_mcontext->r15);
+size_t BackTrace(void** p, size_t len, ucontext_t* con) {
+    Y_UNUSED(con);
+    unw_context_t context;
+    unw_cursor_t cursor;
+    if (unw_getcontext(&context)) {
+        return 0;
+    }
+
+    if (unw_init_local(&cursor, &context)) {
+        return 0;
+    }
+    const sigcontext* signal_mcontext = (const sigcontext*)&(con->uc_mcontext);
+    unw_set_reg(&cursor, UNW_X86_64_RSI, signal_mcontext->rsi);
+    unw_set_reg(&cursor, UNW_X86_64_RDI, signal_mcontext->rdi);
+    unw_set_reg(&cursor, UNW_X86_64_RBP, signal_mcontext->rbp);
+    unw_set_reg(&cursor, UNW_X86_64_RAX, signal_mcontext->rax);
+    unw_set_reg(&cursor, UNW_X86_64_RBX, signal_mcontext->rbx);
+    unw_set_reg(&cursor, UNW_X86_64_RCX, signal_mcontext->rcx);
+    unw_set_reg(&cursor, UNW_X86_64_R8, signal_mcontext->r8);
+    unw_set_reg(&cursor, UNW_X86_64_R9, signal_mcontext->r9);
+    unw_set_reg(&cursor, UNW_X86_64_R10, signal_mcontext->r10);
+    unw_set_reg(&cursor, UNW_X86_64_R11, signal_mcontext->r11);
+    unw_set_reg(&cursor, UNW_X86_64_R12, signal_mcontext->r12);
+    unw_set_reg(&cursor, UNW_X86_64_R13, signal_mcontext->r13);
+    unw_set_reg(&cursor, UNW_X86_64_R14, signal_mcontext->r14);
+    unw_set_reg(&cursor, UNW_X86_64_R15, signal_mcontext->r15);
+    unw_set_reg(&cursor, UNW_X86_64_RSP, signal_mcontext->rsp);
 
-    unw_set_reg(&unw_cursor, UNW_REG_SP, 8 + signal_mcontext->rsp);
-    unw_set_reg(&unw_cursor, UNW_REG_IP, *(size_t*)signal_mcontext->rsp);
+    unw_set_reg(&cursor, UNW_REG_SP, signal_mcontext->rsp);
+    unw_set_reg(&cursor, UNW_REG_IP, signal_mcontext->rip);
 
     size_t pos = 0;
-    p[pos++] = (void*)signal_mcontext->rip;
-    p[pos++] = (void*)(*(size_t*)signal_mcontext->rsp);
-    while (pos < len && unw_step(&unw_cursor) > 0) {
+    while (pos < len && unw_step(&cursor) > 0) {
         unw_word_t ip = 0;
-        unw_get_reg(&unw_cursor, UNW_REG_IP, &ip);
+        unw_get_reg(&cursor, UNW_REG_IP, &ip);
+        if (unw_is_signal_frame(&cursor)) {
+            continue;
+        }
         p[pos++] = (void*)ip;
     }
     return pos;

ydb/library/yql/utils/backtrace/symbolize.cpp

@@ -59,10 +59,11 @@ TString Symbolize(const TString& input, const THashMap<TString, TString>& mappin
 #ifdef _linux_
         std::array<const void*, 1> addrs = { (const void*)frame.Address };
         auto error = NDwarf::ResolveBacktraceLocked(addrs, [&](const NDwarf::TLineInfo& info) {
-            if (!info.FileName.Empty())
-                out << info.FileName << ":" << info.Line << ":" << info.Col << " ";
             if (!info.FunctionName.Empty())
-                out << "in " << info.FunctionName << " ";
+                out << info.FunctionName << " ";
+            if (!info.FileName.Empty())
+                out << "at " << info.FileName << ":" << info.Line << ":" << info.Col << " ";
+            out << "\n";
             return NDwarf::EResolving::Continue;
         });
 

ydb/library/yql/utils/backtrace/symbolizer_linux.cpp

@@ -73,10 +73,11 @@ class TBacktraceSymbolizer : public IBacktraceSymbolizer {
         TStringOutput out(output);
 
         auto error = NDwarf::ResolveBacktraceLocked(addrs, [&](const NDwarf::TLineInfo& info) {
-            if (!info.FileName.Empty())
-                out << info.FileName << ":" << info.Line << ":" << info.Col << " ";
             if (!info.FunctionName.Empty())
-                out << "in " << info.FunctionName << " ";
+                out << info.FunctionName << " ";
+            if (!info.FileName.Empty())
+                out << "at " << info.FileName << ":" << info.Line << ":" << info.Col << " ";
+            out << "\n";
             return NDwarf::EResolving::Continue;
         });
 

ydb/library/yql/utils/backtrace/ya.make

@@ -9,6 +9,9 @@ IF (OS_LINUX AND ARCH_X86_64)
         backtrace_in_context.cpp
         symbolizer_linux.cpp
     )
+    ADDINCL(
+        contrib/libs/libunwind/include
+    )
     PEERDIR(
         contrib/libs/libunwind
         library/cpp/dwarf_backtrace