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authorEgor Tensin <Egor.Tensin@gmail.com>2020-01-15 19:20:50 +0300
committerEgor Tensin <Egor.Tensin@gmail.com>2020-01-16 01:21:32 +0300
commit3dc0b9a3ae90dcac2f1150e6b2dfb0a5a310355b (patch)
treefca7da94fdc0f4693a8b49b765738b9e842a1407 /src/call_stack.cpp
parentlab_rat -> foobar (diff)
downloadwinapi-debug-3dc0b9a3ae90dcac2f1150e6b2dfb0a5a310355b.tar.gz
winapi-debug-3dc0b9a3ae90dcac2f1150e6b2dfb0a5a310355b.zip
add call stack collection support
Diffstat (limited to 'src/call_stack.cpp')
-rw-r--r--src/call_stack.cpp101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/call_stack.cpp b/src/call_stack.cpp
new file mode 100644
index 0000000..e421d34
--- /dev/null
+++ b/src/call_stack.cpp
@@ -0,0 +1,101 @@
+// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
+// This file is part of the "PDB repository" project.
+// For details, see https://github.com/egor-tensin/pdb-repo.
+// Distributed under the MIT License.
+
+#include "pdb/all.hpp"
+
+#include <SafeInt.hpp>
+
+#include <Windows.h>
+
+#include <algorithm>
+#include <array>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <system_error>
+
+namespace pdb {
+namespace call_stack {
+namespace {
+
+template <typename T>
+static std::string put_between_brackets(const T& x) {
+ std::ostringstream oss;
+ oss << "[" << x << "]";
+ return oss.str();
+}
+
+std::string format_address_fallback(Address addr) {
+ return put_between_brackets(format_address(addr));
+}
+
+std::string offset_from(const std::string& thing, Address offset) {
+ if (offset == 0)
+ return put_between_brackets(thing);
+ else
+ return put_between_brackets(thing + "+" + format_address(offset));
+}
+
+std::string offset_from_module(const ModuleInfo& module, Address addr) {
+ Address offset = 0;
+ if (!SafeSubtract(addr, module.get_offline_base(), offset))
+ throw std::range_error{"invalid address in module"};
+ return offset_from(module.get_name(), offset);
+}
+
+std::string offset_from_symbol(const SymbolInfo& symbol) {
+ return offset_from(symbol.get_name(), symbol.get_displacement());
+}
+
+std::string offset_from_symbol(const ModuleInfo& module, const SymbolInfo& symbol) {
+ return offset_from(module.get_name() + "!" + symbol.get_name(), symbol.get_displacement());
+}
+
+std::string resolve_and_format(const DbgHelp& dbghelp, const SymbolInfo& symbol, Address addr) {
+ try {
+ const auto module = dbghelp.resolve_module(addr);
+ return offset_from_symbol(module, symbol);
+ } catch (const std::system_error&) {
+ return offset_from_symbol(symbol);
+ }
+}
+
+std::string resolve_and_format(const DbgHelp& dbghelp, Address addr) {
+ try {
+ const auto symbol = dbghelp.resolve_symbol(addr);
+ return resolve_and_format(dbghelp, symbol, addr);
+ } catch (const std::system_error&) {
+ try {
+ const auto module = dbghelp.resolve_module(addr);
+ return offset_from_module(module, addr);
+ } catch (const std::system_error&) {
+ return format_address_fallback(addr);
+ }
+ }
+ assert(false);
+ return {};
+}
+
+} // namespace
+
+std::string pretty_print_address(const DbgHelp& dbghelp, Address addr) {
+ return resolve_and_format(dbghelp, addr);
+}
+
+} // namespace call_stack
+
+CallStack CallStack::capture() {
+ std::array<void*, max_length> frames_impl{nullptr};
+ const auto length =
+ CaptureStackBackTrace(frames_to_skip, frames_to_capture, frames_impl.data(), NULL);
+
+ std::array<Address, max_length> frames;
+ std::transform(frames_impl.cbegin(), frames_impl.cend(), frames.begin(), [](void* addr) {
+ return reinterpret_cast<Address>(addr);
+ });
+ return {frames, length};
+}
+
+} // namespace pdb