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-rw-r--r--src/call_stack.cpp101
-rw-r--r--src/dbghelp.cpp12
2 files changed, 109 insertions, 4 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
diff --git a/src/dbghelp.cpp b/src/dbghelp.cpp
index 399271e..0105682 100644
--- a/src/dbghelp.cpp
+++ b/src/dbghelp.cpp
@@ -23,10 +23,10 @@ void set_dbghelp_options() {
SymSetOptions(SymGetOptions() | SYMOPT_DEBUG | SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
}
-void initialize(HANDLE id) {
+void initialize(HANDLE id, bool invade_current_process) {
set_dbghelp_options();
- if (!SymInitialize(id, NULL, FALSE))
+ if (!SymInitialize(id, NULL, invade_current_process ? TRUE : FALSE))
throw error::windows(GetLastError());
}
@@ -87,8 +87,8 @@ void enum_symbols(HANDLE id,
} // namespace
-DbgHelp::DbgHelp() {
- initialize(id);
+DbgHelp::DbgHelp(bool invade_current_process) {
+ initialize(id, invade_current_process);
}
DbgHelp::~DbgHelp() {
@@ -132,6 +132,10 @@ void DbgHelp::enum_modules(const OnModule& callback) const {
throw error::windows(GetLastError());
}
+ModuleInfo DbgHelp::resolve_module(Address offline) const {
+ return get_module_info(id, offline);
+}
+
void DbgHelp::enum_symbols(const ModuleInfo& module,
const std::string& mask,
const OnSymbol& callback) const {