forked from OSchip/llvm-project
133 lines
4.3 KiB
C++
133 lines
4.3 KiB
C++
//===-- sanitizer_common.cc -----------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between sanitizers' run-time libraries.
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//
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//===----------------------------------------------------------------------===//
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#include "sanitizer_stacktrace_printer.h"
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namespace __sanitizer {
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static const char *StripFunctionName(const char *function, const char *prefix) {
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if (function == 0) return 0;
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if (prefix == 0) return function;
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uptr prefix_len = internal_strlen(prefix);
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if (0 == internal_strncmp(function, prefix, prefix_len))
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return function + prefix_len;
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return function;
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}
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static const char kDefaultFormat[] = " #%n %p %F %L";
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void RenderFrame(InternalScopedString *buffer, const char *format, int frame_no,
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const AddressInfo &info, const char *strip_path_prefix,
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const char *strip_func_prefix) {
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if (0 == internal_strcmp(format, "DEFAULT"))
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format = kDefaultFormat;
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for (const char *p = format; *p != '\0'; p++) {
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if (*p != '%') {
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buffer->append("%c", *p);
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continue;
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}
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p++;
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switch (*p) {
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case '%':
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buffer->append("%%");
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break;
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// Frame number and all fields of AddressInfo structure.
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case 'n':
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buffer->append("%zu", frame_no);
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break;
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case 'p':
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buffer->append("0x%zx", info.address);
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break;
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case 'm':
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buffer->append("%s", StripPathPrefix(info.module, strip_path_prefix));
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break;
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case 'o':
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buffer->append("0x%zx", info.module_offset);
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break;
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case 'f':
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buffer->append("%s", StripFunctionName(info.function, strip_func_prefix));
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break;
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case 'q':
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buffer->append("0x%zx", info.function_offset != AddressInfo::kUnknown
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? info.function_offset
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: 0x0);
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break;
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case 's':
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buffer->append("%s", StripPathPrefix(info.file, strip_path_prefix));
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break;
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case 'l':
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buffer->append("%d", info.line);
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break;
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case 'c':
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buffer->append("%d", info.column);
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break;
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// Smarter special cases.
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case 'F':
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// Function name and offset, if file is unknown.
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if (info.function) {
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buffer->append("in %s",
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StripFunctionName(info.function, strip_func_prefix));
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if (!info.file && info.function_offset != AddressInfo::kUnknown)
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buffer->append("+0x%zx", info.function_offset);
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}
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break;
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case 'S':
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// File/line information.
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RenderSourceLocation(buffer, info.file, info.line, info.column,
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strip_path_prefix);
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break;
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case 'L':
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// Source location, or module location.
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if (info.file) {
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RenderSourceLocation(buffer, info.file, info.line, info.column,
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strip_path_prefix);
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} else if (info.module) {
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RenderModuleLocation(buffer, info.module, info.module_offset,
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strip_path_prefix);
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} else {
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buffer->append("(<unknown module>)");
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}
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break;
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case 'M':
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// Module basename and offset, or PC.
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if (info.module)
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buffer->append("(%s+%p)", StripModuleName(info.module),
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(void *)info.module_offset);
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else
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buffer->append("(%p)", (void *)info.address);
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break;
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default:
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Report("Unsupported specifier in stack frame format: %c (0x%zx)!\n",
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*p, *p);
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Die();
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}
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}
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}
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void RenderSourceLocation(InternalScopedString *buffer, const char *file,
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int line, int column, const char *strip_path_prefix) {
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buffer->append("%s", StripPathPrefix(file, strip_path_prefix));
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if (line > 0) {
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buffer->append(":%d", line);
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if (column > 0)
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buffer->append(":%d", column);
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}
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}
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void RenderModuleLocation(InternalScopedString *buffer, const char *module,
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uptr offset, const char *strip_path_prefix) {
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buffer->append("(%s+0x%zx)", StripPathPrefix(module, strip_path_prefix),
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offset);
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}
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} // namespace __sanitizer
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