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1//===-- sanitizer_stacktrace_printer.h --------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is shared between sanitizers' run-time libraries.
10//
11//===----------------------------------------------------------------------===//
12#ifndef SANITIZER_STACKTRACE_PRINTER_H
13#define SANITIZER_STACKTRACE_PRINTER_H
14
15#include "sanitizer_common.h"
16#include "sanitizer_internal_defs.h"
17#include "sanitizer_symbolizer.h"
18
19namespace __sanitizer {
20
21// StacktracePrinter is an interface that is implemented by
22// classes that can perform rendering of the different parts
23// of a stacktrace.
24class StackTracePrinter {
25 public:
26 static StackTracePrinter *GetOrInit();
27
28 // Strip interceptor prefixes from function name.
29 const char *StripFunctionName(const char *function);
30
31 virtual void RenderFrame(InternalScopedString *buffer, const char *format,
32 int frame_no, uptr address, const AddressInfo *info,
33 bool vs_style, const char *strip_path_prefix = "") {
34 // Should be pure virtual, but we can't depend on __cxa_pure_virtual.
35 UNIMPLEMENTED();
36 }
37
38 virtual bool RenderNeedsSymbolization(const char *format) {
39 // Should be pure virtual, but we can't depend on __cxa_pure_virtual.
40 UNIMPLEMENTED();
41 }
42
43 void RenderSourceLocation(InternalScopedString *buffer, const char *file,
44 int line, int column, bool vs_style,
45 const char *strip_path_prefix);
46
47 void RenderModuleLocation(InternalScopedString *buffer, const char *module,
48 uptr offset, ModuleArch arch,
49 const char *strip_path_prefix);
50 virtual void RenderData(InternalScopedString *buffer, const char *format,
51 const DataInfo *DI,
52 const char *strip_path_prefix = "") {
53 // Should be pure virtual, but we can't depend on __cxa_pure_virtual.
54 UNIMPLEMENTED();
55 }
56
57 private:
58 // To be called from StackTracePrinter::GetOrInit
59 static StackTracePrinter *NewStackTracePrinter();
60
61 protected:
62 ~StackTracePrinter() {}
63};
64
65class FormattedStackTracePrinter : public StackTracePrinter {
66 public:
67 // Render the contents of "info" structure, which represents the contents of
68 // stack frame "frame_no" and appends it to the "buffer". "format" is a
69 // string with placeholders, which is copied to the output with
70 // placeholders substituted with the contents of "info". For example,
71 // format string
72 // " frame %n: function %F at %S"
73 // will be turned into
74 // " frame 10: function foo::bar() at my/file.cc:10"
75 // You may additionally pass "strip_path_prefix" to strip prefixes of paths to
76 // source files and modules.
77 // Here's the full list of available placeholders:
78 // %% - represents a '%' character;
79 // %n - frame number (copy of frame_no);
80 // %p - PC in hex format;
81 // %m - path to module (binary or shared object);
82 // %o - offset in the module in hex format;
83 // %f - function name;
84 // %q - offset in the function in hex format (*if available*);
85 // %s - path to source file;
86 // %l - line in the source file;
87 // %c - column in the source file;
88 // %F - if function is known to be <foo>, prints "in <foo>", possibly
89 // followed by the offset in this function, but only if source file
90 // is unknown;
91 // %S - prints file/line/column information;
92 // %L - prints location information: file/line/column, if it is known, or
93 // module+offset if it is known, or (<unknown module>) string.
94 // %M - prints module basename and offset, if it is known, or PC.
95 void RenderFrame(InternalScopedString *buffer, const char *format,
96 int frame_no, uptr address, const AddressInfo *info,
97 bool vs_style, const char *strip_path_prefix = "") override;
98
99 bool RenderNeedsSymbolization(const char *format) override;
100
101 // Same as RenderFrame, but for data section (global variables).
102 // Accepts %s, %l from above.
103 // Also accepts:
104 // %g - name of the global variable.
105 void RenderData(InternalScopedString *buffer, const char *format,
106 const DataInfo *DI,
107 const char *strip_path_prefix = "") override;
108
109 protected:
110 ~FormattedStackTracePrinter() {}
111};
112
113} // namespace __sanitizer
114
115#endif // SANITIZER_STACKTRACE_PRINTER_H