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//===-- sanitizer_common.cc -----------------------------------------------===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between sanitizers' run-time libraries.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_stacktrace_printer.h"
namespace __sanitizer {
static const char *StripFunctionName(const char *function, const char *prefix) {
if (!function) return nullptr;
if (!prefix) return function;
uptr prefix_len = internal_strlen(prefix);
if (0 == internal_strncmp(function, prefix, prefix_len))
return function + prefix_len;
return function;
}
static const char kDefaultFormat[] = " #%n %p %F %L";
void RenderFrame(InternalScopedString *buffer, const char *format, int frame_no,
const AddressInfo &info, bool vs_style,
const char *strip_path_prefix, const char *strip_func_prefix) {
if (0 == internal_strcmp(format, "DEFAULT"))
format = kDefaultFormat;
for (const char *p = format; *p != '\0'; p++) {
if (*p != '%') {
buffer->append("%c", *p);
continue;
}
p++;
switch (*p) {
case '%':
buffer->append("%%");
break;
// Frame number and all fields of AddressInfo structure.
case 'n':
buffer->append("%zu", frame_no);
break;
case 'p':
buffer->append("0x%zx", info.address);
break;
case 'm':
buffer->append("%s", StripPathPrefix(info.module, strip_path_prefix));
break;
case 'o':
buffer->append("0x%zx", info.module_offset);
break;
case 'f':
buffer->append("%s", StripFunctionName(info.function, strip_func_prefix));
break;
case 'q':
buffer->append("0x%zx", info.function_offset != AddressInfo::kUnknown
? info.function_offset
: 0x0);
break;
case 's':
buffer->append("%s", StripPathPrefix(info.file, strip_path_prefix));
break;
case 'l':
buffer->append("%d", info.line);
break;
case 'c':
buffer->append("%d", info.column);
break;
// Smarter special cases.
case 'F':
// Function name and offset, if file is unknown.
if (info.function) {
buffer->append("in %s",
StripFunctionName(info.function, strip_func_prefix));
if (!info.file && info.function_offset != AddressInfo::kUnknown)
buffer->append("+0x%zx", info.function_offset);
}
break;
case 'S':
// File/line information.
RenderSourceLocation(buffer, info.file, info.line, info.column, vs_style,
strip_path_prefix);
break;
case 'L':
// Source location, or module location.
if (info.file) {
RenderSourceLocation(buffer, info.file, info.line, info.column,
vs_style, strip_path_prefix);
} else if (info.module) {
RenderModuleLocation(buffer, info.module, info.module_offset,
strip_path_prefix);
} else {
buffer->append("(<unknown module>)");
}
break;
case 'M':
// Module basename and offset, or PC.
if (info.address & kExternalPCBit)
{} // There PCs are not meaningful.
else if (info.module)
buffer->append("(%s+%p)", StripModuleName(info.module),
(void *)info.module_offset);
else
buffer->append("(%p)", (void *)info.address);
break;
default:
Report("Unsupported specifier in stack frame format: %c (0x%zx)!\n", *p,
*p);
Die();
}
}
}
void RenderSourceLocation(InternalScopedString *buffer, const char *file,
int line, int column, bool vs_style,
const char *strip_path_prefix) {
if (vs_style && line > 0) {
buffer->append("%s(%d", StripPathPrefix(file, strip_path_prefix), line);
if (column > 0)
buffer->append(",%d", column);
buffer->append(")");
return;
}
buffer->append("%s", StripPathPrefix(file, strip_path_prefix));
if (line > 0) {
buffer->append(":%d", line);
if (column > 0)
buffer->append(":%d", column);
}
}
void RenderModuleLocation(InternalScopedString *buffer, const char *module,
uptr offset, const char *strip_path_prefix) {
buffer->append("(%s+0x%zx)", StripPathPrefix(module, strip_path_prefix),
offset);
}
} // namespace __sanitizer
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