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[asan] two more internal flags for asan-rt: print_stats (0) and print_legend (1) 

llvm-svn: 173671
This commit is contained in:
Kostya Serebryany 2013-01-28 07:34:22 +00:00
parent 2cbcf1a320
commit 6c17547ef1
3 changed files with 28 additions and 14 deletions
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4
compiler-rt/lib/asan/asan_flags.h
View File

@ -79,6 +79,10 @@ struct Flags {
bool unmap_shadow_on_exit;
// If set, calls abort() instead of _exit() after printing an error report.
bool abort_on_error;
// Print various statistics after printing an error message or if atexit=1.
bool print_stats;
// Print the legend for the shadow bytes.
bool print_legend;
// If set, prints ASan exit stats even after program terminates successfully.
bool atexit;
// By default, disable core dumper on 64-bit - it makes little sense

34
compiler-rt/lib/asan/asan_report.cc
View File

@ -120,19 +120,7 @@ static void PrintShadowBytes(const char *before, u8 *bytes,
Printf("\n");
}
static void PrintShadowMemoryForAddress(uptr addr) {
if (!AddrIsInMem(addr))
return;
uptr shadow_addr = MemToShadow(addr);
const uptr n_bytes_per_row = 16;
uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
Printf("Shadow bytes around the buggy address:\n");
for (int i = -5; i <= 5; i++) {
const char *prefix = (i == 0) ? "=>" : " ";
PrintShadowBytes(prefix,
(u8*)(aligned_shadow + i * n_bytes_per_row),
(u8*)shadow_addr, n_bytes_per_row);
}
static void PrintLegend() {
Printf("Shadow byte legend (one shadow byte represents %d "
"application bytes):\n", (int)SHADOW_GRANULARITY);
PrintShadowByte(" Addressable: ", 0);
@ -155,6 +143,23 @@ static void PrintShadowMemoryForAddress(uptr addr) {
PrintShadowByte(" ASan internal: ", kAsanInternalHeapMagic);
}
static void PrintShadowMemoryForAddress(uptr addr) {
if (!AddrIsInMem(addr))
return;
uptr shadow_addr = MemToShadow(addr);
const uptr n_bytes_per_row = 16;
uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
Printf("Shadow bytes around the buggy address:\n");
for (int i = -5; i <= 5; i++) {
const char *prefix = (i == 0) ? "=>" : " ";
PrintShadowBytes(prefix,
(u8*)(aligned_shadow + i * n_bytes_per_row),
(u8*)shadow_addr, n_bytes_per_row);
}
if (flags()->print_legend)
PrintLegend();
}
static void PrintZoneForPointer(uptr ptr, uptr zone_ptr,
const char *zone_name) {
if (zone_ptr) {
@ -446,7 +451,8 @@ class ScopedInErrorReport {
DescribeThread(curr_thread->summary());
}
// Print memory stats.
__asan_print_accumulated_stats();
if (flags()->print_stats)
__asan_print_accumulated_stats();
if (error_report_callback) {
error_report_callback(error_message_buffer);
}

4
compiler-rt/lib/asan/asan_rtl.cc
View File

@ -97,6 +97,8 @@ static void ParseFlagsFromString(Flags *f, const char *str) {
ParseFlag(str, &f->check_malloc_usable_size, "check_malloc_usable_size");
ParseFlag(str, &f->unmap_shadow_on_exit, "unmap_shadow_on_exit");
ParseFlag(str, &f->abort_on_error, "abort_on_error");
ParseFlag(str, &f->print_stats, "print_stats");
ParseFlag(str, &f->print_legend, "print_legend");
ParseFlag(str, &f->atexit, "atexit");
ParseFlag(str, &f->disable_core, "disable_core");
ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix");
@ -135,6 +137,8 @@ void InitializeFlags(Flags *f, const char *env) {
f->check_malloc_usable_size = true;
f->unmap_shadow_on_exit = false;
f->abort_on_error = false;
f->print_stats = false;
f->print_legend = true;
f->atexit = false;
f->disable_core = (SANITIZER_WORDSIZE == 64);
f->strip_path_prefix = "";