diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2017-01-02 19:18:27 +0000 |
---|---|---|
committer | Dimitry Andric <dim@FreeBSD.org> | 2017-01-02 19:18:27 +0000 |
commit | 316d58822dada9440bd06ecfc758dcc2364d617c (patch) | |
tree | fe72ec2e6ce9a360dda74d9d57f7acdb0e3c39d6 /lib/asan/asan_debugging.cc | |
parent | 0230fcf22fe7d19f03d981c9c2c59a3db0b72ea5 (diff) | |
download | src-316d58822dada9440bd06ecfc758dcc2364d617c.tar.gz src-316d58822dada9440bd06ecfc758dcc2364d617c.zip |
Vendor import of compiler-rt trunk r290819:vendor/compiler-rt/compiler-rt-trunk-r290819
Notes
Notes:
svn path=/vendor/compiler-rt/dist/; revision=311120
svn path=/vendor/compiler-rt/compiler-rt-trunk-r290819/; revision=311121; tag=vendor/compiler-rt/compiler-rt-trunk-r290819
Diffstat (limited to 'lib/asan/asan_debugging.cc')
-rw-r--r-- | lib/asan/asan_debugging.cc | 125 |
1 files changed, 65 insertions, 60 deletions
diff --git a/lib/asan/asan_debugging.cc b/lib/asan/asan_debugging.cc index 7c3a8a73bd4e..37c5922dc0fc 100644 --- a/lib/asan/asan_debugging.cc +++ b/lib/asan/asan_debugging.cc @@ -14,74 +14,39 @@ //===----------------------------------------------------------------------===// #include "asan_allocator.h" +#include "asan_descriptions.h" #include "asan_flags.h" #include "asan_internal.h" #include "asan_mapping.h" #include "asan_report.h" #include "asan_thread.h" -namespace __asan { - -void GetInfoForStackVar(uptr addr, AddressDescription *descr, AsanThread *t) { - descr->name[0] = 0; - descr->region_address = 0; - descr->region_size = 0; - descr->region_kind = "stack"; +namespace { +using namespace __asan; - AsanThread::StackFrameAccess access; - if (!t->GetStackFrameAccessByAddr(addr, &access)) - return; +static void FindInfoForStackVar(uptr addr, const char *frame_descr, uptr offset, + char *name, uptr name_size, + uptr ®ion_address, uptr ®ion_size) { InternalMmapVector<StackVarDescr> vars(16); - if (!ParseFrameDescription(access.frame_descr, &vars)) { + if (!ParseFrameDescription(frame_descr, &vars)) { return; } for (uptr i = 0; i < vars.size(); i++) { - if (access.offset <= vars[i].beg + vars[i].size) { - internal_strncat(descr->name, vars[i].name_pos, - Min(descr->name_size, vars[i].name_len)); - descr->region_address = addr - (access.offset - vars[i].beg); - descr->region_size = vars[i].size; + if (offset <= vars[i].beg + vars[i].size) { + // We use name_len + 1 because strlcpy will guarantee a \0 at the end, so + // if we're limiting the copy due to name_len, we add 1 to ensure we copy + // the whole name and then terminate with '\0'. + internal_strlcpy(name, vars[i].name_pos, + Min(name_size, vars[i].name_len + 1)); + region_address = addr - (offset - vars[i].beg); + region_size = vars[i].size; return; } } } -void GetInfoForHeapAddress(uptr addr, AddressDescription *descr) { - AsanChunkView chunk = FindHeapChunkByAddress(addr); - - descr->name[0] = 0; - descr->region_address = 0; - descr->region_size = 0; - - if (!chunk.IsValid()) { - descr->region_kind = "heap-invalid"; - return; - } - - descr->region_address = chunk.Beg(); - descr->region_size = chunk.UsedSize(); - descr->region_kind = "heap"; -} - -void AsanLocateAddress(uptr addr, AddressDescription *descr) { - if (DescribeAddressIfShadow(addr, descr, /* print */ false)) { - return; - } - if (GetInfoForAddressIfGlobal(addr, descr)) { - return; - } - asanThreadRegistry().Lock(); - AsanThread *thread = FindThreadByStackAddress(addr); - asanThreadRegistry().Unlock(); - if (thread) { - GetInfoForStackVar(addr, descr, thread); - return; - } - GetInfoForHeapAddress(addr, descr); -} - -static uptr AsanGetStack(uptr addr, uptr *trace, u32 size, u32 *thread_id, +uptr AsanGetStack(uptr addr, uptr *trace, u32 size, u32 *thread_id, bool alloc_stack) { AsanChunkView chunk = FindHeapChunkByAddress(addr); if (!chunk.IsValid()) return 0; @@ -108,18 +73,58 @@ static uptr AsanGetStack(uptr addr, uptr *trace, u32 size, u32 *thread_id, return 0; } -} // namespace __asan - -using namespace __asan; +} // namespace SANITIZER_INTERFACE_ATTRIBUTE const char *__asan_locate_address(uptr addr, char *name, uptr name_size, - uptr *region_address, uptr *region_size) { - AddressDescription descr = { name, name_size, 0, 0, nullptr }; - AsanLocateAddress(addr, &descr); - if (region_address) *region_address = descr.region_address; - if (region_size) *region_size = descr.region_size; - return descr.region_kind; + uptr *region_address_ptr, + uptr *region_size_ptr) { + AddressDescription descr(addr); + uptr region_address = 0; + uptr region_size = 0; + const char *region_kind = nullptr; + if (name && name_size > 0) name[0] = 0; + + if (auto shadow = descr.AsShadow()) { + // region_{address,size} are already 0 + switch (shadow->kind) { + case kShadowKindLow: + region_kind = "low shadow"; + break; + case kShadowKindGap: + region_kind = "shadow gap"; + break; + case kShadowKindHigh: + region_kind = "high shadow"; + break; + } + } else if (auto heap = descr.AsHeap()) { + region_kind = "heap"; + region_address = heap->chunk_access.chunk_begin; + region_size = heap->chunk_access.chunk_size; + } else if (auto stack = descr.AsStack()) { + region_kind = "stack"; + if (!stack->frame_descr) { + // region_{address,size} are already 0 + } else { + FindInfoForStackVar(addr, stack->frame_descr, stack->offset, name, + name_size, region_address, region_size); + } + } else if (auto global = descr.AsGlobal()) { + region_kind = "global"; + auto &g = global->globals[0]; + internal_strlcpy(name, g.name, name_size); + region_address = g.beg; + region_size = g.size; + } else { + // region_{address,size} are already 0 + region_kind = "heap-invalid"; + } + + CHECK(region_kind); + if (region_address_ptr) *region_address_ptr = region_address; + if (region_size_ptr) *region_size_ptr = region_size; + return region_kind; } SANITIZER_INTERFACE_ATTRIBUTE |