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Diffstat (limited to 'lib/sanitizer_common/sanitizer_posix.cc')
-rw-r--r--lib/sanitizer_common/sanitizer_posix.cc98
1 files changed, 29 insertions, 69 deletions
diff --git a/lib/sanitizer_common/sanitizer_posix.cc b/lib/sanitizer_common/sanitizer_posix.cc
index abf6738a8daa..5ae68663df0e 100644
--- a/lib/sanitizer_common/sanitizer_posix.cc
+++ b/lib/sanitizer_common/sanitizer_posix.cc
@@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"
+
#if SANITIZER_POSIX
#include "sanitizer_common.h"
@@ -57,8 +58,8 @@ static uptr GetKernelAreaSize() {
// mapped to top gigabyte (e.g. stack).
MemoryMappingLayout proc_maps(/*cache_enabled*/true);
uptr end, prot;
- while (proc_maps.Next(/*start*/0, &end,
- /*offset*/0, /*filename*/0,
+ while (proc_maps.Next(/*start*/nullptr, &end,
+ /*offset*/nullptr, /*filename*/nullptr,
/*filename_size*/0, &prot)) {
if ((end >= 3 * gbyte)
&& (prot & MemoryMappingLayout::kProtectionWrite) != 0)
@@ -111,27 +112,14 @@ uptr GetMaxVirtualAddress() {
#endif // SANITIZER_WORDSIZE
}
-void *MmapOrDie(uptr size, const char *mem_type) {
+void *MmapOrDie(uptr size, const char *mem_type, bool raw_report) {
size = RoundUpTo(size, GetPageSizeCached());
- uptr res = internal_mmap(0, size,
- PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANON, -1, 0);
+ uptr res = internal_mmap(nullptr, size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANON, -1, 0);
int reserrno;
- if (internal_iserror(res, &reserrno)) {
- static int recursion_count;
- if (recursion_count) {
- // The Report() and CHECK calls below may call mmap recursively and fail.
- // If we went into recursion, just die.
- RawWrite("ERROR: Failed to mmap\n");
- Die();
- }
- recursion_count++;
- Report("ERROR: %s failed to "
- "allocate 0x%zx (%zd) bytes of %s (errno: %d)\n",
- SanitizerToolName, size, size, mem_type, reserrno);
- DumpProcessMap();
- CHECK("unable to mmap" && 0);
- }
+ if (internal_iserror(res, &reserrno))
+ ReportMmapFailureAndDie(size, mem_type, "allocate", reserrno, raw_report);
IncreaseTotalMmap(size);
return (void *)res;
}
@@ -149,18 +137,14 @@ void UnmapOrDie(void *addr, uptr size) {
void *MmapNoReserveOrDie(uptr size, const char *mem_type) {
uptr PageSize = GetPageSizeCached();
- uptr p = internal_mmap(0,
- RoundUpTo(size, PageSize),
- PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
- -1, 0);
+ uptr p = internal_mmap(nullptr,
+ RoundUpTo(size, PageSize),
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
+ -1, 0);
int reserrno;
- if (internal_iserror(p, &reserrno)) {
- Report("ERROR: %s failed to "
- "allocate noreserve 0x%zx (%zd) bytes for '%s' (errno: %d)\n",
- SanitizerToolName, size, size, mem_type, reserrno);
- CHECK("unable to mmap" && 0);
- }
+ if (internal_iserror(p, &reserrno))
+ ReportMmapFailureAndDie(size, mem_type, "allocate noreserve", reserrno);
IncreaseTotalMmap(size);
return (void *)p;
}
@@ -174,10 +158,10 @@ void *MmapFixedOrDie(uptr fixed_addr, uptr size) {
-1, 0);
int reserrno;
if (internal_iserror(p, &reserrno)) {
- Report("ERROR: %s failed to "
- "allocate 0x%zx (%zd) bytes at address %zx (errno: %d)\n",
- SanitizerToolName, size, size, fixed_addr, reserrno);
- CHECK("unable to mmap" && 0);
+ char mem_type[30];
+ internal_snprintf(mem_type, sizeof(mem_type), "memory at address 0x%zx",
+ fixed_addr);
+ ReportMmapFailureAndDie(size, mem_type, "allocate", reserrno);
}
IncreaseTotalMmap(size);
return (void *)p;
@@ -236,8 +220,8 @@ void *MapFileToMemory(const char *file_name, uptr *buff_size) {
CHECK_NE(fsize, (uptr)-1);
CHECK_GT(fsize, 0);
*buff_size = RoundUpTo(fsize, GetPageSizeCached());
- uptr map = internal_mmap(0, *buff_size, PROT_READ, MAP_PRIVATE, fd, 0);
- return internal_iserror(map) ? 0 : (void *)map;
+ uptr map = internal_mmap(nullptr, *buff_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ return internal_iserror(map) ? nullptr : (void *)map;
}
void *MapWritableFileToMemory(void *addr, uptr size, fd_t fd, OFF_T offset) {
@@ -248,7 +232,7 @@ void *MapWritableFileToMemory(void *addr, uptr size, fd_t fd, OFF_T offset) {
if (internal_iserror(p, &mmap_errno)) {
Printf("could not map writable file (%d, %lld, %zu): %zd, errno: %d\n",
fd, (long long)offset, size, p, mmap_errno);
- return 0;
+ return nullptr;
}
return (void *)p;
}
@@ -268,8 +252,8 @@ bool MemoryRangeIsAvailable(uptr range_start, uptr range_end) {
MemoryMappingLayout proc_maps(/*cache_enabled*/true);
uptr start, end;
while (proc_maps.Next(&start, &end,
- /*offset*/0, /*filename*/0, /*filename_size*/0,
- /*protection*/0)) {
+ /*offset*/nullptr, /*filename*/nullptr,
+ /*filename_size*/0, /*protection*/nullptr)) {
if (start == end) continue; // Empty range.
CHECK_NE(0, end);
if (!IntervalsAreSeparate(start, end - 1, range_start, range_end))
@@ -284,8 +268,8 @@ void DumpProcessMap() {
const sptr kBufSize = 4095;
char *filename = (char*)MmapOrDie(kBufSize, __func__);
Report("Process memory map follows:\n");
- while (proc_maps.Next(&start, &end, /* file_offset */0,
- filename, kBufSize, /* protection */0)) {
+ while (proc_maps.Next(&start, &end, /* file_offset */nullptr,
+ filename, kBufSize, /* protection */nullptr)) {
Printf("\t%p-%p\t%s\n", (void*)start, (void*)end, filename);
}
Report("End of process memory map.\n");
@@ -296,30 +280,6 @@ const char *GetPwd() {
return GetEnv("PWD");
}
-char *FindPathToBinary(const char *name) {
- const char *path = GetEnv("PATH");
- if (!path)
- return 0;
- uptr name_len = internal_strlen(name);
- InternalScopedBuffer<char> buffer(kMaxPathLength);
- const char *beg = path;
- while (true) {
- const char *end = internal_strchrnul(beg, ':');
- uptr prefix_len = end - beg;
- if (prefix_len + name_len + 2 <= kMaxPathLength) {
- internal_memcpy(buffer.data(), beg, prefix_len);
- buffer[prefix_len] = '/';
- internal_memcpy(&buffer[prefix_len + 1], name, name_len);
- buffer[prefix_len + 1 + name_len] = '\0';
- if (FileExists(buffer.data()))
- return internal_strdup(buffer.data());
- }
- if (*end == '\0') break;
- beg = end + 1;
- }
- return 0;
-}
-
bool IsPathSeparator(const char c) {
return c == '/';
}
@@ -361,6 +321,6 @@ SignalContext SignalContext::Create(void *siginfo, void *context) {
return SignalContext(context, addr, pc, sp, bp);
}
-} // namespace __sanitizer
+} // namespace __sanitizer
-#endif // SANITIZER_POSIX
+#endif // SANITIZER_POSIX
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 17:12:50 +0000