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sanitizer_common: bump default file max size to 256MB 

I am hitting some cases where /proc/self/maps does not fit into 64MB.
256MB is lots of memory, but it's not radically more than the current 64MB.
Ideally we should read/parse these huge files incrementally,
but that's lots of work for a debugging/introspection interface.
So for now just bump the limit.

Depends on D112793.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D112794
This commit is contained in:
Dmitry Vyukov 2021-10-29 11:40:11 +02:00
parent e8861fa6c3
commit af0a8b8317
1 changed files with 5 additions and 2 deletions
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7
compiler-rt/lib/sanitizer_common/sanitizer_common.h
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@ -721,12 +721,15 @@ void SortAndDedup(Container &v, Compare comp = {}) {
v.resize(last + 1); v.resize(last + 1);
} }
constexpr uptr kDefaultFileMaxSize = FIRST_32_SECOND_64(1 << 26, 1 << 28);
// Opens the file 'file_name" and reads up to 'max_len' bytes. // Opens the file 'file_name" and reads up to 'max_len' bytes.
// The resulting buffer is mmaped and stored in '*buff'. // The resulting buffer is mmaped and stored in '*buff'.
// Returns true if file was successfully opened and read. // Returns true if file was successfully opened and read.
bool ReadFileToVector(const char *file_name, bool ReadFileToVector(const char *file_name,
InternalMmapVectorNoCtor<char> *buff, InternalMmapVectorNoCtor<char> *buff,
uptr max_len = 1 << 26, error_t *errno_p = nullptr); uptr max_len = kDefaultFileMaxSize,
error_t *errno_p = nullptr);
// Opens the file 'file_name" and reads up to 'max_len' bytes. // Opens the file 'file_name" and reads up to 'max_len' bytes.
// This function is less I/O efficient than ReadFileToVector as it may reread // This function is less I/O efficient than ReadFileToVector as it may reread
@ -737,7 +740,7 @@ bool ReadFileToVector(const char *file_name,
// The total number of read bytes is stored in '*read_len'. // The total number of read bytes is stored in '*read_len'.
// Returns true if file was successfully opened and read. // Returns true if file was successfully opened and read.
bool ReadFileToBuffer(const char *file_name, char **buff, uptr *buff_size, bool ReadFileToBuffer(const char *file_name, char **buff, uptr *buff_size,
uptr *read_len, uptr max_len = 1 << 26, uptr *read_len, uptr max_len = kDefaultFileMaxSize,
error_t *errno_p = nullptr); error_t *errno_p = nullptr);
// When adding a new architecture, don't forget to also update // When adding a new architecture, don't forget to also update